JPH05252123A - Transmission system and reception equipment - Google Patents

Abstract

PURPOSE:To retrieve and offer a character program relating to an offered character program without directly inputting a program number in teletex. CONSTITUTION:This system consists of a tree information data unit recognizing means 7 in which the tree information of a teletex program is sent out at a sending side, and tree information is recognized from a data unit parameter at a reception side, a program and page number detecting means 8 of the character program being offered at present, a program data extraction means 9 which extracts data unit data that coincides with the program and page number program of the character program being offered at present, an accumulation control means 10 to accumulate a relational character program preferentially, a cursor display means 11 based on program instruction information, a cursor travel means 12, and an offering request means 13 for the character program selected by a cursor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention sends tree information from a sending side by using a character broadcast by a coded transmission method, and a receiving side uses the received tree information to search for and present a related text broadcast program. The present invention relates to a transmission method and a receiving device that perform

[0002]

2. Description of the Related Art In recent years, a coded transmission system capable of projecting character and graphic information such as news consisting of characters and graphics, weather forecasts, stock market conditions, etc. on a television receiver at home by using broadcast radio waves. The teletext broadcast by
A television receiver with a built-in receiving device for receiving teletext has been developed.

A conventional teletext transmission system using a coded transmission system and a receiving apparatus will be described below with reference to the drawings.

As shown in FIG. 5, in the conventional teletext receiver 15, the television video signal a is input, and the character signal extracting unit 1 produces a character signal superimposed on the video signal a during a vertical blanking period. The sampling decoder unit 2 demodulates and develops into a character graphic for display. Further, the character signal extracted by the character signal extracting unit 1 is accumulated in the buffer memory unit 3. The display data expanded into a character graphic in the decoder unit 2 is output by the display control unit 4 as a display signal b to be actually displayed on a drawing or the like, and the display data is stored in the video memory unit 5. A sound signal c is output from the sound generation unit 6 based on the additional sound data decoded by the decoder unit 2.

Regarding the teletext receiving apparatus including the above components, the relationship and operation of each component will be described below. First, as shown in FIG. 5, in the character signal extracting unit 1 from the input video signal a, the scanning line 1 in the vertical blanking period
The character signals superimposed on 4H, 15H, 16H, and 21H are extracted, and the extracted character signals are accumulated in the buffer memory unit 3 in the decoder unit 2 and the program of the program number that needs to be presented from the accumulated character signals. The data is extracted, the character signal is decoded, and the character / graphic drawing information is written in the video memory unit 5 through the display control unit 4. The display control unit 4 sequentially reads the character / graphic screen information written in the video memory unit 5 and outputs it as a display signal b. further,
If there is additional sound information in the program data that needs to be presented, the decoder unit 2 decodes the additional sound information and sends the sound generation data to the sound generation unit 6, and the sound generation unit 6 outputs the sound signal based on the sound generation data. Output c.

Next, a character broadcast signal based on the coded transmission system will be described. A hierarchical diagram of the coded transmission method teletext signal is shown in Figure 1.2-1 on page 15 of the document “Revised Text Broadcasting Technology Handbook” (published by Broadcasting Technology Development Association, published June 6, 1988). Has been done.

According to the above-mentioned document, the layer 1 shows the specifications of the character signal as the electro-physical signal in the physical layer. If the period per bit of the character signal is T _C , then T _C = 1 / 364f _H (seconds) (f _H is the frequency of the horizontal synchronizing signal). Layer 2 is a link layer, and character signals are handled as logical data of 1 and 0. The data line is a transmission unit of a character signal transmitted during one horizontal scanning line period of a television video signal, and is composed of a synchronizing part and a data packet. The data packet is a part of the data line excluding the synchronization part, and includes a prefix, a data block and a check code. The synchronization section includes a clock run-in for bit synchronization of the character signal and a framing code for byte synchronization. The check code is an error correction code and is a shortened difference set cyclic code that can be decoded by a majority logic circuit in units of data packets (272,190). The layer 3 is a network layer and mainly shows a prefix function. The prefix is data for identification and control attached to the head of the data packet, and the data block is a part of the data packet excluding the prefix and the check code, and various information data is transmitted. The layer 4 is the transport layer and shows the function of the data group. The data group consists of a data group which is one group of information data transmitted by one or a plurality of data blocks. Layer 5 is a session layer showing the structure of program data, functions for controlling program identification, and the like. The layer 6 shows various functions of presentation encoding in the presentation layer, and defines encoding for displaying characters and figures and expressing additional sounds.

Next, regarding the structure of the program management data and the page data, as shown in page 16 (Fig. 1.2-2) of the above-mentioned document "Revised Character Broadcasting Technology Handbook", the program management data has a header. It sends program management data related to the entire program. The program management data or page data consists of a data header and some data units.

Next, as shown in FIG. 4, the structure of the data unit and the transmission procedure are composed of the data unit identification, the data unit data length, and the unit data. The data unit identification represents the function of identifying the type of data unit, and its coded representation consists of data unit parameters. The data unit link flag indicates whether the following data unit is a continuous data unit and is connected, and the data unit data length indicates the data length of the data unit data. The data unit data is the data of the number of data indicated by the data unit data length.

Next, the current allocation of data unit parameters is shown in FIG. 2. The blanks in the figure are unused.

As for the coding example of the current teletext, as shown in page 27 (FIG. 1.5-1) of the above-mentioned document "Revised Text Broadcasting Handbook", there are two data units and data unit parameters. Is "24H",
It is "20H", and the two data units shown in FIG. 2 are a data unit indicating a "header sentence" and a "text body", respectively.

[0012]

However, in the above-mentioned conventional configuration, when selecting a related teletext program or page, first, the index screen is designated and called out.
The program number and page number must be specified by looking at the table of contents screen, and the problem is that the character programs that are stored in the memory are limited to those that are random or have a program number or page number specified in advance. Was there.

The present invention solves the above-mentioned problems of the prior art. The magazine number, program number, page number, program type,
Provides a transmission method that defines tree information such as program instruction display position information, related program number, dependent magazine number, dependent program number, and dependent program page number on the sending side, and the receiving side uses the received tree information to send characters. It manages broadcast programs for each related program, preferentially stores the character programs or pages of the related programs in the memory, or searches for and displays the character programs or pages of the related program type without specifying the program number. An object of the present invention is to provide a transmission method and a receiving device to perform.

[0014]

In order to achieve the above object, a transmission system and a receiving device of the present invention are provided with a data unit of tree information of teletext by an encoding transmission system, and a magazine number of tree information, The program number, page number, program type, program instruction display position information, related program number, dependent magazine number, dependent program number, dependent program page number, etc. are transmitted as data unit data, and the tree information magazine number, program number, page Receiving means for receiving a character broadcast by an encoding transmission method in which a number, a program type, a program instruction display position information, a related program number, a dependent magazine number, a dependent program number, a dependent program page number and the like are given as data unit data, Tree information data unit that recognizes tree information from data unit parameters output from receiving means Program to detect and identify means, the program number and page number of the text-based program that has been displayed is selected and
Page number detecting means and program data extracting means for extracting program data matching the program number and page number of the character program detected by the program / page program detecting means from the data unit data detected by the tree information data unit recognizing means. And storage control means for controlling the buffer memory to preferentially store the character program having the program number and the page number designated by the subordinate program data of the program data extracted by the program data extraction means. Cursor display means for displaying a cursor on the displayed character screen based on the program instruction display information of the program data extracted by the program data extraction means,
Based on the order of the program instruction display information of the program data extracted by the program data extracting means, the cursor moving means for moving the cursor displayed by the cursor displaying means, and the program selected by the cursor moved by the cursor moving means The present invention has a configuration such as presentation requesting means for making a presentation request for a character program having a program number and a page number instructed by the subordinate program data of the program data extracted by the data extracting means.

[0015]

With the above arrangement, the present invention can present a teletext program having a different program number or page number related to the teletext program currently presented without inputting the program number or page number one by one. Become.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A transmission system and a receiver according to an embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the receiving apparatus according to the present embodiment is used as a receiving means 15 for receiving a character broadcast by a coded transmission method, and is superimposed on a vertical blanking period from an inputted television video signal a. A character signal extracting unit 1 for extracting a character signal, a decoder unit 2 for decoding a character signal extracted from the character signal extracting unit 1 and developing it into a character graphic for display, a character signal extracted by the character signal extracting unit 1 Buffer memory unit 3 and decoder unit 2 for storing only
In the display control unit 4 for displaying the display data expanded into the character graphic on the screen, the video memory unit 5 for storing the display data actually displayed on the screen by the display control unit 4, and the decoder unit 2 for decoding the display data. The configuration of the sound generation unit 6 that generates an actual sound based on the additional sound data is the same as that of the above-described conventional example, and the same reference numerals are given, and the description thereof is omitted.

The characteristic configuration of this embodiment is further added,
Tree information data unit recognition means 7 for recognizing that the data unit is tree information from the data unit parameter output from the teletext receiving device 15, and a program for detecting the program number and page number of the selected and displayed text program. Program data for extracting program data corresponding to the program number and page number of the character program detected by the program / page number detection means 8 from the data unit data detected by the page number detection means 8 and the tree information data unit recognition means 7. Accumulation control for controlling the buffer memory unit 3 in order to preferentially accumulate the character program having the program number and the page number designated by the subordinate program data of the program data extracted by the extraction unit 9 and the program data extraction unit 9. Means 10, program data is displayed on the selected and displayed text screen. Based on the program instruction display information of the program data extracted by the extraction means 9, the cursor display means 11 for displaying a cursor, the program data extracting means 9
Cursor moving means 12 for moving the cursor displayed by the cursor display means 11, and program data extraction selected by the cursor moved by the cursor moving means 12 based on the order of the program instruction display information of the program data extracted by This is to newly provide components such as a presentation requesting unit 13 for requesting presentation of a character program having a program number and a page number designated by the subordinate program data of the program data extracted by the unit 9.

With respect to the teletext receiving apparatus including the above components, the relationship and operation of each component will be described below with reference to FIG.

First, a description of the same teletext reception processing as in the conventional example will be omitted. Next, the tree information of the related teletext program is detected by the tree information data unit recognizing means 7 from the output of the character signal extracting unit 1. The tree information is recognized by allocating the data unit parameters shown in FIG. The data unit parameter indicating the tree information is 16
Decimal data 20, 24, 28, 2C, 30, 31, 3
2, 34, 35, 38, 39, 3B, 3C, 3D, 3
Any 1-byte data other than E and 3F may be used. The blanks in the figure are unused.

Next, an example of the structure of the tree information data group is shown in FIG. From the tree information data unit recognized by the tree information data unit recognizing means 7, the program / page number detecting means 8 detects the currently presented program number and page number from the decoder section 2. The program data extracting means 9 reads the program number and page number detected by the program / page number detecting means 8 from the upper 4 bits of PB5 of the data unit shown in FIG. 4 of the tree information data group, and the lower 4 of PB5. By reading the program number from the bit and PB6 and reading the page number from PB7, the tree information data group corresponding to the currently presented program number or page number is extracted. The program type is read from PB8 of the data unit of the extracted tree information data group, and PB9 is read from PB9.
The number of programs related to the program indicated by PB7 from 5 is read.
Information on the related program is read from PB10 onward.

The subordinate magazine number is read from the upper 4 bits of PB10 and the lower 4 bits of PB10 and PB1 are read.
The subordinate program number is read from 1, and the subordinate page number is read from PB12. PB13 to PB16 are the above PB1
0 to PB12 is information indicating the display position where the program numbers and contents of the dependent programs are displayed, from PB13 to the horizontal program instruction display start position, from PB14 to the vertical program instruction display start position, and from PB15 to the horizontal direction. The end position of the program instruction display of, and the end position of the program instruction display in the vertical direction are read from PB16. The same is read for PB17 and thereafter. The storage control unit 10 stores the subordinate magazine number, subordinate program number, and subordinate page number extracted by the program data extracting unit 9 preferentially to store the buffer memory unit 3.
To control. The cursor display means 11 displays the cursor based on the information indicating the display position extracted from the program data extracting means 9, and the cursor moving means 12 based on the information indicating the display position of the dependent program extracted from the program data extracting means 9. Then, the cursor is sequentially moved, and the presentation requesting unit 13 requests the display control unit 4 to present the dependent program number or page number indicated by the cursor.

As described above, according to the present embodiment, a data unit for tree information by character broadcasting of the coded transmission system is newly provided, and a magazine number, a program number, a page number, a program type, and a program instruction display of the tree information. By transmitting the position information, the number of related programs, the dependent magazine number, the dependent program number, the dependent program page number, etc. as data unit data, the receiving side uses the received tree information to perform teletext programs for each related program. Manage and store text programs or pages with related numbers preferentially in memory,
It is possible to search and present a character program or page of a related program type without designating a program number.

[0024]

As is apparent from the above embodiments, according to the present embodiment, the received tree information is utilized by transmitting the information of the related subordinate program as the tree information by the character broadcasting of the coded transmission system. The text broadcast programs are managed for each related program, and the text programs or pages of the related programs are preferentially stored in the memory, or the text programs or pages of the related program type are searched without specifying the program number. It is possible to realize an excellent transmission system and receiving device capable of making presentations and the like.

[Brief description of drawings]

FIG. 1 is a block diagram of a teletext receiver according to an embodiment of the present invention.

[Figure 2] Data unit parameter allocation diagram

FIG. 3 is a data group display pattern diagram of tree information of the same embodiment.

FIG. 4 is a block diagram of a data unit

FIG. 5 is a block diagram of a conventional teletext receiver.

[Explanation of symbols]

 7 Tree Information Data Unit Recognition Means 8 Program / Page Number Detection Means 9 Program Data Extraction Means 10 Storage Control Means 11 Cursor Display Means 12 Cursor Moving Means 13 Presentation Request Means

Claims (2)

[Claims] 1. A data unit of tree information provided in a character broadcast by an encoding transmission system, a magazine number, a program number, a page number, a program type, a program instruction display position information, a related program number, and a dependent magazine of the tree information. A transmission method in which a number, a dependent program number, and a dependent program page number are transmitted as data unit data. 2. A tree number magazine number, program number, page number, program type, program instruction display position information, number of related programs, subordinate magazine number, subordinate program number, subordinate program page number are added as data unit data. Receiving means for receiving a character broadcast by the encoding transmission method, tree information data unit recognizing means for recognizing tree information from the data unit parameters output from the receiving means, and program numbers of selected and displayed character programs and The program / page number detecting means for detecting the page number and the program number and page number of the character program detected by the program / page number detecting means from the data unit data detected by the tree information data unit recognizing means are matched. Program data extracting means for extracting program data, and the program data extracting means. Storage control means for controlling the buffer memory for preferentially storing the program having the program number and the page number designated by the subordinate program data of the program data extracted by the means, and the selected and displayed character Based on the program instruction display information of the program data extracted by the program data extracting means on the screen,
Cursor display means for displaying a cursor, and cursor movement means for moving the cursor displayed by the cursor display means based on the order of the program instruction display information of the program data extracted by the program data extraction means. Presentation requesting means for making a presentation request of a character program having a program number and a page number designated by subordinate program data of the program data extracted by the program data extracting means selected by the cursor moved by the cursor moving means. A receiving device provided.