Method and system for transmitting digital information via broadcast channel

FIELD: radio engineering, communication.

SUBSTANCE: present invention relates to transmission of digital messages embedded in the audio program of analogue radio broadcast stations. The method of transmitting digital information over a broadcast channel includes decoding a resultant audio signal with simultaneous transmission and repeating the embedding of an encoded information message until successful restoration of said message during said decoding.

EFFECT: enabling transmission of a large amount of information without loss of subjective sound quality over a minimal time.

9 cl, 6 dwg

 

The proposed technical solutions relate to methods and apparatuses for broadcast, and in particular to a technique of transmission of digital messages that are embedded within audioprogram of analog radio broadcast.

Though recently developed digital broadcasting (appeared appropriate standards, methods and devices for digital data transmission, analog broadcasting system on the basis of amplitude (AM) and frequency modulation (FM) are still very popular due to some advantages, such as:

(1) simplicity and therefore low cost of implementation as the transmitting and receiving equipment;

(2) the availability of a huge number of devices for the reception of the analog broadcasting signals (especially for standards WCH);

(3) high quality audio programs (for FM stereo broadcast).

It is worth noting that until now (2010) none of the countries, even among the most advanced and technologically developed, refused completely from analog broadcasting. Given these circumstances, one can expect that analog broadcasting will continue to be one of the most basic ways sound broadcasting for decades.

However, analog broadcasting systems still inherent disadvantages and limitations - it is, above all, the lack of integrated digital service�in, such as the transmission of multimedia content (photos, formatted text, web services), already familiar to and expected by the user of a modern digital instrument.

Currently, there are options to extend the functionality of analog broadcasting.

Known by the company Nokia, the method of transmission of digital information, together with the transfer of the primary audio in the analog broadcasting system (Nokia Visual Radio Visual Radio", [1]) for the transmission of multimedia content (web pages, graphics, etc.) simultaneously with the audio signals. In accordance with the concept of "Visual Radio" additional multimedia information associated with the primary audio, pre-loaded on a centralized server system "visual radio", then this information at certain points in time (sync with audio program) broadcast by the network the mobile Internet via the mobile operator to the mobile phone of the user (Fig.1). Thus, the user in conjunction with the audio program transmitted over a single communication channel, receives associate with her digital information on another communication channel.

This method has several disadvantages:

(1) must be having an active connection to the mobile Internet, which is not always technically op�audino, therefore, the scope of application of this technology is limited to mobile phones;

(2) the consumption of mobile Internet traffic, which requires payment from the user (listener);

(3) simultaneous download channels mobile Internet the same data by each user, which leads to inefficient resource consumption of the mobile operator and even overload the network with a large number of users (for example, at mass events, such as popular sporting events, etc.).

Another option for transferring digital information in a radio broadcasting channel is the digital broadcasting system (Radio Data System - RDS) [2] for radio stations with FM modulation, operating in the range 87.5-108 MHz, including the source of the audio program, connected to the same input module insert connected to the transmitter for broadcast, and the source information messages, is connected to another input of the module insertion through the driver (coder) information messages (Fig.2).

Such systems are used to transmit the base station information (e.g. station name), as well as other current short text information (e.g., name of the playing song) because, as in traditional methods of digital broadcasting, using a constant speed transmission which is inefficient � this case, since this speed should be minimal, designed for the worst case to avoid loss of messages. In this regard, the use of the system for transmitting multimedia data, such as web pages, limited by low bit rate, high redundancy Protocol, as well as the absence of a mechanism of correction of transmission errors.

In addition:

for RDS uses a separate frequency resource which could be more effectively used for transmission of other programs or data;

- data transmitted via RDS, not synchronized with the main program, which creates difficulties when the relay and the organization of the delivery channel signal from the radio Studio to the transmitter;

- for transmitting RDS signals necessary radio equipment, which requires economic costs of calibration, certification and prevention. In addition, the radio must support RDS decoding at the hardware level, and if it is not provided by the manufacturer (e.g., while minimizing the cost of the receiver), then there is no way to decode RDS data programmatically;

- the inability to use in AM radio broadcasting, where you cannot use additional subcarriers.

The closest analogue of the claimed method of transmission of digital information in the channel� broadcasting is a method of transmitting digital information in the channel radio (EP 9700338 Al, H04H 1/00, publ. 12.09.1997), which includes encoding an information message, then convert it into an audio signal using a psychoacoustic model, and the original audio signal transform, keeping the audio information links into. For implementing the method using the system, which is the closest analogue of the claimed system for transferring digital information in a radio broadcasting channel that includes a module insertion, to the first input of which is connected to the source of the audio program, to a second input of the shaper of information messages, the entrance of which is connected to a source of informational messages. Using the output of the module inserts transmit the combined audio signal to a radio transmitter.

Despite the fact that using the method disclosed in EP 9700338, you can insert digital information directly into an audio track of the broadcast signal, the volume of such information is very limited and is intended for insertion in audio signal of a certain digital code for identifying a broadcasting channel. This code usually does not change over a sufficiently long time interval, thus, equivalent to the bandwidth of such a "communication channel" is very limited (a few bits per second or even less). Of course, you could change the data being transmitted (code) h�cut some pre-defined time intervals, and thus, to ensure the transmission of large amounts of information, but such method and system are unsuitable for practical applications for the reason that the reliability of decoding of the transmitted signal depends strongly on the current spectral-temporal characteristics of the source audio signal. For example, the presence of small breaks in the fragment of an audio signal or a localization signal spectrum in a narrow band of frequencies, leads to the fact that decoding is inserted into this piece of information may be impossible or will be performed with a high probability of error. To insert a single code-the identifier of the channel, this situation is not a serious problem since the same code can be decoded on the next part of the audio signal or at a later time. However, transmission of large data packets such situation is critical, and the lost data block cannot be recovered. The opportunity to request retransmission of lost data at the receiving device does not exist, as in the system of information transfer is carried out only in one direction.

The purpose of this application is to provide a method and system for transferring digital information in a radio broadcasting channel, which allows to simulate (imitate) on the transmitting side, the receiving sums�rnogo audio (from the original audio signal and a coded information message) and extract the source information message, what will determine the date of delivery to the user information transmitted messages when initially selected redundancy coding, reducing the time of transfer of the information message, to increase the bandwidth of the audio channel for the transmission of large amounts of information messages.

The aim is achieved in a method of transmitting digital information in a radio broadcasting channel, comprising the simultaneous transfer of information messages and audio, this was done using the coding information of the message, paste in the source audio signal converted into the audio signal of the encoded information message using a psychoacoustic model, the transfer received total the audio channel of the radio. Simultaneously with the transfer is carried out, the total decoding of the audio signal to restore the transmitted information message, and inserting the encoded information message is repeated until a successful restore you mentioned decoding.

Advantageously, in the method for re-insertion into the original audio signal and increasing the redundancy in the encoding of a message.

Advantageously, in the method before decoding the combined audio signal is pre-distorted to simulate the passer�message on his radio.

The insert is advantageously carried out by replacing parts of the original audio signal with an audio signal coded with an informational message.

The insert advantageously be achieved by the addition of the source audio signal by an audio signal from the encoded information message.

The objective is also achieved in a system for transmitting digital information in the channel broadcasting (hereinafter, the transmission system) that contains the source of the audio program, the source information messages, driver information messages, a device (module) insertion of a message into the audio transmitter and receiver, driver information messages re-transmission of the encoded information message to the device inserts and the introduction of the decoder information signal, is arranged to form a signal for changing informational messages. The source of the audio program connected to the first input of the insertion device, the source information message connected to the first input of the shaper of information messages, the output of which is connected to the second input of the insertion device, the output of which is connected to the radio transmitter, and a decoder connected to the second input of the shaper of information messages. In the case when the decoder is not restored �eredane information message, driver re-sends it to the insertion device for the second transmission.

Thus, the idea of this approach is that the driver transmits the information message to the device insertion to continue embedding in the audio signal radio programs of digital information, one way or another associated with the same informational message (in the simplest case - just repeats the same message) as long as it is with high degree of probability delivered to potential recipients. The system allows you to apply the minimum redundancy encoding of the message and to reach the highest possible speed of transmission of digital information. In this case, use the heterogeneity of sound programs virtually any radio station. Typically, the audio program includes music of various styles, speech, DJs, advertising, etc., so due to objective reasons, the bandwidth of the data channel when embedding the digital transmission signal into the audio may not be permanent. In some moments of time the transmission speed can be very low, and in others greatly exceed the average throughput of the system.

Possible incremental redundancy coding in the driver information messages at low PR�exhaust capacity of the program.

Additionally, between the insertion device and the decoder can be enabled simulator radio channel to simulate interference and distortion of the output signal.

Advantageously, in the system device insertion was performed with the possibility of replacing parts of the original audio signal with an audio signal coded with an informational message.

Advantageously, in the system device insertion was performed with the possibility of additions to the original audio signal by an audio signal from the encoded information message.

Advantageously, in the system in the device insert into the original audio signal is inserted is converted into an audio signal encoded information message using the psychoacoustic model.

In practice, the proposed technical solution, when the digital information signal inserted into the audio of analogue broadcasting stations, can be implemented in both software and hardware. In the case of a hardware implementation, the device inserts, digital driver information messages, the decoder information messages, the simulator distortion of the signal in the radio channel can be implemented as separate hardware and software complex to be included in the gap of the sound signal coming from the source audio to the transmitter. In the case of PR�software implementation, the above modules may be implemented as software) that are installed on the same computer as the software for radio automation. In this embodiment, to insert the information signal can programmatically break the chain of transmission of the audio signal from the source audio to the transmitter. For example, in Windows this is possible with the use of plug-in modules for signal processing DirectX or through the implementation of driver virtual audio device input / output.

The implementation of the receiving device programmatically on mobile phones and smartphones or music players, and handheld computers with integrated receiver, audio broadcasting signals; or by software on any mobile device, having in its composition a microphone.

Next, a method of transmitting in a preferred embodiment will be described on the example of the device for insertion of digital information in the audio signal and systems transmit digital information in the channel broadcasting in the preferred embodiments.

Fig.1 - structural diagram Nokia Visual Radio.

Fig.2 is a structural diagram of a Radio Data System.

Fig.3 is a structural diagram of a device for inserting digital information into an audio signal in a preferred embodiment (with extra�tive device insertion).

Fig.4 - options (a, b) allocating the bandpass filter of the main signal.

Fig.5 is a structural diagram of a system for transferring digital information in the channel broadcasting in the preferred embodiment.

Fig.6 - versions of the user transmitted digital information (a - a mobile device with a built-in radio receiver, 6 - mobile device using Autonomous radio).

At the first entrance (VH) the device for insertion of digital information in the audio signal 1 (insertion device) shown in Fig.3, connected to the bandpass filter 2 and the first input of the subtractor 3. To the output of the filter connected to the second input of the subtracter 3 and the first input of the adder 4 ("+"). The output of the subtracter via series-connected residual signal analyzer 5 and the generator (generator) replaces signal 6 is connected to the second input of the adder 4. The additional input of the shaper of the replacing signal is connected to the second input (VH) device insertion. The described portion of the insertion device comprises a main insertion device according to the first embodiment of the invention, or the first circuit inserts the digital information signal in the audio signal.

The output of the adder 4 is connected to the first input of the supplementary adder 7 ("+"), and to its second input through the series-connected divider signal 8, the transmitter amplitude JV�Ctra 9, the transmitter of the global masking threshold is 10 and the driver complement of the signal 11. The output of the adder 7 is the output (O) of the device inserted. The additional input of the shaper of the complementary signal is connected to the second input (VH) device insertion. Described part of the device insert is an additional device insertion or second (additional) chain insertion.

The device inserts that provide comprehensive integration of information messages in the source sound signal, operates as follows. On VH serves the original audio signal to the radio. At the first stage filter and the subtractor signal is separated into two components: the "main" component with the audible content signal and a residual component with less visible content. Both components may overlap in frequency, that is, for example, the filter may have a smooth decay at the boundary of the bandwidth (Fig.4A). In the preferred embodiment, bandpass (separating) the filter generates one or more dips in the frequency domain, the least audible to the human ear [3] (Fig.4B). From the output of the subtractor residual signal to the residual signal analyzer 5, where its spectral composition analyzed (e.g., using a Fourier transform or other method).

Nai�enny spectral characteristics of the residual signal is passed to the generator (generator) replaces signal 6, on an additional input (VH device insertion) which is also received encoded digital message (including modulated, containing synchrophasing). In driver 6 form "substitute" a signal containing digital data messages and having spectral characteristics similar to the "residual" signal. Formed thereby "replacing" the signal takes into account the psychoacoustic characteristics of sound perception by the human ear (insensitive to phase distortion), and therefore almost indistinguishable from the original residual signal. Further, in the adder 4 is the "main" signal output from the filter is summed up with "instead of" signal carrying digital information.

To facilitate the formation of a "substitute" signal, one can partition a "residual" component of the signal into segments of duration less than the interval quasistationarity original sound (about 10-40 MS). The "total" signal at the output of the adder 4 (the output device in the first embodiment) has the same spectral composition as the original signal, but slightly modified structure of the phase spectrum (and inherent digital information component). With careful choice of the form of a bandpass filter, you can achieve almost complete subjective acoustic stealth f�basic modifications insertion of the "residual" signal that is converted to a "substitute".

In the second stage produces the generation of a "complementary" signal, which additive is added to the audio signal received at the first stage and which is the source for additional device insertion. The formation of the "complementary" of the acoustic signal produced as follows. First, the audio signal ("total" is output from the first adder or the "source" - with VG device in the second embodiment, when using the unit insert only the second circuit) is divided in the divider signal 8 into short segments, not exceeding the interval quasistationarity the original audio signal. Then, in block 9 calculates the amplitude spectrum of audiosegment using, for example, fast Fourier transform (FFT) and next, in block 10 on the basis of the psychoacoustic model calculates the global masking threshold. The global masking threshold determines the level and shape of the amplitude spectrum signal that can be added to the total (initial in the second embodiment) audiosegment, without degrading the subjective quality of the sound program. A procedure for the calculation of the global masking threshold based on a psychoacoustic model is known and used in almost all modern compression schemes for audio files, such as MPEG Laer II/III [4], and therefore in this application, this procedure is not described in detail.

Further, the global masking threshold is used in the driver complement of the signal 11 for the formation of the amplitude spectrum of the modulated digital signal, carrying the information message received from WCH device. Thus formed the "complementary" signal in the additional adder is added to the audio signal generated at the first stage, to obtain the total ("total" for additional device insertion). Since the "complementary" signal is always below the threshold of audibility (as it represents the maximum possible signal not exceeding the threshold masking), his presence in the "total" signal at the output of the insertion does not affect the subjective quality of the final audio signal.

Thus, one information message is used to generate two types of signals ("substitutes" and "complements") and "coherent" summation. It turns out that in the end add one signal consisting of two components. This achieves a more reliable reception (in the described insertion device faster) built-in messages.

Describes how to add a "placeholder" and "complement" signals allows to achieve a maximum speed of re�ACI data via the data channel with minimal acoustic signature changes made to the original audio signal. Built-in digital information does not degrade the subjective quality of sound and is totally invisible to the listener, because it is masked by the basic sound signal. Herewith transmit a communication signal exclusively in the audible frequency range of 30 Hz to 15-16 kHz for FM radio stations and up to 5-10 kHz for AM radio stations, i.e. does not contain frequencies, which could be heard by the human ear.

In the case of a stereo broadcast, for best results, the procedure of the insertion implement separately for each sound channel.

System for transmitting digital information in a radio broadcasting channel, shown in Fig.5 comprises a source 21 audio programs (IP), connected to the first input VH insertion device 1 (HC) informational messages in the audio to the output (O) of which is connected to the radio transmitter 22. Source of information reports 23 (IP) connected to the first input VH driver information messages 24 (FIS), the output of which is connected to the second input VH HC 1. Output (O) SW 1 is connected also to the second input (VH) PAS 24 through the series-connected simulator radio channel 25 (IFR) and the decoder information signal 26.

IP can be an internal archive in an electronic medium in which data will be flagged�till then recorded informational messages or a local/global computer network, from which information messages are dynamically loaded.

The system works as follows. SP 21 transmits a radio program to a first input (VH) HC 1. At the desired times from IP 23 to transmit a digital message to PAS 24. This message can be associated with the current audio data stream, and completely independent. You may also combine these options. FIS at each time interval generates an information packet for transmission, which, in any way connected with the current information message. In the simplest scenario - it could be a cyclic repetition of the same information in a more complex embodiment may use incremental redundancy coding and the transmission of additional redundant data bit associated with the original message. Such coding methods are widely known (see e.g. [5]) and are not discussed in this application.

Then FIS shall implement the modulation and insertion of synchrophasor in the encoded information message.

Received the encoded message is transmitted to VH HC 1, which are its components in the audio program, as described above, and transmit with O HC 1 total audio broadcast via the radio transmitter 22. With O HC 1 total audio through�Tupa also on the decoder 26 (via 25 RBIS). In case of successful decoding of a message, the decoder produces a signal in FISS 24 to change the information message, in which FIS cease transmission to HC 1. That is, simultaneously with the transfer is carried out, the total decoding of the audio signal. Thus, assume that the decoder at the user side should also have time to decode this message. CALVES 25 are used to simulate typical or worst-case distortion of the audio signal when passing through the radiolink. Usually, this simulation is to add noise to the signal from SW 1 to reduce the signal-to-noise, although can be simulated and other distortion. Thus, to more accurately predict the time interval required for reliable reception of the message on the receiving side. Only after decoding total audio skip to the next message is sent (FIS begins receiving and processing messages from the IP). Thus transmit independent information messages.

The accuracy of decoding at the decoder is determined in the usual way, using additional redundant information embedded in FIS transmitted signal, for example a CRC (cyclic check), message digest, checksum, etc.

If necessary, synchronize the transmission of digital messages from radioprogram�Oh also used known methods. For example, at the beginning of a new audio program (its fragment) via an additional output of FE input of IP (Fig.5 not shown) serves a command to transmit a new message in FISS. The time of submission commands defined by the playlist in IE, which indicates the start of the new program, and he manages the transfer in this situation.

In the temporary absence of informational messages (for example, when associated with the program in the message have been sent, but the transmission of the next has not yet begun), the radio transmitter receives the original audio signal (radio transmission from the source 21), i.e. the total is equal to the original audio signal.

Thus, the insertion of a coded information message is repeated until a successful restore you mentioned decoding.

The described system allows to use the heterogeneity of the sound programs (fructueuse theoretical bandwidth of radio channel) to harmonize the duration of the transmission of individual built-in information messages with the nature and properties of the outgoing of the audio program material.

Fig.6 (a, b) shows the options the user acceptance to the radio and handed over to her messages. In the first embodiment (Fig.6(a)) on the receiving side decoder information signal may �be embedded in a portable or mobile device with integrated analog radio broadcasting. The radio receiver receives the summed signal and transmits to an audio output which through a speaker it is perceived by the user as a normal broadcast, thanks to the above properties of this signal. With total audio output signal is supplied also to the input of the decoder, i.e. can be connected in parallel to the loudspeaker or head phones. After receiving and decoding the received digital message is transmitted through the output of the decoder on the device display information messages to the user.

In an alternative embodiment (Fig.6(b)) receiving digital messages embedded in the audio program, can be carried out with the help of two devices: a standard radio sound broadcasting (with speaker) and portable devices with built-in microphone and decoder messages, through which the information message is transmitted to the display device (Fig.6b). Last option is possible, as all numerical information embedded in the audio signal, and accordingly, it is passed (albeit with some loss) and relay the sound through a chain speaker-microphone.

Although the invention is shown and described with reference to its specific embodiments of, specialists in this area� technology needed to understand that various changes in form and content can be made without deviation from the essence and scope of the invention defined by the attached claims.

In particular, as a device insertion than the above, may be used any of known devices.

For example, as described in the closest analogue (EP 9700338), the device inserts an informational message (Input 2) to modulate a carrier signal with the spectrum to simultaneously determine the current threshold of hearing source (audio Input 1). Reduce the level of the signal with the spectrum below the current threshold of hearing and then summarize the received signal with a source audio signal for transmission over the air (via the Output device insertion).

Another example of the insertion device may be the device described in reference [6], where the original audio adds a delayed copy of the same signal, where the delay is determined by the bits of the information message. Then the total signal with modulated echoes are passed through to the output device for transmission over the radio channel.

Can also be used other methods of inserting digital information into an acoustic signal.

Thus, the inventive method and system allow to achieve the claimed technical result in any systems radio�transfer - including analog, as with AM and FM, as well as in systems with transmission of information messages on parallel frequencies.

The proposed technical solutions are universal, since it does not require additional frequency resource. When used in FM radio broadcasting free subcarriers (in contrast to the way in RDS systems) can be used to transmit additional data (e.g., traffic information). In addition, the receiver does not require a channel of the mobile Internet, i.e. there is no need to pay for the service user and greatly expands the range of devices, suitable for the reception of the multimedia content.

Literature

1. http://en.wikipedia.org/wiki/Visual_Radio (last time checked 2010.03.01).

2. D. Kopitz, RDS: The Radio Data System, Artech House Publishers, 1998, p. 376

3. I. aldoshina, psycho-acoustic Fundamentals, part 12: the Loudness of complex sounds //Sound producer, No. 9, 2000(http://rus.625-net.ru/audioproducer/2000/09/aldoshina.htm).

4. ISO-IEC 11172, part 3, Annex D.

5. A. Shokrollahi, Raptor Codes, IEEE Trans. Information theory, vol. 52, No. 6, p.2551-2567, 2006.

6. D. Gruhl, A. Lu, and W. Bender, "Echo Hiding", Information Hiding, Lecture Notes in Computer Science, Volume 1174, 1996, p. 295-315.

1. A method of transmitting digital information in a radio broadcasting channel, comprising encoding information message, insert into the original audio signal is converted into the audio signal of the encoded information message�of using a psychoacoustic model, transfer received total the audio channel of the radio, characterized in that simultaneously with the transfer is carried out, the total decoding of the audio signal, and inserting the encoded information message is repeated until a successful restore you mentioned decoding.

2. A method according to claim 1, characterized in that increasing the redundancy in the encoding of a message to re-insert into the original audio signal.

3. A method according to claim 1, characterized in that the pre-decode total distorted audio signal.

4. A method according to claim 1, characterized in that the insertion is carried out by replacing parts of the original audio signal with an audio signal coded with an informational message.

5. A method according to claim 1, characterized in that the insertion is carried out by addition of the source audio signal by an audio signal from the encoded information message.

6. System for transmitting digital information in a radio broadcasting channel, comprising a source of audio programs, the source information messages, driver information messages for the encoding of a message, the insertion device and a radio transmitter, characterized in that the source of the audio program connected to the first input of the insertion device, the source information message connected to the first input of form�Atelier messages, made with the possibility of re-transmission of the encoded information message, the output of which is connected to the second input of the insertion device, the output of which is connected to the radio transmitter, and a decoder connected to the second input of the shaper of information messages and arranged to signal the change information messages.

7. A system according to claim 6, characterized in that the driver information messages made with the possibility of increasing the redundancy of the encoding of a message.

8. A system according to claim 6, characterized in that the decoder is connected to the output of the device insertion via simulator radio channel.

9. A system according to claim 6, characterized in that the device inserts into the original audio signal is inserted is converted into an audio signal encoded information message using the psychoacoustic model.



 

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19 cl, 7 dwg

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to information transmission. Disclosed is a receiver for receiving information signals in a text format, which receives the information content using the text format divided into information objects, wherein the receiver is a radio broadcast receiver and the text information signal is a text information signal for forwarding in a carousel data transmission mode, wherein the information objects are transmitted in the carousel mode, which includes a user-controlled selector; and a processor designed to analyse an information object, which includes a selected object ID from a plurality of unique objects IDs, which determines whether the analysed information object is a link object which supports automatic processing, comprising link items indicating other object IDs from the plurality of the unique objects IDs; if so, the method includes verifying if conditional data associated with the link items for the link object supporting automatic processing are satisfied; and automatically assigning an ID to an object indicated by the link item for the link object supporting automatic processing, having conditional data associated with the conditional data that were satisfied for a recently selected object ID, or providing a user with a presentation relating to the link object supporting automatic processing using a method which depends on the verification result and assigning an ID to the object indicated by the said link item for the link object supporting automatic processing, selected by the user using the user-controlled selector as a newly selected object ID.

EFFECT: reduced navigation costs when transmitting text information.

22 cl, 8 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to bandwidth expansion devices. An excitation signal based on an acoustic signal is generated; with that, the acoustic signal includes a variety of frequency components. A feature vector is distinguished out of the acoustic signal; with that, the feature vector includes at least one feature of a component in a frequency domain and at least one feature of a component in a time domain. At least one parameter of the spectrum shape is determined based on the feature vector; with that, at least one parameter of the spectrum shape corresponds to a sub-range signal containing frequency components that belong to an additional variety of frequency components. A signal of the sub-range is generated by the filtration of an excitation signal by means of a filter bank and weighing of a filtered excitation signal using at least one parameter of the spectrum shape.

EFFECT: technical result consists in the improvement of perception of an expanded acoustic signal.

21 cl, 10 dwg

FIELD: physics, acoustics.

SUBSTANCE: invention relates to means of synchronising wireless headphones. In one embodiment, one speaker operates as the main speaker and other speaker operates as a secondary speaker. The main speaker receives digital audio data from a source and, in addition to reproducing digital audio received from the source, relays the digital audio to the secondary speaker. The main speaker additionally sends synchronisation data to the secondary speaker, such as data indicating the buffer status or the reproduction position of the main speaker. The secondary speaker uses the synchronisation data from the main speaker to control, for example, the status of its buffer or reproduction position so that the two speakers reproduce audio synchronously (for example, within 30 ms). In one embodiment, the main speaker uses a connection-based protocol, such as TCP/IP, in order to transmit buffered audio data to the secondary speaker, and uses a connectionless protocol, such as UDP or ICMP, for synchronisation data. Furthermore, the speakers can change the main and secondary speaker roles.

EFFECT: reducing Haas effect.

36 cl, 6 dwg

FIELD: radio engineering, communication.

SUBSTANCE: method of picking up speech signal in presence of interference, which comprises converting an input mixture of an acoustic signal and interference into an electrical signal, filtering with a band-pass filter to obtain a mixture of a speech signal and interference with a given bandwidth, which is amplified in a low frequency amplifier; an analogue-to-digital converter (ADC) generates readings of the mixture of the signal and interference in digital form and transmits said readings to a computing device, which forms pairs of sums of amplitudes of the readings in a certain manner and calculates signal amplitudes for each moment in time using the obtained summation results by solving corresponding systems of linear equations.

EFFECT: high efficiency of picking up a speech signal in the presence of interference.

2 dwg, 1 tbl

FIELD: physics, video.

SUBSTANCE: invention relates to a method of sounding video broadcasts. A source media stream is transmitted from a video source to commentator devices. Unique media streams are formed, which are then mixed with the source media stream with a calculated delay. Said streams are then transmitted through a broadcaster to viewers in the form of separate channels which can be switched with each other.

EFFECT: forming separate channels with the same video track and different audio tracks from different commentators while enabling automatic or manual switching between channels, wherein the commentaries can be in different languages.

2 cl, 1 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to mobile computing devices. The result is achieved by receiving an indication to a touch anywhere on a touch screen interface of a mobile computing device; upon reception of an indication to a touch anywhere on the touch screen interface, activating a listening mechanism of a speech recognition unit and displaying dynamic visual feedback of a measured sound level of a spoken utterance received by the speech recognition unit, wherein the displayed visual feedback is rendered as centred around an area on the touch screen at which a touch is received.

EFFECT: providing a maximum size of a target area on a screen to initiate listening of a speech recognition unit.

15 cl, 7 dwg

Electronic computer // 2523220

FIELD: information technology.

SUBSTANCE: electronic computer has random access memory, the output of which is connected to an arithmetic logic unit, as well as rows of photocells which respond to red light and are connected through switches to the random access memory. The output of the arithmetic logic unit is connected through switches to thirty comparison units. Outputs of the thirty comparison units are connected to control electrodes of thirty switches, respectively. A pulse generator is connected to inputs of the thirty switches, outputs of which are connected to inputs of the thirty switches, respectively. Outputs of the thirty switches are connected to the random access memory of a bit-map display.

EFFECT: computer speech recognition using lip reading.

6 dwg

FIELD: radio engineering, communication.

SUBSTANCE: device for embedding digital information into an audio signal includes, connected to its first input, a first input of a subtractor and a band-pass filter, the output of which is connected to the first input of an adder and the second input of the subtractor, the output of which is connected, through series-connected residual signal analyser and replacement signal former, to the second input of the adder, the output of which is connected to the first input of an additional adder and a signal divider, the output of which is connected, through series-connected amplitude spectrum computer, global masking threshold computer and subsidiary signal former, to the second input of the additional adder, wherein additional inputs of the replacement signal former and the subsidiary signal former are connected to the second input of the embedding device, and the output of the additional adder is connected to the output of the embedding device.

EFFECT: minimising duration of transmission with minimum possible coding redundancy of a separate information message.

6 dwg

FIELD: radio engineering, communication.

SUBSTANCE: method of transmitting speech signals includes breaking down the speech signal into equal fragments, encoding said fragments, sending to a communication channel, decoding and constructing the speech signal from the fragments, the method being characterised by that at the transmitting side, two speech signals are selected instead of one speech signal; each is broken down into equal fragments; all even fragments are deleted from the first speech signal and all odd fragments are deleted from the second speech signal; the remaining fragments are encoded and sent to a communication channel; at the receiving side, for the first speech signal, even fragments deleted at the transmitting side are replaced with previously obtained odd fragments from the first speech signal, and for the second speech signal, odd fragments deleted at the transmitting side are replaced with previously obtained even fragments from the second speech signal.

EFFECT: transmitting speech signals in a narrowband channel, transmitting two speech signals with acceptable quality over one available channel.

2 cl, 10 dwg

FIELD: physics.

SUBSTANCE: user system for creating an atmosphere, such as a lighting system, can automatically create a certain atmosphere by simply using a keyword which is entered at the input of the system. A keyword, for example "eat", "read", "relax", "sunny", "cool", "party", "Christmas", "beach", may be spoken or typed by the user and may enable the user to find and explore numerous atmospheres in an interactive and playful way. Finding atmosphere elements related to the keyword may be done in various ways according to versions of the invention. The invention also allows a non-expert in designing or creating atmosphere scenes to control the creation of a desired atmosphere in an atmosphere creation system.

EFFECT: broader functional capabilities of creating a lighting atmosphere, easier control of said atmosphere.

14 cl, 6 dwg

FIELD: physics.

SUBSTANCE: user system for creating an atmosphere, such as a lighting system, can automatically create a certain atmosphere by simply using a keyword which is entered at the input of the system. A keyword, for example "eat", "read", "relax", "sunny", "cool", "party", "Christmas", "beach", may be spoken or typed by the user and may enable the user to find and explore numerous atmospheres in an interactive and playful way. Finding atmosphere elements related to the keyword may be done in various ways according to versions of the invention. The invention also allows a non-expert in designing or creating atmosphere scenes to control the creation of a desired atmosphere in an atmosphere creation system.

EFFECT: broader functional capabilities of creating a lighting atmosphere, easier control of said atmosphere.

14 cl, 6 dwg

FIELD: radio engineering, communication.

SUBSTANCE: device for embedding digital information into an audio signal includes, connected to its first input, a first input of a subtractor and a band-pass filter, the output of which is connected to the first input of an adder and the second input of the subtractor, the output of which is connected, through series-connected residual signal analyser and replacement signal former, to the second input of the adder, the output of which is connected to the first input of an additional adder and a signal divider, the output of which is connected, through series-connected amplitude spectrum computer, global masking threshold computer and subsidiary signal former, to the second input of the additional adder, wherein additional inputs of the replacement signal former and the subsidiary signal former are connected to the second input of the embedding device, and the output of the additional adder is connected to the output of the embedding device.

EFFECT: minimising duration of transmission with minimum possible coding redundancy of a separate information message.

6 dwg

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