Method and device for the transmission of additional signals on tv and the use of the method for transmission of information

 

(57) Abstract:

The invention relates to television, and in particular to a method and device for the transmission of additional signals on television channels, and can be used for any additional video and audio signals. The technical result is more optimal use of the free capacity of the television channel for other additional signals. The technical result is achieved by the fact that on the transmission side and the reception clock signal for additionally transmitted video and audio signals are generated from the full useful life of the color video signal by counting, processing and decision-making, and on the transmission side, the two signals separately from each other before their application to the useful signal is converted to digital form, stored in the memory, are stored in the buffer and compacted. At the receiving side in a similar synchronization operations are carried out in reverse sequence. On the transmission side implementation can be carried out using additional receiving, at the receiving side using programs on your computer or additional devices in a conventional television receiver. 3 C.p. f-crystals, 6 and is rmula of the invention, and the device described in the restrictive part of paragraph 3 of the claims, with which is possible to transmit additional signals by the television channel. Such methods and devices in relation to the transfer, for example, audio signals is known from the article gassmana /Eckert "the COM-system", Funkschau, 1970, 20, pp. 689-692 and 21, pages 749-750 and in relation to the transmission of video signals from articles Langenkamp/Levi Megatexture IP for Teletext and graphics", RFE, 1994, 7, pp. 18-20.

The property is full of color signal (color signal, image signal, reject, and a clock signal) leave open the possibility of overlapping signals, which carry information (additional signals), and reception of television and radio programs should not be violated. At that time, as most publications devoted to only one type of additional signals, for example, in the work of Rudolf Moises "Television technology", Huttig, 1991, mainly 9, pages 210-227 described the transfer of multiple additional testing and information signals. The transmission of additional signals is carried out with high reliability and with the highest possible speed.

Space technology broadcasting using iaco because of the lighting zones and the high cost does not provide local services programs any opportunities. In contrast, the broadband communication network is not suitable for portable equipment and receiving stations over long distances. Infrastructure land network transmitters already contains mostly in rows, no video signals, control lines and videotext. Submission of additional services for wireless communication lines repeatedly ended in failure due to the high cost of television Studio and a shortage of frequencies.

The invention is more optimal use of the free capacity of the television channel and ensuring high reliability, baud rate, increased system flexibility, reception of a television program without interference, to impose additional signals without technical intervention in the modules of the television transmitter and compatibility of existing television systems PAL, NTSC and SECAM.

The invention solves this task by the method described in the characterizing part of paragraph 1 of the claims.

This way at the expense of its elements counting, processing, decision making is suitable for immediate sales in computers for mass information can be equipped item is with the help of which along with the console on the transmission side is also facilitated the implementation of hardware at the receiving side, described in the characterizing part of paragraph 2 of the claims.

The proper device for implementing the hardware part, which is suitable as an attachment for existing transmitters and receivers, network radio and television broadcasting, described in the characterizing part of paragraph 3 of the claims.

Preferred possible application of the invention described in item 4 of the claims.

Using the invention, the information signals are connected in the circuit overlay to transfer additional signals so that the signals can be positioned in accordance with the program in all time intervals that are free from color signals and video signals.

System for the transmission of additional signals according to the invention has several advantages. Due to the choice by counting and processing in the decision-making process about the use of time intervals for the transmission of additional signals can provide such a configuration that when taken in radio and television will not be interference. Applying and receiving additional information of the signals can be portable, cheaper additional devices. If necessary serotonergic signals is realized when they are below 20 mV, ensuring a compatible TV sets sold through a distribution network.

More in detail the invention is illustrated below by the example and with reference to relevant drawings on which is shown:

Fig. 1 - adder additional signals on the transmission side;

Fig. 2 receiver additional signals at the receiving side;

Fig. 3 is a chart of the signals with the aim of imposing a full color video signal and an additional signal for the first line type;

Fig. 4 is a chart of the signals with the aim of imposing a full color video signal and an additional signal for the second string type;

Fig. 5 is a chart of the signals to receive an additional signal for the first line type; and

Fig. 6 is a chart of signals for reception of additional signals for the second type of string.

Fig. 1 shows a controlled, line-selective generator 11 extended sequence, which produces a signal stretched sequence sp and the enable signal stretching se (Fig. 3 and 4), in which d / a Converter 8 is converted into a ternary additional signal level 0'+ and -.

The floor is narrowed in the output filter 9 to the bandwidth videocasts and in the adder 10 is superimposed on the full colour video signal of the first or second line type. Control line-selective generator stretched sequence 11 is transmitted signals, which are caused by a clock signal, introduced in the signal programmable ROM with wipe 3.2, and synchronizing signals personnel impulse BI", "line impulse ZI and a clock pulse of the system ST synchronization transmitter 12.

HR pulse BI appears at the beginning of any image synchronizing pulse ZI - at the beginning of any line. Frequency of vertical pulse and the frequency of the clock pulse system is closely synchronized in phase. Since HR pulse count number of rows is performed by rows from 0 to 624. Due to the fact that a number of the lines is similar to input additional signals structure, the line number of the string through programmable ROM with wipe 3.2 accessing the address signal programmable ROM with wipe 3.1, which generates the appropriate input signal to a corresponding lowercase structure.

In Fig. 3 signals for six information symbols included in the base clock pulse, the signals for the three information symbols - th is CLASS="ptx2">

In the form shown in Fig. 4 line type signals for six information symbols included in the base clock pulse, the signals for the eight information symbols on the back of the black, and the signal for one information symbol on the front area of the black. As the number of rows has an identical structure for these lines in the signal programmable ROM with wipe 3.1 can be written is identical to the structure of the signals. Both counter clock pulses conducted through fronts of the clock pulses of the system ST in time, i.e. 576 clock pulses on one line. A clock pulse system ST and choice of line type ZT are chosen introduced in the signal programmable ROM with wipe 3.1 signal resolution se stretching, the stretched signal sp and the clock pulse sequence, the front of the clock pulse system for the front of the clock pulse of the system and are sent to d / a Converter 8.

The ability to accurately reconcile information additional signals with the required length of time of the entire image based on high-precision output HR pulse BI line pulse ZI and the clock pulse of the system ST of the ora of the transmitter is a synchronous processor, for example, the circuit TDA a 9,257 that the purpose of further processing outputs of the full color video clock pulse processor 27 MHz line signal HS and HR signal VS with a jitter of less than 5 are not. These combinatorial signals and sequentially connected to each other in the divider clock system 6, the detector personnel pulses 5 and the detector lowercase pulses 7 so that, for example, generates a clock pulse of the system ST 9 MHz 576 fronts of clock pulses of the system on one line, the video signal line pulse ZI, which marks every first in line the front of the clock pulse of the system ST, HR pulse BI, which marks the first frame of the front of the clock pulse of the system.

Along with synchronized at the end of the call signals permissions stretching se and stretched signal SP in the available signals BI, ZI and ST for speed negotiation output from the data source, the data which should be transmitted, and the clock pulse controlled line-selective generator stretched sequence, such as schema type FIFO.

Fig. 2 shows used at the receiving side, the receiver of additional signals, and signal processing in PR is Fig. 6. This additional receiver signal consists of a synchronizer 21 receiver, line-selective reference oscillator 20 stretched sequence and the analog input block, which in turn consists of fixing scheme-level signal 13, the amplifier - limiter/offset offset color subcarrier 14, analog-to-digital Converter 15 and a digital correlator 19.

The scheme of fixing the level of the signal can be activated at the fronts of the clock pulses in the row counter clock pulses 1 and 1 and the selection of the appropriate content of the control signal and programmable ROM with erasing information 3.1. After the signal representing the sum of the full color video signal and an additional information signal, pass through a fixing scheme-level signal 13 by the amplifier-limiter 14 will be realized gain, limit and offset correction of the color subcarrier so that if additional information signal is optimally used which converts the range of the next analog-to-digital Converter, while the agitation could not be detected (Fig. 5 and 6).

This offset correction color polyporaceae 3.1. The sequence of reading results with a certain word length is supplied to a digital multiplier 16, where the output signal of the amplifier-limiter is multiplied by the reference signal in the form filed with the signals permits stretching se and stretched the sequence of sp in digital form. Work then integrates digital integrator 17. The result of integration in analog form shown in Fig. 5 and 6. Unlocking of the integrator is a permission signal integration ie, selectable from the control signal and programmable ROM with wipe 3.1, the reset - command reset integrator ir, and decision - gate pulse u. Due to the fact that when you receive used only one reference signal is stretched sequence s and se and the above-mentioned control signals ie, ir, u, ki, and ok, the line-selective reference generator 20 stretched sequence corresponds to a managed string-selective generator 11 extended sequence.

Along with the signals regenerated in the last turn, and the regenerated clock pulse, selected from the control and signal programisty data output from receiver additional signals with a clock pulse subsequent target receiver, for example, with the circuit of the FIFO type.

For synchronization of the transmitter from the full color of the synchronous signal processor 4, the divider clock system 6, a personnel detector pulses 5 and detector lowercase pulses 7 are generated signals "human impulse BI", "line pulse ZI" and "clock pulse system ST", due to which it becomes possible the accurate positioning of the additional signal in the structure of the entire television image with a precision of less than 6 NS.

In the managed string-selective generator 20 stretched sequence all the TV picture when using signals "human impulse BI", "human impulse BI", "line pulse ZI" and "clock pulse system ST", count number of rows 2 and counter clock pulses 1 fully addressed in the same time bucket, for example, III, I, na, resulting in additional signals, chosen at the discretion or programmable via programmable ROM with erasing of information can be provided in accordance with the structure of the television image. If the count number of rows 2 through line programmable ROM with erasing information 3.2 select the line type, the pam is enishida.

To synchronize the reception of the full color of the synchronous signal processor 4, the divider clock system 6, a personnel detector pulses 5 and detector lowercase pulses 7 are generated signals "human impulse DI", "line pulse ZI" and "clock pulse system ST", due to which it becomes possible the accurate positioning of the reference signal for receiving the correlation structure of the entire television image with a precision of less than 5 NS.

Using the signals personnel impulse BI", "line pulse ZI" and "clock pulse system ST", count number of rows 2 and the counter clock pulses 1, it is possible to perform the complete addressing all of the television image in the line-selective reference generator stretched sequence, resulting in additional signals, chosen at the discretion or programmable via programmable ROM with erasing information in the structure of the television image can be taken digital correlation receiver 19.

With the same accuracy of the generated control signals "impulse commit ki", "correction signal offset of the color subcarrier ok", "clock pulse system for analog-to-digital conversion is ugratara in the original position ir" and "gate", are necessary for the input stages, analog-to-digital Converter and digital correlation receiver.

The commit scheme-level signal 13, synchronized pulse commit ki, allows optimal handling a mixture of full-color video signal and the additional signal. The amplifier-limiter/offset corrector color subcarrier 14 amplifies the mixture in the input stages so that when the clock pulse level full color video signal, an adjustable signal "adjusting the color subcarrier offset" will rise to the mean value of the RC. In accordance with the level of the additional signal here is this increase that is optimal use of input conversion range of the analog-to-digital Converter, including possible noise interference. The limiting amplifier protects the analog-to-digital Converter from damage at the time when transmitted chromaticity and brightness.

The transmission of additional signals is performed using bi-phase signals so that in the process of receiving and inaccurate when fixing the level of the signal and the correction signal offset of the color subcarrier for repeat errors to the level of the additional signal a few mV.

The programmability of the system for the transmission of additional signals allows easy coordination with systems SECAM, NTSC, PAL and PALplus.

The signals personnel impulse BI", "line pulse ZI" and "clock pulse system ST" are both on the transmitting and the receiving side in order to harmonize the speed between the source and the transmission system or transmission system and the target receiver, and also with the purpose of the framework and warnockii synchronization.

METHOD AND DEVICE FOR THE TRANSMISSION OF ADDITIONAL SIGNALS ON TV

List of used symbols

1. Counter clock

2. Count number of rows

3.1. On the transmission side: signal programmable ROM with wipe. At the receiving side: control and signal programmable ROM with wipe

3.2. String programmable ROM with wipe

4. Synchronous processor

5. The personnel detector pulses

6. The divider clock system

7. The detector lowercase pulses

8. Digital-to-analog Converter with level setting

9. Output filter

10. The adder

11. Managed line-selective generator extended serial
14. The amplifier-limiter

15. Analog-to-digital Converter

16. Digital multiplier

17. Digital integrator

18. Solver

19. Digital correlator

20. Line-selective reference generator stretched

21. The synchronizer receiver

BI Human impulse

ZI Line pulse

ST Clock pulse system

se the enable Signal stretching

SP Signal is stretched

ki is the Momentum of a commit

ok correction Signal offset of the color subcarrier

ie the enable Signal integration

se Resolution stretching

sp Signal stretching

u Gate pulse

ir Signal return of the integrator to its original position

ST Clock pulse system for analog-to-digital PREOBRAZOVANIYa

1. Method for the transmission of additional signals on TV networks broadcasting and television, in which additional signals injected before sending in the absence of the image signal in a full color image signal with a temporary seal and after taking a full color image signal is separated, characterized in that on the transmitting is to generate clock pulses of the clock signal full color image signal so that that serves a full color image signal for combination with additional signals and on the basis of small pulses (ZI) by counting and processing the clock signals full color image signal output for each signal "clock pulse of the system (ST)" and "HR pulse (BI) for the transmission of additional signals, the signals comprising subject to transfer video, audio and control signals converted into digital form, write in the memory, remember in the buffer, condense and choose from a temporary seal over long periods of time in the quantum of additional signals, the selected additional signals alternately with a temporary seal supply signal headers (up: picture/sound, valid/invalid) and the marker signal image and enter in the full color image signal, preferably after narrowing lanes, with a temporary seal at the receiving side again from a full color image signal by calculating and processing the clock signals full color image signal output for each signal "clock pulse of the system (ST)" and "HR pulse (BI)" additionally the additional signals restore from a full color image signal with an additional signal by fixing, limitations and analog-to-digital conversion, then the digital correlation and subsequent decision, the signals of the header is processed, additional signals resultnat and again divided into video and audio signals, the video and audio signals separately resultnat, converted into analog form and reproduce.

2. The method according to p. 1, characterized in that the additional input signals do not carry information ranges to the full color image signal form the signal resolution stretching (se) signals and stretching (sp), which is restored at the receiving side and complement additionally llife of pulses (ZI, ST and BI) control signals to enable integration (ie), return of integration in its original position (ir), receiving (u), pulse fixation (ki) and preferably compensate for the offset (ok).

3. The method according to p. 1 or 2, characterized in that the input additional signals in the transmitter and for the allocation of additional signals in the receiver is to install additional devices containing the address counters and the storage device, and for transmitting information-bearing additional signals in all time intervals complete the control line-selective generator extended sequence in the optional devices installed on the required periods of time all over the TV image on the basis of high-precision output HR pulse line pulse and the clock pulse of the system from a full color image signal, and additional devices in the receiver enter the digital correlation receiver, which decides on the value of received signals by using the correct time correlation of a received signal with a predefined digital value, prepared line-selective generator.

4. The method according to one of paragraphs. 1-3, characterized in that it is used for the transmission of video, audio and control signals, consisting, like the slide presentation from the changing signal frames and audio signals.

 

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7 cl, 2 dwg

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