JPH04213985A - Transmission system and receiver - Google Patents

Abstract

PURPOSE:To offer a receiver applying time setting and time correction such as year, month, day, time, minute, second or the like automatically by utilizing time information such as year information, month information, day information, hour information, minute information, second information or the like sent through the use of a teletext broadcast of the coding transmission system. CONSTITUTION:The above system is provided with a time information recognition means 7 recognizing a data unit to be time information, a time information processing means 8 processing time information such as year information, month information, day information, hour information, minute information, second information or the like from the data unit data detected by the time information recognition means 7 and a time information setting means 9 setting automatically the time information such as year information, month information, day information, hour information, minute information, second information or the like obtained by the time information processing means 8.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention uses teletext using a coded transmission method on the transmitting side to transmit year information, month information, day information, hour information, minute information, second information, etc. without affecting the current teletext receiver. Transmission method and reception method for transmitting time information such as information, and automatically setting and correcting time such as year, month, day, hour, minute, second, etc. on the receiving side using the received time information It is related to the device.

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 decoder 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.; 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 1.0. 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. A check code is an error correction code that can be combined using a majority logic circuit in units of data packets (
272, 190) is a shortened difference set cyclic code. Tier 3
mainly indicates the prefix function 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 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 above-mentioned configuration of the transmission system and receiving device, it is difficult to display the text program broadcast in the teletext broadcast or to receive the information of the teletext broadcast simply by generating sound with additional sound. The problem was that it could not be used in a receiving device.

[0013] In view of the above problems, the present invention has devised a transmission method that specifies time information such as year information, month information, day information, hour information, minute information, second information, etc. in transmission, and recognizes and processes the time information. The present invention provides a receiving device that automatically sets and corrects time such as year, month, day, hour, minute, and second on the receiving side using the received time information.

[0014]

[Means for Solving the Problems] In order to solve the above problems, the transmission method and receiving device of the present invention set limits on time information and recognize that the received data unit is time information from the received data unit parameter. Year information, month information, day information, hour information, minute information,
Time information processing means for processing time information such as second information, year information, month information, day information obtained by the time information processing means,
The apparatus is equipped with a time information setting means that automatically sets time information such as hour information, minute information, and second information.

[0015]

[Operation] With the above-described configuration, the present invention automatically detects time information data from teletext program data, and
This allows automatic time settings and time corrections such as month, day, hour, minute, second, etc.

[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. 6 is a sound generating section that generates actual sound based on the additional sound data decoded by the decoder section 2; 7 is a sound generating section that generates actual sound based on the additional sound data decoded by the decoder section 2; and 7, the data unit is time information based on the data unit parameter output from the receiving means. time information recognition means 8 for processing time information such as year information, month information, day information, hour information, minute information, second information, etc. from the data unit data detected by the time information recognition means 7; Processing means; 9, time information setting means for automatically setting time information such as year information, month information, day information, hour information, minute information, second information, etc. obtained by the time information processing means 8; 10, the time information setting means; This is an image recording device section that performs a recording operation based on time information such as year information, month information, day information, hour information, minute information, and second information set by the time information setting means 9.

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/graphic 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 sound generation data to the sound generation section 6, and the sound generation section 6 generates sound generation data based on the sound generation data. Outputs a sound signal.

The time information is detected by the time information recognition means 7. Recognition of time information is performed using data unit parameters shown in FIG. Data unit parameters indicating time information are hexadecimal data 20, 24, 28, 2C, 30, 3
1, 32, 34, 35, 38, 39, 3B, 3C, 3D
, 3E, and 3F may be any byte data. FIG. 2 shows an example of a data group structure of time information. From the time information data unit recognized and extracted by the time information recognition means 7, the time information processing means 8 reads the year from PB5 and PB6 of the data unit of the time information data group, the month from PB7, and the day from PB8. Read the time from PB9, read the minutes from PB10, and read the day of the week from PB11. The time information read by the time information processing means 8 is set in the image recording device section 10 by the time information setting means 9.

As described above, according to this embodiment, data unit parameters for time information based on teletext broadcasting using the encoded transmission system are newly provided, and the year information, month information,
By transmitting date information, hour information, minute information, second information, etc. as data unit data, it is possible to automatically set and correct time such as year, month, day, hour, minute, second, etc. It can be used for recording reservation operations, etc., and teletext information can be utilized in a receiving device.

[0022]

[Effects of the Invention] As described above, according to this embodiment, year information, month information, day information,
Automatically detects time information such as hour information, minute information, second information, etc., and enables automatic setting and automatic correction of time information such as year, month, day, hour, minute, second, etc. Teletext information can be utilized by the receiving device.

[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 a data group structure of time 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 generation section 7 Time information recognition means 8 Time information processing means 9 Time information setting means 10 Image recording device a Video Signal b Display signal c Sound signal

Claims (3)

[Claims] [Claim 1] The transmitting side transmits time information such as year information, month information, day information, hour information, minute information, and second information using teletext using a coded transmission method, and the receiving side transmits the received time information. In a system that uses information to automatically set and correct time such as year, month, day, hour, minute, second, etc., a data unit for time information based on teletext using the encoded transmission method is newly provided, A transmission method characterized in that year information, month information, day information, hour information, minute information, second information, etc. of the time information is transmitted as data unit data. [Claim 2] Time information, year information, month information, day information,
A receiving means for receiving teletext using a coded transmission method in which hour information, minute information, second information, etc. are added as data unit data, and a data unit parameter output from the receiving means that the data unit is time information. and time information processing means for processing time information such as year information, month information, day information, hour information, minute information, second information, etc. from the data unit data detected by the time information recognition means. , time information setting means for automatically setting time information such as year information, month information, day information, hour information, minute information, and second information obtained by the time information processing means. Receiving device. [Claim 3] Time for automatically setting recording reservation information set for recording reservation in image recording and time information such as year information, month information, day information, hour information, minute information, and second information according to claim 2. When the start time matches the time information such as year information, month information, day information, hour information, minute information, and second information set by the information setting means, the recording operation starts, and when the end time matches, the recording operation starts. An image recording device characterized in that: