JPH0638183A - Teletext receiver - Google Patents

Abstract

PURPOSE:To select desired information only and to receive it quickly by utilizing a program number and a program revision flag sent in a teletext signal. CONSTITUTION:The receiver is made up of a teletext reception section 2 demodulating teletext data from a television broadcast signal, a control section 3 controlling write and read of the teletext data to/from a storage section 5, a display control section 9 converting picture data outputted from the control section 3 into a display signal, an audio data synthesis section 10 converting audio data into an analog signal, a program number identification section 8 storing a designated program number, and a revision flag discrimination section 7 storing the revision flag, the control section 3 references data stored in the program number identification section 8 and the revision flag discrimination section 7 to retrieve data in the storage section 5, informs it that the program is revised in an audio signal or a picture signal or in the both when a revision flag of the designated program is revised, transfers the designated program data to be read to a memory card 6 connecting to the control section 3 to revise the data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a teletext receiver.

[0002]

2. Description of the Related Art In teletext, information for one page of all programs is transmitted in about 20 seconds, and information for the next page of all programs is transmitted for about 20 seconds in succession. In the conventional teletext receiving device that is broadcasting, the teletext programs that are sent out are sequentially stored in the memory built into the teletext receiving device, and the specified program is read and displayed. Was there.

[0003]

The teletext program, except for the subtitle program, is designed to send out the same contents for a certain period of time. Therefore, the teletext program received at all times has the same contents as the previous contents. I couldn't choose to receive only the information I wanted, just like the one I wanted. It is an object of the present invention to utilize a program number and a program update flag transmitted in a teletext signal so that only desired information can be selected and quickly received.

[0004]

FIG. 1 is a block diagram of an electric circuit of a main part of a teletext receiving apparatus showing an embodiment of the present invention. As shown in FIG. Of the character broadcasting data and the storage unit 5 for storing the image and audio data of the character broadcasting demodulated by the character broadcasting receiving unit 2; Control unit 3 for controlling writing and reading
A display control section 9 for converting the image data output by the control section 3 into a television screen display signal; a voice synthesis section 10 for converting the voice data output by the control section 3 into an analog voice signal; An input section 4 for inputting an operation signal to the section 3,
Program number identification unit 8 for storing a specified teletext program number
And an update flag discriminating section 7 for storing an update flag of a designated teletext program. When the input section 4 is operated to specify a program number and an update reservation signal is input to the control section 3, the same control is performed. The section 3 refers to the data stored in the program number identification section 8 and the update flag determination section 7, searches the data stored in the storage section 5 to identify the designated teletext program, and updates the program update flag. Is updated, and when the update flag of the designated program is updated, the audio signal is input to the audio synthesis unit 10 by outputting the audio signal or the image signal or both from the control unit 3. The image signal is input to the display control unit 9 to notify that the program has been updated based on the input. If the memory expansion card 6 is connected to the control unit 3 and the program update flag is updated, the specified teletext program data stored in the storage unit 5 by the control unit 3 is read out and the memory expansion card is read. 6, the data of the memory expansion card 6 is updated and stored, or the updated teletext programs can be sequentially stored in the memory expansion card 6.

[0005]

According to the present invention, with the above-mentioned configuration, the teletext is received, and when the desired teletext program is updated, the update is notified, so that only the desired information is selected. It becomes possible to receive,
The designated broadcast program stored in the memory expansion card 6 can be read out and displayed by the control unit 3, and the desired program can be promptly requested without receiving the desired program over several tens of seconds as in the conventional case. You will be able to watch the programs you do

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram of an electric circuit of a main part of a teletext receiver, showing an embodiment of the present invention. Reference numeral 2 denotes a teletext receiver, which separates the teletext signal from the television broadcast signal input through the input terminal 1 to demodulate and output the teletext data. Reference numeral 3 denotes a control unit that sequentially writes and stores the teletext image and audio data demodulated by the teletext receiving unit 2 in the storage unit 5. Reference numeral 4 denotes an input unit. When the input unit 4 is operated to specify a program number of a teletext to be received, the specified program number is input to the program number identifying unit 8 via the control unit 3 and stored. Then, the control unit 3 refers to the data stored in the program number identification unit 8, searches the data stored in the storage unit 5 to identify the specified teletext program number, and the control unit 3 performs the teletext broadcasting. The program number data is read from the storage unit 5 and output. Reference numeral 9 denotes a display control unit, 10 denotes a voice synthesizing unit, and the character broadcasting voice data read from the storage unit 5 by the control unit 3 is input to the voice synthesizing unit 10 and converted into an analog voice signal by the voice synthesizing unit 10. The data is converted and output, and the output is input to an audio circuit of a television to reproduce an audio signal. Similarly, the image data of the teletext read from the storage unit 5 by the control unit 3 is input to the display control unit 9. The display control unit 9 converts the signal into a TV screen display signal and outputs the signal, and inputs the output to the video circuit of the TV to reproduce the image signal.

FIG. 2 is a block diagram of a header portion of teletext program data. The header portion of the program data uses an 8-bit signal so that the program number and the program update flag can be identified. ing. Operate the input unit 4 to control the unit 3
When a program number is designated and the update reservation signal is input, the designated program number is input and stored in the program number identification unit 8 via the control unit 3, and similarly, the update flag determination is performed via the control unit 3. The update reservation signal is input to and stored in the section 7, and the control section 3
Refers to the data stored in the program number identification section 8, searches the data stored in the storage section 5 by the control section 3 to identify the designated teletext program number, and the designated teletext program number is When the search is successful, the control unit 3 further confirms whether the update reservation signal is input to the update flag determination unit 7, searches the data stored in the storage unit 5 to determine the current update flag, and updates the update flag. The flag determination unit 7 stores it. With reference to the data stored in the program number identification unit 8 and the update flag determination unit 7, the control unit 3 searches for the text broadcast data sequentially written in the storage unit 5, and the program update flag of the designated text broadcast program is set. For example, when the data is updated by being inverted from 0 to 1 or from 1 to 0, the control unit 3 outputs an update notification signal.

When the announcement of the updated program is given by voice, the update announcement signal output from the controller 3 is input to the speech synthesizer 10 and converted into the announcement sound by the speech synthesizer 10.
When the program is reproduced as an audio signal in the same manner as the teletext signal and the notification of the updated program is given by an image, the update notification signal output from the control unit 3 is input to the display control unit 9 and the display control unit It is converted into a display signal at 9 and reproduced as an image signal like the teletext signal. Alternatively, the update may be notified by both of the above methods. Further, instead of outputting the update notification signal from the control unit 3, the data of the updated teletext program is read and output, input to the voice synthesis unit 10 and the display control unit 9, and received by the television based on the input. The broadcast that is being performed may be switched so that the updated teletext program is displayed.

Reference numeral 6 denotes a memory expansion card, which is a control unit 3
Storage unit 5 that is connected to and is built in the teletext receiver.
Of the specified teletext program stored in the storage unit 5 is confirmed by the control unit 3 and the program update flag is updated. If the program update flag is updated, the storage unit The specified teletext program data stored in 5 is read out and transferred to the memory expansion card 6, and the data in the memory expansion card 6 can be updated and stored. Alternatively, the storage capacity of the memory expansion card 6 is increased, and the designated updated teletext program data stored in the storage unit 5 by the control unit 3 is read out and transferred to the memory expansion card 6 for memory expansion. The updated teletext programs may be stored in the card 6 in order.

FIG. 3 is a flowchart showing the program update procedure of the control unit 3. First, the teletext signal demodulated by the teletext receiving unit 2 is fetched, and the image and audio data of the teletext is sequentially written and stored in the storage unit 5 (step 1). The program number and the update reservation signal input from the input unit 4 are fetched, the program number is transferred to and stored in the program number identification unit 8, and the update reservation signal is transferred to and stored in the update flag determination unit 7. The control unit 3 refers to the data stored in the program number identification unit 8, searches the data stored in the storage unit 5, confirms the designated program number, and updates the flag determination unit 7
It is confirmed whether or not the update reservation signal is input to, and the current flag of the designated program is detected and transferred to and stored in the update flag determination unit 7. The control unit 3 refers to the data stored in the program number identification unit 8 and the update flag determination unit 7, and refers to the storage unit 5
The stored data is searched to determine whether the program update flag of the designated program has been inverted. If the program update flag has not been inverted, the process returns to step 1 and the teletext image and audio data are sequentially stored in the storage unit 5. Write and store in. When the program update flag is reversed, the designated program data stored in the storage unit 5 is read and transferred to the memory expansion card 6,
The data of the memory expansion card 6 is updated and stored.
Alternatively, the designated program data are sequentially stored in the memory expansion card 6 and are sequentially stored. Next, the notification signal is output and input to the voice synthesis unit 10, the display control unit 9, or both, and the process is ended. Therefore, when the desired program is updated, only the updated program can be selected and displayed on the screen, and the desired program can be viewed quickly.

[0011]

As described above, according to the present invention,
Only the latest desired information can be selected and received promptly, and each time the desired program is updated, it can be stored in the memory expansion card in order and the history can be stored. It is possible to improve the performance of the broadcast receiving device and expand the functions.

[Brief description of drawings]

FIG. 1 is a block diagram of an electric circuit of a main part of a teletext receiver, showing an embodiment of the present invention.

FIG. 2 is a configuration diagram of a header portion of teletext program data.

FIG. 3 is a flowchart showing a program update procedure.

[Explanation of symbols]

 1 input terminal 2 teletext receiver 3 control unit 4 input unit 5 storage unit 6 memory expansion card 7 update flag determination unit 8 program number identification unit 9 display control unit 10 voice synthesis unit

Claims (3)

[Claims] 1. A teletext receiving unit for separating a teletext signal from a television broadcast signal and demodulating and outputting the teletext data, and a memory for storing the teletext image and audio data demodulated by the teletext receiving unit. Unit, a control unit that controls writing and reading to and from the storage unit, a display control unit that converts image data output by the control unit into a television screen display signal, and audio data output by the control unit in an analog format. A voice synthesizing unit for converting into a voice signal, an input unit for inputting an operation signal to the control unit, a program number identifying unit for storing a designated teletext program number, and an update for storing an update flag of a designated telecast program. When the update reservation signal is input to the control unit by operating the input unit by designating the program number, the control unit controls the program number identification unit and the update flag determination unit to store the data. Data to retrieve the data stored in the storage unit to identify the designated teletext program,
It is determined whether the program update flag is updated, and when the update flag of the designated program is updated, the audio signal is output from the control unit as an image signal, or both, so that the audio signal becomes the synthesized sound unit. And a video signal is input to the display control unit to notify that the program has been updated based on the input. 2. When a memory expansion card is connected to the control unit and the update flag of the designated program is updated, the designated teletext program data stored in the storage unit is read by the control unit. The teletext receiving apparatus according to claim 1, wherein the teletext receiver is transferred to the memory expansion card, and data of the memory expansion card is updated and stored. 3. When a memory expansion card is connected to the control unit and the update flag of the designated program is updated, the designated teletext program data stored in the storage unit is read by the control unit. The teletext receiving apparatus according to claim 1, wherein the teletext receiving program is transferred to the memory expansion card and the updated teletext program is stored in order in the memory expansion card.