JPH0718063Y2 - Information recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an information recording apparatus for recording information in a track shape on a recording medium.

(B) Conventional technology In an apparatus capable of recording information on a recording medium, for example, an optical disk document file apparatus capable of arbitrarily recording document information or the like on an optical disk by a laser beam, an optical disk is currently partly damaged by dust or scratches during manufacturing. Since a recording error will occur, the error correction process is an essential requirement. As such an error correction process, for example, “Nikkei Electronics” No.313
As can be seen from P105 to 120 (1983, 3, 28), there is a method of adding an error correction code such as a CRC code or a sphere code to recorded information and detecting and correcting the error.

Further, after the recording of the information on the optical disk is completed, this information is immediately reproduced to check the error. If the recording is defective, RAW (read
The after write method prevents erroneous recording of information.

(C) Problems to be solved by the invention However, since the distance between the information tracks on the optical disk is as small as about 2 μm, the above-mentioned dust and scratches are often present over a plurality of tracks. Therefore, when there is a recording error by the RAW method as described above, even if the recording is performed again on the adjacent track, the recording error occurs again, and the information recording operation has to be performed a plurality of times.
It takes a great deal of time to record information.

An object of the present invention is to prevent the information recording time from undesirably increasing.

(D) Means for Solving the Problems The present invention, after recording information in a track shape on a recording medium,
Immediately reproducing this information, the presence or absence of an error is detected by the error detecting means, and if there is an error, in an information recording apparatus for re-recording the information, a recording address generating means for sequentially generating addresses for recording the information, Equipped with counting means for counting the number of consecutive signal errors based on the error detection output of the error detecting means, and address changing means for changing the address when the count value of the counting means exceeds a certain value. It is characterized by

(E) Action The present invention is to separate the information recording positions by a certain distance when recording errors occur continuously a certain number of times or more.

(F) Embodiment FIG. 1 is a block circuit diagram showing an embodiment of the present invention. The recording error detection circuit (1) is an address (N) of the optical disc designated by the recording address latch circuit (2).
Information is recorded by inputting the WR signal output from the system control circuit (3) through the OR gate (8). After such recording is completed, the recording error detection circuit (1) immediately reproduces the recorded information and detects the presence or absence of an error in the information. After detection, the recording error detection circuit (1) outputs a CHECK signal and, if there is an error, outputs an ERROR signal and re-records information. If there is no error, END
Output a signal. At the time of re-recording the above information, the system control circuit (3) does not output the WR signal but re-recording is performed by the input of the AND gate (9) for inputting the CHECK signal and the ERROR signal.

The shift register (4) inputs an ERROR signal, and this input signal is shifted by the CHECK signal. Further, the shift register (4) is cleared of all contents when the CL input is at high level. In this embodiment, the shift register (4) is composed of 3 bits, and the output of each bit is
Q _{0 to} Q ₂ are applied to the AND gate (5).

The monostable multi (6) inputs the signal from the AND gate (5) and outputs the Q signal.

The recording address latch circuit (2) inputs and holds the recording address (n) by the nL signal from the system control circuit (3), and the recording address (n) by the CHECK signal output from the recording error detection circuit (1). ) Is incremented by 1 and these are output to the recording error detection circuit (1) as recording addresses (N). Further, the recording address latch circuit (2) takes in the value (b) held in the address change latch circuit (7) by inputting the Q signal from the monostable multi (6) and adds it. And outputs it as a recording address (N).

Further, the OR gate (10) inputs the WR signal and the Q signal,
This output is used as the CL input of the shift register (4).

Then, the circuit operation of such a configuration will be described with reference to the signal waveform diagram of FIG. In the figure, period I
Indicates a case where no information recording failure occurred on the optical disk, and period II indicates a case where information recording failure on the optical disk occurred three times in a row.

The system control circuit (3) outputs the recording start address (n) and nL signal to the recording address latch circuit (2) and outputs the WR signal to the recording error detection circuit (1). The recording error detection circuit (1) inputs (n) held by the recording address latch circuit (2) as a recording address (N) and records information in response to the WR signal. And
After such recording, the recording error detection circuit (1) detects the presence or absence of a recording error in the recorded information and outputs a CHECK signal.

When no error is detected (period I), the recording error detection circuit (1) outputs an END signal to the system control circuit (3) and enters a standby state for recording new information.

At this time, the recording address latch circuit (2) inputs one CHECK signal, so that the content is (n + 1).

Next, when a WR signal is issued from the system control circuit (3) to record new information, the recording error detection circuit (1) causes the recording address latch circuit (2) to hold the recording address (N = The information is recorded based on (n + 1), and the presence or absence of an error is detected in the same manner as described above.

When an error is detected (period II), the recording error detection circuit (1) outputs a CHECK signal to the recording address latch circuit (2) and an ERROR signal to the shift register (4). . As a result, the content of the recording address latch circuit (2) becomes n + 2, and the Q ₀ output of the shift register (4) becomes high level.

Then, the recording error detection circuit (1) rewrites the above-mentioned information in which the recording error is detected to the recording address (N = n + 2) indicated by the recording address latch circuit (2) based on the signal from the AND gate (9). Record.

In the recording of such information, when an error is detected three times in succession, the outputs of the shift register (4) Q _{0 to} Q ₂ are all at a high level, and the output of the AND gate (5) is a monostable multi (. 6) is applied. Therefore, the monostable multi (6) outputs a high-level Q signal, and this Q output is applied to the CL input of the shift register (4) via the OR gate (10) and the contents of the shift register (4) are And the recording address latch circuit (2)
Applied to. The recording address latch circuit (2) takes in the value (b) held by the address change latch circuit (7) by inputting this Q signal, and this value (b) is stored in the previous recording address latch circuit. This value (n + 4 +) is added to the content of (2) (n + 4 in this case).
Hold b) as a new recording address (N).

Then, the recording error detection circuit (1) records information based on the recording address (n + 4 + b). Therefore, the information is recorded on the track that is sufficiently distant from the area where the error continuously occurs.

As described above, according to the present embodiment, when a recording error is detected three times in a row, the next information recording address is set so as to be sufficiently separated from the address where the recording error occurs, thereby making a plurality of When dust, scratches, etc. exist across the tracks, the re-recording of information is prevented from being unnecessarily repeated.

The conditions for changing the recording address settings as described above are as follows:
The number of times the recording error is detected is not limited to three times, and the number of times may be set arbitrarily.

(G) Effect of the Invention According to the present invention, it is possible to prevent wasteful recording of information on these tracks when it is thought that recording defects will occur across a plurality of tracks due to dust, scratches, and the like. Therefore, an increase in information recording time can be suppressed.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a block diagram and FIG. 2 is a signal waveform diagram. (1) ... Recording error detection circuit, (2) ... Recording address latch circuit, (4) ... Shift register, (7) ... Address change latch circuit.

Claims (1)

[Scope of utility model registration request] 1. When information is recorded at a predetermined address of a track of a recording medium formed in the order of addresses, the information recorded at the predetermined address is immediately reproduced, and the presence or absence of an error is detected by an error detecting means. In an information recording device for re-recording information at the next address, an address generating means for sequentially updating addresses for recording information,
Counting means for counting the number of consecutive signal errors based on the error detection output of the error detecting means, and a plurality of addresses generated by the address generating means when the count value of the counting means exceeds a certain value. An information recording apparatus comprising: an address changing unit for updating.