JPS60253059A - Recording and reproducing disk and its device - Google Patents

Abstract

PURPOSE:To obtain a recording and reproducing device having separately a surface which can be recorded and reproduced freely by recording a read and write control signal of a track of the other surface in a track of one surface of a disk, and executing recording and reproduction to and from one surface in accordance with said control signal or an external input signal. CONSTITUTION:An A surface 2 of a disk 1 is a video disk of a laser system, etc. in which a movie has been recorded, a B surface 3 is a magnetic recording film, and an A head 4 and a B head 6 are driven separately. Also, a control signal is entered an A track, a B system is operated in accordance with its signal, and a subtitle, etc. are recorded in the B surface or reproduced. A control signal enters continuously signals (a), (b), (c), etc. in a suitable part of the A track extending over several tracks, and when the signal (a) is detected, the B head is placed on a track B#1, and when the signal (b) is detected, the subtitle is read by the B head, sent to a memory 11, a controller 12 synthesizes its data by a synthesizing circuit 23, outputs it as a picture, and when the signal (c) is detected, the subtitle is erased. The control signal is omitted by said continuous entry first, by an external signal from a button 22 secondly, and entering and comparing the subtitle number in both tracks thirdly.

Description

DETAILED DESCRIPTION OF THE INVENTION Conventional disks, particularly video disks, regardless of whether they are laser type or capacitive type, do not have the ability to be used repeatedly as a recording medium after the disk medium is manufactured. The present invention relates to a disk medium (hereinafter referred to as a disk) having a separate surface on which recording and reproduction can be freely performed, and a recording and reproducing apparatus thereof (hereinafter referred to as an apparatus).

In particular, subtitle superimposition of movie videos (hereinafter referred to as subtitle superimposition), tables and drawings related to still images, etc.
The purpose is to create a disk and device that can freely record and play musical notes.

FIG. 1 shows an example of the configuration of the disk and device of the present invention. One side A2 of the double-sided disc 1 is a laser type or capacitive video disc on which movies are recorded, and has a zigzag track with a pitch of about 1.6 microns. read out. One side B3 is a magnetic recording film,
You can freely record and reproduce magnetic data using a magnetic head. The head for the A side (hereinafter referred to as the A head) 4 is moved by an A driving material structure 5, and the magnetic head (hereinafter referred to as the B head) 6 is moved by a B driving material structure 7, and each is moved and positioned separately. .

The track 8 formed on B (hereinafter referred to as B track) has a concentric or spiral shape, and the width and pitch are currently several to several times larger than the Caesar type.

Therefore, even if they are on the front and back sides of the same disk, the total number of tracks on A (hereinafter referred to as A tracks) 9 is extremely large, and on B, one frame of subtitles can be created with the information of one track. Suitable for still images and subtitles. Both heads are
There is no need to synchronously trace tracks with the same radius ■, for example, according to the order of A tracks that require subtitles.
Make the B tracks correspond to each other in order. A control signal is written in an appropriate part of the A track, and in response to the signal, the B drive material structure is moved to B and the peripheral circuits are operated. Now, track number 1 of A (hereinafter referred to as A#1)
The first subtitle super is displayed at A#750, and then the first subtitle is displayed at A#750,
It disappears at #800, the second subtitle super is displayed at A#900, disappears at A#1050, and since subtitles are not needed for a long time after that, I take one turn at A#1600 and move on to B.D- shall be kept in a safe place. The above operation is realized as follows in the present invention.

First, load the disk containing the control signal onto the A track as shown below. The following shows the combinations of [A track number: control signal].

[A#4: A], [A#5: A], [A#6: A], [
A#749: Otsu], [A#750: Otsu], [A#751
:Otsu], [A#799:C], [A#800:C], [
A#801: Page], [A#899: Otsu], [A#900
:Otsu], [A#901:Otsu], [A#1049:C],
[A#1050: C], [A#1051: C], [A#
1599: Ding], [A#1600: Ding], [A#160
1: D] Here, A, B, and C are signals made up of, for example, several bits, and are recorded on the A track by conventional means. In the top row,
For example, A#4, A#5, and A#6 consecutively have the same A signal, which indicates repeated entry, which will be described later. Furthermore, A
Let us say that #4 to A#6, A#749 to A#751, etc. are one request.

The procedure for recording subtitles on the B track while reproducing the A track, and composing both during playback to superimpose the subtitles is as follows.

If A#5 detects A as a request, it will be routed to B and automatically placed on B#1.

When A#750 detects request B, it causes the B head on B#1 to read the subtitle data and transfers the subtitle data to the bass memory 11.
The B head immediately moves onto the adjacent track B#2 and waits. On the other hand, the controller 12 extracts data from the buffer memory, synthesizes it using conventional means, and outputs the data as an image.

If request C is detected at A#800, the controller stops extracting and combining data from the buffer memory. Subtitles disappear.

When request B is detected at A#900, the B head reads B#2, sends it to the buffer memory, immediately moves onto the next track B#3, and waits.

The controller is extracted from the buffer memory and synthesized.
Video output.

If request C is detected at A#1050, the controller stops extraction and synthesis from the buffer memory.

If a request page is detected at A#1600, head B is unloaded.

The operations corresponding to A, B, C, and C above can be performed using a microprocessor or the like.

By the way, in order to deal with missing control signals (track skips, read failures, etc.) and erroneous signals (noise, circuit abnormalities, etc.),
In the present invention, three methods were used.

First of all, even if some signal loss or erroneous signals occur, the same control signal is repeated multiple times for a given request in order to determine whether the request is normal or not. For example, when a certain code is read, the code determination circuit 13 inputs it into the code buffer V14, and if the next code read is another code, it sequentially inputs it into the code buffer W15 and then X16. If it becomes necessary. You can also increase the number of buffers.

If the same code as above comes, it will be judged as a request signal and put into the signal register 17.
Notify the controller and then clear each code buffer. Above, the judgment is made by reading twice, but reading three or four times is also possible. However, a counter and its processing steps increase for each buffer. After this, even if the same code written repeatedly comes, it will be read as the same as the signal register contents. If a different code is received, repeat the above steps from the beginning. On the other hand, the controller is informed by the code determination circuit 18.
When it receives a signal, it immediately starts working. If consecutive requests require the same operation, it is possible to prepare controllers with different operation contents but with different signals.

The second and fifth device is to write the corresponding subtitle super number 19 in combination with the control signal B when writing the A track, and also write the Ya number such as 20 in the corresponding B track. The device puts the number obtained from the A track into the A number register 21 and sends the subtitle data to the buffer memory when the number obtained from the B track is equal to this.

If both numbers are out of sync, move the B head back or forward by the difference in tracks to achieve synchronization.

This synchronization by number comparison may be performed intermittently on appropriate A and B tracks.

The fifth device is to manually input a control signal to the device from the outside using the input button 22, move the B bed position as necessary, and synchronize. It can also be configured to control other operations such as forward and backward movement. Incidentally, the procedure and operation for writing subtitle data to the B track are almost the same as all of the above.

(1) Normally, one subtitle appears and disappears for a few seconds, but by focusing on this time period, we can use this time to pre-display adjacent or next subtitle data on a magnetic head that takes a long time to access. ■ Only positioning to the magnetic field containing .

(2) Since it is not affected by signal loss or erroneous signals, the disk and device are configured so that the control signal for one request is generated multiple times and detected without excess or deficiency.

(3) Furthermore, if necessary, subtitle numbers are written on both tracks A and B along with the O signal, so that synchronization can be maintained even when a large track skipping abnormality occurs. Here, the above (1
) can also be applied.

(4) Furthermore, if necessary, input control signals from the outside and perform material configuration to assist in synchronization adjustment.

(5) The timing for erasing the displayed subtitles is given by the control signal of the A track, so that an arbitrary subtitle display time can be set each time.

(6) When subtitles are not required for a long time, the unloading/loading of the B head is controlled by the A track control signal, thereby extending the life of the disk and magnetic head.

The present invention has the effect of combining the various devices mentioned above,
This enabled the smooth implementation of the objectives.

In addition to subtitles, tables, figures, etc. can be displayed in a composite manner.

The above method was explained for superimposing subtitles on movie videos, but it can also be used to a great extent for educational programs, game materials, synthetic diagrams, formulas, answers, hints, musical notes, lyrics, etc. in electronic files, etc. can get.

[Brief explanation of drawings]

FIG. 1 shows an example of the configuration of a disk medium and a recording/reproducing apparatus according to the present invention. 1...Double-sided disc 2...A side 3...B side 4...A head
5...A drive material structure 6...B head 7...B drive material structure 8...B track 9...A track 10...B signal 11...
Buffer memory 12...Controller 13...Code judgment circuit 14...Code buffer V15...Code buffer W
16...Code buffer X17...Signal register 18...
Notice 19...Subtitle super number (A track) 20...Subtitle super number (B track) 21...A number register 22...
Input button 23...Composition circuit 24...Video output 25...B track writing data Patent applicant Hikaru Yokoegawa

Claims (1)

[Claims] A disk in which a B track read/write control signal is recorded on the A track, and a device that records and reproduces the B track based on the control signal or external input signal.