KR19990016723A - Determining the type of aspect ratio and how to play it when playing a wide vision program - Google Patents

Abstract

According to the present invention, when performing the recording function of a broadcast program, it is determined whether the screen type of the broadcast program of the currently received channel is a wide vision, and then storing CTL pulses having different logic states in the control track of the video tape according to the determination result. The present invention relates to a playback method in a VCR to which a broadcast program aspect ratio classification method is applied. In particular, the present invention relates to a first process of detecting a logic value of a CRL pulse of a control track of a video tape to be played back, and to a logic value detected through the first process. And a third process of determining whether the aspect ratio of the reproduced image is wide vision, and correcting the aspect ratio by controlling an aspect ratio matching means when it is determined that white vision is being reproduced in the second process. Determining the Aspect Ratio Type and Playing Method of External Vision Broadcasting Program Will.

Description

Determining the type of aspect ratio and how to play it when playing a wide vision program

The present invention relates to a TVCR that integrates a television receiver (hereinafter referred to as a TV) and a video cassette recorder (hereinafter referred to as a VCR). Particularly, when receiving and recording heterogeneous broadcast programs, the recorded video shows that the currently recorded broadcast program is a wide vision. The present invention relates to an aspect ratio judgment and reproducing apparatus for recording a wide vision broadcast program that detects and recognizes a CTL pulse during playback and automatically switches to a wide vision state when the tape is recorded using a CTL pulse.

In general, an image recording / reproducing apparatus (hereinafter referred to as a VCR) is a device for recording a video signal and an audio signal on a magnetizable video tape and reproducing it when necessary to view it through a display means such as a CRT or a TV. The phosphorus configuration is as shown in FIG.

The conventional VCR shown in FIG. 1 includes a microcomputer 600 which generally controls the operation of the VCR by manipulation of the keypad 900C or the remote controller 900B, and stores data to be processed by the microcomputer 600. The tuner 100 receives a broadcast signal of a channel selected by the tuner voltage output from the microcomputer 600, the tuner 100 from the antenna ANT, and the broadcast signal received from the tuner 100. IF detector 200 for detecting a frequency, and a video tape (cassette) that is operated in accordance with the operation control signal output from the microcomputer 600, the video detector (cassette) seated in the video technology through the head (H) A recording unit 300 for recording a signal output from the 200 and an operation control signal output from the microcomputer 600 (generally recoil with respect to the recording unit 300), and the video mounted on the video tech Tape (cassette) OSD for outputting a corresponding character image to receive the output information through the playback unit 400 to access the recorded signal through the head (H) and output the character information output from the microcomputer 600 It is largely composed of a generator 700, a signal processor 800 for processing the signal output from the playback unit 400 and the jitter output from the OSD generator 700 to pass to the TV or CRT side. .

That is, the VCR configured as described above, when the viewer operates the key input unit 220 and selects a broadcasting channel of the TV to be watched in the state where power is applied, the microcomputer 200 recognizes the selected channel voltage corresponding thereto. It generates and applies to the tuner 100. Accordingly, the tuner 100 receives the broadcast signal of the broadcast channel selected by the tuning voltage generated by the microcomputer 200 from the free space through the antenna ANT to the image processor 300 and the audio processor (not shown). Input the broadcast signal.

Thus, the image processor 300 inputs the processed image signal to the image amplifier 320 by processing only the image signal from the broadcast signal input from the tuner 100 by the control signal of the microcomputer 200. That is, the image amplification unit 320 amplifies the video signal to a level that can be displayed on the screen of the CRT 400 and supplies the image signal to the CRT 400 so that the video signal transmitted from the broadcasting station to the free space is displayed on the screen. Make sure you can watch the signal.

In this case, the vertical / horizontal synchronization processor 340 deflects the image signal displayed on the screen of the CRT 400 in the vertical direction and the horizontal direction based on the vertical synchronization signal and the horizontal synchronization signal processed by the image processor 300. In addition, when the viewer operates the key input unit 220 to select the VCR mode to watch the VCR with the TVCR, the viewer receives the deck from the recording medium through the deck 600 by a control signal processed by the system controller 500 associated with the microcomputer 200. The video signal reproduced by reproducing the video / audio signal is processed by the video processor 300.

Accordingly, the image processor 300 processes the image signal reproduced and input from the deck 600 by the control signal of the microcomputer 200, amplifies the image signal to a predetermined level through the image amplifier 320, and displays the image on the CRT 400 screen. The reproduced video signal is displayed.

Since the TVCR operating as described above simply records the broadcast program received through the corresponding channel on the date selected by the user, the heterogeneous aspect ratio, that is, in the case of the wide vision, is recorded as it is not recognized correctly, so There is a problem that the user must match the new aspect ratio because the aspect ratio is not correct.

An object of the present invention for solving the above problems is that when receiving and recording heterogeneous broadcast programs, CTL pulses are played back when the recorded video program is recorded using CTL pulses on the recorded video tape. The present invention provides a method of judging and reproducing an aspect ratio type during recording of a wide vision broadcast program which detects and recognizes a signal and automatically switches to a wide vision state.

1 is a block diagram schematically showing the configuration of a typical TVCR

2 is a simplified configuration example of a TVCR to which the screen type recording method is applied when a broadcast program is recorded according to the present invention;

3 is an exemplary diagram of a CTL pulse for recording information on a control track;

4 is an operation flowchart of reproduction according to the aspect ratio type according to the present invention;

* Explanation of symbols for the main parts of the drawings

10: tuner 20: micom

30: IF detector 40: Chroma

70A: CTL detector 80A: image demodulator

90: sound processing unit 600: deck unit

SP: Speaker ANT: Antenna

In order to achieve the above object, a feature of the present invention is to determine whether the screen type of a broadcast program of a currently received channel is a wide vision in performing a recording function of a broadcast program, and then determine CTL pulses having different logic states according to the determination result. A playback method in a VCR applying a broadcast program aspect ratio classification method stored in a control track of a video tape, comprising: a first step of detecting a logic value of a CRL pulse of a control track of a video tape to be played; A second step of determining whether the aspect ratio of the image to be reproduced based on the detected logic value is a wide vision, and a third step of controlling the aspect ratio matching means to correct the aspect ratio if it is determined that the white vision is being reproduced in the second step; To include the process.

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

First, in the present invention, it is assumed that the WSS detection means determines whether wide vision is applied, and stores a specific logic value using a CTL pulse in the control track of the video tape.

FIG. 2 is a diagram illustrating a simplified TV configuration to which a time recording method is applied when recording a broadcast program according to the present invention. The microcomputer 20 generally controls the operation of the TV system and the preset voltage output from the microcomputer 20. A tuner 10 for receiving the broadcast signal of the channel selected by the antenna ANT, and an IF detector for detecting an intermediate frequency from the broadcast signal received by the tuner 10 and outputting a composite video signal CVBS ( 30) and a chroma IC 40 for receiving the composite video signal output from the IF detector 30 to process the video and audio signals separately and outputting the separated video and audio signals, and a video tape on which the video tape is seated. A deck unit 600 for reproducing, a CTL detector 70A for recognizing a CTL pulse stored in a control track among signals reproduced by the deck unit 600, and detecting a logic value thereof, and the deck unit 600 Of signals played on The microcomputer receives a video demodulator 80A for demodulating and outputting a video signal stored in a video track, a video signal output from the chroma IC 40 and a video signal output from the video demodulator 80A. According to the control of (20), it is comprised by the switching part SU which outputs only one.

The preferred operation of the TV according to the present invention configured as described above will be described in detail with reference to the accompanying drawings.

In general, the control track stores various control information in the form of CTL pulses, where the shape of the CTL pulses is the same as shown in FIG. To distinguish between rows. 3 illustrates a case in which logic high and low are classified according to whether the ratio of the duration of the low state to the duration of the high state is 1: 2 or 2: 1. .

4 is a flowchart illustrating an operation during broadcast recording and playback of a time correction channel according to the present invention.

In step S101, the microcomputer 20 determines whether to perform a control operation according to recording and playback. When it is determined that recording and playback should be performed, the microcomputer 20 proceeds to step S102. In step S102, the microcomputer 20 includes a deck unit 600. Control to perform normal playback operation.

Subsequently, in step S103, it is determined whether the CTL pulse detected by the CTL detection unit 70A is a logic zero (assuming that the CTL pulse has a state of 0 in the case of wide vision), and the microcomputer 20 performs the CTL detection unit 70A. If it is determined that the output signal is not a wide vision, the process proceeds to step S104 so that the aspect ratio can be maintained at 4: 3 by not operating the aspect ratio matching device.

On the other hand, when the microcomputer 20 determines that the signal output through the CTL detection unit 70A is a wide vision, the microcomputer 20 proceeds to step S103 to operate the aspect ratio matching device to switch the aspect ratio to 16: 9.

When the aspect ratio type determination and playback apparatus is provided when recording an external vision broadcast program according to the present invention operating as described above, it is possible to automatically match the aspect ratio of the playback screen without the user having to perform aspect ratio matching.

Claims (1)

In performing the recording function of the broadcast program, it is determined whether the screen type of the broadcast program of the currently received channel is wide vision, and according to the determination result, the broadcast program aspect ratio storing CTL pulses of different logic states in the control track of the videotape. In the VCR playback method using the classification method, Detecting a logical value of a CRL pulse of a control track of a video tape to be played; A second step of determining whether an aspect ratio of an image reproduced based on the logic value detected through the first step is a wide vision; And And determining a ratio of aspect ratios during playback of the external vision broadcast program, wherein the aspect ratio is corrected by controlling the aspect ratio matching means if it is determined that the white vision is being reproduced in the second process.