JPS62108684A - Television set with character broadcasting receiving function - Google Patents

Abstract

PURPOSE:To attain the efficient utilization of a television with a character broadcasting receiving function by recording automatically, when a reserved broadcasting program is received, a data obtained from the character broadcasting signal of the broadcasting program on a tape recorder. CONSTITUTION:First of all, a television signal obtained from a reception part 2 is supplied to a waveform data fetching circuit 12, and at the circuit, it is sliced to an appropriate level, and a waveform-arranged character broadcasting signal is fetched. A fetched character broadcasting signal, after it is converted to a parallel signal at a serial/parallel conversion and error correction circuit 16 and is error-corrected, is stored at a buffer 17 temporarily. At such a time, when the broadcasting program to be received in absence is reserved from a remote controller or a keyboard 33, the data obtained from the character broadcasting signal coincided with a reserved magazine number or program number is recorded automatically on a cassette tape recorder 38 based on the reserved magazine number or program number.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to the technology of a teletext receiver, and more specifically, it is configured to be able to automatically receive a desired broadcast program by a program reservation mechanism, and is capable of automatically receiving a teletext receiver. The teletext signal is extracted from the multiplexed television signal on which the signal is superimposed and sequentially stored in a data memory, and the data stored in the data memory is read out and converted to display output for display on a CRT.
by giving the contents of the teletext signal to the CR
The present invention relates to a television set with a teletext receiving function configured to be able to display a teletext broadcast on a TV set.

(Prior art) Such a seven-segment television with teletext receiving function is
Using the vertical blanking period of the television video signal,
- Receive an encoded teletext signal transmitted in data packets whose unit length is a horizontal scanning period,
It is configured so that text and simple graphic information included in the teletext signal can be reproduced and displayed on the CR'T,
Currently, development research and test broadcasts are being conducted in various countries.

(Objective of the Invention) The present invention provides a television set with a teletext reception function that is functionally more superior.
The purpose is to try to make effective use of it.

(Structure of the Invention) In order to achieve the above object, the present invention has the following structure.

That is, the television set with a teletext receiving function according to the present invention has the basic configuration as described at the beginning, and has a television set for connecting a cassette tape recorder capable of arbitrarily recording and reproducing the contents of teletext signals. A cassette tape recorder interface is provided, and when a broadcast program reserved by the program reservation mechanism is received, data obtained from a teletext signal included in the broadcast program is transmitted to the cassette tape recorder interface. It has the feature that it is configured to be automatically recorded on a cassette tape recorder.

(Example) Hereinafter, the present invention will be described in detail based on an example shown in the drawings.

The drawing is a block diagram showing the circuit configuration of a television set with a teletext reception function according to an embodiment of the present invention. A receiving section 2 of a normal television set that performs RF amplification, IF amplification, and detection, and a video signal processing section 3 of a normal television set that extracts and processes a video signal from the composite video signal output from the receiving section 2. and the same (the audio signal processing section 4 of a normal television set that extracts and processes the audio signal from the composite video signal, the teletext signal processing section 5, which will be described in detail later, and the video signal processing section 3). a video switching circuit 6 for switching between the television video signal obtained by the teletext signal processing unit 5 and the teletext signal obtained by the teletext signal processing section 5; and a CRT (cathode ray tube) 7.
, a drive circuit 8 for driving the CRT 7, an audio switching circuit 9 for switching between the audio signal obtained by the audio signal processing unit 4 and the audio signal obtained by the teletext signal processing unit 5, and an audio layer width circuit. 10, a speaker 11, and a cassette tape recorder 38 which is capable of arbitrarily recording and reproducing the contents of the teletext signal obtained by the teletext signal processing section 5, which is built into the television set. ing.

The teletext signal processing unit 5 includes a waveform equalization data extracting circuit 12 into which the output of the receiving unit 2 is introduced, a clock pulse generation circuit 13, a synchronization signal generation circuit 14, and a framing detection identification circuit 15. Direct conversion/error correction circuit 16, 1-containment buffer 17, display clock generation circuit 18, main CPU 19, and its main CPU
Program ROM20 for PU19 and main C
A work RAM 2 for the PU 19 ] and a data memory 2 that stores required data of the extracted teletext signal.
2, and a timing control circuit 2 for the Fuji data memory 22.
3, a sub CPU 24, a program ROM 25 for the sub CPU 24, a work RAM' 26 for the sub CPU 24, a display controller 27, a display memory 28, a matrix circuit 29, an audio decoder 30, and a kanji ROM 31. , interface circuit 32
, a remote control receiver/keyboard 33 including a program reservation mechanism, a printer 34, the interface circuit 32, and the power tape recorder 38.
It consists of a cassette tape recorder interface 37 for exchanging signals with the cassette tape recorder.

That is, the television set with the teletext reception function configured as described above is configured so that the program reservation mechanism of the remote control receiver/keyboard 33 can automatically receive the broadcast program that the user wants to receive, and the teletext signal can be received automatically. By extracting the number of characters and transmission code from the superimposed multiplexed television signal and sequentially storing them in the data memory 22, reading out the data stored in the data memory 22, converting it into a display output, and giving it to C and RT7, The content of the teletext signal can be displayed on the CRT 7, and when a broadcast program reserved by the program reservation mechanism is received, the data obtained from the teletext signal of the broadcast program is displayed on the cassette tape recorder. The data is automatically recorded on the cassette tape recorder 38 via the interface 37.

A more detailed explanation of the operation of the teletext signal processing section 5 is as follows.

First, the television signal obtained from the receiving section 2 is
The signal is supplied to a waveform equalization data extraction circuit 12, which slices it into an appropriate level and shapes the waveform, and extracts the teletext signal.

The extracted teletext signal is converted from a serial signal to a parallel signal in a direct conversion/error correction circuit 16, and after errors are corrected, it is temporarily stored in an extension buffer 17. At this time, it is necessary to synchronize the teletext signal with the direct conversion in the direct conversion/error correction circuit 16, so the clock pulse generation circuit 13 and the framing detection and identification circuit 15 synchronize in bits and bytes. Be taken.

The teletext signal stored in the capture buffer 17 is judged by the main CPU 19 for framing detection errors, error correction errors, etc., and the presence or absence of data identification codes and reservations, and only the necessary data is transferred and stored in the data memory 22. be done.

On the other hand, in the sub CPU U 2.4, the main Cr',
The data (character code) taken in by U19 is decoded, and drawing processing and audio reproduction processing are performed.

Regarding the drawing process, the sub CPU 24 calculates the address in the kanji ROM 31 from the character code stored in the data memory 22, sequentially transfers each character pattern and its display address to the display controller 27,
Accordingly, the display controller 27 stores the character pattern in the display memory 28. At this time, in order to synchronize with the television image, synchronization is achieved by the display clock generation circuit 18 and the synchronization signal generation circuit 14, and the signal is outputted to the video switching circuit 6 via the matrix circuit 29. As a result, the required character pattern is displayed on the CRT 7.

Regarding audio reproduction processing, audio data is output to the audio decoder 30, converted into audio (melody sound) by the audio decoder 30, and output to the audio switching circuit 9. This reproduced sound is output to the speaker 11 through the amplifier 10.

Incidentally, access switching between the main CPU 19 and the sub CPU 24 to the data memory 22 is performed by a timing switching circuit 23.

Then, using a remote control transmitting section (not shown) for remotely controlling the teletext signal processing section 5 or the remote control receiving section/keyboard 33 with the program reservation mechanism, the broadcast program that you wish to receive while you are away or absent is pre-programmed. If the program has been reserved, based on the magazine number or program number for which the program has been reserved, if there is a number in the incoming teletext signal that matches the program reserved number, the cassette tape recorder interface 37 The data obtained from the teletext signal is automatically recorded on the cassette tape recorder 38 via the cassette tape recorder 38. In addition, the force cent tape recorder 38
After desired teletext signal data is recorded on the CRT 7, in order to reproduce the recorded data, operate the remote control receiving section/keyboard 33.
It is sufficient to display the teletext signal data on the
It is also possible to set the recorded cassette tape in another dedicated teletext reproduction machine for reproduction and display.

In order to exchange signals between the cassette tape recorder interface 37 and the cassette tape recorder 38, necessary signals are sent through a control signal line 35 and a data line 36 connected between the two 37.3's.

Furthermore, as a data transfer method between the cassette tape recorder interface 37 and the cassette tape recorder 38, "1" of the teletext signal (digital signal) is used.
” and “O” signals, F'SK (Frequen
cy5hift Keying) is modulated into each characteristic frequency signal by U'1.

Since this FSK method is a known method, a detailed explanation thereof will be omitted.

By the way, in the television set □ with teletext reception function according to the above embodiment, the cassette tape recorder 38 built into the television set is fixedly connected to the cassette tape recorder interface 37. A cassette tape recorder separate from the television set may be detachably attached to the cassette tape recorder interface 37 as desired.

(Effects of the Invention) As is clear from the above detailed description, according to the television set 7 with teletext receiving function according to the present invention,
Since it is equipped with a cassette tape recorder interface for connecting a cassette tape recorder that can record and play back the contents of teletext signals, it is possible to freely record teletext signals with the cassette tape recorder, and also to play back the teletext signals. Not only can you use the cassette tape to play back and watch a program whenever you like, but when you receive a broadcast program reserved by the program reservation mechanism, the data obtained from the teletext signal of the broadcast program is transferred to the cassette tape. Since it is configured so that it is automatically recorded on the cassette tape recorder via the recorder interface, even if you are away or absent, you can watch the teletext broadcast you want as long as you reserve the program in advance. It is extremely convenient and highly functional, and therefore the teletext service can be used very effectively, which is an excellent effect.

[Brief explanation of drawings]

The concave side is a block circuit configuration diagram showing an embodiment of a television set with teletext receiving function according to the present invention. 7...CRT. 22...Data memory, 33...Remote control receiver/keyboard with program reservation mechanism, 37...Interface for cassette tape recorder, 38...Cassette tape recorder.

Claims (2)

[Claims] (1) The program reservation mechanism is configured to automatically receive the desired broadcast program, and the teletext signal is extracted from the multiplexed television signal on which the teletext signal is superimposed and sequentially stored in the data memory. A television set with a teletext receiving function configured to display the contents of the teletext signal on the CRT by reading the data stored in the data memory, converting it into a display output, and providing it to the CRT, A cassette tape recorder interface is provided for connecting a cassette tape recorder capable of arbitrarily recording/reproducing the contents of the teletext signal, and when a broadcast program reserved by the program reservation mechanism is received, the broadcast 1. A television set with a teletext receiving function, characterized in that data obtained from a teletext signal in a program is automatically recorded on the cassette tape recorder via the cassette tape recorder interface. (2) Claim No. 1, wherein a cassette tape recorder built into the television set is fixedly connected to the cassette tape recorder interface.
A television set with a teletext reception function as described in .