JPH05219483A - Transmission system and teletext receiver adapted to same - Google Patents

Abstract

(57) [Summary] [Purpose] A transmission method that can automatically switch channels without the need for human intervention, and characters adapted to it, even for programs that are continuously broadcast over multiple channels. A broadcast receiving device is provided. [Structure] The transmitting side transmits program follow-up information on a program which continues to be broadcast over a plurality of channels using a character broadcasting of an encoding transmission system, and the receiving side receives the receiving means 10
A teletext is received by 0 and the teletext signal 1a is extracted. Then, the program following information recognizing means 7 recognizes and extracts the program following information 7a based on the teletext signal 1a, and the program following information processing means 8 extracts the program following information 8a.
The channel switching time is set on the basis of the channel information and the channel information 8a regarding the broadcast station code of the program continuation destination is extracted, and the channel switching means 20 outputs the channel switching request signal 10a based on the channel information 8a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention enables a broadcasting side to continue broadcasting over a plurality of channels by using a character broadcasting of a coded transmission system on a transmitting side without affecting a current teletext receiving device. The present invention relates to a transmission method for automatically following various programs and a teletext receiver adapted to the transmission method.

[0002]

2. Description of the Related Art In recent years, a coded transmission type character broadcasting system has been put into practical use, which uses television broadcasting waves to provide various information consisting of characters, figures and melodies so that the information can be displayed on a home television receiver. Has been converted. Also,
A television receiver having a teletext receiving device for receiving the teletext of this coded transmission system has been put into practical use.

Generally, a teletext signal used for teletext is 14H during a vertical blanking period of a television signal,
It is superimposed on 15H, 16H and 21H. Then, this teletext signal is divided into the following six layers. The hierarchy is a physical layer and indicates a transmission line. The teletext signal is composed of 364 clocks (bits) during one horizontal scanning line period, and 294 clocks are effective in this 364 clocks.

Next, the hierarchy is a link layer and shows data lines. In this link layer, the teletext signal is configured as logical data of "1" or "0". The data line consists of 296 bits,
It is divided into a 24-bit synchronization section (clock run-in and framing code) and a 272-bit data packet section. Then, further, the synchronization unit displays “10101
It is composed of a clock run-in for synchronizing with a 16-bit structure of 010101010 "and a framing code of 8-bit structure of" 11100101 "indicating that it is a character broadcast.
It consists of a 90-bit data part and an 82-bit check code. This check code is for error correction.

Next, the layer is a network layer composed of a data portion in the layer, which is composed of a 6-bit prefix and a 22-byte data block. In this network layer, the prefix is mainly used for recognition and control. The next layer is the transport layer, which is composed of data blocks and is composed of one or a plurality of data groups.

[0006] Next, the layer is a session layer, which shows the structure of program data and the function for controlling program identification. Finally, the layer is a presentation layer, which shows various functions of presentation encoding, and defines encoding for displaying characters and figures and additional sounds.
Hereinafter, a teletext receiving apparatus capable of receiving a teletext of a conventional coded transmission system will be described with reference to the drawings.

FIG. 4 is a block diagram showing the configuration of a conventional teletext receiving apparatus. In FIG. 4, a is a video signal of a television, 1 is a sampling section for sampling the teletext signal 1a superimposed on the vertical blanking period from the video signal a, and 2 is a decoding of the teletext signal 1a extracted from the sampling section 1. A decoder unit 3 for performing presentation processing, a buffer memory 3 for accumulating the teletext signal 1a extracted from the extraction unit 1,
Reference numeral 4 denotes a display control unit that expands the contents processed by the decoder unit 2 and outputs a display signal b. Reference numeral 5 denotes a video memory for storing the display data 4a output from the display control unit 4. Reference numeral 6 denotes a decoder unit. Sound generation data 2a output from 2
Is a sound generation unit that outputs a sound signal c based on

The operation of the conventional teletext receiver thus configured will be described. The extracting unit 1 extracts the teletext signal 1a superimposed on 14H, 15H, 16H and 21H in the vertical blanking period of the input video signal a. The decoder unit 2 stores the extracted teletext signal 1a in the buffer memory 3 as data 2b, and
The program data of the program number that needs to be presented is extracted from the data 2b stored in the buffer memory 3 and decoded,
The display data 4a composed of character / graphic information is written in the video memory 5 via the display control unit 4. The display control unit 4 sequentially reads the display data 4a written in the video memory 5 and outputs the display signal b. Furthermore, the decoder unit 2
If the program to be presented has additional sound data, it decodes the additional sound data and sends the sound generation data 2a to the sound generating unit 6. Thereby, the sound generation unit 6 generates the sound signal c based on the sound generation data 2a.

[0009]

However, it cannot be said that the teletext receiving apparatus capable of receiving the teletext of the conventional coded transmission system as described above does not fully utilize the digital transmission function of the teletext. For example, a broadcast program may be broadcast over a plurality of channels due to restrictions on program organization. Specifically, if the broadcast time has expired in a relay of professional baseball etc.
When relayed to a broadcasting station, NH is a high school baseball relay.
There are cases such as relay relay from the K general station to the education station and relay relay from the satellite first channel to the satellite second channel in satellite broadcasting.

In such a case, the conventional television receiver or television receiver with a built-in teletext receiver has a problem that the channel must be artificially switched in accordance with the broadcast time of the program. Further, conventionally, there is an image recording apparatus having a function (commonly called one-touch recording) capable of setting a recording operation of a program from an arbitrary time to an arbitrary time when a channel is selected. When the program is relayed as described above, it cannot be dealt with, and there is a problem that the recording of the program is interrupted.

In view of the above problems, an object of the present invention is to provide a transmission that can automatically switch channels even if it is a program continuously broadcast over a plurality of channels without artificially performing it. A method and a teletext receiver adapted to the method.

[0012]

According to a first aspect of the present invention, a transmission method includes a program including program follow-up information regarding a program which is continuously broadcast on a plurality of channels by using a character transmission of the coded transmission method on the transmission side. Information is transmitted, and the receiving side follows the channel of the receiver based on the program tracking information extracted by receiving the teletext.

According to another aspect of the present invention, there is provided a teletext receiving apparatus which receives a teletext of a coded transmission system provided with program follow-up information regarding a program which is continuously broadcast over a plurality of channels, and the receiving means. A program follow-up information recognizing means for recognizing and extracting the program follow-up information based on the teletext signal output from the program, and setting a time for switching the channel based on the program follow-up information and a broadcasting station to which the program continues. The program tracking information processing means for extracting channel information about the code, and the channel switching means for switching the channel based on the channel information are provided.

A teletext receiver according to a third aspect is the teletext receiver according to the second aspect, wherein the channel is a channel of a television receiver. The teletext receiving device according to a fourth aspect is the teletext receiving device according to the second aspect, wherein the channel is a channel of the image recording device.

[0015]

According to the structure of the present invention, the transmitting side transmits the program follow-up information on the program which continues to be broadcast over a plurality of channels by using the character broadcasting of the coded transmission system, and the receiving side receives the receiving means. By receiving the teletext, the teletext signal is extracted. Then, the program following information recognizing means recognizes and extracts the program following information based on the teletext signal, and the program following information processing means sets the time for switching the channel based on the program following information and continues the program. The channel information relating to the broadcasting station code is extracted, and the channel switching means switches the channel based on the channel information. As a result, in the television receiver, the channel is switched following the broadcast of the program, and it becomes unnecessary to artificially switch the channel. Further, in the image recording device, the channel can be switched following the broadcast of the program, and the program can be recorded without interruption.

[0016]

1 is a block diagram showing the configuration of a teletext receiver according to an embodiment of the present invention. In FIG. 1, the parts having the same reference numerals as those in the conventional example of FIG. 4 have the same functions. As shown in FIG. 1, the teletext receiving device is
The reception means 100, the program follow-up information recognition means 7, the program follow-up information processing means 8 and the channel switching means 20 are provided.

The receiving means 100 comprises a sampling section 1, a decoder section 2, a buffer memory 3, a display control section 4, and a video memory 5.
And the sound generation unit 6, and receives the character broadcast of the coded transmission system in which the program follow-up information regarding the program continuously broadcast over a plurality of channels as data unit data is added, and receives from the video signal a to the character broadcast signal 1a. To output the display signal b and the sound signal c.

The program follow-up information means 7 recognizes and extracts the program follow-up information 7a based on the teletext signal 1a output from the receiving means 100. The program follow-up information processing means 8 sets the time for switching the channel based on the program follow-up information 7a and extracts the channel information 8a regarding the broadcast station code of the continuation destination of the program.

The channel switching means 20 comprises a switching channel discrimination means 9 and a channel switching request means 10.
The switching channel discriminating means 9 discriminates the channel to be switched based on the channel information 8a, and the channel switching requesting means 10 requests the tuner switching section (not shown) for channel switching.

Reference numeral 11 is a television receiver, and 12 is an image recording device, which is connected to the channel switching means 20 of the teletext receiving device. In the teletext receiving apparatus configured in this manner, the transmission side transmits the specific program information including the program follow information regarding the program which is continuously broadcast over a plurality of channels by using the teletext of the encoding transmission system. It is adapted to the method.

The teletext receiving apparatus configured as described above will be described. The reception processing of the teletext is the same as the conventional one, and the extracting unit 1 changes the video signal a to the teletext signal 1a.
And the telecast signal 1a is stored in the buffer memory 3 as the data 2b by the decoder unit 2.
The program data of the program number that needs to be presented is extracted from the data 2b stored in the buffer memory 3 and decoded,
The display data 4a composed of character / graphic information is written in the video memory 5 via the display control unit 4. The display control unit 4 sequentially reads the display data 4a written in the video memory 5 and outputs the display signal b. In addition, the decoder unit 2
If the program to be presented has additional sound data, this additional sound data is decoded and the sound generation data 2a is sent to the sound generation unit 6. Thereby, the sound generation unit 6 generates the sound signal c based on the sound generation data 2a.

In this way, the receiving means 100 extracts the display signal b and the sound signal c from the teletext signal 1a. Further, program follow-up information 7a is added to the teletext signal 1a as data unit data. The program follow-up information recognition means 7 recognizes and extracts the program follow-up information 7a.
By The recognition of the program following information 7a is performed by using the hexadecimal notation data "20", "24", "28", which has already been used from the data unit parameter as shown in FIG.
"2C", "30", "31", "32", "34",
"35", "38", "39", "3B", "3C",
This is performed by arbitrarily selecting 1-byte data excluding "3D", "3E" and "3F". Then, the program follow-up information 7a having a data structure as shown in FIG. 3 is extracted. In FIG. 3, a indicates a data group header, b indicates a data header, and c indicates a data unit.

In this way, the program follow-up information recognizing means 7 recognizes and extracts the data unit data to be the program follow-up information 7a based on the teletext signal 1a. Then, the program follow-up information processing means 8 sets the time for switching the channel based on the program change time information indicated by the data unit data which is the program follow-up information 7a, and when the program continuation occurs, it is the program follow-up information 7a. The channel information 8a is output to the channel switching means 20 based on the program continuation destination broadcasting station code information indicated by the data unit data.

Then, in the channel switching means 20,
Channel information 8a by the switching channel discrimination means 9
The channel switching request means 10 generates a set value of the determined switching channel, and the channel switching request signal 10a is sent to the tuner switching section of the television receiver 11 or the image recording device 12. Output. As a result, in the television receiver 11, the channel is switched following the broadcast of the program, and it becomes unnecessary to artificially switch the channel. Further, in the image recording device 12, the channel can be switched following the broadcast of the program, and the program can be recorded without interruption.

As described above, the transmission side transmits the program follow-up information regarding the program which is continuously broadcast over a plurality of channels by using the character transmission of the coded transmission method, and the reception side transmits the program following information by the receiving means 100. To extract the teletext signal 1a. Then, the program follow information recognizing means 7
According to the teletext signal 1a, the program follow-up information 7a
Is recognized and extracted, the program follow-up information processing means 8 sets the time for switching the channel based on the program follow-up information 8a, and the channel information 8a concerning the broadcast station code of the continuation destination of the program is extracted, and the channel change-over means 20 Thus, the channel switching request signal 10a is output based on the channel information 8a. As a result, the television receiver 11 switches the channel following the broadcast of the program, and it is not necessary to artificially switch the channel. Further, in the image recording device 12, the channel can be switched following the broadcast of the program, and the program can be recorded without interruption. Further, since the program follow-up information is added by using the character broadcasting of the coded transmission system, it does not affect the existing character broadcasting receiving apparatus.

The recording operation of the image recording apparatus 12 is a recording operation of setting the recording start time and the recording end time when setting the recording channel even in the recording operation of setting the recording end time with the recording start time when the recording channel is selected. But good.

[0027]

According to the transmission system of the present invention and the teletext receiving apparatus adapted to the transmission system, the transmission side follows a program relating to a program which is continuously broadcast over a plurality of channels by using the teletext of the encoding transmission system. The information is transmitted, and the receiving side receives the teletext by the receiving means and extracts the teletext signal. Then, the program tracking information recognition means recognizes and extracts the program tracking information based on the teletext signal,
The program follow information processing means sets the time for switching the channel based on the program follow information, extracts the channel information about the broadcast station code of the continuation destination of the program, and the channel switching means switches the channel based on the channel information. As a result, in the television receiver, the channel is switched following the broadcast of the program, and it is not necessary to artificially switch the channel. Further, in the image recording device, the channel can be switched following the broadcast of the program, and the program can be recorded without interruption. Further, since the program follow-up information is added by using the character broadcasting of the coded transmission system, it does not affect the existing character broadcasting receiving device.

[Brief description of drawings]

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

FIG. 2 is a diagram showing data unit parameters of program following information 7a.

FIG. 3 is a data structure diagram of program following information 7a.

FIG. 4 is a block diagram showing a configuration of a conventional teletext receiving device.

[Explanation of symbols]

 1a Character broadcast signal 7a Program follow information 8a Channel information 7 Program follow information recognition means 8 Program follow information processing means 11 Television receiver 12 Image recording device 20 Channel switching means 100 Receiving means

Claims (4)

[Claims] 1. A transmission side transmits program information including program follow-up information relating to a program that continues to be broadcast over a plurality of channels using a character broadcasting of a coded transmission system, and a receiving side receives the character broadcasting. A transmission system in which the channel of the receiver is made to follow based on the program follow-up information extracted by. 2. A receiving means for receiving a character broadcast of a coded transmission system, which is provided with program follow-up information relating to a program to be continuously broadcast over a plurality of channels, and a teletext signal output from the receiving means. Program follow-up information recognition means for recognizing and extracting the program follow-up information, and a program for setting channel switching time based on the program follow-up information and extracting channel information regarding a broadcast station code of the continuation destination of the program A teletext receiving device comprising: follow-up information processing means; and channel switching means for switching the channel based on the channel information. 3. The teletext receiving device according to claim 2, wherein the channel is a channel of a television receiver. 4. The teletext receiving device according to claim 2, wherein the channel is a channel of an image recording device.