Radio broadcasting system

FIELD: physics; radio.

SUBSTANCE: invention relates to radio communication engineering and can be used for stereophonic and monophonic broadcasting. The radio broadcasting system has the following on the transmitting side: four signal processing channels, an encoding unit, a composite signal generator, a sinusoidal oscillator, a frequency divider, a transmitter as part of series-connected carrier frequency generator, amplitude modulator, and an output amplifier; on the receiving side: a digital receiver which includes a bipolar amplitude detector, first and second pulse formers, four digital-to-analogue converters, two channels, each of which includes series-connected speech filter, power amplifier and loud-speaker, a control unit, radio signal reception unit, clock pulse selection unit and two receiving registers.

EFFECT: reduced energy consumption by the system transmitter and increased number of receiving radio stations at the receiving side.

10 dwg

 

The invention relates to techniques for radio communication and can be used for stereo and mono broadcasting.

For the prototype accepted "Digital broadcasting system" [1], containing on the transmission side four channels of audio signals, each of the receiver and audio amplifier audio frequency block coding of the four ADC audio signal, the processing unit group of the signal generator of sinusoidal oscillations, the frequency divider and the transmitter in the composition of the generator carrier frequency, amplitude modulator and the output of the amplifier on the receiving side includes a digital receiver, comprising a receiver precise frequency and bipolar peak detector, connected in series, the first shaper pulses, a pulse counter, a decoder and the first pulse distributor, the first delay element; element NOT and element, And the second and third delay elements, the second pulse distributor, a second pulse shaper, four channels, each of which includes the first key, the trigger, the second key and the first register, and serially connected third and fourth keys, the second register, a digital-to-analogue Converter /DAC/filter audio frequency power amplifier and the loudspeaker. The sampling frequency codes beeps 160 kHz. Clock frequency in the system is IU of 9.6 MHz. Codes beeps 16-bit. The repetition frequency codes of clock pulses 160 kHz, codes of the first stereo signal 160 and the second stereo signal is also 160 kHz, successive total frequency of repetition codes 480 kHz. Group signal includes sequentially following the sending clock pulses, then two codes of the first stereo signal /or two mono signals/ and then the two codes of the second stereo /or two mono signals/. At the output of the shaper group of signal units in the codes are positive and negative presinusoidal. Radio signals are accepted by the digital receiver receiving side, amplified, detected bipolar peak detector, polyinosine converted into pulses, codes of sound signals converted four DACS in the analog audio signals reproduced by the loudspeakers. The disadvantages of the prototype are: excessive consumption transmitter power required for amplification and radiation of redundant information in the sense of the carrier frequency and the second unused side frequency, the digital receiver filters centered selectivity /VIF/ in the input circuit and the appropriate number of bandpass filters limits the number of received broadcast radio stations. The purpose of the invention is reducing the energy consumption of the transmitter and of expanding the range of acceptable radio broadcasting radio stations. Technical results are the reduction of energy intensity of the transmitter system, increasing the number of stations receiving party.

Summary of the invention in that in the transmitter amplitude modulator runs from the ring modulator and bandpass filter, into a digital receiver enters a block control unit receiving a signal, the block selection pulse, the frequency synthesizer and two receiving register.

Structural diagram of a transmitting side in figure 1, the structure of the multicast stream emitted in the air, in figure 2, the diagram of the ADC in figure 3, the design of piezoelectric in figure 4, the shaper group signal figure 5, the spectrum of the amplitude-modulated signal figure 6, the digital radio receiver 7, the bipolar peak detector Fig, block allocation sync pulse figure 9, the timing diagram of figure 10.

The transferor includes /figure 1/ four channel audio signals, each including serially connected receiver 1 audio amplifier 2 audio frequency and the ADC 3, four ADC United in the encoding unit 4, the imaging unit 5 group signal, connected in series generator 6 sinusoidal oscillations and the divider 7 frequency transmitter 8 in the series-connected generator 9 of the carrier frequency, which frequency multiplier, am Letunova modulator 10 and the output of the amplifier 11. Analog-to-digital converters a /d Converter/ 3 are /3/ are identical in the structure of series-connected controlled divider 12 voltage, block 13 keys, the matching of the amplifier 14, the amplifier 15 and piezoelectric 16, 17 positive reference voltage source 18 negative reference voltage, the emitter of the pulse of the led 19, a slit diaphragm 20 and a micro 21, line 22 of the multi-element photodetector, the first decoder 23, the encoder 24 and the second decoder 25. Phasedetector 16 is a bimorph piezoelectric element with a light reflector on the end /4/, structurally designed [2, p.119 is] of the first 26 and second 27 piezoplates, the internal electrode 28, the first 29 and second 30 external electrodes. One end of piezoplates mounted in a holder 32, the free end of the light reflector 31.

Shaper 5 group alarm /5/ consists of four channels, each of which has connected in series receiving register 33, block 34 elements And 16 elements And the first element OR 35 includes the first 36 and second 37 distributors pulses, connected in series to the second element OR 38, the third element 39 and the first output key 40, connected in series, the fourth element OR 41, the element 42 delay and the second output key 43, includes serial is Ino United third key 44, shaper 45 pulses and the counter 46 pulses, the output of which is connected in parallel to the signal inputs of the first 47 and second 48 keys. Sampling the audio signal 160 kHz. Clock frequency in the system is: ft=160 kHz · 16 times=2,56 MHz, the period of clock pulses 390 NS. The carrier frequency is taken fn=2,56 MHz · 15=38,4 MHz, the stability of the carrier 10-6. The upper side frequency fn=38,4+2,56 MHz=40,96 MHz lower side frequency fbottom=38,4 MHz Of 2.56 MHz=35,84 MHz. Digital receiver includes /7/ block 49 control /choice of radio stations/, connected in series unit 50 receiving a signal, the amplifier 51 and bi-polar radio frequency amplitude detector 52, connected in series, the first shaper 53 pulses, block 55 allocation sync /SI/ and synthesizer 56 frequencies comprises a second shaper 54 pulses, the first 57 and second 58 foster registers, with each 32 bits, four DAC 59, four switch 60 and two channels, each of which contains a filter connected in series 61 audio frequency amplifier 62 power and loudspeaker 63. As Svecofennian 1 apply microphones, amplifiers 2 are audio amplifiers, analog signals they receive at their inputs the ADC 3. The divider 12 voltage is semi openitem resistive voltage divider, the gear ratio of which is changed by the signal from the second dissipator 25 by means of the seven keys unit 13. The signal amplified by the amplifier 15, is fed to the first input of piezoelectric 16, the second and the third input of which receives the reference voltage from reference sources 17 and 18 [2, s]. Converting the audio signal into the code is to scan the beam of the led reflector 19 of piezoelectric 16 to the plane of the entrance pupil photodetectors line 22, a light pulse is converted into an electrical signal, stimulating the appropriate bus encoder 24, and outputs the code of the instantaneous value of the input signal. Discretization transforms 160 kHz. The photodetectors in the line 22 are avalanche photodiodes LFD with a response time of 10 NS. Line 22 contains 1024 photodetectors for encoding signals to 10-bit code. Resolution adopted 10 μv that when coding a 16-bit code is the range of the encoded signal at the ADC input from 0 to 0,65536 Century Decoder 23 is designed for switching the signal from the photodetector line 22 and the signal from the decoder 25 to the corresponding input of the encoder 24. At the output of the encoder 24, the code seems to be 16-bit. With encoder code 24 is fed to the ADC output and the input of the second decoder 25, which pulse with the corresponding output opens corresponding to the JCH unit 13 to increase or reduce/ transfer coefficient of the divider 12 voltage. When there is no signal at the input of the divider 12, the voltage at the input of the decoder 25 receives the code of zeros. The signal from the first output unit 25 opens the first key in the block 13, which connects to the block 14 of the first stage of the divider 12, determining the transmission coefficient of 1. With increasing amplitude of the audio signal, this process is repeated until the output of the encoder code 210. With the advent of the decoder 25 of this code on the second it comes out a signal that opens the second key unit 13, the transmission coefficient becomes of 0.5. With further increase of the amplitude in the decoder 25 receives the code of the 211the transfer ratio of the divider 12 is 0.25, code 212determines the gear ratio 0,125, code 213- 0,0625, code 214- 0,03125, code 215- 0,015625, who remains to code 216. When reducing the amplitude of the signal is the reverse process. The speed of conversion of 2×106converted/sec Time delay is the sum of the positives: the photodetector LTD 10 NS, the decoder 23-0,2 ISS, the encoder 24-0,2 ISS, the decoder 25-50 NS [6, s, 231, 246], the total time when code 2160.5 MS that with a stock meets the sampling rate of 160 kHz /6.25 ISS/. Codes from the ADC 3 act synchronously and in parallel form in their adoptive registers 33 unit 5, the signal issuing codes is the sampling pulse from the divider 7 frequency. Codes are received at the first inputs of elements And components is 34, containing 16 elements And. Valves 36 and 37 contain 32 outputs /5/, the valve 36 serves pulses elements And blocks 34 of the first and third channels, the distributor 37 pulses serves pulses elements And blocks 34 in the second and fourth channels. The input pulses to the distributor 36 is a positive half cycles of the sine waves with the second output of the divider 7 frequency of 2.56 MHz, the input pulses to the block 37 are negative presinusoidal of 2.56 MHz also with the second output of the divider 7 frequency. The first 47 and second 48 key opens the signal Ufromfrom the counter 46 pulses, closed the key signal with 32-th output unit 36, and 37. The signal that covers the key 43, opens the third key 44, which is open skips 16 pulse frequency of 2.56 MHz from the fourth output of the divider 7 frequency at the input of the shaper 45 pulse shaping their duration, which come to the second input of the third element OR 39. These pulses are received by a five digit counter 46 pulses. With the advent of it 16 pulses, the counter generates code 10000, and with the high-order bit of the counter 46 is followed by a pulse which opens the keys 47, 48, closes the key 44 and resets the counter 46. The initial state of the keys 47, 48 closed, the key 44 is open, therefore, from the beginning of the operation unit 5 of the first code with its output goes code of 16 units-synchronization code /C/, figure 2. With the power key 44 passes 16 pulse shaper 45 pulses, which pulses 195 NSfed to the input of the third element 39 and the input of the counter 46, the signal from the senior level which closes the key 44, opens the keys 47, 48 and clears the counter 46. In the blocks 36, 37 are received respectively positive and negative presinusoidal of 2.56 MHz, 1-16 output unit 36 pulses are received at the second input elements And block 34 of the first channel, 1-16 output unit 37 pulses are received at the second input elements And block 34 of the second channel. From the outputs of the block 34 of the first channel pulses codes through the first 35, the second 38 and third 39 items OR open at the time of its duration 195 NS output key 40, which is open skips one positive half-sine pulse /2,56 MHz/ output unit 5. From the outputs of the block 34 of the second channel pulses codes through the first 35, 41 second elements OR delay element 42 open at the time of its duration 195 NS second output key 43, which is open skips one negative half-sine pulse of the same frequency /2,56 MHz/ output unit 5. Positive and negative presinusoidal with keys 40, 43 are symbols of units in the codes of the first and second channels, the incoming modulating signal amplitude modulating the top 10 of the transmitter. After testing the valves 36, 37 of the first 16 pulses following 16 pulse outputs 17-32 act respectively on the second inputs of elements And blocks 34 of the third and fourth channels. The pulses from the elements And block 34 of the third channel through the elements OR 35, 38, 39 are received at the control input of the first output switch 40, the fourth channel through the elements OR 35, 41 and the element 42 delays arrive at the control input of the second output switch 43, the output of block 5 follow the codes of the third and fourth channels. Pulse with 32-th output unit 36 closes the key 47, a pulse with a 32-th output unit 37 closes the key 48 and opens the key 44, it should again issue code sync, then the process has to be repeated. One cycle group signal consists of /2/ the code C, the following codes of the first and second channels and codes of the third and fourth channels: first, second, third, and fourth codes are four mono or two stereo signals. Unit codes in C, the first and third channels is a positive presinusoidal frequency of 2.56 MHz, the zeros of their lack of units in the codes of the second, fourth channels are displayed as negative presinusoidal the same frequency, the zeros of their absence. The output of block 5 represents the following complete or incomplete sinusoid frequency of 2.56 MHz, which is the modulating signal is crimson for the carrier frequency of the transmitter. The repetition rate codes C 160 kHz, the first and second signals 160 kHz and the third, the fourth signal is also 160 kHz, the total frequency of repetition codes is in the air of 480 kHz. The spectrum of the amplitude-modulated signal consists of a carrier and two side frequencies /top and bottom/ 6. Itself is the carrier frequency and one of the side frequencies /unclaimed/ in the information sense, are redundant. For radiation of only one side of the frequency, the carrier and code information, the amplitude modulator 10 is of the series-connected ring modulator and bandpass filter [3, s, 235]. The ring modulator is suppressed carrier frequency, band-pass filter filters out unwanted side frequency, in the described embodiment, the bottom. The upper side frequency information codes is given in the output amplifier 11 and is radiated in the air, when the stability of the carrier frequency 10-6it occupies the strip in the air is ±41 Hz or 82 Hz. The radio signal is received by the antenna digital receiver /7/ and to the input of the block 50 of the reception signal, which is a selector channel radio with electronic tuning and includes the input circuit, the radio frequency amplifier and mixer. Band-pass filter amplifier radio frequency rebuilt the bias voltage from the unit 49 controls: RF signal is l through the loop connection is supplied to the emitter of the mixer, here on the mixer is fed from the output 3 of the synthesizer 56 frequency equal to the carrier frequency of the transmitter is necessary for the detection of single-sideband signal [4, p.146]. The signal of the mixer, which is the output signal of the block 50, is amplified in the amplifier 51 radio frequency and is supplied to the bipolar input of the amplitude detector 52, made by the scheme on Fig. Second input unit 56 is connected to the second output unit 49 controls. When the block 49 to the desired channel radio control output 2 block 49 enters the synthesizer 56 frequencies and determines the frequency of the signal from the third output unit 56 to the third input of the block 50. Diode D1 /Fig/ highlights the positive envelope of the modulating signal figure 10 Diagr/. The diode D2 of the modulating allocates envelopes of positive polyinosinic - suffix codes C, the first and third signals /Diagr/. The diode D3 of the modulating allocates envelopes negative polyinosinic - character units in the codes of the second and fourth signals /Diagr/. From the first output unit 52 proyektirovaniye positive presinusoidal /2,56 MHz/ is fed to the input of the first driver 53 of the pulses from the second output unit 52 proyektirovaniye negative presinusoidal fed to the input of the second shaper 54 pulses. Shapers 53, 54 pulses made by the scheme of asymmetry the aqueous trigger with the emitter coupling [5, s]forming the rectangular pulses of the harmonically varying signals. The pulses have the same polarity and the same duration as the pulses in the codes of the transferor. Unit codes are represented by the presence of a pulse, the zeros of their absence, figure 10). 12.13). At block 53, the pulse codes act on the information input output register 57 and to the first input unit 55 allocation sync /SI/. The information input unit 55 is the counting input of the counter 64 pulses /figure 9/, the controlling unit 55 is a control input /Uo/ counter 64 pulses. An information input unit 55 is connected to the output of the shaper 53 impulses, managing its input through a diode D1 is connected to the output of the shaper 54 pulses. The five digit counter and counts the consecutive 16 pulses. If code is zero, the item is NOT 65 outputs a signal, Abdoulaye counter 64, which begins the account again. Upon entering the counting input 16 consecutive pulses in the counter code is generated 1000, and with senior level should signal SI to the first input unit 56. The same signal through the diode D2 resets the counter to zero 64 pulses, which can lead to 10000 only when the C code, i.e. a code of all ones. When receiving code signals 1 or 3 with block 53 in them will always be at least one zero, which element 65 will be about nolet counter 64, and he will not attain account 16 - always before the number 16, the counter is reset. When receiving code signals 2 and 4 of block 54 each pulse of these codes will also reset the counter 64. Thus, the output of block 55, not the appearance of the signal SI.

Every parish code C of 16 units in a row on the output unit 55 is given clock pulse C, arriving at the first input of the synthesizer 56 frequencies, the signal SI is the frequency control unit 56, own stability which is 10-5. The synthesizer 56 frequency outputs: the first output clock pulse frequency of 2.56 MHz to fill discharges foster registers 57, 58 pulse codes from the second output signals Uvydfrequency of 160 kHz, with the third output sinusoidal oscillations corresponding to the carrier frequency to the third input of the block 50. With shaper 53 pulse codes of the first and third channels fill the digits: the first 16 pulses of the code of the first signal and from the 17th to the 32nd pulse code of the third signal. With shaper 54 pulse codes of the second and fourth signals fill the digits: the first 16 pulses of the code of the second signal and from the 17th to the 32nd pulse code of the fourth signal. Codes with foster registers 57, 58 are in parallel form in the DAC 59 your channel, which convert them into analog audio signals, which after the passage of the filter 61, the sound of the howling frequencies are amplified in the amplifiers 62 power and fed to the speaker 63. Changing radio stations is with block 49 management issue with a respective bias voltage in block 50 radio reception.

The operation of the system.

The sound vibrations are accepted by the receivers 1 sound, amplified and converted ADC 3 in 16-bit codes. With ADC 3 codes received in the receiving registers 33 /5/ shaper 5 group signal forming group signal composed of three parcels: a 16-bit code C, 16-bit codes of the first and second signals and 16-bit code signals of the third and fourth /2/.

Unit 5 converts the parallel codes in a consistent and replaces characters units with pulses on the positive and negative presinusoidal. The carrier frequency of 38.4 MHz modulated sinusoidal oscillation amplitude modulator 10 is suppressed carrier and filtered lower side frequency, the upper side frequency 40,96 MHz is amplified and radiated in the air, occupying a strip of 82 Hz. In a digital receiver unit 49 of the control unit is configured 50 reception signal to the desired radio channel and receives at the same time four monaural program or two stereo /or one quadrophonics program/. Radio signals are detected by block 52, the shapers 53, 54 return view units in the codes from polyinosinic in pulses. The C code is allocated BL is com 55, the pulses from which adjust the frequency of the frequency synthesizer 56 to the frequency of the transmitting side. Beep codes 1 and 3 are received in the receiving register 57, codes of signals 2 and 4 are received in the receiving register 58, with which they are issued synchronously in DAC 59. To listen to the stereo send the user the switch 60 connects the first and second signals, or 3 and 4 signals to the inputs respectively of the blocks 61. To listen mono program, the user connects the corresponding switch 60 corresponding DAC 59 to the block 61 filters the sound frequency. Amplified audio signals are reproduced by the loudspeaker 63. The proposed broadcasting system solves the problem of allocation of frequency resources, as the band occupied only 82 Hz, reduces the energy consumption of the transmitter: when the band 82 Hz need a lot less transmit power than the radiation of the carrier and two side frequencies, increases immunity: frequency spectrum interference wide, while the share of 82 Hz will have a negligible part of the energy of the noise to the same sinusoidal signal is least subject to distortion, helps electromagnetic compatibility: narrow band promotes better post frequency, the transfer of four broadcast programs on the same channel in parallel allows to reduce the power consumption of the transmitters of the state network happy is vesania four times you can reduce and eight times/.

Sources used

1. Patent No. 2048704 C1, CL NN 5/00, bull. No. 32 of 20.11.95, prototype.

2. Everyland, Vgusseinov. System of automatic control in video recording devices. M., 1988, p.119 is, s fig.5.10.

3. Radio transmitting devices. Mussomeli and other M, 1981, s-235.

4. Radio communication, broadcasting and television, edited by Adertising. M., 1981, p.146.

5. Vthburny, Vchdno. Amplification and pulse technique. M., 1981, s.

6. Digital integrated circuits. The Handbook. Minsk, 1991, s, 231, 246.

The broadcasting system containing on the transmission side first to fourth channels of signal processing, each of which includes the serially connected receiver and audio amplifier audio frequency, connected in series coding block containing four analog-to-digital Converter (ADC), and the shaper group signal, connected in series generator of sinusoidal oscillations and the frequency divider, the first output of which is connected in parallel to the control inputs of the four ADC, the information input of each ADC is connected to the amplifier output audio frequency of that channel, the outputs of the ADC are connected to the corresponding first to fourth information input shaper group signal, from the first to the fourth the control inputs of which are connected sootvetstvenno is to 1-4 outputs of the frequency divider, a radio transmitter comprising series-connected generator carrier frequency, the input of which is connected to the second output of the generator of sinusoidal oscillations, the amplitude modulator, the second input is connected to the output of the shaper group signal, and an output amplifier, each ADC includes serially connected controlled voltage divider, a block of keys, the matching amplifier, the amplifier and piezoelectric deflector, includes emitter of the pulse led, a slit aperture and a microobjective connected in series to the first decoder, the encoder and a second decoder, the outputs of which are connected to respective inputs of the block of keys and to the corresponding inputs of the first decoder, the information ADC input is the input of the control divider voltage, managing input is the input pulse of the led outputs of the ADC are the first 16 outputs of the encoder, the shaper group signal contains four channels, each of which is connected in series includes a receiving register, the block elements And the first element OR the first and second valves pulses from the first to the third keys, connected in series shaper pulses and the pulse counter, second, third and fourth elements OR delay element, the first and W is Roy output keys informational inputs channels are first to fourth inputs of the former (group signal, the output of each channel are the outputs of the first element OR the outputs of the first and third channels are connected to first and second inputs of the second element OR the output of which is connected to the first input of the third element OR the output of which is connected to the control input of the first output switch, the outputs of the second and fourth channels are connected to first and second inputs of the fourth element, OR whose output through delay element connected to the control input of the second output switch, the outputs of the two output key are combined and the output of the shaper group signal, the first group of outputs (1-16) of the first pulse distributor is connected to the second inputs of the block elements And the first channel, the second group of outputs (17-32) of the first pulse distributor is connected to the second inputs of the block elements And the third channel, the last 32-th output of the first pulse distributor is connected to the second control input of the first key, the output of which is connected to the first input of the pulse distributor, the first group of outputs (1-16) of the second pulse distributor is connected to the second inputs of the block elements And the second channel, the second group of outputs (17-32) of the second pulse distributor is connected to W is the second inputs of the block elements And the fourth channel, last exit 32 of the second pulse distributor is connected in parallel to the second control input of the second key and the first control input of the third key, the second key is connected to the second input of the pulse distributor, the output of the pulse shaper is connected to the second input of the third element OR control inputs of the former (group signal are first combined control inputs four receiving registers, connected to the first output of the frequency divider (160 kHz), the second combined signal inputs of the first and second keys, connected to the second output of the frequency divider (2,56 MHz), and the third combined signal inputs (2,56 MHz) of the first and second output switches, the fourth signal input (2,56 MHz) the third key at the receiving side includes a digital receiver, comprising bipolar amplitude detector, the first and second pulse shapers, the input of the first pulse shaper connected to the first output of the bipolar peak detector to the second input of which is connected to the input of the second pulse shaper, four digital-to-analogue Converter (DAC) and two channels, each of which includes a filter connected in series audio frequency power amplifier and the loudspeaker, characterized in that on the transmission side is each ADC introduced a source of positive reference voltage, the output of which is connected to the second inputs of the amplifier and piezoelectric, a source of negative reference voltage, the output of which is connected to the third inputs of the amplifier and piezoelectric, and the line of multielement photodetector containing a corresponding number of photodetectors, an input window through which the reflector piezoelectric optically connected to the emitter outputs of the photodetectors are connected to respective inputs of the first decoder, the former group signal output of the pulse counter is connected in parallel to the first control inputs of the first and second keys to its control input and to the second control input of the third key, the amplitude modulator of the transmitter is made of series-connected ring modulator, a first input which is the input the amplitude modulator, the second entrance it is a control input of the amplitude modulator and bandpass filter whose output is the output of the amplitude modulator, at the receiving side in the digital receiver put the power control unit receiving a signal, the first input of which is connected to the antenna, the second group of inputs connected to the first group of outputs of the control unit, the radio frequency amplifier, whose input is connected to the output unit of the reception signal, the output is connected to the input of dogpole the CSOs of the amplitude detector, entered serially concatenated block allocation sync (SI) and the frequency synthesizer, the first input unit of allocation C is connected to the output of the first pulse shaper, a second input connected to the output of the second pulse shaper, the first input of the frequency synthesizer is connected to the output of the block allocation of SI, the second group of inputs is connected to the second group of outputs of the control unit, introduced the first and second reception registers, each of which contains 32 bits, the information input of the first output register connected to the output of the first pulse shaper, the information input of the second output register connected to the output of the second pulse shaper, the first control inputs of both foster registers are combined and connected to the first output of the frequency synthesizer to the second output of which is connected to the second control inputs receiving registers, the third output of the frequency synthesizer is connected to the third input of the reception signal, the input of the first DAC is connected to the outputs of the bits from the first to the 16th of the first output register, the input of the second DAC connected to the outputs of the discharges from the 17th to the 32nd of the first output register, the third inputs of the DAC is connected to the outputs of the first through 16th bits of the second output register to output bits 17-32 which is connected to the fourth inputs of the DAC, and put h is push switch, the outputs of the first and third DACS are connected to the inputs respectively of the first and third switches, the outputs of which are combined and connected to the filter input sound frequency of the first channel, the outputs of the second and fourth DAC connected to the inputs of the second and fourth switches, the outputs of which are combined and connected to the filter input sound frequency of the second channel, the power allocation C includes five digit pulse counter, the item is NOT, first and second diodes, the counting input of the pulse counter is an information input unit selection SI, managing input which is the input of the first diode, the output of which is connected to the control input of the pulse counter, the output of the high-order bit which is the output of the block and through a second diode connected to the output element, the output of which is connected to the control input of the pulse counter and the input element is NOT connected to the counting input of the counter pulses, the control inputs of all DAC combined and connected to the first output of the frequency synthesizer.



 

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28 cl, 11 dwg, 1 tbl

FIELD: physics; acoustics.

SUBSTANCE: invention relates to sound broadcasting and sound accompanying in television and can be used in designing sound broadcasting networks. Data transmission system for sound broadcasting in digital format with compression on main channels is designed for transmitting analogue signals for sound broadcasting to main channels in high-frequency transmission systems, including a reference circuit for the structural circuit of main sound broadcasting with a terminal transmitting point, in which signals are modulated to transmit them into the high-frequency spectrum of the transmission system, and a terminal reception point, where high-frequency signals are demodulated to extract the sound broadcasting signal. The reference circuit, which is designed for transmitting sound broadcasting signals over the main network in digital format in a standard bit transfer rate of 2048 kbps, contains 1 to 2 stereo channels or, respectively from two to four monochannels, corresponding to analogue monochannels with frequency band of 40 to 15000 Hz transmit from more than six channels in digital format, corresponding to analogue channels with frequency band of 40 to 15000 Hz, through a method of compressing the frequency spectrum and introducing quantisation levels into the bit transfer rate of digital transmission systems.

EFFECT: increased number of transmission channels in bit transfer rate of 2048 kbps.

4 dwg

FIELD: information technology.

SUBSTANCE: invention relates to buffering packets of a media stream during transmission from a transmission device to a receiving device. Media packets are generated from at least one type of media information in a stream generator; at least one transmission frame is generated based on transmitted media packets; transmitted packets are generated from at least one transmission frame and a transmission schedule is generated for transmitted packets. In addition, the first and second steps of hypothetical decoding are executed. The first step of hypothetical decoding is executed in accordance with the transmission schedule, and involves buffering the transmitted packets in accordance with the transmission schedule in the first buffer for hypothetical decoding and output of packets from the first buffer for hypothetical decoding based on the transmission frame. The second step of hypothetical decoding involves controlling occupance rate of the first and second buffer for hypothetical decoding by controlling at least one of the following: operation of the stream generator, generation of at least one transmission frame, transmission schedule.

EFFECT: more efficient buffering of media stream packets.

20 cl, 7 dwg

FIELD: physics, communication.

SUBSTANCE: invention is related to technologies of content recording. Method is suggested for content recording, where the following takes place: record document is received through the network, which describes content element, but does not describe whether content element is available for recording and how content element must be recorded, moreover, record document is generated from text description of content element and includes one or more word from mentioned text description, besides text description does not include previously configured record document, electronic program reference (EPR) data are requested to identify whether content element described in record document is available for recording without user intervention, if yes - how this content element must be recorded; data is checked on client status, which described conventional client access rights, in order to identify whether content element recording is permitted for this client with application of digital rights control; and if content element is available and recording is permitted, then link is introduced into record list, in order to cause realisation of this content element recording without user intervention.

EFFECT: improved functional capabilities available to user, such as possibility to change over from old client to new client, without manual replacement of client status data from old client to new client, remote initiation of content record without provision of connection with the client itself.

31 cl, 8 dwg

FIELD: physics; communication.

SUBSTANCE: invention relates to transmission of data to a mobile data processing unit. Data are received by a digital audio and/or television receiving device (100), where the data are contained in traffic of digital audio and/or television signals. The data are then extracted from the traffic of digital audio and/or television signals and electromagnetic signals are transmitted by the digital audio and/or television receiving device (100) so as to transmit data extracted from the digital audio and/or television receiving device (100) to a mobile data processing unit (200). The extracted data are transmitted from the digital audio and/or television receiving device (100) to the mobile data processing unit (200) in response to periodic queries from the mobile data processing unit (200) to the digital audio and/or television receiving device (100).

EFFECT: provision for additional data provider and mobile unit user with proportional capacities to act on data, which are currently being transmitted to the mobile unit.

24 cl, 5 dwg, 2 ex

FIELD: technology for simultaneous broadcasting radio-transmission of signals with analog modulation and of digital transmission signals.

SUBSTANCE: in accordance to the invention, amplitude-modulated signal of simultaneous broadcasting radio-transmission, which incorporates digital transmission signal and analog transmission signal in one transmission channel, is characterized by the fact that one side band of carrier of signal of simultaneous broadcasting transmission is modulated by digital transmission signal, and another band is modulated by correcting signal, which ensures provision of analog transmission signal of waveform envelope for demodulation. Generator of amplitude-modulated signal is intended to be used for generation and transmission of aforementioned signals.

EFFECT: creation of method for simultaneous transmission of digital and analog signals through a single channel.

4 cl, 2 dwg

FIELD: communications.

SUBSTANCE: in different types of broadcasts, with different levels of coverage in a wireless broadcast network, each base station processes data for global transmission in accordance with the first mode (or coding and modulation scheme) for generating data symbols for global transmission and processes data for local transmission in accordance with the second mode for generating data symbols for local transmission. The first and second modes are selected based on the desired coverage for the global and local transmission, respectively. The base station also generates control signals and additional service information for local and global transmission. Data, control signals and additional service information for local and global transmission are multiplexed in their transmission intervals, which can be different sets of frequency sub-ranges, time segments or different groups of sub-ranges in different time segments. More than two types of transmissions can also be multiplexed and transmitted.

EFFECT: design of a wireless broadcast network, which can efficiently transmit different types of information with various fields of coverage.

59 cl, 13 dwg

FIELD: electricity.

SUBSTANCE: invention is related to the field of electrical engineering, in particular, to borehole telemetering systems for transfer of signals between surface device and borehole instrument installed in borehole. Wired drill pipe is suggested for drilling stem of borehole instrument installed in borehole that penetrates geological layer. Wired drill pipe includes drill pipe, cable and wire holder. Drill pipe is provided with slot in its end. Slots are able to receive at least one transformer. Drill pipe has internal surface that forms channel for flow of borehole mud through it. Cable passes from transformer into channel of drill pipe. Wire holder is located on internal surface of drill pipe. Wire holder is intended for cable fixation in it.

EFFECT: reduction of probability of electric faults and/or failures because of proper contact between neighbouring pipes.

37 cl, 51 dwg

FIELD: information technologies.

SUBSTANCE: invention refers to method of control of decoding of program traffic set received by receiving system. Method of control of decoding of program traffic set received by receiving system implying that sequence of messages is received in conventional access subsystem (9, 10) comprising the specified receiving system, and each message is associated with one of coded program traffic set and represents information return enabling decoding of associated coded traffic by at least one decoding module (12) within receiving system. It is detected whether messages received within certain interval are associated with various coded program traffic set, and at least one of requests presented by messages received within certain interval is rejected, if number of various coded program traffics with which these messages are associated, exceeds preset value.

EFFECT: creation of receiving system, portable protector which enables program traffic provider to control program traffic set to which user of receiving system simultaneously addresses.

16 cl, 2 dwg

FIELD: physics; communications.

SUBSTANCE: preferred variant of this method involves reception of first data on first broadcast channel in receiver, playback of the first data, reception of second data on second broadcast channel in the receiver and storage of the segment of received second data, if the second data are received during playback of the first data. The stored segment is played back after playing back at least, part of the first data and the received second data are played back after playback of the stored segment, where the playback speed of the stored segment is different from the playback speed of the received second data.

EFFECT: possibility of simultaneous reception data broadcast from two or more broadcast channels for playback or storage.

53 cl, 18 dwg

FIELD: information technologies.

SUBSTANCE: in broadcasting medium that contains broadcasting network and terminal, broadcasting network has object of Broadcasting Service Application (BSA), object of Broadcasting Service Distribution (BSD) and object of Broadcasting Service Management (BSM), at that method of interobject connection comprises performance of registration process by terminal for obtainment of group key for terminal on completion of registration process, performance of process by terminal for connection to service for request of connection to service, and reception of Rights Object by terminal in respect of content from message, which is received in response to request, on the basis of received group key, obtainment of traffic key with application of RO, if message is accepted with traffic key on completion of process of connection to service, reception of coded content in terminal, and decoding of coded content with application of traffic key.

EFFECT: provision of content protection in broadcasting medium in interobject connection system.

35 cl, 11 dwg

FIELD: physics, computer technology.

SUBSTANCE: invention refers to the sphere of digital television immediately dealing with systems providing for update of digital television receiver software. The proposed method of digital television receiver software update envisages the following: service software multiplexing into a traffic flow under a protocol pre-defined; retrieval of the service software data from the traffic flow by the digital television receiver and data storage; resetting the digital television receiver to enable receipt of the opposite side interface function addresses by the software of the digital television receiver and the service software; updating (via the software of the digital television receiver and the service software and in accordance with the addresses to have been retrieved) the default function addresses of the service software interface and the digital television receiver software.

EFFECT: independent update of service software whenever required without the digital television service provider having to particularly update terminal software.

10 cl, 4 dwg

FIELD: physics, communication.

SUBSTANCE: invention is related to transmission of information in global distribution network, such as Internet. Method for sending of information to target mobile station in anticipation mode includes definition of whether information should be sent in the form of short data batches (SDB) messages, and information sending in the form of SDB not waiting for reset of traffic channel.

EFFECT: development of mechanism for determination of messages to be transmitted in the form of SDB, so that no time-sensitive messages are delayed.

24 cl, 12 dwg

FIELD: physics, communications.

SUBSTANCE: invention concerns digital broadband data transfer systems, particularly decoding of frame error correction of multiple-protocol encapsulation (MPE-FEC) in handheld digital video broadcasting system (DVB-H). Invention claims method and device for MPE-FEC frame decoding in DVB-H. Filtration of packet identification (PID) is performed in TS packet received over wireless network to identify TS packet, and table ID is detected by data heading information intended for identification of section data type. If section data are MPE section, then the frame is buffered. If after IP datagram storage for last MPE section some part remains in data area, then remaining part is augmented with zeros. If section data are MPE-FEC section, then frame is buffered based on parity data obtained from MPE-FEC section.

EFFECT: efficient method of MPE-FEC frame decoding in handheld DVB-H for reception of transport stream (TS) packet and Internet protocol (IP) datagram reconstruction.

18 cl, 12 dwg

FIELD: physics; communication.

SUBSTANCE: invention relates to transmission of data to a mobile data processing unit. Data are received by a digital audio and/or television receiving device (100), where the data are contained in traffic of digital audio and/or television signals. The data are then extracted from the traffic of digital audio and/or television signals and electromagnetic signals are transmitted by the digital audio and/or television receiving device (100) so as to transmit data extracted from the digital audio and/or television receiving device (100) to a mobile data processing unit (200). The extracted data are transmitted from the digital audio and/or television receiving device (100) to the mobile data processing unit (200) in response to periodic queries from the mobile data processing unit (200) to the digital audio and/or television receiving device (100).

EFFECT: provision for additional data provider and mobile unit user with proportional capacities to act on data, which are currently being transmitted to the mobile unit.

24 cl, 5 dwg, 2 ex

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