KR0144769B1 - Supplying apparatus of added service to tv channel transmission - Google Patents

Abstract

The present invention relates to an additional service providing apparatus for TV channel transmission, which uses DS-3 (44.736 Mbps) in North American transmission hierarchy to send to TV channel subscribers. In order to add a data channel, the information is provided to the subscriber.

Such a present invention comprises a personal computer for collecting and transmitting information such as program guides and local news for each channel; A TV and audio control board for storing, managing, and transmitting various service information provided by the personal computer; This is achieved by a TV encoder board configured to transmit service information provided from the TV and the audio control board in units of frames to DS-3.

Description

Additional service providing device for TV channel transmission

1 is a block diagram of a multiplexing / demultiplexing apparatus for transmitting a conventional TV channel.

2 shows a frame structure according to FIG.

3 is a block diagram of an apparatus for providing additional service to TV channel transmission according to the present invention.

4 is a more detailed view of the TV encoder board of FIG.

FIG. 5 shows in more detail the multiplexer of FIG.

6 shows a frame structure according to FIG.

* Explanation of symbols for main parts of the drawings

200: personal computer 201: TV and audio control board

202: TI encoder part 202e: multiplexing part

202 g: demultiplexer

The present invention is to provide a supplementary service for TV channel transmission, and more specifically, the DS-3 (44.736 Mbps) in the subsidiary transmission hierarchy is used to send to the TV channel subscriber in the TV channel transmission supplementary service providing apparatus. The present invention relates to an additional service providing apparatus for TV channel transmission, in which a DS-3 8 frame includes only video and audio signals, thereby providing various information to a subscriber by adding a data channel.

FIG. 1 is a block diagram of a multiplexing / demultiplexing apparatus for transmitting a conventional TV channel. As shown in FIG. 1, video encoding and video conversion are performed by encoding and digital conversion from a video encoder and an audio analog / digital converter (not shown). A multiplexer 102 for multiplexing the video signal and the audio signal respectively inputted through the terminal 100 and the audio input terminal 101 into a DS-3 signal (44.736 Mbps) and outputting the same to the output terminal 104; And a demultiplexer 103 for demultiplexing the DS-3 signal input through the input terminal 105 and outputting the video signal and the audio signal to the video output terminal 106 and the audio output terminal 107, respectively. .

As described above, the multiplexing / demultiplexing apparatus for transmitting the conventional TV channel is first digitally converted from the video signal and the audio analog / digital converting unit which are output from the video encoder and input to the video input terminal 100. The audio signal input to 101 is multiplexed into a DS-3 signal by the multiplexer 102 and output to the output terminal 104.

The DS-3 signal input from the input terminal 105 is demultiplexed by the demultiplexer 103 and separated into a video signal and an audio signal and output to the video output terminal 106 and the audio output terminal 107, respectively. However, since the video signal coming from the video encoder is 10.738M * 4 bits, the 4572 video data slot is allocated in the frame structure of FIG. 2, and the audio signal digitally converted through the audio analog / digital converter is a 112-bit audio data slot. 4 bits of audio control (ADCON), 56 bits of overhead at the beginning of each block, and 16 bits of other slots are empty.

There was a problem that the data is sent to the empty slot without the data.

Accordingly, an object of the present invention is to allow 8 bits to be used as data channel control bits because 16 bits are empty to send data to the empty slot in the current DS-3 frame structure of Swan in view of such a conventional problem. 8-bit, or 4-bit (4 bits preliminary) is used for actual data transmission, and the speed at which data can be transmitted is 44.7 frame rate per second by configuring 4760 slots per frame. It is to provide an additional service providing apparatus for TV channel transmission to be transmitted as .6M / 4760 = 9398.319328.

In order to achieve the above object, the present invention provides a TV channel transmission additional service providing apparatus for synchronizing 4-bit video signals, audio signals, and 4-bit service data received through a personal computer, a TV, and an audio control board to an input clock. Multiplexing means for multiplexing and transmitting to DS-3 and transmitting data and data control request signals to a TV and an audio control board; It is characterized in that it consists of a demultiplexing means for receiving the DS-3 signal and demultiplexing it and separating and transmitting the video signal, audio signal and data.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

3 is a block diagram of an additional service providing apparatus for TV channel transmission according to the present invention. As shown in FIG. 3, the third computer 200 collects and transmits information such as program guides and local news for each channel by a user. ; A TV and audio control board 201 for storing, managing and transmitting various service information provided from the personal computer 200; The TV and audio control board 201 includes a TV encoder board 202 configured to transmit service information provided on a frame basis to the DS-3 through the output terminal 203.

In the above description, the TV encoder board 202 uses the video input terminal 202a, the audio input terminal 202b, and the data input terminal 202c output from the TV and audio control board 201 as shown in FIG. The 4-bit video signal, audio signal, and 4-bit service data received through each are synchronized with the input click (CLK) and multiplexed to the DS-3 through the output terminal 202f, and the data and data control request signals are output to the output terminal. A multiplexer 202a for transmitting to the TV and audio control board through 202d; The DS-3 signal inputted through the input terminal 202k is received and demultiplexed into the video signal, the audio signal, and the video output terminal 202h, the audio output terminal 202i, and the data output terminal 202j, respectively. The demultiplexer 202g separates and transmits data.

In the above, the multiplexer 202e is encoded 4-bit image data D1 input in parallel from the video input terminal 202a and the audio input terminal 202b, respectively, as shown in FIG. And a video buffer unit 10 and an audio buffer unit 11 buffering the voice data D1 according to 1176 clocks and sorting out the data. A first buffer unit 12 for buffering 4-bit service data input from the data input terminal 202c according to 1176 clocks and outputting them serially; Second and third buffer units 13 and 14 for buffering and outputting input 4-bit control data and control audio data according to 1176 clocks, respectively; The buffered image data, audio data, service data, control audio data, data request signal and data control request signal of the TV and audio control board 201 are respectively clocked, audio clock, data clock, data control clock and audio. A logic unit 15 including first to fifth logical products AND1 to AND5 and logical OR elements OR1 that logically multiply and OR the control clocks to output one bit of data; And a fourth buffer 16 that buffers 1-bit data D1 and external 3-bit data D2-D4 provided by the logic unit 15 according to 1176 clocks and outputs the data to DS-3. .

As described above, the operation and effects of the present invention constructed as described in detail with reference to FIGS. 3 to 6 are as follows.

First, since Swan is currently communicating between the personal computer 200 and the TV and audio control board 201, various information inputs (program guide for each channel, local news, etc.) are collected from the personal computer 200. When the TV and audio control board 201 is transmitted, the TV and audio control board 201 stores and manages data received from the personal computer 200 when the TV encoder board 202, which will be described later, requests data. The TV is transmitted to the encoder board 202.

The TV encoder board 202 configures the data transmitted from the TV and the audio control board 201 into frames and transmits the data to the DS-3 through the output terminal 203.

The new frame structure is shown in FIG. 6, where A and B are used as control bits, and C and D are allocated as data.

If only C is allocated as data, 4699 bytes are transmitted per second, and both C and D can transmit 9398 bytes per second.

And, the TV encoder board 202 is shown in FIG.

In detail, first, a 4-bit video signal and an audio signal are output from the TV and audio control board 201 through the video input terminal 202a, the audio input terminal 202b, and the data input terminal 202c. When 4-bit service data is input to the multiplexer 202e, the multiplexer 202e synchronizes the input 4-bit video signal, audio signal, and 4-bit service data with a clock CLK to output terminal 202f. Multiplexed to DS-3 and transmitted to the TV and audio control board 201 through the output terminal 202d.

When the DS-3 signal is multiplexed through the input terminal 202k and input to the demultiplexing unit 202g, the demultiplexing period 202g demultiplexes the input DS-3 signal to respectively output the image output terminal 202h. ), The audio output terminal 202i and the data output terminal 202j are separated into a video signal, an audio signal and data to be transmitted.

That is, when it is described in detail, the signal (video, audio, data channel, data controller, audio controller) input to the multiplexer 202e of the TV encoder 202 is the video buffer unit 10 of FIG. The clocks are stored in the Io buffer section 11 and the first to third buffer sections 12, 13 and 14, respectively, and the clock is stored in the DS3F (DS-3 primer), that is, the fourth buffer section 16. Is input in nibble units, so the clock is subtracted from every block of overhead (from the overhead DS-3 framer). 4760-56 bits = 4704, so 4704/4 bits = clock is one bit. Send a multi primer.

The 1176 counter allows one multiframe to contain 4572 bits / 4 = 1143 clocks for video, 112 bits / 4 = 28 clocks for audio, 8 bits / 4 = 2 clocks for data control, 8 bits / 4 = 2 clocks for data, and audio large. One frame consists of 4 bits / 4 = 1 clock.

In FIG. 5, only the first data portion of the nibble 4-bit data entering the DS-3 primer, that is, the fourth buffer unit 16, is shown, and the remaining WL D2, D3, and D4 data structures have the same clock portion. Only the input portion is configured by replacing D1 with each of D2 to D4.

In order to transmit the data channel, the data control request signal and the data request signal are sent to the TV and audio substrate board 201 shown in FIG. 3, and the necessary control signals and data are transmitted by the TV and audio control board 201. It is received from and transmitted multiplexed in DS-3 framer.

As described in detail above, according to the present invention, the user can select a desired channel or schedule recording at a desired time by guiding various services (program guide, local news, etc.) to the subscriber through the TV channel.

Claims (8)

A personal computer that collects and transmits information such as program guides and local news for each channel; A TV and audio control board for storing, managing, and transmitting various service information provided by the personal computer; Apparatus for providing additional services to a TV channel transmission comprising: a TV encoder board configured to transmit service information provided by the TV and audio control board in units of frames and transmitted to DS-3. The TV encoder board multiplexes 4 bit video signals, audio signals, and 4 bit service data received through personal computers, TVs, and audio control boards to DS-3 in synchronization with an input clock. Multiplexing means for transmitting data and data control request signals to the TV and audio control board; And a demultiplexing means for receiving the DS-3 signal and demultiplexing the demultiplexed signal into a video signal, an audio signal, and data. 3. The apparatus of claim 2, wherein the multiplexing unit comprises: a video buffer unit and an audio buffer which respectively output encoded 4-bit image data and audio data serially inputted from the TV and audio control board according to a clock; A first buffer unit for buffering the input 4-bit service data according to a clock and appearing in series; Second and third buffer units for buffering the input 4-bit control data and the control audio data according to a clock, respectively; The buffered video data, audio data, service data, control audio data, data request signals of TV and Oido control boards, data control request signals are respectively clocked, audio clocks, data clocks, data control clocks, audio control clocks. An organization unit for outputting 1 bit of data by logical AND and OR; And a fourth buffer unit configured to buffer the 1-bit data and the external 3-bit data provided by the organization unit according to a clock and output the same to the DS-3. The apparatus of claim 3, wherein the clock input to the buffer unit is 1176 clocks. 5. 4. The apparatus of claim 3, wherein a clock multiplying with video data is 1143 clocks. 4. The apparatus of claim 3, wherein the clock multiplied by the audio data is 28 clocks. 4. The apparatus of claim 3, wherein a clock multiplying with service data and control data is two clocks. 4. The apparatus of claim 3, wherein the clock multiplied by the control audio data is one clock.