JPH09163320A - Teletext broadcasting recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a teletext broadcasting recording device with which any arbitrary character program can be immediately recorded and reproduced by recording character data detected by a character signal separator circuit and selecting the arbitrary character program through a character program control circuit. SOLUTION: A teletext adapter 20 receives the broadcasting transmitting the character program through a tuner circuit 1 and the character data, which are superimposed during a vertical flyback erasure period, are separated from the video signals detected by a video intermediate frequency amplifier circuit 2 and a video detection circuit 3 through a character signal separator circuit 6. At a character program control circuit 12 for selecting the character data signals of arbitrary character program, the character data of arbitrary character program are recorded in a character data recording circuit 8 and by directly decoding these character data, the arbitrary character program can be immediately recorded and reproduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a character program recording apparatus for character multiplex broadcasting in television broadcasting.

[0002]

2. Description of the Related Art Conventionally, as a character multiplex broadcasting recording apparatus, a method of recording an output video signal from a normal character multiplex broadcasting adapter on a video tape recorder is known. Here, a conventional recording method will be briefly described.

FIG. 3 shows a block diagram of a conventional character multiplex broadcast recording apparatus. In FIG. 3, reference numeral 20 is a character multiplex adapter, 21 is a video tape recorder, and the character multiplex adapter is a tuner 1, a video intermediate frequency amplifier circuit 2,
Video detection circuit 3, audio detection circuit 4, video amplification circuit 5, character data separation circuit 6, CPU circuit 9, video mixing circuit 1
0, audio mixing circuit 11.

The video tape recorder comprises 22 video signal recording / reproducing circuits and 23 audio signal recording / reproducing circuits.

In the character data separation circuit, the received video signal separates the character data superimposed in the vertical blanking period from the video signal. Then, the character data is decoded in the CPU circuit to generate a character signal and an additional sound, and the video signal mixing circuit and the audio signal mixing circuit further cause a normal TV broadcast video signal and audio signal, a character multiplex video signal and Switch to audio signal,
It is recorded on a video tape recorder and played back.

[0006]

However, in the above configuration, in order to reproduce an arbitrary program of the character program which is once converted into a video signal and recorded, fast forward and reverse are performed to find the character program to be viewed. There was nothing else.

Therefore, in order to reproduce an arbitrary character program,
There were problems such as having to fast-forward or reverse the video tape recorder.

[0008]

In order to solve the above-mentioned problems, the character multiplex broadcast recording apparatus of the present invention records an arbitrary character program as character data and replaces it with a character data portion of a composite signal again during reproduction. It is designed to be reproduced.

According to the present invention, it is possible to immediately reproduce any text program.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION According to the first aspect of the present invention, a character program control circuit for selecting a character data signal of an arbitrary character program records only character data of a desired character broadcast in advance. This is a possible character multiplex broadcast recording device, and has an effect of recording only character data of a preselected character broadcast.

A second aspect of the present invention is a tuner circuit for extracting a desired signal from a television signal,
The video intermediate frequency amplification circuit that amplifies the intermediate frequency signal, the video detection circuit that detects the video intermediate frequency, the audio detection circuit that detects the audio intermediate frequency, and the character data superimposed during the vertical blanking period of the video signal. A character data detection circuit that separates from the video signal, a character signal recording circuit that records the detected character data, a character signal reproduction circuit that reproduces the recorded character data, and a video amplification circuit that amplifies the detected video signal. In a character multiplex broadcast recording device configured by a video mixing circuit for switching a video signal for television broadcasting and a video signal for teletext, and an audio mixing circuit for switching an audio signal for television broadcasting and an audio signal for teletext, A character multiplex broadcasting system that has a character program control circuit that selects the character data signal of any character program and can record only any character data. Obtained by the device, to record any character program character data, by decoding the character data directly, such an action can play text-based program immediately.

Next, the invention according to claim 3 of the present invention is a tuner circuit for extracting a desired signal from a television signal, a video intermediate frequency amplifier circuit for amplifying an intermediate frequency signal, and a video intermediate frequency detection. Video detection circuit, an audio detection circuit for detecting an audio intermediate frequency, a character data detection circuit for separating character data superimposed in the vertical blanking period of the video signal from the video signal, and recording the detected character data. A character signal recording circuit, a character signal reproducing circuit for reproducing recorded character data, a video amplifying circuit for amplifying a detected video signal, and a video mixture for switching between a television broadcast video signal and a text broadcast video signal In the character multiplex broadcast recording device including a circuit and an audio mixing circuit for switching between a television broadcast audio signal and a teletext audio signal, an arbitrary character number is used. It has a character program control circuit that selects the character data signal and a character data switching circuit that inserts arbitrary character data into the video signal, selects an arbitrary character program from the recorded character program data, and decodes it into character information. This is a character multiplex broadcast recording device capable of performing, and has an effect that an arbitrary character program can be recorded as character data and the character program can be immediately reproduced.

A character multiplex broadcast recording apparatus according to an embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

(Embodiment 1) FIG. 1 shows the first aspect of the present invention.
3 is a block diagram showing the character multiplex broadcast recording apparatus according to the present invention.

In FIG. 1, reference numeral 20 is a character multiplex adapter, 1 is a tuner, 2 is a video intermediate frequency amplifier circuit,
3 is a video detection circuit, 4 is an audio detection circuit, 5 is a video amplification circuit, 6 is a character signal separation circuit, 8 is a character data recording circuit,
Reference numeral 9 is a CPU circuit, 10 is a video mixing circuit, 11 is an audio mixing circuit, and 12 is a character program control circuit.

The tuner circuit receives the broadcast in which the desired character program is transmitted, and from the video signals detected by the video intermediate frequency amplification circuit and the video detection circuit, the character data detection circuit performs the vertical blanking period. By separating the character data superimposed on the video signal from the video signal and selecting the character data signal of the arbitrary character program, the character program control circuit records the arbitrary character program as character data and directly decodes this character data. , You can instantly play the text program.

According to such a configuration, the character data separation circuit records the detected character signal data, and the character program control circuit selects an arbitrary program to obtain immediate recording and reproduction of the arbitrary character program. be able to.

(Embodiment 2) FIG. 2 shows claim 1 of the present invention.
And the block block diagram of the character multiplex broadcast recording device according to claim 3 is shown.

In FIG. 2, reference numeral 20 is a character multiplex adapter, 1 is a tuner, 2 is a video intermediate frequency amplifier circuit,
3 is a video detection circuit, 4 is an audio detection circuit, 5 is a video amplification circuit, 6 is a character signal separation circuit, 7 is a character data switching circuit,
Reference numeral 8 is a character data recording circuit, 9 is a CPU circuit, 10 is a video mixing circuit, 11 is an audio mixing circuit, and 12 is a character program control circuit.

The tuner circuit receives a broadcast in which a desired character program is transmitted, and the character data detection circuit selects a vertical blanking period from the video signals detected by the video intermediate frequency amplification circuit and the video detection circuit. The character data superimposed on is separated from the video signal and recorded. Then, by selecting a character data signal of an arbitrary character program from the character data recorded by the character program control circuit and directly decoding this character data, the character program can be immediately reproduced.

According to such a configuration, the character data separation circuit records the detected character signal data, and the character program control circuit selects an arbitrary program to obtain immediate recording and reproduction of the arbitrary character program. In addition to this, it is possible to record and reproduce the character program information in real time.

[0022]

As described above, according to the present invention,
The detected character data can be recorded by the character signal separation circuit, and an arbitrary program can be selected by the character program control circuit to immediately record or reproduce the arbitrary character program.

Further, it is possible to record and reproduce the text program information in real time.

[Brief description of the drawings]

FIG. 1 is a block diagram of a text multiplex broadcast recording apparatus according to Embodiment 1 of the present invention.

FIG. 2 is a block diagram of a text multiplex broadcast recording apparatus according to Embodiment 2 of the present invention.

FIG. 3 is a block configuration diagram of a conventional character multiplex broadcast recording apparatus.

[Explanation of symbols]

 1 Tuner circuit 2 Video intermediate frequency amplification circuit 3 Video detection circuit 4 Audio detection circuit 5 Video amplification circuit 6 Character signal separation circuit 7 Character data switching circuit 8 Character data recording circuit 9 CPU circuit 10 Video mixing circuit 11 Audio mixing circuit 12 Character program Control circuit 20 Character multiplex decoder 21 Video tape recorder 22 Video signal recording / reproducing circuit 23 Audio signal recording / reproducing circuit

Claims (3)

[Claims] 1. A character multiplex broadcast recording apparatus capable of recording only character data of a desired character broadcast in advance by a character program control circuit for selecting a character data signal of an arbitrary character program. 2. A tuner circuit for extracting a desired signal from a television signal, a video intermediate frequency amplification circuit for amplifying an intermediate frequency signal, a video detection circuit for detecting the video intermediate frequency, and a sound for detecting the audio intermediate frequency. A detection circuit, a character data detection circuit that separates the character data superimposed during the vertical blanking period of the video signal from the video signal, a character signal recording circuit that records the detected character data, and reproduces the recorded character data. A character signal reproduction circuit, a video amplification circuit for amplifying the detected video signal, a video mixing circuit for switching between a television broadcast video signal and a text broadcast video signal, a television broadcast audio signal and a text broadcast A character program control for selecting a character data signal of an arbitrary character program in a character multiplex broadcasting recording device composed of an audio mixing circuit for switching an audio signal. A character multiplex broadcast recording device that has a circuit and can record only arbitrary character data. 3. A tuner circuit for extracting a desired signal from a television signal, a video intermediate frequency amplification circuit for amplifying an intermediate frequency signal, a video detection circuit for detecting a video intermediate frequency, and a sound for detecting an audio intermediate frequency. A detection circuit, a character data detection circuit that separates the character data superimposed during the vertical blanking period of the video signal from the video signal, a character signal recording circuit that records the detected character data, and reproduces the recorded character data. A character signal reproduction circuit, a video amplification circuit for amplifying the detected video signal, a video mixing circuit for switching between a television broadcast video signal and a text broadcast video signal, a television broadcast audio signal and a text broadcast A character program control for selecting a character data signal of an arbitrary character program in a character multiplex broadcasting recording device composed of an audio mixing circuit for switching an audio signal. A character multiplex broadcast recording apparatus having a circuit and a character data switching circuit for inserting arbitrary character data into a video signal, capable of selecting an arbitrary character program from recorded character program data and decoding it into character information. .