KR20000040900A - Method for simultaneously recording two channels of video tape recorder - Google Patents

Abstract

PURPOSE: A method is provided to record and enlarge a broadcasting program by using a television recorder having a PIP(picture-in-picture) function to watch a main screen and a sub screen by simultaneously receiving two broadcast channels. CONSTITUTION: Broadcasting signals of two channels are received and stored after converting to digital data. A compression is performed with a method to obtain an average value based on a peripheral image by receiving stored two broadcasting programs. The broadcasting program of the first channel is stored in a upper part based on memory areas(100a,100b) of the whole image and the broadcasting program of the second channel is stored in the lower part. Two compressed and composed broadcasting programs are recorded by a common recording function of VCR. The recorded broadcasting programs are played back with a common playback method. A played signal is stored by converting to a digital. The image of one stored part is outputted by enlarging according to a user's request with dividing the upper and the lower parts.

Description

2-channel simultaneous recording method of video tape recorder

The present invention relates to a two-channel simultaneous recording method of a video tape recorder. In particular, when a user records two channels in the same time zone, the method stores an average value based on surrounding images after storing signals input from each tuner. The present invention relates to a two-channel simultaneous recording method of a video tape recorder in which a video delay is output in a manner opposite to that described above after the compression is performed to give a time delay method and to perform recording.

A conventional video tape recorder (VTR) that is generally used is intended to record only one channel of broadcast program on one tape.

That is, the conventional video tape recorder is largely composed of a recording unit 60 and a reproduction unit 70, as shown in Fig. 1A, and tuned by a tuner 61 of a program of a specific channel set by a user's selection. The signal tuned from the tuner 61 is demodulated by the demodulator 62 into the original signal, and then separated from the audio signal and the video signal by the audio recording circuit 64 and the video recording circuit 63, respectively. (65) and (66) are recorded on the tape (14), and during playback, video and audio data recorded on the tape (14) are read from the playhead (73) and then audio and video playback circuits ( 72 and 71 demodulate the original signal into the original signal.

At this time, the audio and video data recorded on the tape 14 are recorded on the audio track as shown in FIG. 1B, and the video signal is displayed on two frames of the first and first fields F1 ( To F2).

Such a conventional VTR is capable of recording only one broadcast channel during a viewing or reserved time period, which makes it impossible to record other broadcasts other than one broadcast channel so that important programs of other channels broadcasting at the same time cannot be viewed. Will be.

Recently, the VTR has been commercialized to record programs on channels other than the broadcasts being watched in the same time zone, but this also allows only one channel broadcast program to be recorded on one tape. There is a disadvantage that can not satisfy the desire of the user to watch the program of the channel.

An object of the present invention for solving the above problems is to store the signals input from each tuner when the user records two channels in the same time zone and then compress them in a manner for average value based on the surrounding images. The present invention provides a two-channel simultaneous recording method of a video tape recorder which gives a time delay method and outputs the recording order after the recording is performed in a manner opposite to that described above.

1A is a block diagram of a conventional video tape recorder

1B is a state diagram of recording of video and audio data of a conventional video tape;

2 is in accordance with the present invention

<Description of the symbols for the main parts of the drawings>

ANT: antenna 10a, 10b: tuner

20a, 20b: P / S separation unit 30a, 30b: image processing unit

40: CRT 50: Image Mixer

60a, 60b: voice processing unit 70a: speaker

70b: headphone 80: control unit

In order to achieve the above object, a feature of the present invention is to record and extend a broadcast program using a television receiver having a PIP function capable of simultaneously receiving two broadcast channels and viewing them on a main screen and a sub-screen. The first step of receiving signals, converting them into digital data, and storing them, and receiving two broadcast programs stored through the first step, compressing them in a manner for average value based on the surrounding images, respectively, Based on the memory area, the upper half of the first half stores the broadcast program of the first channel, and the lower half of the second stage stores the broadcast program of the second channel and synthesizes the second and second compression stages through the second step. The third step in which the broadcast program is recorded by the normal VCR recording function, and the recording in the third step A fourth step of reproducing the broadcast program by a normal reproduction method; a fifth step of digitally converting and storing the reproduced signal through the fourth step; and a video signal stored through the fifth step. And a sixth step of dividing the upper half and the lower half from the center based on the memory area of the image to expand and output an image of any one part according to a user's request.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is a schematic block diagram of an image processing portion for simultaneously storing two channel image data in a television having a PIP function to which the present invention is applied. Control unit 80 for controlling the overall process, the first tuner (10a) for receiving a broadcast signal of the main channel selected by the tuning voltage output from the control unit 80 from the antenna (ANT), and the control unit 80 Video signal (P) in the second tuner (10b) for receiving the broadcast signal of the sub-channel selected by the tuner voltage output from the antenna (ANT) and the signals output from the plurality of tuners (10a) (10b), respectively First and second P / S separation units 20a and 20b for separating the voice signal S and the first and second P / S separation units by operation control signals input from the control unit 80. To process the video signal output from 20a, 20b. First and second image processing units 30a and 30b, the first audio processing unit 60a for processing and outputting the audio signal S output from the first P / S separation unit 20a, and the second The second voice processing unit 60b for processing and outputting the voice signal S output from the P / S separation unit 20b, and the first and second voice processing units 60a by the control signal output from the control unit 80. , According to the user's selection by the switching unit 100 selectively providing the voice signals output from the speaker 70a or the headphone 70b, and an operation control signal output from the controller 80. It is formed of a main screen and a sub-screen, and then mixed and output through the CRT 40 is composed of an image mixing unit (50).

The above-described configuration is a configuration of a television receiver having a general PIP function, and further configuration according to the present invention is as follows.

A first memory 100a for receiving and storing the video signal output from the first P / S separation unit 20a and a video signal for receiving and storing the video signal output from the second P / S separation unit 20b. 2 memory 100b and image data stored in the first memory 100a and the second memory 100b, and are compressed by a method for an average value based on surrounding images, and then synthesized and outputted. Compression / synthesis unit 120 is composed.

Looking at the preferred operation of the television having a PIP function to which the present invention configured as described above is applied as follows.

When the user wants to simultaneously record two channels while receiving two channels through the first tuner 10a and the second tuner 10b for selecting the main screen and the sub-screen, the controller 80 controls the first channel. By operating the first tuner 10a and the second tuner 10b, the corresponding channel is tuned and received.

Accordingly, the broadcast program of the corresponding channel tuned through the first tuner 10a is divided into audio and video through the first P / S separation unit 20a, and simultaneously through the second tuner 10b. The broadcast program of the selected channel is divided into audio and video through the second P / S separator 20b.

Thereafter, the video signal output from the first P / S separation unit 20a is converted into a digital signal and stored in the first memory 100a and similarly output from the second P / S separation unit 20b. Is stored in the second memory 100b.

Image data stored in the first memory 100a and the second memory 100b are compressed and mixed in the compression / combining unit 120 as illustrated in FIG. 3. The compression / combining unit 120 receives image data stored in the first memory 100a and the second memory 100b, compresses the image data stored in the first memory 100a and the second memory 100b in a manner for an average value based on surrounding images, and then synthesizes them. Output to the VCR side.

Subsequently, the data decompression process converts the video signal output through the playback operation of the video tape from the VCR to digital using the A / D converter 130 as shown in FIG. Store in

The data stored in the memory 131 is normally used for one frame. At this time, the broadcast signals of the two channels stored in the memory 131 are decompressed through the data extension unit 133. At this time, the memory 131 ), Two channels are stored at the same time, so it is checked what broadcasts should be extended at the request of the user.

Accordingly, when the user intends to extend the first channel, only data of the first channel stored in at least half of the memory area as shown in FIG. 3 attached by the data retrieved by the data area search unit 132 may be recalled. The compressed state is released through the data stretcher 133, and the compressed state is transferred to the image mixer 50.

By providing a two-channel simultaneous recording method of a video tape recorder according to the present invention which operates as described above, the data of two channels is compressed without the need to change the configuration of the VCR unnecessarily. In the case of storing and reproducing, the data can be accessed and reproduced, but only one part selected by the user can be expanded so that one screen can be viewed.

While the invention has been shown and described with respect to particular embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the invention as set forth in the claims. Anyone can see it easily.

Claims (1)

In the method of recording and extending a broadcast program using a television receiver having a PIP function that can simultaneously receive two broadcast channels and watch them on a main screen and a sub-screen, Receiving a broadcast signal of two channels, converting the digital signal into digital data, and storing the digital signal; Receives two broadcast programs stored through the first step and compresses them in a method for average value based on surrounding images, respectively, and stores the broadcast program of the first channel in the upper half at the center based on the memory area of the entire image. A second step in which the lower half in the center is stored and synthesized with the broadcast program of the second channel; A third step of recording two broadcast programs compressed and synthesized through the second step by a normal VCR recording function; A fourth step of reproducing the broadcast program recorded through the third step by a normal reproduction method; A fifth step of digitally converting and reproducing the signal reproduced through the fourth step; And And a sixth step of dividing the video signal stored through the fifth step into an upper half and a lower half at the center of the memory area of the entire image, and extending and outputting an image of any one part according to a user's request. A two-channel simultaneous recording method of a video tape recorder characterized by the above-mentioned.