KR19990002047A - Information transmission and reception extension device and expansion method - Google Patents

Abstract

The present invention relates to an information transmission and reception extension device and an extension method for transmitting teletext information by detecting a dark line of an image by extending a method of carrying various information carried by a current broadcasting station in an existing limited definition section.

Conventional teletext (TXT) information transmission is superimposed on a basic data transmission line (VBI), which is a section without a video of a channel to be transmitted by a broadcasting station, so that TXT information of a defined section without a video of the channel is TXT start page. It transmits by rolling periodically from Page to the last page provided by the broadcaster. This means that the definition of the sending range is limited in order to send increasing information, depending on the amount of TXT pages provided for transmitting the information. There is a problem to be asked.

The present invention not only carries information in a basic data transmission line (VBI) section for a signalless line in teletext information transmission, but also transmits by overlapping extended TXT information by carrying teletext information in a signalless line and receiving the received basic information. It detects the information of VBI section and extended TXT information, and uses the information on the detected horizontal line to output the data on the corresponding line of the image data to the information without image, that is, black level, so as not to affect the actual image. The video signal of is to be output through the screen, so that more teletext information can be transmitted and received.

Description

Information transmission and reception extension device and expansion method

The present invention extends the method of transmitting various types of information (TXT) carried by the current broadcasting station in the existing limited period of time to detect the dark line of the image and to transmit the extended information for transmitting TXT information on the line. It relates to a transmission and reception expansion device and an expansion method.

1 is a diagram illustrating a TXT information transmission line carried on a current broadcast signal, and a section in which actual text information is displayed from basic V-Sync is defined to a horizontal line 6 to 23 lines. The horizontal 16 lines carry VPS (Video Program System) data, the horizontal 23 lines carry Wide Screen Signaling (WSS) signals, and other TXT information is basically loaded.

FIG. 2 is a diagram showing the TXT data form of packets (0 to 24) displayed on one horizontal line currently transmitted by a broadcasting station, and includes a color burst signal following horizontal synchronization, followed by a CRI. (Clock Run In) data is input to synchronize the text signal decoding in the TXT decoding unit, and then a Framming Code is transmitted. This is used as a synchronization for TXT information discrimination and byte-based data detection in the TXT decoding unit. The magazine number (Magazine + Row No) and the packet number (Packet No) are subsequently transmitted, and the 40 character codes and control data to be actually displayed are transmitted from the broadcasting station. Basically, it is sent as NRZ (Non Return to Zero) data, the MAX level of the data should satisfy 66.6% of the white signal level, and the MIN level is the same as the Black Level.

A configuration of a conventional TXT transceiver is described below with reference to FIG. 4.

And a transmitter 10 for transmitting information to be sent by a broadcasting station, and a receiver 30 for receiving the transmitted information and displaying the information on a screen.

The transmitter 10 includes a broadcasting station studio 1 for outputting information to be transmitted, a page generator 2 for editing TXT information to be transmitted by the broadcasting station, and the TXT information in a basic VBI (data transmission line) section. A computer (3) for processing information, a TXT encoder (4) for encoding the superimposed TXT information in a VBI section without a video of a channel, and the encoded TXT information for a broadcasting station. A superpositioner (5) superimposed on a VBI section without a video of a channel to be transmitted in the studio (1), a transmitter (6) for transmitting a video signal and an audio signal,

The receiver 30 includes a receiver 11 for receiving a transmitted video / audio signal, an audio demodulator 12 for outputting a demodulated audio signal from the received signal to a speaker 13A built in a TV, and The image demodulator 14 outputting the demodulated CVBS video signal from the signal, and the color applied to the RGB switch unit 16 by decoding the demodulated CVBS video signal from the image demodulator 14, converting the signal into an RGB signal. Decoder unit 15, RGB switch unit 16 for switching the applied RGB signal to be displayed on TV screen 13 by the control signal of microcomputer 20, and text information from the CVBS video signal is detected and processed. A signal processing section 17, a page storage section 18 for storing text information processed by the signal processing section 17, page by page, and converting the page contents into RGB signals and applying them to the RGB switch section 16. To the character generator 19 and the remote controller 21 signal by the user This is composed of a microcomputer 20 for controlling the text R.G.B signal to be displayed on the TV screen (13).

Referring to Figures 3 to 4 with respect to the conventional TXT transceiver configured as described above are as follows.

3 is a diagram illustrating TXT data types of packets 25 to 31 that are not directly displayed on a screen among TXT data, wherein packets 25 to 28 are extended packets associated with the corresponding page, and 29 packets are associated with a magazine. Data, 30, 31 packets consist of data for the TXT service. Each packet has a designation code added as compared to the data type shown in FIG. 2, and the disposition code is sequence data for up to 16 packets associated with the corresponding page. Each packet data transmits a lot of information as the TXT broadcast level is UP.

4 shows a TXT transceiver. First, in a signal applied from the broadcasting station studio 1 of the transmitter 10, an audio signal is applied to the transmitter 6, and a video signal is superimposed on the TXT information through the overlapper 3. Is applied to the transmitter 6.

The TXT information to be sent by the broadcasting station is edited using the page generator 2, and the edited TXT information is processed by the computer 3 so as to be loaded into a basic VBI section without a video of the TXT encoder. It is applied to the part (4).

When the TXT encoder 4 encodes the applied TXT information and applies the superimposed data to the supervisor 5, the supervisor 5 superimposes the video signal together with the video signal in the VBI section, in which there is no video of the channel to be transmitted by the broadcasting station. And propagates through the TV transmitter 6.

The signal propagated as described above holds a signal transmitted from a broadcasting station by the high frequency receiver 11 of the receiver 30, and the received signal is demodulated by the voice demodulator 12 into a voice signal and built into the TV. The CVBS video signal, which is outputted to the video demodulator 14 and is demodulated by the video demodulator 14, is applied to the color decoder 15 and the signal processor 17.

The demodulated CVBS video signal is input to the color decoder 15 to convert the actual video into R.G.B and applied to the R.G.B switch section 16.

The signal processor 17 detects the TXT information carried in the VBI section from the demodulated CVBS image signal and stores the TXT information in the page memory unit 18. When the user wants to view a desired page using the information, the TXT character generator ( In 19), the text information is output as RGB and applied to the RGB switch unit 16.

When the user wants to view the text information, the TV microcomputer 20 controls the R.G.B switch unit 16 so that the text R.G.B signal can be displayed on the TV screen 13.

As described above, the TXT information transmission in the conventional information transmission and reception apparatus loads information only in the basic VBI section without a video of a channel, which is a defined section, and transmits the information by rolling from the TXT start page to the last page provided by the broadcaster periodically. However, this is because the definition of the transmission section is too limited to send increasing information, and it requires a long time according to the amount of TXT pages provided, and thus there is a problem that it is not possible to expect diversification of information according to time saving.

In order to solve the above problems, the information transmission and reception apparatus of the present invention not only carries TXT information in a basic VBI section but also can carry TXT information in a line without an image of the vast amount of information necessary for various information expressions. By sending and receiving TXT method, it is possible to send and receive more information at the same time, and to send and receive more information as well as defined information so that it can send / receive by defining other information so as to diversify and improve information efficiency. It is in a ship.

1 is a diagram illustrating a general teletext information transmission line.

2 is a diagram illustrating a teletext data type of a packet displayed on one horizontal line in general.

3 is a diagram illustrating a teletext data type of a packet that is not displayed on one horizontal line.

Figure 4 is a block diagram of a conventional teletex transceiver

5 is a block diagram of a teletext transceiver of the present invention

6 is a detailed configuration diagram and a connection diagram of a signal processor in the receiver of the present invention;

7 is a diagram showing the teletext data type of an extended packet not displayed on one horizontal line of the present invention.

The configuration of the information transmission and reception extension method and apparatus of the present invention will be described with reference to FIGS. 5 and 6.

Means (40) for superimposing the TXT information of the extended TXT information and the basic VBI section on the video signal, and receiving the extended TXT information and TXT information from the transmitted video signal so as not to affect the actual video signal. And means 60 for displaying.

On the other hand, the transmission means 40 is a broadcasting station studio 31 for applying the video and audio signals to be sent from the broadcast station, a line signal detection means 32 for detecting the presence or absence of a video signal in line units of the video signal; A delay unit 33 for delaying the video / audio signal for a predetermined time and outputting it to the transmitter 38, a page generating unit 34 for editing page-by-page TXT information to be transmitted by a broadcasting station, and the edited basic VBI Signal processing means (35) for processing information to be loaded not only on the section but also on the line without signal applied from the line signal detecting means (32) to apply to the TXT encoder (36); The TXT encoder unit 36 encoding the superimposed TXT information so that the superimposed means 37 can be superimposed on the superimposing means 37, and the TXT information through the TXT encoder unit 36 is superimposed on a signal in which video and audio are delayed by one field. Output to 38 Is comprised of a superposition unit 37 and a transmitter 38 for transmitting,

The receiving means 60 includes a receiver 41 for receiving the transmitted signal, a voice demodulator 42 for demodulating the received signal into a voice signal, and a delayed time of the demodulated voice signal to the speaker 44A. An audio delay means 43 for applying, a video demodulation section 45 for demodulating the received signal into a CVBS video signal, a video delay means 46 for delaying the demodulated CVBS video signal for a predetermined period and storing the video data; And a color decoder 47 for converting the actual video signal delayed for a predetermined period into an RGB signal, an RGB switching unit 48 for switching the converted RGB signal by a control signal of a control means 52, and the demodulated signal. TXT signal processing means 49 for detecting the TXT signal from the CVBS video signal to the TXT information of the basic VBI section without the video of the channel and the information of the signalless section so as not to affect the actual video stored in the delay means 46; By the TXT signal processing means 49 A text storing means 50 for storing the output text information for each page, a character generating means 51 for converting the stored page contents to RGB, and a user's remote controller 53 selection switch to convert the text RGB and the actual image RGB signals. Consists of control means 52 for controlling each part to be displayed on the screen,

As shown in Fig. 6, the signal processing means 49 uses TXT detection control means 49A for detecting and controlling the TXT information of the basic VBI section using the demodulated CVBS video signal, and the TXT information in the extended section. Extended section TXT detection control means 49B for controlling data to be output to the black level of the imageless information on the corresponding line of the image data stored in the delay means 46 so as not to affect the detection and the actual video signal. .

The information transmission and reception extension device and method configured as described above will be described with reference to FIGS. 5 to 7 as follows.

Packets defined so far are divided into text data displayed and packets associated with the display that are not displayed. Here we define a new extension packet to send and receive more information.

In addition to loading TXT information in the existing basic VBI section, the structure is the same as that of the packets 25 to 31 that are not displayed on the screen as shown in FIG. 7, and the Fleming code for the TXT information is not defined in the structure of each packet so far. In this case, the data is defined as the data of the actual line that contains the text information data on the line without image following the magazine number and the deletion code.

In transmitting and receiving the TXT information defined as described above, as shown in FIG. 5, in the video and audio signals applied from the broadcasting station studio 31 of the transmitting means 40, the audio signal is one field in the delay means 33. The delayed signal is output to the transmitter 38.

On the other hand, the video signal is detected by the line signal detecting means 32 for detecting the presence or absence of the video signal in line units of the video signal, and the signal processing means 35 detects the presence or absence of a signal on the horizontal line of the video. ) Is applied.

When the information about the signalless line is input to the signal processing means 35, the signal processing means 35 uses a basic VBI (data transmission line) section by using the TXT information edited by the page generating means 34. The TXT information is processed and input to the TXT encoder 36 so that the TXT information can be loaded on a line without a signal detected by the line signal detecting unit 32 and inputted thereto.

When the TXT encoder 36 encodes the input extended TXT information and applies it to the overlapping means 37, the overlapping means 37 transmits the TXT to the video / audio signal delayed by one delay period by the delay means 33. The superimposed TXT information through the encoder unit 36 is superimposed together so that the final output is transmitted to the transmitter 38 and transmitted to each receiving means 40.

When the high frequency signal is received by the high frequency receiver 41 of the receiving unit 40 as described above, the signal is demodulated through the voice demodulator 42 and the image demodulator 45 and the CVBS image. The demodulated audio signal is delayed by one field by the voice delay means 43 and outputted to the speaker 44A incorporated in the TV.

On the other hand, the demodulated CVBS video signal is applied to the video delay means 46 and the signal processor 49, and the video signal delayed for one field period by the video delay means 46 is the color decoder 47. Is applied to.

At this time, the signal processing means 49 receiving the demodulated CVBS image signal detects the TXT information of the existing VBI section and the TXT information of the section without the double signal, and stores the TXT page after detecting the extended signal TXT information. In order to apply to the means 50 and at the same time not to affect the actual image is controlled to output the video output for the line without signal to the output of the actual video signal passed through the video delay means 46 at a black level,

Fig. 6 is a detailed configuration diagram of the signal processing means 49. The demodulated CVBS video signal is applied to the TXT detection control means 49A to detect the TXT information of the basic VBI section, and store it in the page storage means 50. Desired page information is applied by the character generating means 51 to the RGB switch unit 48 as the final text RGB output,

In addition, the extended section TXT detection control unit 49B receiving the demodulated CVBS video signal detects the TXT information in the extended section and stores the TXT information in the page storing unit 50, and uses the information on the detected horizontal line. The original video signal is inputted to the color decoder 47 by controlling the data to be outputted with no image information, i.e., black level, on the corresponding line of the image data stored in the image delay means 46 so as not to affect. .

The actual image is converted into a text RGB signal by the color decoder 47 and applied to the RGB switch 48, and when the user wants to see the TXT information, the control signal of the control means 52 The content is converted into the final RGB signal through the character generating means 51 and applied to the RGB switch unit 48 to be displayed on the TV screen 44.

In the present invention, not only the TXT is loaded on a previously defined section, but also the extended TXT information is added so that the video information is not affected. By receiving and displaying on the screen, it is possible to send and receive more information at the same time, so that it is possible to define and transmit different information from the existing information, thereby increasing the diversity and efficiency of the information.

Claims (5)

Means for superimposing the extended TXT information and the TXT information of the basic VBI section on the video signal, receiving the transmitted video signal, detecting the extended TXT information and the TXT information of the basic VBI section, and displaying them on the screen together with the actual video signal. Information transmitting and receiving extension device, characterized in that composed of means for A line signal detecting means 32 for detecting the presence or absence of a video signal in line units of the video signal and applying it to the signal processing means 35, a delay means 33 for delaying the video and audio signals for a predetermined period, and Signal processing means 35 for processing not only the information on the basic VBI section but also the TXT information on the signalless line by inputting information on the signalless line, and expanded using the processed TXT information. The TXT encoder unit 36 encoding TXT information and applying the same to the superimposing means 37, and the extended TXT information through the TXT encoder unit 36 to the video and audio signals delayed for a predetermined period of time, to the transmitter 38. Information transmitting and receiving extension device, characterized in that consisting of a transmitting means 40 further comprising an overlapping means 37 for outputting Audio delay means 43 for delaying the demodulated audio signal from the received signal for a predetermined period, video delay means 46 for delaying the demodulated CVBS video signal from the received signal for a predetermined period and outputting the video signal in RGB; An extended section by detecting the color decoder 47 to be converted, the RGB switch unit 48 for switching the RGB signal to be displayed on the screen by the control signal of the control means 52, and the extended TXT information from the CVBS video signal. Signal processing means 49 for controlling the actual video data stored in the video delay means 46, the page storage means 50 for storing the extended TXT information for each page, and the stored extended TXT information so that the actual video is not affected. Character receiving means 51 for converting the text to RGB, and receiving means 60 including a control means 52 for controlling each part so that the RGB signal can be output to the screen when the user wants to view the text information Information transmitting and receiving expansion device, characterized in that configured 4. The signal processing means (49) according to claim 3, wherein the signal processing means (49) detects and controls TXT information of the basic VBI section using the demodulated CVBS video signal, and detects and transmits the TXT information in the extended section. It is characterized in that the extended section TXT detection control means 49B for controlling the output of the data to the black level of the information without the image on the corresponding line of the image data stored in the delay means 46 so as not to affect the actual video signal Information transmission and reception device The packets have the same structure as the packets 25 to 31 that are not displayed on the screen, and each packet has a color burst signal following horizontal synchronization, and a CRI (Clock Run In) signal, which is a synchronization signal for decoding the text signal. Fleming code, which is undefined data for TXT information, and subsequent code having sequence data for up to tens of packets associated with the magazine number and the page, and subsequent text data for lines without video. Information transmission and reception extension method comprising the TXT data of the non-displayed extended packet defined by the data of the actual line