usical instruments and acoustics (G10)

G   Physics(391163)
G10            usical instruments; acoustics(2944)

ethod and device for sound signal optimisation // 2628473
FIELD: physics.SUBSTANCE: method is used in a terminal comprising at least two sound detecting units and the method includes: determining positions of sound sources around the terminal using at least two sound detecting units, selecting a designated sound source among the corresponding sound sources detected by position determination; determining the sound signal emitted from the designated sound source among the sound signals collected by the terminal in accordance with the spatial position of the designated sound source detected by position determination; and optimizing the volume of the sound signal emitted from the designated sound source. According to the present invention, when collecting sound signals due to selection of the surrounding sound sources and optimisation of the sound signal emitted from the selected sound source, the result of the sound signal detection by the terminal is improved.EFFECT: improved result of the sound detection by the terminal.11 cl, 7 dwg

Real-in-complex transformation with a small delay in bank filters with overlapping for partially integrated treatment // 2628219
FIELD: physics.SUBSTANCE: configuration of the filter banks with overlapping contains a synthesis cascade and an analysis cascade. The synthesis stage receives the first signal segmented into time blocks and outputs on this basis an intermediate signal to be received by the cascade of analysis, forming the basis for calculating the second signal segmented into time frames. In an embodiment, the synthesis stage is configured to output an approximate value of an intermediate signal in a time block located at L-1 time blocks ahead of its output block, the approximate value being calculated based on any available time blocks of the first signal such that the approximate value contributes to the second signal in the cascade of analysis. The delay is usually reduced by L-1 blocks. Applications include the processing of an audio signal in general and, in particular, a real-to-complex transformation.EFFECT: decreasing the delay of conversion.22 cl, 12 dwg, 1 tbl

asking errors in pictures // 2628197
FIELD: physics.SUBSTANCE: tracking (S11) sign changes between the corresponding conversion factors of predefined sub-vectors of successive good stationary frames; accumulating (S12) the number of sign changes in the respective sub-vectors of a predetermined number of successive good stationary frames; reconstructing (S13) the error frame with the help of the last good stationary frame, but with the reverse signs of the transformation coefficients in the sub-vectors having the accumulated number of sign changes that exceeds the predetermined threshold.EFFECT: improved masking of errors in frames due to the lack of transmission of additional third-party parameters or the formation of additional delays required by interpolation.12 cl, 16 dwg, 1 tbl

Decoder and method of parametric generalized concept of the spatial coding of digital audio objects for multi-channel mixing decreasing cases/step-up mixing // 2628195
FIELD: physics.SUBSTANCE: decoder to generate audio output contains one or more audio output from mixing with decreasing signal containing one or more channels of decreasing-mixing. Mixing with decreasing signal encodes one or more signals of digital audio objects. Decoder contains the determinant of a threshold to determine the threshold depending on the power signal and/or energy noise, at least one of the one or more signals of digital audio objects and/or depending on the power signal and/or energy noise, at least one of the one or more channels of decreasing-mixing. Moreover, the decoder contains a processing unit for generating of referred one or more output audio channels mentioned one or more channels of mixing ground depending on the threshold.EFFECT: improving the quality of encoding audio objects.14 cl, 4 dwg
ethods of coding and decoding sound, corresponding machine-readable media and corresponding coding device and device for sound decoding // 2628177
FIELD: physics.SUBSTANCE: according to the disclosure, this is achieved by calculating and applying two weighting factors, one for the approximated sound object and the other for the decorrelated audio object, for decorrelating the sound objects into the sound encoding system.EFFECT: providing the opportunity to improve the sound object recovery, less complex and more flexible control of the encoded decorrelation sound.28 cl, 7 dwg

Audio encoder, audio decoder, method of coding and decoding audio information and computer program, determining value of context sub-adaption based on norm of the decoded spectral values // 2628162
FIELD: information technology.SUBSTANCE: encoder, an audio decoder, method of encoding and decoding audio information, and a computer program are proposed to obtain a frequency value based on the previously normal decoded spectral values. The audio decoder for providing decoded audio information based on the encoded audio information includes an arithmetic decoder for providing a plurality of decoded spectral values based on the arithmetic encoded spectral value representation, and a time-frequency converter for providing audio representation of a time domain using the decoded spectral values to obtain decoded audio information, the arithmetic decoder selects a mapping rule that describes the mapping of the code values for the symbol code, depending on the context state, which is described by the numerical value of the current context, determines the numerical value of the current context, depending on the set of the previously decoded spectral values.EFFECT: reducing the encoding errors of the input audio information spectral values.19 cl, 24 dwg

Decoding method and decoding device // 2628159
FIELD: physics.SUBSTANCE: decoding method comprises the stages whereat: if it is determined that the current frame of the speech signal is a lost frame, the high frequency band signal is synthesized according to the decoding result of the previous frame with respect to the current frame; subframe amplification of at least two subframes of the current frame is determined according to the subframe amplifications of the subframes of at least one frame, previous to the current frame, and the amplification gradient between the subframes of at least one frame; global amplification of the current frame is determined and the synthesized high frequency band signal is adjusted according to the global amplification and the subframe amplifications of at least two subframes so as to receive the high frequency band signal of the current frame.EFFECT: preventing or reducing the phenomenon of noise during the processing of frame losses, thereby improving the quality of speech.15 cl, 12 dwg

ethod and device for controlling audio frame loss masking // 2628144
FIELD: physics.SUBSTANCE: transient condition is detected in the property of the previously received and restored audio signal (which indicates a signal surge or decay) that can lead to a suboptimal quality of recovery, when the original masking method is used to create a substitute frame. The original masking method is modified by selectively adjusting the amplitude of the substitute frame spectrum, when the transient condition is detected. Additionally, the second condition is observed in the statistical property of observed frame losses, which can lead to a non-optimal quality of recovery, when the original masking method is used to create a substitute frame. Additionally, the original masking method is modified by selectively adjusting the amplitude of the substitute frame spectrum, when the second condition is detected. The second condition is the loss of several frames in a row.EFFECT: increasing the quality of masking in case of audio frame loss.27 cl, 15 dwg

ethod for forming and usage of the inverted index of audio recording and machinescent of information storage device // 2628118
FIELD: physics.SUBSTANCE: method of forming and using an inverted audio recording index involves obtaining a new audio for indexing, determining the first chromed word associated with the new audio recording for indexing the first chromed word containing the initial portion of the chromium word which is a subset of the bytes having the first byte and subsequent bytes immediately after the first mentioned byte, determining a specific set of wordposition lists based on the first byte in a plurality of sets of wordposition lists. A particular set of word-list comprises lists words having reference to chrome word with the same first byte in the initial part, while under the subsequent byte of first chrome word of any subsequent bytes of any chrome word stored in the list of records in a particular set of records lists, maintaining the display of the new first chrome word in this recording list, followed by the non-byte first chrome word any subsequent bytes of any chrome word stored in the record lists, formation of new list of records in a particular set of records lists while maintaining display of the new chrome word.EFFECT: effective search for duplicates of musical compositions.32 cl, 8 dwg
Sound-absorbing structure // 2627517
FIELD: machine engineering.SUBSTANCE: sound-absorbing structure is made in the form of solid and perforated wall, between which there is a multilayer sound-absorbing element, in which a resonance type element is arranged between the sound-absorbing layer and a layer of sound-reflecting material with complex profile made in the form of rigid resonance plate with resonance holes performing the functions of Helmholtz resonators neck. The functions of Helmholtz resonator volumes are performed by a layer of sound reflecting material with complex profile consisting of uniformly distributed hollow tetrahedrons allowing to reflect acoustic waves falling in all directions.EFFECT: increase of sound absorption efficiency and structure reliability.1 dwg
Kochetov's sound-absorbing structure // 2627509
FIELD: machine engineering.SUBSTANCE: sound-absorbing structure includes rigid solid and perforated walls, between which a two-layer combined sound-absorbing element is located. Between the sound-absorbing layer and a layer of sound-reflecting material of complex profile adjacent to it, an element of resonant type is located. The latter is made in the form of rigid resonance plate with resonant holes that perform functions of Helmholtz resonators neck. At that the functions of Helmholtz resonator volumes are performed by a layer of sound reflecting material with complex profile consisting of uniformly distributed hollow tetrahedrons allowing to reflect acoustic waves falling in all directions.EFFECT: improved noise suppression and structure reliability as a whole.1 dwg

Kochetov`s sound absorption device for industrial premises lining // 2627508
FIELD: machine engineering.SUBSTANCE: invention includes two oppositely arranged perforated walls between which a multi-layered sound-absorbing element is disposed. The latter is made in the form of five layers, two of which, adjacent to the walls are sound-absorbing layers made of materials with different density, and three central layers are combined. The axial layer is made in the form of rigid resonance plate with resonant holes that perform functions of Helmholtz resonators neck, and two symmetrically located and adjacent layers of reflective material of complex profile represent additional volume of Helmholtz resonators.EFFECT: noise supression efficiency is increased by extending the frequency range of the resonant operation modes which are provided by Helmholtz resonators built-in into the multi-layer sound-absorbing element.1 dwg

System and method for sound attenuation in vehicle to listen to instructions from mobile applications // 2627127
FIELD: radio engineering, communication.SUBSTANCE: method is performed by reproducing audio data in a vehicle from one of many different sources of audio data, reception of wireless signal in a vehicle from a mobile computing device representing audio instructions to be played in a vehicle, determining the degree of muting the audio data based on audio source, when the computer system of a vehicle reproduces audio data in a vehicle during receiving wireless signal from the mobile computing device, and muting the reproduced audio data and reproducing audio instructions.EFFECT: provision of vehicle audio data muting for audio instructions from mobile applications.20 cl, 4 dwg

Electronic device, server and method of control of such devices // 2627117
FIELD: information technology.SUBSTANCE: determining whether the received speech command corresponds to the speech recognition instruction included in the stored first list of speech recognition instructions. In response to determining that the received speech command corresponds to a speech recognition instruction included in the stored first list of speech recognition commands, the operation is performed in accordance with information about the control command corresponding to the speech recognition command. In response to determining that the received voice command does not correspond to speech recognition commands included in the stored first list of speech recognition commands, transmits the received voice command to the first server receiving a second list of speech recognition commands, updated by adding the transmitted voice commands and corresponding control commands the first list of speech recognition commands, from the first server, updates the stored first list of speech recognition commands to the received second command list of speech decoding and carry out the operation in accordance with the information on the management team, included in the second list.EFFECT: minimizing the time interval for recognizing the user's command and performing the operation.15 cl, 14 dwg

Decodor for generating audio signal with improved frequency characteristic, decoding method, coder for generating coded signal and coding method using compact additional information for choice // 2627102
FIELD: physics.SUBSTANCE: audio signal generating decoder with the improved frequency characteristic comprises: a property extracting unit from the base signal; an additional selection information extracting unit, associated with the base signal; a parameter generator for generating a parametric representation to estimate a spectral audio signal range with the improved frequency characteristic, not determined by the base signal, wherein the parameter generator is configured to provide a number of alternative parametric representations in response to the said property. The parameter generator is configured to select one of the alternative parametric representations in response to the additional selection information.EFFECT: creating an improved concept of coding, audio data decoding, that allows to reduce the additional information transfer speed for the directed decoding scheme.17 cl, 16 dwg

Device and method for improving perceived quality of sound reproduction by combining active noise cancellation and compensation for perceived noise // 2626987
FIELD: physics.SUBSTANCE: device includes an active noise cancellation module (110) for generating a noise cancelling signal based on an ambient audio signal, wherein the surrounding audio signal comprises portions of the noise signal, wherein the noise signal portions are the result of recording ambient noise. In addition, the device comprises a residual noise performance estimation module (120) for determining the residual noise characteristic, depending on the ambient noise and the noise cancellation signal. In addition, the device comprises a sensed noise compensation unit (130) for generating a noise-compensated signal based on the target audio signal and based on the residual noise characteristic. In addition, the device comprises a combining unit (140) for combining a noise cancellation signal and a noise compensated signal to produce an audio output signal.EFFECT: improving the perceived quality of sound reproduction by combining active noise cancellation and compensating the perceived noise, by improving the perceived quality of sound reproduction through headphones.15 cl, 23 dwg
Clog box // 2626982
FIELD: physics.SUBSTANCE: clog box includes a deck, side walls; a base; a back wall, the thickness of the deck is calculated from a low note to a high one according to the formula Txn, where T is the reference or effective thickness, n is the tempered semitone coefficient equal to 1.05946. The clog box is made of hardwood or of wood with a specific density greater than one, or of modified wood.EFFECT: invention allows creating musical instruments with a full octave range, which makes it possible to create musical compositions for clog boxes, increase in clog boxes' use in musical bands of all music genres.2 cl, 3 dwg
ethod of operator acoustic protection // 2626816
FIELD: construction.SUBSTANCE: method of operator acoustic protection includes equipping the operator's workplace with noise reduction means. The operator's workplace is placed between the acoustic screens and thus protects operator from direct sound, which is spread from the vibration equipment. To reduce sound vibration, the operator's workplace is equipped with a two-stage vibration protection system made in the form of a floor on an elastic base that contains a mounting plate made of concrete reinforced with vibration cusioning material, which is installed on the base plate of the inter overlapping with cavities through the layers of vibration cushioning material and waterproofing material with a gap relative to the bearing walls of the production room. The layers of the vibration cushioning material and the waterproofing material are made with a flange that fits to the bearing structures of the walls and the base bearing plate of overlapping. The cavities are filled with vibration cushioning material, for example foamed polymer, or polyethylene, or polypropylene. Above the equipment, spherical sound absorbers are installed, which are hinged to the metal structure. Each spherical absorber contains sound absorbers of active and reactive types, placed on a rigid frame, which is made of two parts. The lower, reactive part is made in form of spherical shape with an internal congruent spherical resonance cavity formed by a rigid continuous spherical shell with an equidistant perforated spherical outer shell which is connected to the upper active part which is made in the form of a rigid perforated cylindrical ring shell with a perforated cover and a solid base. The cavity of the cylindrical ring shell is filled with sound absorbing material, and the connection of the upper and lower parts of the sound absorber is performed by means of an elastic cushioning element, which allows to damp high-frequency oscillations. At least three rigid perforated cylindrical ring shells with a perforated cover and a solid base are located around the outer perforated spherical shell of the reactive part of the sound absorber, in its horizontal diametral plane. The cavity of cylindrical ring shell is filled with a sound-absorbing material.EFFECT: invention makes it possible to increase the efficiency of noise attenuation by increasing the sound absorption coefficient by increasing the sound absorption surfaces while maintaining the overall dimensions of the room.5 dwg

Device and method for generating coded signal or decoding encoded audio signal by using site with multiple overlap // 2626666
FIELD: physics.SUBSTANCE: device for generating an encoded signal comprises: a controller of the window sequence for generating information about the window sequence for framing an audio signal, wherein the information about the window sequence indicates the first window function for generating the first frame of the spectral values, a preprocessor for framing the second block of samples corresponding to the second window function and one or more third window functions, a spectrum converter for receiving the first and the second frames of the spectral values and for receiving the first and the second portions of the spectral values of the second frame, a processor for processing the first frame and the second frame to obtain encoded frames of an audio signal.EFFECT: providing an improved concept of audio encoding, decoding, which provides an improved efficiency of the device.41 cl, 44 dwg

Kochetov's spherical sound absorber // 2626472
FIELD: machine engineering.SUBSTANCE: spherical sound absorber contains the sound absorbers of active and reactive types, placed on the rigid frame. The frame is made of two parts, at that the bottom, reactive part is made in the spherical form structure with internal congruent spherical resonant cavity, formed by the rigid spherical solid spherical shell, connected with the top active part, that is made in the form of the rigid perforated cylindrical shell with the perforated cover and the solid base. The cavity of the cylindrical shell is filled with the sound absorbing material, and the connection between the sound absorber top and bottom parts is made by means of the elastic damping element, providing to damp the high-frequency oscillations. The element by which the frame is fixed to the required object, for example, the ceiling of the production room, is hinged to the perforated cylindrical shell perforated cover, and the spherical resonance cavity of the frame reactive part is rigidly connected by at least one sleeve with the axial hole, operating as the Helmholtz resonator neck, with external perforated spherical shell, and the space between them is filled with the sound absorber. At that the mineral wool on the basalt basis of the Rockwool type, or mineral wool of the URSA type, or basalt wool of the P-75 type, or the glass wool with the glass fiber lining is used as the sound-absorbing material for filling the cavity of rigid perforated cylindrical shells. The inner surfaces of the perforated cylindrical shells are lined with the acoustically transparent material, for example, the glass fiber of the EZ-100 type or the polymer of the "poviden" type.EFFECT: efficiency improvement of the noise suppression at high frequencies by introducing the volumetric cavities for Helmholtz resonators into the single piece sound absorber, that increase the efficiency at high frequencies.3 dwg

Kochetov's sound absorbing element // 2626471
FIELD: machine engineering.SUBSTANCE: sound-absorbing element contains the smooth and perforated surface, between which the multi-layer sound-absorbing structure is placed. The sound-absorbing structure is made in the form of the smooth and perforated surfaces, between which the sound-absorbing structure of complex shape is placed, which is the alternation of the solid and hollow sections. The solid sections are formed by smooth prismatic surfaces, located perpendicularly to the smooth and perforated surfaces and fixed to the smooth surface, and also by two inclined, relatively smooth prismatic surfaces, the surfaces of complex shape, having on the one hand the smooth surface, on the other hand the gear or wavy, or the shape of the surface, formed by the spherical sections. The teeth or protuberances tops are directed inward these surfaces, and the surfaces itself are fixed on the perforated surface. The relief sound-absorbing elements are attached to the smooth surface, for example in the form of the tetrahedra. As the sound-absorbing material, the material based on aluminium-containing alloys is used, followed by its filling with titanium hydride or air with the density within 0.5…0.9 kg/m3 with the following strength properties: the compressive strength within 5…10 MPa, the bending strength within 10…20 MPa, for example the foam aluminium. Or, as the sound-absorbing material of the second, softer layer, the mineral wool on the basalt basis of the Rockwool type, or mineral wool of the URSA type, or basalt wool of the P-75 type, or glass wool with the glass fiber lining, or the foamed polymer, for example, polyethylene or polypropylene is used. The material of the perforated surface is made of hard, decorative vibration cushioning materials, for example plasticate of "Agate", "Antivibrit", "Shwim" type. The inner surface of the perforated surface, facing the sound-absorbing structure is faced with the acoustically transparent material, for example, the glass fiber of EZ-100 type or the polymer of "Poviden" type. The hollow sections are filled with the sound-absorbing material, for example, with the construction foam. Inside the surfaces of the complex shape, having the smooth surface form the one side and the gear surface from the other side, the Helmholtz resonator is fixed, made in the form of the spherical surface with diametrically fixed bushings on it with resonant holes.EFFECT: increase of sound absorption efficiency and structure reliability.1 dwg
Single kochetov's sound absorber // 2626470
FIELD: machine engineering.SUBSTANCE: single sound absorber contains the rigid perforated frame, inside of which there is the sound-absorbing material. The frame is made from the lower part of the conical form with the cover and the upper part of cylindrical form, which is attached to the cover of the perforated frame lower part with the help of the vibration damping gasket, which allow to damp the high-frequency oscillations. The element used to attach the frame to the necessary item is hinged to the upper part of the cylindrical perforated frame, for example to the ceiling of the production room, and the cavities of the lower and upper parts of the perforated frame are filled with the sound-absorbing materials of various densities. At least one screw sound absorbing element of the single sound absorber is mounted around the upper cylindrical part of the perforated frame, it is made as the coil screw spring from the dense flameproof sound absorbing material. The screw sound absorbing element of the single sound absorber is made as the hollow screw sound absorbing element, made up by the outer and inner screw surfaces, forming the cavity. The space formed by the outer and inner helical surfaces is filled with sound-absorbing material. In this case, the cavity of the screw sound-absorbing element, formed by its external and internal screw surfaces, is filled with the sound absorbing mineral wool material on the basalt base like "Rockwool", or URSA mineral wool, or P-75 basalt wool, or glass wool with glass wool facing. The sound-absorbing material is faced with the acoustically transparent material, for example, the glass-like type EZ-100 or the polymer "poviden" type, and the outer and inner screw surfaces of the screw sound-absorbing element are made of the material, based on the aluminium-containing alloys, followed by filling them with titanium hydride or the air with density within 0.5…0.9 kg/m3 with the following strength properties: the compressive strength within 5…10 MPa, the bending strength within 10…20 MPa, for example foam aluminium. The outer screw surface of the screw sound-absorbing element is perforated. As the sound-absorbing material of the conical form frame lower part, the porous sound-absorbing ceramic material, having the bulk density of 500÷1000 kg/m3, and consisting of 100 parts by weight of perlite with the particles diameter of 0.5÷2.0 mm, 100÷200 parts by weight of one or more sintering materials and 10÷20 parts by weight of binding materials.EFFECT: noise reduction efficiency increase at low and medium frequencies.2 dwg
Single kochetov's sound absorber of combined type // 2626469
FIELD: machine engineering.SUBSTANCE: single sound absorber of the combined type contains the sound absorbers of active and reactive types, placed on the rigid frame. The frame is made of two parts. The bottom reactive part is made as rigid, hollow structure of cylindrical-and-cone shape, and the top active part is made as rigid perforated cylindrical shell with perforated cover and solid base. The cavity of the cylindrical shell is filled with the sound absorbing material, and the connection between the top and bottom parts is made by means of the elastic damping element, providing the damping of high-frequency oscillations. The element is hingedly connected to the perforated cover of the perforated cylindrical shell, using it the frame is fixed to the required facility, for example, to the ceiling of the production room. At least one screw sound absorbing element in the form of the cylindrical coil spring, enclosing the shell in the bottom reactive frame part, is mounted around the perforated cylindrical shell. The cylindrical part is made hollow in the form of the resonance Helmholtz suppressor with the resonator necks of different diameters, located in the cover and base of the hollow cylinder, and also on its lateral surface. The cavity of the conical part is the Helmholtz resonator with the neck, located at the base of the cylinder. At the same time, in the conical part cavity of the reactive sound absorber of cylinder-conical form, placed on the rigid frame and representing the Helmholtz resonator with the neck, located at the base of the hollow cylinder, there is the additional sound absorber, made in the form of the spherical surface, fixed by means of at least two braces with adjustable lengths, rigidly fixed on the hollow cylinder base. There is the gap between the spherical surface of the additional sound absorber and the internal conical surface of the reactive sound absorber conical part, the value of which is determined, depending on the required degree of the noise reduction level. The outer screw surface of the screw sound-absorbing element is perforated, and the spherical surface of the additional sound absorber, fixed by at least two length-adjustable braces on the base of the hollow cylinder is perforated, and the cavity of the additional sound absorber is filled with the sound absorbing material.EFFECT: efficiency improvement of the noise suppression at high frequencies by introducing the volumetric cavities for Helmholtz resonators into the single piece sound absorber, that increase the efficiency at high frequencies.1 dwg

Training device for bell-tolling // 2626216
FIELD: Field: training.SUBSTANCE: frame is made of two vertical racks installed on the base, and three crossbars fixed on the vertical racks at different levels. The pedal connected to the tongue of the largest idiophone is additionally mounted on the base, as well as a column connected to the idiophone tongues located on the middle crossbar. The column is connected to the lower crossbeam of the Y-shape bar at one point - to the column and in the other two - to the lower crossbar.EFFECT: collapsible design of the device allows bell-tollers training and improvement of bell-tollers skills when using in small areas.6 cl, 2 dwg

Per-segment spatial audio installation to another loudspeaker installation for playback // 2625953
FIELD: physics.SUBSTANCE: device is proposed for adaptation of the spatial audio signal intended for initial speaker installation, to the speaker installation for playback, which differs from the reference loudspeaker installation. The device comprises a unit of decomposing to the direct sound and the surround sound, which is adapted to decompose the channel signals in the reference loudspeaker installation segment to the components of the direct sound and the surround sound, and to determine the arrival direction of the direct sound components. The unit of presenting the direct sound receives the loudspeaker installation information for the playback and adjusts the direct sound components using the loudspeaker installation information for the playback so that the perceived arrival direction for the direct sound components in the loudspeaker installation for the playback is identical to the arrival direction for the direct sound components.EFFECT: preserving the audio spatial image, while resetting the audio signal to another loudspeaker installation.16 cl, 9 dwg

Device and method for generating signal with improved spectrum using limited energy operation // 2625945
FIELD: physics.SUBSTANCE: device for generating a signal with an improved spectrum comprises: a signal generator for generating an extension signal from the main signal, wherein the extension signal comprises a frequency expansion range not included in the main signal, in which the extension signal timing portion comprises sub-range signals for a plurality of sub-ranges; a synthesis filter bank for generating the signal extended by frequency, using the extension signal, wherein the signal generator is configured to perform the energy restriction to ensure that the signal extended by frequency, obtained by the synthesis filter bank, is such that the energy of the more high-frequency range is at most equal to the energy in the low- frequency range or is greater than the energy of the high-frequency range, at most by the predetermined threshold.EFFECT: improving the quality of fricatives in the audio signal.18 cl, 18 dwg

Coder, decoder and methods of scale transformation dependent on signal in spatial audio object coding // 2625939
FIELD: physics.SUBSTANCE: decoder for generating an output audio signal comprising one or more audio output channels from the downmix signal. The decoder comprises the first analysis module for converting the downmix signal to obtain the first converted downmix containing a plurality of channels of the first sub-range. The decoder comprises the second analysis module for generating the second transformed downmix by converting, at least, one of the channels of the first sub-range, to obtain a plurality of channels of the second sub-range, wherein the second transformed downmix includes the first sub-range channels, that were not converted by the second analysis module, and the channels of the second sub-range. The decoder comprises an upmix configured to upmix the second transformed downmix based on the parametric additional information on the said one or more audio object signals, to obtain an output audio signal.EFFECT: improving the encoded audio signal quality.16 cl, 22 dwg

Principle for coding mode switch compensation // 2625561
FIELD: information technology.SUBSTANCE: in response to a switch event, a temporary smoothing and/or mixing is implemented at transition between the first temporary portion of information signal before a switch event and the second temporary portion of information signal after a switch event in high-frequency spectrum band. Response is given to switching of one or more of: an audio encoding mode in the full bandwidth to a BWE audio coding mode, and a BWE audio coding mode to an audio encoding mode in the full bandwidth, wherein the high frequency spectrum band overlaps a portion of BWE-extension spectrum of a BWE audio encoding mode and a portion of spectrum of transformation or linear prediction encoding with a portion of audio encoding mode spectrum in the full bandwidth.EFFECT: increased audio quality when switching between different encoding modes with different bandwidths by smoothing and/or mixing sound at appropriate transition.16 cl, 21 dwg

Device and method for encoding or decoding audio signal with overlap depending on transition location // 2625560
FIELD: physics.SUBSTANCE: device comprises: a controlled framing module for framing an audio signal to provide a sequence of the sample framed blocks; a converter for converting the sequence of the sample framed blocks into the spectral representation comprising a sequence of the spectral value frames; a transition location detector to identify the transition location in the anticipation transferring area in the frame; and a controller to control the controlled framing module, to apply a particular window having a predetermined overlapping length, to the audio signal in response to the identified transition location, where the controller is configured to select the particular window of the group of, at least, three windows, including the first window having the first overlapping length, the second window having the second overlapping length, and the third window having the third overlapping or non-overlapping length.EFFECT: providing an improved audio encoding, decoding, providing the increase of the device performance.35 cl, 44 dwg

Audio processing system // 2625444
FIELD: physics.SUBSTANCE: audio processing system comprises a pre-processing component, that receives the quantized spectral components and performs the inverse quantization, thereby obtaining a time domain representation for the intermediate signal, a processing stage in the frequency domain, configured to provide the time domain representation to the processed audio signal, and a sampling rate converter providing the reconstructed audio signal sampled with the target sampling frequency. Corresponding internal sampling frequencies of the time domain representation for the intermediate audio signal and the time domain representation for the processed audio signal. In specific embodiments, the processing stage comprises a parametric upmixing stage, which operates in two different modes, and is associated with the delay stage, which provides a constant total delay.EFFECT: sampled sound wave restoration in the single-channel, stereo or multi-channel format.15 cl, 34 dwg, 4 tbl
ethod of acoustic tomography system fields in the atmosphere, the oceans and crust of different physical nature in the marine environment // 2624607
FIELD: physics.SUBSTANCE: method of hydroacoustic tomography of atmospheric, oceanic and crustal fields of various physical nature in the marine environment, including the formation of low-frequency radiating and receiving channels of the measuring system with their acoustic transducers, placement of acoustic transducers on opposite boundaries of the controlled medium, sounding of the medium by low-frequency luminescent signals of a stabilized frequency and the formation in it of a nonlinear interaction working zone and a parametric preprocess the acquisition of transformed luminescent waves, their amplification in the nonlinear conversion band, narrowband spectral analysis, and the separation of the discrete components of the measured data waves. The radiating unit is formed of three acoustic transducers which are located on the axis of the underwater sound channel (USC), above and below the axis of the USC respectively, and the receiver unit is formed of three linear discrete receive antennas including n elements (hydrophones) each that are horizontally placed in direction of the emitting acoustic transducers, respectively. The working zone of nonlinear interaction and parametric conversion of acoustic luminous and measurable information waves is formed between the radiating and receiving blocks of three emitting transducers and three linear discrete receiving antennas. Luminal acoustic signals are multichannelly receiving previously amplified and by multiconductor cables transmitting to the receiving channel of the measuring system, in which signals are sequentially summed at each cycle of selective connection of discrete reception antennas and a cyclic shift of their elements (hydrophones), form continuous signals which are then amplified in the band and a parametric frequency-time conversion is transferred to a high-frequency region and narrow-band spectra are measured, then isolated spectra of the upper and (or) bottom side strip form and are received in the 2D spectra, and (or) 3D format signals. The operation of narrowband spectral analysis, the formation and presentation of the spectra of measured information fields in 2D and/or 3D format is synchronized with the selective connection mode of discrete receiving antennas and cyclic switching of their elements (hydrophones), as well as the operation of frequency-time transformation (transfer) of multichannelly received signals into the high-frequency region and the operation of forming continuous signals. The spectra of the measured information fields are recorded and transmitted via the radio link to the information and analytical pathway, where the attributes of the measured information fields of the atmosphere and (or) the ocean and/or the earth's crust are determined, as well as the characteristics of their space-time dynamics, time and parametric conversion of received signals in the receiving path and information coming from the Regional Information Center and / or the GLONASS system.EFFECT: provision of long-range parametric reception of information fields of various physical nature in the marine environment, the formation and presentation of their spatial spectra in 2D and 3D format, and control of their spatial-temporal dynamics in the water areas, tens of hundreds of kilometers long.6 cl, 13 dwg

Watermark signal generation and embedding watermark // 2624549
FIELD: physics.SUBSTANCE: watermark signal generator generating a watermark signal carrying the watermark data for hidden embedding into an audio signal in the reduction of the watermark signal and the audio signal. The watermark signal feeding circuit includes a psychoacoustic processor, that determines the audio signal masking threshold, and a modulator, that generates a watermark signal based on the superposition of the reference forming functions mutually spaced by the temporary time reference amount of the watermark data discrete-time representation, from which each function, forming the time reference, has an amplitude weighted by using the respective time reference of the discrete-time representation multiplied by the corresponding amplitude weight depending on the masking threshold, wherein the time reference is shorter than the time interval, for which the time reference forming functions are defined; and an individual amplitude weight depends on the time reference of the discrete-time representation bordering this time reference.EFFECT: optimal balancing the ability to calculate the watermark signal and the lack of its effect on hearing.12 cl, 39 dwg

Piano // 2624346
FIELD: physics.SUBSTANCE: piano has 88 keys and a corresponding string clothing. It has 38 black and 50 white keys. The repeating element in the keyboard is a sequence of 16 keys - nine basic white and seven additional black ones. The keyboard has a form shown in Fig. 1, the piano sound range is of 68.303 Hz to 2959.988 Hz. The basis of the piano scale is the frequency of 369.997 Hz, corresponding to the note F-sharp of the classical scale.EFFECT: ability to create and apply new musical modes that can not be realized in the traditional 12-step evenly-tempered scale of the classical piano, the possibility of obtaining halftones, which in absolute sound are smaller and thinner than the halftones of the traditional 12-step one.2 cl, 2 dwg, 3 tbl

Device and method for generation of expanded by signal frequency, using the formation of extension signal // 2624104
FIELD: radio engineering, communication.SUBSTANCE: device for generating a signal with an improved range comprises: a calculator to calculate a value, which describes the energy distribution on the frequency in the main signal; and a signal generator for generating expansion signal comprising a frequency band expansion is not included in the main signal from the main signal. A signal generator configured to generate extension signal or the main signal so that the spectral envelope of the extension signal or the main signal dependent on the value describing the distribution of energy versus frequency in the main signal.EFFECT: reduction in the required amount of side information as compared with full parametric description of the missing frequencies.17 cl, 18 dwg

Audio encoder and audio decoder with metadata information on program or substreams structure // 2624099
FIELD: information technology.SUBSTANCE: buffer memory is a non-volatile carrier configured to store at least one frame of encoded audio bitstream. Wherein encoded audio bitstream contains audio data and a metadata container. Metadata container includes a header and one or more metadata contents after a header. One or more metadata contents comprise dynamic range compression (DRC) metadata, and DRC metadata represents or contains profile metadata indicating whether DRC metadata contain control values of dynamic range compression for use in dynamic range compression in accordance with one compression profile for audio content. If profile metadata indicate that DRC metadata contain DRC control values for use in dynamic range compression, DRC metadata also contains DRC control values set generated in accordance with a compression profile.EFFECT: increased efficiency of detection and correction of errors of audio stream metadata identification due to presence of audio stream content metadata in audio stream.14 cl, 8 dwg, 2 tbl

ethod and device for compressing and restoring representation of high-order ambisonic system for sound field // 2623886
FIELD: physics.SUBSTANCE: HOA representation is analyzed for the presence of the dominant sound sources, and their directions are evaluated. The HOA representation is then decomposed into a number of dominant directional signals and a residual component. This residual component is transformed into a discrete spatial domain in order to obtain functions of common plane waves in uniform sampling directions that are predicted from dominant directed signals. Finally, the prediction error is converted back to the HOA domain and represents the residual surrounding HOA component, for which the order is reduced, followed by perceptual coding of the dominant directional signals and the residual component.EFFECT: improving the quality of the compressed representation of the HOA sound field.14 cl, 8 dwg

Resonant acoustic absorber by kochetov // 2623742
FIELD: machine engineering.SUBSTANCE: resonant acoustic absorber comprises a rigid frame consisting of an upper active part and a lower reactive part. The reactive part is made in the form of at least three coaxial and axisymmetrical resonant cylinders with their cavities being fitted by holes of different diameter serving as Helmholtz resonator necks. Supporting disks set at the cylinder ends connect the latter to each other in rigid and leaktight manner forming the reactive part of the rigid frame of the acoustic absorber. The upper active part is made in the form of a rigid perforated cylindrical shell with a perforated cover and a solid base. The cavity of the cylindrical shell is filled with sound absorbing material. The connection of the top and bottom parts is made by the resilient damping element ensuring dampening of HF oscillations. To the perforated cover of the perforated cylindrical shell the element is hingedly connected, using it the framework is secured to the required facility. Around the perforated cylindrical shell there is at least one screw sound-absorbing element, made in the form of a cylindrical coil spring surrounding the shell, and supported by a support disk connected to the reactive part of the sound absorber. The inner walls of axisymmetrically located resonant cylinders with their cavities being fitted by holes of different diameter serving as Helmholtz resonator necks are lined with a sound-absorbing material.EFFECT: invention increases the efficiency of noise control at high frequencies.1 dwg
Acoustically comfortable room with noise protective equipment // 2623741
FIELD: construction.SUBSTANCE: acoustic design of the industrial facilities contains the frame of the workshop, the walls carrying the floor and ceiling fences, which are lined with sound-absorbing structures, window and door openings, as well as piece sound absorbers containing the frame in which the sound-absorbing material is located and installed above the noisy equipment. The floor is made on an elastic foundation and includes a mounting plate made of concrete reinforced with vibration damping material, which is mounted on the base intermediate overlapping slab with cavities through the layers of the vibration damping material and the waterproofing material with the gap relative to the bearing walls of an industrial premise. The base slab cavities are filled with a vibration damping material, such as foamed polymer, and the single-piece sound-absorbing device is manufactured at least in a shape of three-sided pyramidal structure consisting of inclined facets, which are connected to form the top by the fasteners. As the base of a three-sided pyramid the frame of the room is used, to which perforated sloping facets are attached via vibration cushioning elements by means of the fasteners and elastic ties. Elastic ties are located inside the frame in a plane perpendicular to the overhead frame of the room. One end of the ties is attached to the hooks fixed to the frame, and another one - to the fastening elements, tightening the sloping facets, on the inner side of which the sound-absorbing non-combustible material, wrapped in an acoustically transparent material, is attached. Inside the cage between the layers of the sound absorbing material there is an air cavity.EFFECT: improved efficiency of noise suppression.9 dwg
ethod of processing advertising messages // 2623671
FIELD: information technology.SUBSTANCE: by means of the invention, the tagged advertising object is recognized as text and/or image and stored on the user's device and/or in the user account in the Internet cloud.EFFECT: increasing the effectiveness of the impact of the advertising message, improving the perception of the consumer and ensuring the possibility of doing marketing research.1 dwg

Device for the manufacture of the entwined piano string and method of manufacture of the entwined piano string with the use of the acoustic control of the kern tension volume before production of the insert // 2623516
FIELD: physics.SUBSTANCE: device contains two support-power brackets 16, 17 with fasteners 18, 19. An electric motor 20, 21 connected to the corresponding spindle 22, 23 is fixed to the console protrusion of each bracket 16, 17. At the end of one spindle 22, there is a device 26 for fixing one of the ends of the core 30, and at the end of the other spindle 23 there is a tensioning mechanism 28 with a device 29 for securing the other end of the core 30. The device also comprises a power supply and motor control system 20, 21, which provides synchronous rotation of the electric motors 20, 21. The brackets 16, 17 are fixed to the opposite edges of the bearing surface of the object 36 used as a frame. The core 30 is pre-tensioned by means of a tensioning device 28, and two pins 43, 44 are spaced between the core 30 and the leading edge of the supporting surface at a distance from each other equal to the length of the working portion of the string. The core 30 oscillates and strengthens its tension until it achieves a sound pitch of the pitch level of the reference tone produced by it, the frequency of which corresponds to the frequency of the core oscillations, stretched with the force calculated for the production of this string. Next, the pushers 43, 44 are removed, the electric motors 20, 21 are turned on, which synchronously drive the spindles 22, 23 and the core 30, and feed the cores 30 with a bender to wind it.EFFECT: design reliability.3 cl, 5 dwg

System and method for upper airways performance obtaining using speech characteristics // 2623129
FIELD: medicine.SUBSTANCE: system to obtain characteristics of the patient's upper airways anatomical parameter by analyzing the spectral properties of an utterance, comprises a mechanical connector including means for patient's jaws position restriction, means for utterance recording, and processing means for determination of the anatomical parameter of the upper airways based on the recorded utterance and recorded utterance comparing to the threshold value. The system is used as a diagnostic tool for obstructive sleep apnea assessment. At that, patient's jaws position is restricted, an utterance is recorded, the recorded utterance is compared with the threshold value and the said anatomical upper airways parameter is determined by the recorded utterance and recorded speech fragment comparing to the threshold value.EFFECT: improved accuracy of upper airways anatomical parameters measurement due to jaws fixation in position and reduced variability of spoken sounds.16 cl, 4 dwg
Acoustic construction for industrial facilities // 2622936
FIELD: construction.SUBSTANCE: acoustic construction for industrial facilities contains the frame of the workshop, window and door openings, walls with acoustic fences, ceiling with acoustic lining, floor covered with vibration cushioning material, piece sound absorbers comprising the frame where sound absorbing material is located, and mounted above the noisy equipment, which is mounted on the antivibration bearings. The window openings comprise vacuum sound-proofing glass units. The acoustic fence of each wall contains a smooth and perforated surface, between which a multi-layered sound-absorbing structure of complex shape is located, which is an alternation of solid sections and hollow sections. The solid portions are formed by smooth prismatic surfaces arranged perpendicular to the smooth and the perforated surfaces and fixed to the smooth surface, as well as by two surfaces of a complex shape, connected therewith and inclined with respect to the smooth prismatic surfaces, on one side the surfaces of a complex shape have smooth surface, on the other side sound-absorbing construction has scalloped or undulating surface shape, or surface shape formed by spherical sections. Wherein, the tops of the teeth or protrusions face inside these surfaces, and the surfaces themselves are fixed on the perforated surface, texturized sound-absorbing elements are fixed on the smooth surface, for example, in the form of tetrahedra.EFFECT: improved efficiency of noise suppression.3 dwg
Acoustic construction for industrial facilities // 2622935
FIELD: construction.SUBSTANCE: acoustic construction for industrial facilities contains the frame of the workshop, window openings and acoustic wall fences, piece sound absorbers mounted above the noisy equipment, which is mounted on the antivibration bearings. The window openings comprise vacuum sound-proofing glass units. The acoustic wall fences are made in the form of noise-attenuating panels which consist of a frame made in the form of a parallelepiped formed by the front and back walls of the panel, each of which is U-shaped. Slot perforation is made on the front wall and its perforation coefficient is equal to or exceeds 0.25, and lateral edges increase the panel rigidity on the whole. Panel walls are fixed to each other by a vibration cushioning lids, and sound absorbing element is located between the front and back walls of the panel, which is presented by plates made of basalt-based mineral wool of "Rockwool" type or mineral wool of "URSA" type. The front and back walls of the corrugated material are made of stainless steel or a galvanized steel sheet 0.7 mm thick with a polymer protective and decorative coating such as " Пурал" 50 mcm thick or " Полиэстер" 25 mcm thick, or of an aluminium sheet 1.0 mm thick and coating 25 µm thick. The ratio of the height h of the frame to its width b is in an optimal value ratio: h/b=1.0…2.0. The ratio of the thickness s' of the assembled frame to its width b is in an optimum value ratio: s'/b=0.1…0.15. The ratio of the thickness s of the sound absorbing element to the thickness s' of the assembled frame is in the optimum value ratio: s/s'=0.4…1.0. The vibration cushioning lids fixing the panel walls are made of elastomer, polyurethane foam or polyethylene foam, lignocellulosic, chip wood material, or gypsum-asbestos cardboard, or an elastic sheet vibration-absorbing material with an internal loss factor of at least 0.2, or a composite material, or a plastic of "Агат", "Антивибрит", or "Швим" type. The piece sound absorbers mounted above the noisy equipment are made in the form of a frame which is made spherical with an internal spherical resonance cavity congruent to the frame, formed by a rigid continuous spherical shell, equidistant to the outer perforated spherical shell. Space between spherical shells is filled with sound absorbing material, and connection of the outer perforated spherical shell with the object, for example with the ceiling of industrial facility, is made using elastic damped element which allows to damp high frequency oscillations and is pin-connected with the suspension, made in the form of a rod, one end of which is connected with a pin which is installed on the elastic damped element, and the other is connected to the ring, intended for its fixation on the object. The spherical resonant cavity is rigidly connected by at least one sleeve with an axial hole serving as the neck of the Helmholtz resonator, with an outer perforated spherical shell, and the space between them is filled with a sound absorber.EFFECT: improved efficiency of noise suppression.3 dwg
Sound-absorbing lining // 2622934
FIELD: construction.SUBSTANCE: sound-absorbing lining is made in the form of a rigid and perforated walls, between which a multilayer sound-absorbing element is located. The multi-layer sound-absorbing element is made in the form of two layers, one of which, adjacent to the rigid wall, is sound-absorbing, and the other, adjacent to the perforated wall, is made of a sound-reflecting material of a complex profile, consisting of uniformly distributed hollow tetrahedra, allowing to reflect acoustic waves in all directions. The perforated wall has the following perforation parameters: hole diameter - 3÷7 mm, perforation percentage 10%÷15%, wherein the holes can be made in the form of the holes with round, triangular, square, rectangular or diamond-shaped profile. In the case of non-round holes the conditional diameter is taken as equal to the maximum diameter of the circle inscribed in the polygon. Plates made of basalt-based mineral wool such as "Rockwool", or "URSA" mineral wool, or basalt wool P-75, or glass-wool with a woven glass liner are used as a sound-absorbing material. The sound-absorbing element is lined with acoustically transparent material over the full surface, such as glass fabric EZ-100 or polymer "poviden". A rigid porous material can be used as a sound-absorbing material, such as foam aluminium or cermet, or shell stone with a porosity degree in the range of optimum values: 30÷45%, or metal PU foam, or material in the form of compacted chippings of rigid vibration cushioning materials, such as elastomer, polyurethane, or plastic like "Агат", "Антивибрит", "Швим". The size of chipping fractions lies in the optimal range of values: 0.3…2.5 mm, porous mineral piece materials can also be used, such as pumice, vermiculite, kaolin, slags with cement or another binder, or synthetic fibers. The surface of the fiber sound absorbents is treated with special porous air-permeable paints, such as Acutex T, or is covered with air-permeable fabrics or non-woven materials, such as frost cloth. Material based on aluminium-containing alloys is used as a sound-reflecting material, followed by filling them with titanium hydride or air with a density within 0.5…0.9 kg/m3 with the following strength properties: compressive strength within 5…10 MPa, bending strength within 10…20 MPa, such as foam aluminium, or soundproofing plates based on a glass staple fiber of "Шумoctoп" type with a material density of 60÷80 kg/m3, or a material based on magnesia binder with reinforcing fiberglass or glass wool is used as a sound-reflecting material. The layer adjacent to the perforated wall is made with a perforation from the sound-reflecting material of a complex profile, consisting of uniformly distributed hollow tetrahedra.EFFECT: increased sound-proofing efficiency and design reliability in general.1 dwg

Audio encoder and decoder for encoding on interleaved waveform // 2622872
FIELD: physics.SUBSTANCE: these methods and devices for encoding and decoding audio signals, in particular, the method for endecoding includes receiving the encoded signal on the waveform, having a spectral content corresponding to the subset of the frequency range above the transition frequency. The encoded signal on the waveform is interleaved with the parametric high frequency audio signal reconstruction above the transition frequency, thereby an improved reconstruction of the audio signal high-frequency bands is achieved.EFFECT: providing an improved reconstruction of the transient processes and the tonal components in the high-frequency bands.25 cl, 9 dwg

Effective pre-echo attenuation in digital audio signal // 2622863
FIELD: radio engineering, communication.SUBSTANCE: method comprises: decoded signal decomposition to at least two subsignals according to a predetermined decomposition criterion; calculating attenuation coefficients relating to a sub-signal and a discrete value from a predetermined pre-echo zone; pre-echo attenuation in the pre-echo zone of each sub-signal by applying attenuation coefficients to these sub-signals; receiving the signal subjected to attenuation by combining the sub-signals subjected to attenuation.EFFECT: reduction of pre-echo irritating effect.15 cl, 13 dwg

Device and method for encoded signal processing and encoder and method for encoded signal generating // 2622860
FIELD: information technology.SUBSTANCE: encoded signal comprises an encoded audio signal with information regarding to pitch delay or pitch gain, and a postfilter management parameter for low audio frequencies, comprising: an audio signal decoder for encoded audio signal decoding using information concerning pitch delay or pitch gain to obtain a decoded audio signal; a controlled post-filter of low sound frequencies to filter the decoded audio signal to obtain a processed signal, wherein a controlled post-filter of low sound frequencies has a variable characteristic of post-filter of low sound frequencies controlled by a management parameter of a post-filter of low sound frequencies; and a controller for setting of a variable characteristic of post-filter of low sound frequencies according to a management parameter of a post-filter of low sound frequencies, that is included to an encoded signal.EFFECT: improved quality of encoded audio signal.18 cl, 13 dwg

Transmitter of activation signal with the time-deformation, acoustic signal coder, method of activation signal with time deformation converting, method of acoustic signal encoding and computer programs // 2621965
FIELD: information technology.SUBSTANCE: encoder comprises the window function controller (504), window organizing unit (502), device for time-deformation (506) with the final functional quality control ability, time / frequency inverter (508), TNS stage (510) or encoder quantizer (512 ), window function controller (504), device for time-deformation (506), TNS stage (510) or an additional noise filling analyzer (524) are controlled by the results of the signal analyzing obtained by time-deformation analyzer (516) or the signal categorizer (520). The decoder applies the noise filling operation using the adjusted noise filling estimation depending on a harmonic or speech sound signal characteristic.EFFECT: increased efficiency of coding, decoding of the acoustic signal with the harmonic or speech content.8 cl, 37 dwg

Way of estimating the instantaneous frequency of the voice signal in local maximum points // 2621647
FIELD: physics.SUBSTANCE: frequency with strobing f and amplitude of an audio signal are injected into computer memory either by using a microphone and standard input, or by reading the file, the audio signal. Producing finding points of local maximum amplitude of speech signal. Evaluating the magnitude of , where n is the position of the local maximum. The counting of instantaneous frequency is performed at the specified point by the formula w=ƒ*argcos(Val). The position of the local maximum and the estimated instantaneous frequency are estimated in the format n, w.EFFECT: decreasing the number of calculations for estimating the instantaneous frequency at local extremum points.2 dwg

Adaptive tone quantization of low complexity audio signals // 2621003
FIELD: physics.SUBSTANCE: audio encoder comprises: a framing device configured to extract frames (F) from the audio signal (AS); a quantization module configured to display the spectral lines (SL1-32) of the spectrum signal (SPS) extracted from the frame (F) of the audio signal (AS), in the quantization index (I0, I1). The quantization module has a dead zone (DZ), in which the input spectral lines (SL) are displayed in the zero quantization index (I0); and a control device configured to modify the dead zone (DZ). The control device comprises a tonality calculating device configured to calculate a single value (TI5-32) indicating the tone for one spectral line (SL1-32) or for one group of the spectral lines (SL1-32). The control unit is configured to modify the dead zone (DZ) for one said spectral line (SL1-32) or one said group of the spectral lines (SL1-32) depending on the respective values (TI5-32) of specifying the tonality.EFFECT: providing the improved concepts for adaptive quantization of the audio signals.17 cl, 2 dwg
 
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