KR19980085816A - How to select and play the recording section of video tape - Google Patents

Abstract

According to the present invention, a control signal having a different duty ratio for each video program can be recorded on a video tape including a predetermined video program and additional video programs. A method of selecting and reproducing a recording section of a video tape, which enables selective reproduction by high-speed search to a desired video program by determining a duty ratio of the video tape.

Accordingly, the present invention provides a recording function of recording, on the recording surface of the video tape 14, a television broadcast signal tuned for a channel currently broadcasted from the tuning means 2, 4 according to the recording mode switching operation of the mode switch unit 6. And a video tape recorder having a playback function for reproducing a predetermined video program recorded video tape 14 according to a playback mode switching operation, wherein the video program and the additional video program are recorded for each tape section. In the case of reproducing the video tape 14 in which control signals having different duty ratios are recorded for each, the types of video programs recorded in the corresponding tape section are determined by detecting different duty ratios of the control signals. Depending on the operation, selective playback by fast search to a desired video program can be performed. It characterized by comprising step.

Description

How to select and play the recording section of video tape

The present invention relates to a method of selecting and reproducing a recording section of a video tape. More particularly, the present invention relates to a method of reproducing and recording a television broadcast signal and to recording or reproducing the video tape. The present invention relates to a method of selecting and reproducing a recording section of a video tape, in which a differential playback selection can be made according to a recording content by a control signal recorded differently according to the content of video information.

In general, in a video tape recording / reproducing apparatus such as a video cassette tape recorder for recording or reproducing a video signal and an audio signal on a video tape on which a magnetic side is formed by using magnetic properties, the video is recorded. Tape loading / unloading unit for mounting or ejecting the tape into the main body, and tape transfer mechanism for forward or backward transfer of the video tape seated by the tape loading / unloading unit at a constant or high speed. The magnetic flux is formed by the reproduction voltage generated according to the reproduction signal, and the image signal and the audio signal recorded on the video tape are read out, while the recording current is applied to the image surface and the audio signal to be recorded. A magnetic head for reproduction and recording which performs a recording operation by a leakage magnetic field generated between Playback signal processing unit for signal-processing video and audio signals read from the magnetic head, Recording signal processing unit for signal-processing video and audio signals to be recorded, Video signal and audio from the playback signal processing unit And a signal output unit for transmitting a signal to a video output device such as a television.

On the other hand, according to the video tape recording / reproducing apparatus equipped with such a component, the tape transfer mechanism is provided when a function button for reproducing the video tape is provided by a key operation of the matrix button unit provided in a predetermined portion of the remote control unit for remote control or the main body. The recording surface of the video tape is transported to reproduce the recorded video and audio signals by the magnetic head for reproduction, and then the signal processing operation is performed by the reproduction signal processing unit, and then on the screen of the television through the signal output unit. In addition to video output, audio output can be output through a speaker. When a function command for recording operation is provided, a video signal from a predetermined external video source and a television signal of a predetermined channel synchronized with a voice signal or a tuner are recorded. When the signal processing unit performs signal processing, the magnetic head for recording Video signals and audio signals to be recorded can be recorded on the recording surface of the video tape.

In addition, the video tape recording / reproducing apparatus has a capstan servo function for varying the video tape conveyed by the tape transfer mechanism according to the constant speed or variable speed function by driving the capstan motor, and a magnetic head for recording and reproduction. A drum servo function is provided for rotating a plurality of rotating drums at an accurate rotation speed. The capstan servo function controls the traveling speed and position of the tape running during the video tape playback function. While tracking control is performed to properly scan on video tracks, the drum servo function not only keeps the rotational speed of the rotating drum constant but also separates it from the video signal in order to suppress the time-axis fluctuation of the reproduced video signal. Rotation of the drum based on the phase of one sync signal This is done so properly.

At this time, the video tape recorder is used for recording the video information read from a separate information recording medium such as a video disk by a reproduction operation of an external video playback device such as a television broadcast signal or a video disk player selected from a tuner. The video tape is divided into a video track on which the video information is recorded, a voice track for recording audio signals, and a control track for recording control signals such as a vis signal capable of recognizing whether or not the video information is recorded. In a tape recorder, it is possible to determine whether or not to record video information according to whether a control signal recorded on a control track of a video tape is normally performed, and to perform a corresponding function control.

However, in such a video tape recorder, when predetermined video information such as movie information is stored and rented and played for a video tape rented for a fee, in addition to the video information such as a movie program corresponding to the present program of the video tape, the advertisement Since additional video information such as a program or a trailer program is included, in order to avoid playing the additional video information such as an advertisement program or a trailer program according to the taste of the viewer and to play the movie program which is the present program It is inconvenient that a separate function operation such as a fast forward function for the tape section of the tape is required.

Accordingly, the present invention has been made in view of the above circumstances, and a control signal (i.e., a bis signal) having a different duty ratio for each video program for a video tape containing a predetermined video program and additional video programs other than the above-described video program are included. By allowing the recording of the video tape, it is possible to provide a method of selecting and playing a recording section of a video tape, which enables selective playback by a high-speed search to a desired video program by determining the duty ratio of a control signal when the video tape is reproduced. There is a purpose.

According to the method of reproducing the recording section of the videotape according to the present invention for achieving the above object, the recording surface of the videotape is a television broadcast signal tuned to the channel currently broadcast from the tuning means in accordance with the recording mode switching operation of the mode switch unit. In a video tape recorder having a recording function for recording a video recorder and a playback function for playing back a video tape recorded with a predetermined video program in accordance with a playback mode switching operation, the video program and the additional video program are recorded for each tape section. In the case of reproducing a videotape in which control signals having different duty ratios are recorded for each video program together, by selecting different duty ratios of the control signals, the type of the video programs recorded in the corresponding tape section is judged and the viewer's selection operation. According to the desired video program It provides the write block selection reproducing method of the tape consisting of a phase that allows the selective reproduction by the high-speed search can be performed.

According to the present invention configured as described above, when a video tape recorder plays a videotape recorded with a movie program, an additional advertisement program, and a trailer program, the movie program, the additional advertisement program, and the trailer program are included in the video tape recorder. Accordingly, by detecting control signals recorded at different duty ratios, the viewer can perform a fast search to a desired movie program so that selective playback can be performed.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram showing the configuration of a video tape recorder to which a method for selecting and playing a recording section of a video tape according to the present invention;

2 is a diagram illustrating a state in which the duty ratio of the control signal is set differently for each recording section of the video tape according to a preferred embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

2: tuner, 4: video IF section,

6: mode switch unit, 8: recording signal processing unit,

10: signal amplification part, 12: signal recording part,

14: video tape, 16: drive servo circuit,

18: drive motor unit, 20: video output unit,

22: function setting section, 24: program memory,

26: timer, 28: control unit,

30: OSD signal processor, 32: signal decoder,

34: control signal generation unit, 36: control signal detection unit,

38: Control signal generator.

Hereinafter, the present invention configured as described above will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing the configuration of a video tape recorder to which the method for selecting and playing a recording section of a video tape according to the present invention is applied. In the apparatus of the present invention, reference numeral 2 denotes a predetermined configuration from the control unit 28 to be described later. 4 shows a tuner which receives the channel tuning data VT for channel tuning and tunes the corresponding channel and outputs the intermediate frequency signal mixed with the local oscillation signal generated by the channel tuning data VT. An image IF unit for intermediate frequency amplifying the tuned television broadcast signal.

Further, reference numeral 6 denotes that the television broadcast signal tuned from the tuner 2 can be recorded on the recording surface of the video tape 14 or read out from the video tape 14 by mode switching control of the controller 28 described later. And a mode switch unit which performs mode switching operation so that the displayed image information can reproduce an image.

Reference numeral 8 denotes a reproduction signal processing unit for reproducibly signal demodulating the image information signal reproduced from the video tape 14 in accordance with execution of the reproduction mode, and 10 denotes an image read out from the video tape 14. A signal amplifying part for amplifying the information signal up to a reproducible amplification level, and 12 is composed of a plurality of magnetic heads provided in the head drum (not shown) to read the video information recorded on the video track of the video tape 14; Signal reading part is shown.

Reference numeral 16 denotes a drive servo circuit section for servo controlling the reading operation of the signal reading unit 12 and the driving operation according to the reproducing mode of the video tape 14 under the driving control of the control unit 28 described later. For constant speed driving and high speed search of the head drum with the signal reading unit 12 and the tracking state of the recording surface of the video tape 14 by the servo control of the driving servo circuit unit 16 The drive motor portion for performing motor rotation for high speed driving is shown.

Further, reference numeral 20 denotes a video signal of a television broadcast tuned from the tuner 2 or video information reproduced from the video tape 14 or an OSD signal processing unit to be described later according to the mode switching state of the mode switch unit 6. A video output section for outputting the OSD display signal from 30 to the video output device side such as a television.

Also, reference numeral 22 is a matrix button unit provided in a remote control unit for remote control or a control panel predetermined portion of the main body, and key operation of a selection / playback command for selectively searching and playing a plurality of video programs recorded on the video tape 14 by high speed. The function setting unit in charge of the unit is shown.

Reference numeral 24 denotes a program memory in which a control program for controlling the selective playback operation by high-speed search is determined by determining the duty ratio of the control signal recorded on the control track of the video tape 14, and 26 is a crystal oscillator. It represents a timer that clocks the time through the clock pulse generated by the oscillation clock generating means as shown.

Further, reference numeral 28 denotes an optional playback function command for the present video program (e.g., movie program) and additional video program (e.g., advertising program and trailer program) recorded on the video tape 14 by the function setting unit 22. In the case where the key is input, the duty ratio of the control signal recorded for each video program of the video tape 14 detected by the control signal detection unit 36 described later is determined so that the driving motor unit 18 determines the video tape 14. If a control signal recorded for the selected video program is detected by performing a high-speed search for the recording section of the "

Also, reference numeral 30 is used to generate OSD display information for displaying the setting state of the selected reproduction for each video program of the video tape 14 which is keyed by the function setting unit 22 under the control of the control unit 28. An OSD signal processing unit is shown, and 32 denotes a signal decoder which decodes the OSD signal processed OSD display information data and outputs it as a display information signal that can be displayed on the screen.

Reference numeral 34 denotes a control signal generator for generating a control signal having a predetermined duty ratio in the recording mode under the control of the controller 28, and reference numeral 36 denotes a control signal read from the control track of the video tape 14; A control signal detection unit for detecting a duty ratio is shown. 38 denotes a control signal from the control signal generator 34 in a control track of the video tape 14, and is recorded on the video tape 14 as well. Indicates a control signal recording / reading unit that reads a control signal.

Here, the control signal from the video tape 14 detected by the control signal detection unit 36 includes the main video program of the video tape 14 as a movie program as shown in FIG. When an advertising program and a trailer program are additionally recorded as a program, a control signal having a duty ratio of, for example, 2: 8 is recorded in the control track for the recording section of the advertising program, and the recording section of the trailer program is recorded. A control signal having a duty ratio of, for example, 6: 4 is recorded in the control track.

Next, the operation of the present invention made as described above will be described in detail with reference to the accompanying drawings.

First, an additional video program such as an advertisement program and a trailer program is included in addition to the present video program such as a movie program, and the video tape 14 together with a control signal having a different duty ratio for each video program is recorded. ), When the function setting unit 22 inputs a function command to immediately play a movie program corresponding to the video program, the control unit 28 performs the control signal detection unit 36. It is determined whether or not the control signal recorded on the video tape 14 is detected.

At this time, the control signal detection unit 36 generates a detection signal that detects a duty ratio for the control signal from the video tape 14 read out through the control signal recording / reading unit 38. 28 is determined to be not a control signal having a duty ratio for this video program selected by the function setting section 22 based on the control program of the program memory 24, and controls the drive servo circuit section 16 to Servo control of the drive motor unit 18 enables high speed search of the tape section for the video tape 14.

In this state, the control unit 28 determines that the duty ratio of the control signal recorded in accordance with the present video program selected by the function setting unit 22 from the control signal detection unit 36 is detected. The video information signal from the video tape 14 read out from the signal reading unit 12 by controlling the mode switch unit 6 in accordance with the reproducing mode while the motor operation in accordance with the reproducing mode is performed by the 16 is performed. The regeneration operation for is performed.

According to the present invention made as described above, in the case where a video tape recorder reproduces a video tape containing a plurality of image programs, it is possible to detect a control signal recorded at a different duty ratio for each image program. As the selective reproduction can be made automatically, the viewer has the advantage of providing convenience for use.

Claims (1)

A recording function for recording the television broadcast signal tuned to the channel currently broadcast from the tuning means 2 and 4 on the recording surface of the video tape 14 according to the recording mode switching operation of the mode switch unit 6, and the playback mode switching. In a video tape recorder having a playback function of reproducing a video tape 14 recorded with a predetermined video program in accordance with an operation, In the case of reproducing the video tape 14 in which the present video program and the additional video program are recorded for each tape section, and a control signal having a different duty ratio for each video program is recorded together, the different duty ratio of the control signal is reproduced. Determining the type of video program recorded in the corresponding tape section by detecting a video signal, and performing selective playback by fast search to a desired video program according to a viewer's selection operation. How to select and play the recording section.