JPH04213984A - Transmission system and receiver - Google Patents

Abstract

PURPOSE:To retrieve and offer a character program or a page of a relating program type without designating a program number by storing the character program or page of the relating program type into a memory with priority and utilizing sent program type information so as to manage the teletext program by each program type. CONSTITUTION:The above system is provided with a storage means 10 to store the same or relevant character program or page as a program type detected by a program type detection means 9 into a memory with priority and a retrieval and offer means 11 retrieving and offering the same or relevant character program or page as the program type detected by a program type detection means 9 for the character program or page selected and displayed based on a program offer request relating to the selected and displayed character program or page.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention uses teletext using a coded transmission method on the transmission side to transmit program type information of teletext programs such as news, weather, and stocks without affecting current teletext receivers. However, on the receiving side, the received program type information is used to manage teletext programs for each program type, preferentially storing text programs or pages of related program types in memory, or specifying program numbers. The present invention relates to a transmission system and a receiving device for searching and presenting text programs or pages of related program types without any need for assistance.

0002

[Background Art] In recent years, a coding transmission method has been developed that uses broadcast radio waves to display text and graphic information such as news, weather forecasts, and stock market conditions on the screen of a home television receiver. Teletext broadcasting has been put into practical use, and television receivers with built-in receivers for receiving coded transmission type teletext broadcasting have also been developed. Hereinafter, with reference to the drawings, a teletext broadcast using the encoded transmission method and a teletext receiver using the encoded transmission method as described above will be described.

FIG. 3 shows the configuration of a conventional teletext receiving apparatus A. In FIG. 3, a is a television video signal, 1 is a character signal extracting section that extracts a character signal superimposed in the vertical blanking period from the video signal a, and 2 is a character signal extracting section that extracts a character signal superimposed on the vertical blanking period from the video signal a. perform decoding,
3 is a buffer memory section that stores only the character signals extracted by the character signal extracting section 1; 4 is a buffer memory section that stores the display data developed into character shapes in the decoding section on the screen; 5 is a video memory section that stores display data that is actually displayed on the screen, etc. in the display control section; 6 is a video memory section that stores display data that is actually displayed on the screen, etc.; 6 is a video memory section that is based on the additional sound data decoded by the decoder section 2; This is a sound generator that actually generates sound.

[0004] FIG. 4 shows signal superimposition positions of teletext broadcasting using the encoded transmission method. In FIG. 4, the teletext signal is 14H and 15H of the vertical blanking period of the television signal.
It is superimposed on H, 16H and 21H.

[0005] FIG. 6 shows the hierarchy of teletext signals of the encoded transmission system. In FIG. 6, layer 1 is a physical layer and shows the specifications of a character signal as an electrical and physical signal. TC indicates the period per 1 bit of the character signal, TC = 1/36
4fH (seconds) (fH is the frequency of the horizontal synchronization signal). Layer 2 is a link layer and character signals are treated as logical data of 1 and 0. A data line is a unit of transmission of a character signal transmitted during one horizontal scanning line period of a television video signal, and consists of a synchronization part and a data packet. A data packet refers to a portion of a data line excluding a synchronization section, and consists of a prefix, a data block, and a check code. The synchronization section consists of a clock line for bit synchronization of character signals and a framing code for byte synchronization. The check code is an error correction code that can be decoded using a majority logic circuit in units of data packets (
272, 190) is a shortened difference set cyclic code. Tier 3
mainly indicates the function of prefixes at the network layer. The prefix is data for identification and control that is attached to the beginning of a data packet, and the data block is the part of the data packet excluding the prefix and check code, and it sends out various information data. Tier 4
shows the functionality of data groups at the transport layer. A data group consists of a data group that is a group of information data transmitted by one or more data blocks. Layer 5 is a session layer that shows the structure of program data, functions for program identification control, and the like. Layer 6 is the presentation layer, which shows various presentation encoding functions, and specifies encoding for displaying characters, graphics, and expressing additional sounds.

FIG. 5 shows the structure of program management data and page data. At the beginning of the program data, program management data relating to the entire program is sent. Program management data or page data consists of a data header and several data units.

FIG. 7 shows the structure and sending procedure of a data unit. In FIG. 7, a data unit consists of a data unit identification, a data unit data length, and unit data. Data unit identification represents the function of identifying the type of data unit, and its encoded representation consists of data unit parameters. The data unit link flag indicates whether the following data unit is a continuation data unit and is to be concatenated, and the data unit data length indicates the data length of the data unit data. The data unit data is the number of data indicated by the data unit data length.

FIG. 8 shows the current data unit parameter allocation. In FIG. 8, blank spaces are unused.

FIG. 9 shows an example of encoding of current teletext broadcasting. In FIG. 9, there are two data units, and the data unit parameters are "24H" and "20H", and from FIG. 8, the two data units are "header sentence" and "20H", respectively.
This is a data unit that indicates the main text.

The operation of the teletext receiving apparatus configured as shown in FIG. 3 will be explained below.

The character signal extraction section 1 extracts the character signals superimposed on 14H, 15H, 16H, and 21H shown in FIG. 4 from the input video signal a. The decoding section 2 stores the character signals extracted by the character signal extraction section 1 in the buffer memory section 3, and also stores the character signals extracted by the character signal extraction section 1 in the buffer memory section 3.
The program data of the program number that needs to be presented is extracted from the character signals accumulated in the character signal, the character signal is decoded as shown in FIG. The display control section 4 sequentially reads out the character/figure screen information written in the video memory section 5 and outputs a display signal b. Furthermore, if there is additional sound information in the program data that needs to be presented, the decoding section 2 decodes the additional sound information and sends the sound generation data to the sound generation section 6. Outputs a sound signal.

0012

[Problems to be Solved by the Invention] However, with the configuration of the transmission system and receiving device as described above, when selecting a related teletext program or page, the table of contents screen is specified and called up, and the table of contents screen is used to select the program. The number and page number must be specified, and the text programs stored in the memory are limited to random programs or text programs with prespecified program numbers and page numbers.

[0013] In view of the above problems, the present invention provides magazine numbers,
We devised a transmission method that stipulates program type information such as program number, page number, and program type during transmission, recognizes and processes the program type information, and uses the received program type information on the receiving side to transmit teletext programs. is managed for each program type, preferentially stores text programs or pages of related program types in memory, or searches and presents text programs or pages of related program types without specifying program numbers. A receiving device is provided.

[0014]

[Means for Solving the Problems] In order to solve the above problems, the transmission method and receiving device of the present invention place restrictions on program type information, and determine from the received data unit parameter that the data unit is program type information. a program type information recognition means for recognizing the selected and displayed character program; an extraction means for extracting the magazine number, program number, page number, program type, etc. from the data unit data detected by the program type information recognition means; Alternatively, a program type detection means for detecting the program type of a page, an accumulation control means for preferentially accumulating in a memory a text program or a page that is the same as or related to the program type detected by the program type detection means; Based on a request to present a program related to the selected and displayed text program or page, a text program or page whose type is the same as or related to the program type detected by the program type detection means of the selected and displayed text program or page. It is equipped with a search and presentation means for searching and presenting pages.

[0015]

[Operation] With the above-described configuration, the present invention manages teletext programs for each program type by transmitting program type information of teletext programs such as news, weather, stocks, etc. using the received program type information. However, text programs or pages of related program types can be stored preferentially in the memory, and text programs or pages of related program types can be searched and presented without specifying program numbers.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A transmission system and a receiving apparatus according to a first embodiment of the present invention will be explained below with reference to the drawings.

FIG. 1 shows the configuration of a receiving apparatus in a first embodiment of the present invention. In FIG. 1, A is a receiving means for receiving text broadcasting using a coded transmission method, a is a television video signal, and 1 is a character signal for extracting a character signal superimposed in the vertical blanking period from the video signal a. A sampling section 2 decodes the character signal extracted from the character signal extraction section and develops it into a character figure for display; a decoder section 3 stores only the character signal extracted by the character signal extraction section 1; a buffer memory section, 4 a display control section for actually displaying the display data developed into characters and figures in the decoding section on a screen, etc., 5 a display control section for storing display data to be actually displayed on the screen, etc. a video memory section 6 for generating actual sound based on the additional sound data decoded by the decoder section 2; Program type information recognition means 8 recognizes that there is a program type information recognition means; 8 is an extraction means for extracting a magazine number, program number, page number, program type, etc. from the data unit data detected by the program type information recognition means 7; 9 is selected and displayed; program type detection means 10 for detecting the program type of the text program or page that is being detected; 10 is for preferentially storing in the memory text programs or pages that are the same as or related to the program type detected by the program type detection means 9; 11 is a program detected by the program type detection means 9 of the selected and displayed text program or page based on a request for presentation of a program related to the selected and displayed text program or page. This is a search and presentation means that searches for and presents text programs or pages that are the same as or related to the type.

The operation of the receiving apparatus configured as described above will be explained below with reference to FIG.

First, in the conventional teletext receiving process, the character signal extraction unit 1 extracts the character signals superimposed on 14H, 15H, 16H, and 21H shown in FIG. 4 from the input video signal a. The decoding section 2 stores the character signals extracted by the character signal extraction section 1 in the buffer memory section 3, and extracts the program data of the program number that needs to be presented from the character signals stored in the buffer memory section 3. The character signal is decoded as shown in 9, and the character/graphic screen information is written into the video memory section 5 through the display control section 4. The display control section 4 sequentially reads out the character/figure screen information written in the video memory section 5 and outputs a display signal b. Furthermore, if there is additional sound information in the program data that needs to be presented, the decoding section 2 decodes the additional sound information and sends the sound generation data to the sound generation section 6. Outputs a sound signal.

The program type information recognition means 7 detects the program type information. Recognition of program type information is performed using data unit parameters shown in FIG. Data unit parameters indicating program type information are hexadecimal data 20, 24, 28.
,2C,30,31,32,34,35,38,39,
Any 1-byte data other than 3B, 3C, 3D, 3E, and 3F may be used. FIG. 2 shows an example of the data group structure of program type information. From the program type information data unit recognized by the program type information recognition means 7, the extraction means 8 extracts the PB5 of the data unit of the program type information data group.
, reads the magazine number from PB6, reads the page number from PB7, and reads the program type from PB8. P
Read B9 onwards in the same way. The program type detecting means 9 extracts the magazine number, program number, and page number of the currently presented text program from the decoding section 2, and extracts the program type matching the extracted magazine number, program number, and page number from the extracting means 8. Detect more. The storage control means 10 controls the buffer memory section 3 so as to preferentially store text programs having the same or related program number or page number as the program information detected by the program type detection means 9.
control. The search and presentation means 11 selects the program type detected by the program type detection means 9 of the selected and displayed text program or page based on a request for presentation of a program related to the selected and displayed text program or page. The same or related text program or page is searched, and the corresponding text program data is passed from the buffer memory section 3 to the decoder section 2 and presented through the display control section 4.

As described above, according to this embodiment, a data unit parameter for program type information for teletext broadcasting using the coded transmission system is newly provided, and the magazine number, program number, page number, and program type of the program type information are newly provided. By transmitting such information as data unit data, the receiving side uses the received program type information to manage teletext programs for each program type, preferentially storing text programs or pages of related program types in memory. It is possible to search and present text programs or pages of related program types without storing or specifying program numbers.

[0022]

As described above, according to this embodiment, by transmitting the program type information of teletext programs such as news, weather, stocks, etc. using encoded transmission method, the received program type information can be used to manage teletext programs by program type, preferentially store text programs or pages of related program types in memory, or store text programs or pages of related program types without specifying program numbers. You can search for and present information.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a receiving device in a first embodiment of the present invention.

[Figure 2] Schematic diagram showing an example of data group structure of program type information

[Figure 3] Configuration diagram of a conventional teletext receiving device

[Figure 4] Signal superposition diagram of teletext broadcasting using encoded transmission method

[Figure 5] Configuration diagram of program management data and page data

[Figure 6] Hierarchical diagram of teletext signal using encoded transmission method

[Figure 7] Configuration diagram of data unit

[Figure 8] Current data unit parameter allocation instructions

[
Figure 9: Schematic diagram showing an example of encoding of current teletext broadcasting

[Explanation of symbols]

1 Character signal extraction section 2 Decoder section 3 Buffer memory section 4 Display control section 5 Video memory section 6 Sound generator 7 Program type information recognition means 8 Extraction means 9 Program type detection means 10 Accumulation control means 11 Search presentation means a Video signal b Display signal c Sound signal

Claims (2)

[Claims] [Claim 1] The transmitting side transmits program type information of teletext programs such as news, weather, stocks, etc. using encoded transmission system teletext, and the receiving side uses the received program type information to transmit the text. In a system that manages broadcast programs by program type, a data unit for program type information based on teletext using the coded transmission method is newly provided, and the magazine number, program number, page number, program type, etc. of the program type information are stored. A transmission method characterized by transmission as data unit data. [Claim 2] Receiving means for receiving teletext broadcasting using an encoded transmission method to which a magazine number, program number, page number, and program type of program type information are added as data unit data, and a data unit output from the receiving means. A program type information recognition means that recognizes that the data unit is program type information from the parameter, and a magazine number, program number, page number, program type, etc. are extracted from the data unit data detected by the program type information recognition means. an extraction means, a program type detection means for detecting the program type of a selected and displayed text program or page, and a text program or page that is the same as or related to the program type detected by the program type detection means with priority. Detection by the program type detection means of the selected and displayed text program or page based on an accumulation control means for storing it in a memory and a presentation request for a program related to the selected and displayed text program or page. What is claimed is: 1. A receiving device comprising: search and presentation means for searching and presenting a text program or page that is the same as or related to the selected program type.