JPH01268273A - Recording and reproducing method for video information - Google Patents

Abstract

PURPOSE:To simplify operation by storing the video information of a correspondent frame (or field) to a picture memory when a writing designating code is detected out of a reading output from a recording medium. CONSTITUTION:A video disk 1 is revolved and driven by a spindle motor 2 and the recording information of the disk are read by an optical pick-up 3. For example, the writing designating code is inserted to the frame (or field), to which picture information, etc., to show the index of music and a music number are recorded, for the video disk for a taped accompaniment and the video information are recorded. Simultaneously, for example, by recording a reading instructing code to the ending position of a chapter, the writing designating code is detected when the disk is played. Thus, the picture information to show the index of the correspondent music and music number can be automatically stored in the picture memory and the operation is simplified.

Description

[Detailed description of the invention] Technical field The present invention relates to a method for recording and reproducing video information.

BACKGROUND ART In a performance system for, for example, a video disc, which is a recording medium for video information, a user searches for a desired screen to be memorized from among the playback screens, and manually stores the video information of that screen in an image memory. Some devices have a function of manually reading out video information from the image memory and displaying it at certain times. According to this function, for example, when playing a so-called karaoke video disc, screen information showing a list of songs and song numbers is stored in the image memory, and when one song is finished, the screen information is transferred to the image. Since it can be read from the memory and displayed, it is possible to know the songs and song numbers recorded on the disc without looking at the jacket, which makes it easy to select songs and is extremely convenient.

However, since the above-described conventional functions are executed by key operations by the user, they have the drawback of being complicated to operate.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a video information recording and reproducing method that can automatically implement the above-mentioned functions.

The method for recording and reproducing video information according to the present invention involves inserting a write designation code into a predetermined frame (or field) and recording it together with the video information on a recording medium. When a write designation code is detected from , the video information of the corresponding frame (or field) is stored in the image memory, and when a read command code recorded at a predetermined recording position of the recording medium is detected, It is characterized in that the video information is read out from the image memory and displayed when the performance ends or when a read command is received from the outside.

Example Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

For example, on a video disk as a recording medium on which video information is recorded by the recording method according to the present invention, when recording video information, video information of a desired screen, for example, a song and song number in the case of a karaoke video disk. A writing designation code is recorded in a frame (or field) in which screen information showing a list of information, etc.
A read command code is recorded at the end position of a chapter (referred to as a chapter). In the case of a normal video disc, this write designation code and read command code are inserted into a 24-bit bi-phase code that is inserted as a control code in the back porch of the horizontal synchronizing signal, and are also inserted into the EFM (Eight to Pourteen
Modulation) In the case of a video disc with digital audio recorded by digital audio signals or frequency division multiplexing, the modulation is inserted into the so-called user's bit (R-W) in the subcode of the CD format. The number of screens to be written to is not limited to one screen; in the case of n (natural number) screens, n frame (or field) memories will be prepared on the player side, so writing and A code specifying the memory to be read is also inserted at the same time.

In this way, for example, for a karaoke video disc,
To record video information by inserting a write specification code into a frame (or field) where screen information showing a list of songs and song numbers is recorded, and at the same time record a read command code at the end position of a chapter, for example. Therefore, when playing the disc, by detecting the write designation code, screen information showing a list of the corresponding songs and song numbers can be automatically stored in the image memory.
Furthermore, by detecting the read command code, video information can be automatically read from the image memory and screen information showing a list of songs and song numbers can be displayed.

Note that it is not essential to insert the read command code, and it is also possible to read the video information from the image memory and display it when the performance ends or when a read command is received from the outside.

The application is not limited to video discs for karaoke; for example, in the case of a video disc recording the contents of an encyclopedia, a designation code is written in the video information on the table of contents screen inserted at the beginning of each chapter. By inserting and storing the table of contents, the table of contents can be displayed at the current playback position without moving the pickup, so the table of contents can be freely referenced.

Furthermore, it is also possible to record the video information to be stored and its write designation code in the lead-in area of the video disc. According to this, the T recorded in the lead-in area.

Desired video information can be stored in the image memory while C (Table of Contents) information is being read, so not only can the lead-in area be used effectively, but even when set up normally, the stored video information can be stored in the image memory. is not displayed, and there is no waste of time.

FIG. 1 is a block diagram showing an example of the configuration of a video disc performance system in which video information is recorded by the recording method according to the present invention. In the figure, a video disc 1 is rotationally driven by a spindle motor 2, and recorded information is read by an optical pickup 3.

The optical pickup 3 includes an optical system including a laser diode as a light source, an objective lens, a photodetector, etc., a focus actuator that drives the objective lens in the direction of its optical axis with respect to the information recording surface of the disk 1, and light emitted from the pickup 3. A tracking actuator and the like are built in to bias the light beam spot in the disk radial direction relative to the recording track.

A current detection circuit 4 is provided for detecting a coil current supplied to a coil (not shown) for driving a tracking actuator in this pickup 3. A current detection signal is supplied to the slider servo circuit 5. In the slider servo circuit 5, the current detection signal is amplified and phase compensated, and its output becomes a drive signal for the slider motor 7 via a motor drive circuit 6. This slider motor 7 serves as a driving source for a slider 8 which is equipped with a pickup 3 and is movable in the radial direction of the disk. The slider servo circuit 5 is configured to output a drive signal of a predetermined level in place of the phase-compensated current detection signal in response to a movement command.

The read output of the pickup 3 is FM demodulated by the video demodulation circuit 9, and is supplied to the decoder 10 via the changeover switch SW1, and becomes a direct video output via the changeover switch SW2. Supplied. Decoder 10 is Y/
It includes a C separation circuit and the like, and outputs the reproduced video signal as a Y (luminance) signal and RY, BY (color difference) signals. Y
The signal is digitized by the AD converter 13 and supplied to the field memory 14, and the RY and BY signals are digitized by the AD converter 16 via the switching circuit 15 and supplied to the field memory 17. Write control of the field memory 14.17 and designation of write blocks are performed by the memory controller 1 which receives vertical synchronization signals and horizontal synchronization signals generated from the synchronization generation circuit 18.
It is done by 9. The digitized Y signal read from the field memory 14 is converted into an analog signal by a DA converter 20, and the read data of the field memory 17 is converted into digital mols R-Y, B-Y by a multiplex circuit 21.
After being made into signals, they are converted into analog signals by DA converters 22 and 2B, respectively, and these Y signals, RY, and BY signals are combined by an encoder 24, and are output as a video output via a changeover switch SW2. The changeover switches sw, , sw2 are normally in a state of selecting the reproduced video information from the video demodulation circuit 9, and SW2 is switched to the opposite side by a switching command from the system controller 26, which will be described later. S
WI is for writing a black screen into the field memory 14°17.

The synchronization separation circuit 11 separates and extracts a reproduced vertical synchronizing signal, a reproduced horizontal synchronizing signal, and a reproduced composite synchronizing signal contained in the reproduced video signal. The separated and extracted reproduced horizontal synchronizing signal is supplied to the spindle servo circuit 25, the reproduced vertical synchronizing signal to the system controller 26, and the reproduced composite synchronizing signal to the decoder 10 via the changeover switch SW1. The spindle servo circuit 25 generates a control signal according to the phase difference between the reproduction horizontal synchronization signal and the reference horizontal synchronization signal supplied from the system controller 26, and this control signal is transmitted to the spindle motor 2 via the motor drive circuit 27.
becomes the drive signal. The 24-bit code decoder 12 decodes a 24-bit biphase code inserted as a control code into the back porch of the horizontal synchronizing signal. This 24-bit bi-phase code includes a chapter number, lead-out code, etc. The output data of 24-bit code decoder 12 is provided to system controller 26.

The system controller 26 includes a processor, ROM, R
It is composed of a microcomputer such as AM. The system controller 26 receives the reproduced vertical synchronization signal separated and extracted by the synchronization separation circuit 11, the output data of the 24-bit code decoder 12, data corresponding to key operations on the operation keys 28, and the like. In this system controller 26, a processor processes input signals according to a program stored in advance in the ROM, and a track jump drive circuit that drives the slider servo circuit 5 and the tracking actuator in the pickup 3 in response to a jump command. 29 drive control and switching SW.

It controls the switching of SW2 and also supplies a write command signal and a write block designation signal to the memory controller 19.

Next, when playing a video disc, an image □ memory (field memory 14.17) of playback video information executed by the processor of the system controller 26
The procedures for writing and reading processing will be explained according to the flowcharts of FIGS. 2 and 3.

In FIG. 2 showing the procedure of the write process, the processor monitors whether or not a write designation code exists in the output data of the 24-bit code decoder 12 in step S1.
), when a write designation code is detected, the generation of a reproduction vertical synchronization signal from the synchronization separation circuit 11 is monitored (step S2), and when a reproduction vertical synchronization signal is detected, a write command is issued to the memory controller 19 (step S2). S
3). As a result, storage of the playback video information of the field corresponding to the write designation code is started in the field memory 14.17. The processor also
The generation of the reproduced vertical synchronizing signal from the synchronization separation circuit 11 is monitored (step S4), and when the reproduced vertical synchronizing signal is detected,
Generation of write commands to the memory controller 19 is stopped (step S5). As a result, video information for one field is stored in the field memory 14.17.

Subsequently, in FIG. 3 showing the procedure of the read processing, the processor monitors whether or not a read command code exists in the output data of the 24-bit code decoder 12 in step S6. ), when the read command code is detected, the selector switch SW2 is switched to the encoder 24 side and the video information stored in the field memory 14-17 is output as a video (step S7). If the read command code is not input, it is determined whether or not there is human power to press the read command key of the operation keys 28 (step S3).
, If there is a read command using the read command key,
Proceeding to step S7, the changeover switch SW2 is switched to the encoder 24 side, and the video information stored in the field memory 14.17 is output as a video. If no read command code is input and no read command is issued by the read command key, the changeover switch SW2 is not switched and the video information currently being played is directly output as a video (step S9).

Through the above processing, for example, in a karaoke video disc, a write specification code is inserted and recorded in the field where screen information showing a list of songs and song numbers is recorded, and it is also read out at the end position of a chapter (song). By recording the command code, a screen showing a list of songs and song numbers will be automatically displayed when you finish singing one song, so you can know what songs are on the disc without looking at the jacket. Since the songs and song numbers can be grasped, song selection becomes easier.

In the above embodiment, a field memory is used as the image memory to store video information for one field, but a frame memory may be used to store video information for one frame. Of course.

Effects of the Invention As explained above, according to the method for recording and reproducing video information according to the present invention, a write designation code is inserted into a predetermined frame (or field) and recorded together with the video information on a recording medium, and the playback of this recording medium is performed. When a write designation code is detected in the readout, the video information of the corresponding frame (or field) is stored in the image memory, and the readout recorded at a predetermined recording position on the recording medium is performed. An operation that displays the desired screen when necessary by reading video information from the image memory and displaying it when a command code is detected, when a performance ends, or when a read command is received from an external source. can be done automatically.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of the configuration of a video disc performance system in which video information is recorded by the recording method according to the present invention, FIG. 2 is a flowchart showing the processing procedure of the write mode according to the write designation mode, and FIG. is a flowchart = 15 = showing the processing procedure of the read mode based on the read command mode. Explanation of symbols of main parts 1...Video disc 3...Pickup 9...Video demodulation circuit 11...Synchronization separation circuit 12... 24 bit code decoder 14.17
...Field memory 19...Memory controller 26...System controller Applicant Pioneer Corporation

Claims (4)

[Claims] (1) A write designation code is inserted into a predetermined frame (or field) and recorded on a recording medium together with video information, and when this recording medium is played, the write designation code is detected from the read output from the recording medium. 1. A method for recording and reproducing video information, which comprises: storing video information of a corresponding frame (or field) in an image memory. (2) A read command code is recorded at a predetermined recording position on the recording medium, and when the read command code is detected from the read output during performance, video information is read from the image memory and displayed. 2. A method for recording and reproducing video information according to claim 1, characterized in that: (3) The video information recording and reproducing method according to claim 1, characterized in that the video information is read out from the image memory and displayed at the end of the performance. (4) The video information recording and reproducing method according to claim 1, further comprising reading video information from the image memory and displaying it in response to an external read command.