JPH0441512Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to an information recording device that records an address signal on each track when information is recorded in the form of tracks on a recording medium.

(b) Prior Art When recording information in this type of information recording device, the recording medium is scanned to find the last track on which information is recorded, and an address signal is output from the track located next to this track. and record information.

Here, in order to reduce the recording error rate when recording information, the information is played back immediately after recording is completed to detect the presence or absence of errors, and if a recording error occurs, the recording position of the information is significantly changed and the information is (This is done in RAW format,
Nikkei Electronics published November 21, 1983
Seen on P189-213. ).

By the way, when searching for and reproducing desired information from a recording medium on which information has already been recorded,
As seen in Publication No. 59-16347, the address signal is reproduced from the recording medium and compared with the address indicating the position of the desired information track, and if the difference between these addresses is greater than a predetermined setting value, the information is The reproducing means is moved at high speed, and when the address difference is smaller than the set value, the reproducing means is moved at low speed to search for a desired information track.

Here, when the reproducing means is moved at high speed as described above, the address signals that can be reproduced from the optical disk are of course coarse, and for example, only address signals every 30 tracks are reproduced, and a so-called coarse search is performed.

(c) Problems to be solved by the invention When information is recorded in the form of tracks on a recording medium as described above, in an information recording device that records an address signal on each track, especially as described above, the information is When re-recording is performed at a position far away from the initial recording device, a blank area where no information is recorded is formed around the re-recorded information track. When searching for information surrounded by this blank area, if the amount of information is small, for example, 20 tracks, when the playback means is moved at high speed as described above and a rough search is performed every 30 tracks, There is a risk that the information to be searched may be skipped and may not be searched at all. Therefore, it is not possible to perform such a rough search, and the reproducing means must be moved at a low speed to sequentially search the information tracks.
This results in a decrease in search operation speed.

The purpose of the present invention is to prevent a decrease in search operation speed.

(d) Means for Solving Problems The present invention is an information recording device that records an address signal on each track when recording information in the form of tracks on a recording medium, and is an information recording device that records an address signal on each track. A counter that counts the amount of information recorded at discontinuous positions from the position where the information is recorded, in units of tracks, and when the counted value of the counter does not reach a certain value, an address signal is sent to each track until this value is reached. and a control means for recording.

(E) Function The present invention counts the number of tracks on which information has been recorded, and when this counted value does not reach a predetermined value, information is recorded until it reaches the predetermined value. In particular, when there is a blank area around a track where information is recorded (that is, an area where no information or address signals are recorded), it is possible to quickly find the track where information and address signals are recorded, and the desired information can be found. Tracks can be searched quickly.

(f) Example The figure is a block diagram showing an example of the present invention. 1 is an optical disk as a recording medium on which information is recorded. Before use, the optical disc 1 only has grooves for recording information arranged concentrically or spirally at intervals of about 1 μm. Reference numeral 2 denotes a pick-up disposed below the optical disk, which is moved in the radial direction of the optical disk 1 along a rail 3 by a motor (not shown). Reference numeral 4 denotes a scale arranged parallel to the moving direction of the pickup 2, and the scale has a plurality of slits provided at intervals of about 100 μm. The movement of the pickup 2 can be controlled by interlocking a pair of optical sensors placed opposite each other with the scale 4 in between and detecting the signals from the optical sensors. 5 is a motor drive circuit for driving the motor.

Further, 6 is an information memory for recording information to be recorded, and 7 is a system control circuit for controlling the information recording operation and outputting an address signal of the track on which the information is recorded. A recording signal WR is output every time recording is performed. Further, the address signal n is incremented by 1 each time the recording signal WR is output. 8 is the recording signal
By counting WR, optical disk 1
This is a counter that counts the information recorded on the track in units of tracks, and this counting operation is performed when the control signal CL is at a low level. Reference numeral 9 denotes a signal processing circuit which inputs information equivalent to one track of the optical disk 1 from the information memory 6 by inputting the recording signal WR, modulates it, adds an address signal n to it, and outputs it. .

In this configuration, when recording information, the motor drive circuit 5 drives the pickup 2.
is moved, and the optical disc 1 is scanned. Then, the last track on which recording has already been made is searched, and the pickup 2 is moved to the next track position of the last track.

The system control circuit 7 adds 1 to the address signal of the final track and outputs this to the signal processing circuit 9 as an address signal n for information recording. Further, when the recording signal WR is output, the signal processing circuit 9 takes in one track's worth of information from the information memory 6, performs modulation processing on it, adds an address signal n to it, and outputs it. This information and the address signal n are recorded at a predetermined position on the optical disc 1 indicated by the address signal n. Note that at this time, the system control circuit 7 receives the control signal
CL is set to high level, and the counter 8 stops counting the recording signal WR.

Each time the recording of information for one track as described above is completed, the content of the address signal n is incremented by 1, and the information is sequentially recorded while being added to the information for each track.

In this case, when information recording for one track is completed, the presence or absence of a recording error is detected by the RAW method as described above. When a recording error is detected, the recording position on the optical disc 1 is significantly changed.

Assuming that there is an error in the information recorded at address N on the optical disk 1, the system control circuit 7 adds a predetermined value a to this address N to create a new address (N+a). It is output to the signal processing circuit 9 as an address signal n. At this time, the control signal CL is simultaneously set to low level.

Thereafter, when the recording signal WR is output, information is recorded accordingly and the counter 8 is incremented by one unless a recording error occurs. Then, by such recording operation, the counter 8
When the content of the counter 8 is counting a predetermined value, for example 50, the Q output becomes high level, the content of the counter 8 is reset, and the counting operation is stopped thereafter. On the other hand, when the content of the counter 8 has not reached 50, the Q output is at a low level, and the system control circuit 7 outputs the recording signal WR while changing the address signal n by 1. The signal processing circuit 9 repeatedly outputs the last recorded information and also outputs an address signal n that is changed and applied.
Then, when the contents of the counter 8 reach 50, the operation ends. Note that at this time, the signal processing circuit 9 may output only the address signal n output from the system control circuit 7 and record this on the optical disc 1.

This operation is performed every time a recording error occurs and the recording position of information is changed significantly. At the time of this change, the counter 8 is reset and thereafter counts the amount of information recorded.

Therefore, the information recorded on the optical disk 1 always includes at least 50 consecutive tracks of information, and when performing a rough search by moving the pick-up 2 at high speed, the information recorded on the optical disk 1 must be continuous, and when the pick-up 2 is fed at high speed to perform a rough search, the information recorded on the optical disk 1 must be continuously recorded. Since the address signal of any of these information tracks can be reproduced without skipping information, the information tracks of the entire area of the optical disk 1 can be reproduced one after another.
It is possible to perform the above-mentioned coarse search to some extent without searching one by one, and the search time can be shortened.

(G) Effects of the invention According to the invention, in an information recording device that records an address signal when recording information on a recording medium, it is possible to shorten the search time for searching for recorded information. .

[Brief explanation of the drawing]

The figure is a block diagram showing one embodiment of the present invention. 1... Optical disk, 7... System control circuit,
8...Counter.

Claims (1)

[Scope of utility model registration request] When recording information in a track shape on a recording medium,
An information recording device that records an address signal on each track, which includes a counter that counts the amount of information recorded in discontinuous positions from the position where information has already been recorded on the recording medium, in units of tracks; An information recording device comprising: control means for recording address signals on each track when the count value of the counter does not reach a certain constant value until the count value reaches the certain value.