SU1235001A1 - Device for co-transmission of television signal,television sound accompaniment signal and sound broadcasting signal - Google Patents

Abstract

The invention provides an increase in the quality of transmission of sound signals while increasing the number of channels of sound. On the transmitting side, the television signal through the ADC 1 and the prohibition block 5 enters the first futHono TDB unit of the combining (BO) 6. From the input television signal, the synchro selector 2 does not receive a sync mixture. The sync mixture through the regeneration block 3 of the synchromix enters as a control signal to the block 5 of the ban given blocking of the passage of the television signal and to the block 8 of the separation of the pulses of syi-hrosmesi. Separated sync pulses go to control unit 9. Sound signals are sent to the corresponding packing units 10. From packing units 10, information on filling each generated digital stream goes to block 11 fop 4 and turning on the type of transfer marker, and the digital streams themselves go through the corresponding memory blocks 13 on the second VO 12. S VO 12 sound signals together with the markers of the type of transmission to the post (L Vmmas iNd t

Description

1235001

They are fed to the VO 6 input, where the code 7 clock mixer 4 is input into the channel of the television signal, through the lights of the clock generator 4 through the time of the horizontal sync pulses. Sealed connection. At the receiving side, the digital signal from VO 6 is inverse transform. 2 Il.

The invention relates to a communications technology and is intended for transmission over a digital communication channel of a television signal compacted by sound signals of television and broadcasting.

The purpose of the invention is to improve the quality of transmission of audio signals while simultaneously increasing the number of channels of audio accompaniment.

Fig. 1 shows a structural electrical diagram of the transmission side of the device for the joint transmission of a television signal, sound signals of television and broadcasting; 4mg.2 - structural electrical circuit of the receiving side of the device.

The device for the joint transmission of a television signal, television sound signals and broadcasting contains on the transmitting side (Fig. 1) an analog-to-digital converter (ADC) 1, a sync selector 2, a regeneration block 3, a synchro mix, a clock generator 4, a block 5, the first block 6 combiner, code converter 7, synchromesh pulse separation unit 8, control unit 9, first, second and third consolidation blocks 10-1 ... 10-3, transmission type marker i1, the first combining block 12, first second and third blocks 13-1 .. .13-3 memory, input command switch 14, and on the receiving side (Fig. 2) contains a code converter 15, synchronization unit 16, sync pattern identification unit 17, transfer mode marker selection unit 18, transfer type identification unit 19, fill group recognition unit 19, unit 20 input marker identification, output signal generator 21, logic adder 22, prohibition block 23, digital-to-analog converter (DAC) 24, output command switch 25, first, second

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the swarm and the third block ... .26-3 of the memory, as well as the first, second and third blocks 27-1 ... 27-3 of the channel separation.

A device for joint transmission of a television signal, signals, sound accompaniment of a television and a broadcasting works as follows.

The analog television signal is fed to the first input of the A / D converter 1 (Fig. 1), which converts the television signal to digital form, and also to the input of the synchronizer 2, from the output of which the synchro mixture is fed to the input of the synchromesh regeneration unit 3, performing restoration of synchromesh in case of a fallout or distortion of individual sync pulses. The ADC I is clocked at the second input of the clock-1I pulses coming from the first output of the touch generator 4. From the output of the ADC 1, the television signal is fed to the first input of the prohibition block 5, the second input of which receives the sync mixture from the output of the block 3, as a result of which the passage the television signal through the block 5 prohibiting the first input of the first block 6 of the union during the action of equalizing pulses, personnel and horizontal sync pulses. At the specified time intervals, sound signals are input into the full digital signal instead of the television signal and are fed to the fifth input of the first merge block 6, from which a compact digital signal is fed to the first input of a code 7 converter, which converts the compact digital signal from a parallel code in serial for further transmission over the communication channel. The synchronization of the code converter 7 is performed by clock pulses arriving at its second input from the second output of clock generator A.

From the output of the synchromes regeneration unit 3, the synchromesh enters the input of the synchromesh pulse separation unit 8, the first output of which generates a sequence of equalizing pulses, frame sync pulses and unfilled digital audio signals of the horizontal sync pulses, and the second output - a sequence of sync pulses and non-digital sync pulses of the horizontal sync pulses, and the second output - a sequence of sync pulses and blank sync sync pulses, and the second output - a sync pulse sync pulses and blank sync pulses; transmission of digital audio signals. Both specified sequences arrive at the first and second inputs of control unit 9, the third input of which receives clock pulses from the first output of clock generator 4, and pulse outputs are generated at the outputs that control the transmitting part of the device during the formation of a compressed signal. In particular, the signal from the first output of control block 9 is fed to the second input of block 6 and ensures the formation of code sync groups corresponding to the leading edge of the clock signal of the television signal; the signal from the second output of block 9 is fed to the third input of block 6 and ensures the formation of an input marker, after which digital sound signals are input in the filled sync pulses, in the unfilled sync pulses

The le code sync group is entered martial 35 first, second, and the type of tracker. The final filling of the clock pulses of both the filled-HKefftix and the non-filled with the sound signals and sound signals is accomplished by the filling groups that are unused for transmitting the television signal in their structure, which is carried out on the third output of block 9.

The television sound signals (for example, in different languages), broadcasting, as well as other signals (service signals, data, etc., etc.) are transmitted in analog form to the first inputs of the first, second, and third seals 10-1. .: 10-3., Which are the standard digital stream drivers of the primary digital transmission system (PCSP), for the second inputs of which from the third output of the clock generator 4 are received clock pulses with a frequency of 2 48 HHz. In each of

Three blocks of compaction 10-1 ... 10-3 organizes from one to five channels of sound: at the same time, with a decrease in the number of sound channels, symbols of individual sound signals are introduced into the PCSP flow with a corresponding increase in redundancy, which contributes to the increase in noise immunity. channel and provides an additional improvement in the quality of audio signals. Information about the filling of each of the streams of chips from the first outputs of blocks 10-1 ... 10-3 goes to the first, second and third inputs of the block 11 for the formation of a marker of the type of transmission; This marker represents the number (option) of filling three PCBS streams and arrives at the first input of the second merge unit 12 upon a command from the fourth output of the control block 9 at the specified time point, PCS streams from the second outputs of blocks 10-1 .., 10- 3 are fed to the first inputs of the first, second and third blocks 13-1 ... 13-3 of the memory, which are recorded by so-called pulses received on their combined second inputs from the third output of the clock generator 4, Read information from blocks 13 -1 ... 3-3 memories are alternated of the signals applied to their third inputs soottego outputs switch input commands 14. O blocks 13-1 ,,. 13-3, the sound signals through the second combining unit 12 are fed together with the transmission mode marker to the fifth input of the first combining unit 6,

The compressed signal transmitted via the communication channel goes to the first inputs of the converter code 15 (FIG. 2) that converts a serial code into a parallel one, and the synchronization unit 16 that selects clock frequencies from the input digital signal and controls the operation of the code converter 15 according to its the second input, the phasing of the synchronization unit 16 is carried out by the signals of synchrogroups supplied from the compressed signal

From the second output of the synchronization unit 16, pulses with a frequency of following code groups of compressed signals

la come to the first inputs of the block

17 sync group recognition, block

18 injecting the transmission type marker, the filling group identification unit 19 and the input marker identification unit 20: the second inputs of the indicated blocks from the output of the code converter 15 receive the compressed signal received from the communication line, and the corresponding control signals are generated at the outputs receiving part of the device.

In particular, when block 17 detects a code sync group, pulses are generated at its output, which correspond to the leading edge of the clock signal of the television signal, and mean the reception equipment is synchronized both in digital and analog signals and, therefore, ensures proper separation of the digital television signal and input on the receiving side of the signals PCBS. Upon detection of the input marker, the output signal of the block 20 allows the formation of clock pulses at the output of the imaging unit 21 of the output signal from the clock pulses received at its second input.

All service signals with. the outputs of the blocks 17-21 are fed to the inputs of the logic adder 22, the output of which produces a signal equal in duration and corresponding in time to the clock pulses (both used and not using 1 m) of the television signal. This signal is fed to the second input of block 23, blocking the passage of the signal to the first input of the DAC 24, and also to the third input of the DAC 24 to restore at its output a normal amplitude ratio between the video signal and the clock signal of the television signal. The clocking of the D / A converter 24 is effected by clock pulses arriving at its second input from the second output of the synchronization unit 16. Pulses with the frequency of following the code groups of the compressed signal from the output of the output signal generator 21 also arrive at the input of the output command switch 25, which distributes them between the first, second and third blocks 26-1 ... 26-3 of memory, resulting in compressed signal into the corresponding blocks 26-1. . 26-3 memories are written characters

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the first, second and third PCSP streams transmitted during the operation of the clock pulses.

The information from blocks 26-1 ... 26-3 of the memory is read out by clock pulses with a frequency of 2048 kHz, arriving at their third part from the third output of the synchronization unit 16. The read information is fed to the first inputs of the first, second and third blocks 27-1 ... 27-3 of the channel separation, respectively, to the second inputs of which comes from the second output of the block 18, a transmission type marker that determines how PCBS signals should be decoded at the output of the blocks 27-1 ... 27-3 of the original analogue sound signals of television, or service signals, entered on the transmission side. Blocks 27-1 ... 27-3 are standard PCBS receiving equipment.

With a device clock frequency of 104 MHz, it has a minimum clock frequency for transmitting a 6.5 MHz bandwidth in a serial code of a television signal and an 8 M bit of 1M representation of samples. Three PCBS streams can be transmitted within the horizontal sync pulse duration using PCM equipment -thirty; at the same time, in each stream, up to 5-6 sound signals with a 15 kHz bandwidth or up to 10-12 sound signals with a 7 kHz band can be transmitted. At the same time, the improvement in the quality of transmission of audio signals is determined by the elimination of individual sync pulses (due to their regeneration), due to the separation of individual characters of three PCSP streams in time (alternating the input of signals from three streams), as well as using noise-resistant coding with significant redundancy while reducing the number of transmitted audio signals.

Claims (1)

Invention Formula A device for joint transmission of a television signal, sound signals of television and broadcasting, containing successively on the transmission side: an analog-to-digital converter (ADC), a prohibition unit, a first unification unit and a code converter, as well as a clock generator, the first output of which is connected to the second input of the ADC, the first input of which is connected to the input of the sync selector and control, the first input of which is connected to the first output of the clock generator, the second output of which is connected to the second input of the code converter, the first, second and third outputs of the control unit are connected to the second, third and fourth m inputs of the first combination unit, and three memory blocks, and on the receiving side serially connected code converter, prohibition unit and digital to analog converter (D / A converter), as well as a synchronization unit, the first input of which is connected to the input of the code converter second input is connected to the output of the block sync group identification, the first output is connected to the second input of the code converter, the second output is connected to the second input of the DAC, as well as to the first inputs of the sync group identification block, the input marker identification block, Which are connected to the output of the code converter, the output of the input marker identification unit is connected to the first input of the signal generator, the second input of which is connected to the second output of the synchronization unit, and three memory blocks, the first inputs of which are connected to the output of the code converter, about By the fact that, in order to improve the quality of the transmission of sound signals while simultaneously increasing the number of sound channels, a synchromes regeneration block was inserted on the transmitting side, neither sync mix pulses, input command switch, first, second, third seal blocks, transfer type marker formation unit and second combination unit, the output of which is connected to the fifth input of the first combination unit, first input connected to output of the transfer type marker generation unit, and the second , the third and fourth inputs are connected respectively to the outputs of the first, second and third memory blocks, the group of first inputs The first, second, and third compaction blocks are inputs of sound signals, the second inputs are connected to the third output of the clock generator, the first outputs are connected to the first, second, and third inputs of the transmission type marker generation unit, respectively, and the second outputs are connected to the first inputs of the same name blocks the memory, the second inputs of which are connected to the third output of the clock generator, and the third inputs are connected respectively to the first, second and third inputs of the input command switch, the input block the regeneration of the synchro mix is connected to the output of the sync selector, and the output is connected to the second input of the inhibit unit and to the input of the pulse separation unit of the synchromesh, the first output of which is connected to the first input of the input command switch, and the third input is connected to the second output of the pulse separator synchromesh, the fourth output is connected to the fourth input of the block forming the type of transfer marker, and the fifth output is connected to the second input of the switch of the input commands, the third input of which is connected to the the output of the clock generator, and at the receiving side, a block is entered for the transmission type marker, a block group identification unit, a view command switch, a logic adder and three channel separation units, the first inputs of which are connected to the outputs of the same memory blocks, the second inputs of which are connected with single-output outputs of the output command switch, and the third inputs are connected to the third output of the synchronization unit, the first input of the logic adder is connected to the output of the sync pattern recognition unit, the second input - with the first output of the selection block of the transmission type marker, the third, fourth and fifth inputs are connected respectively to the outputs of the identification group of the filling group, the identification block of the input marker and the output signal generator, and the output is connected to the second input of the inhibiting block and the third input of the DAC, the second the output of the selection block of the transmission type marker is connected to the second inputs of the first, second and third separation channels, and the output of the signal generator of the output is connected to the input of the output command switch, the second inputs of the block ka vydeleftj pervbayuschey hand ff f f f f f f TV y / Signal Signals FIG. 2 Editor V.Kovtun Compiled by L. Stasenko Tehred I. Popovich Order 2991/59 Circulation 624 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 -Proi volnstnens-printing company, Uzhgorod, st. Sch) gktna, 4 Neither the transmission type marker and the identification group of the filling group are connected to the output of the code converter. Proofreader L. Pilipenko