JPH0574064A - Optical information reproducing device - Google Patents

Abstract

PURPOSE:To reduce the generating frequency of an error by executing the retry of reproducing operation even when an error data is detected in a reproduced data. CONSTITUTION:When a disk reproducing instruction is received from a host 6 by a control circuit 4, the reproducing of a disk 1 is executed. In this circuit 4, when the erroneous data is detected during reproduction, the transfer of the reproduced data to the host 6 is stopped temporarily, the address of a correction impossible data is stored in an address monitoring means 7, the reproducing operation of the relevant address position of the disk 1 is performed again. As the result, in the case reproducing is implemented normally, the data is reproduced and transferred successively. When the error data is detected again, further the retry of the reproducing operation is performed by a fixed number of times, when a fact that the error correction is impossible, is confirmed finally, an error message and an error generating address are returned to the host and the reproducing operation is stopped. Thus, the generating frequency of the error correction impossible error is reduced more.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CD-ROM (hereinafter referred to as a CD-ROM) for reproducing a disc on which music, data, video or a mixture of these information is recorded.
The present invention relates to an optical information reproducing device such as a player.

[0002]

2. Description of the Related Art A conventional optical information reproducing apparatus is shown in FIGS.
The CD-ROM player will be described. Figure 5 shows CD-
FIG. 6 is a block diagram of a ROM player, and FIG. 6 is an explanatory diagram explaining the same operation. In FIG. 5, 1 is a disk, 2 is an optical head, 3 is a reproducing means, 4 is a control circuit,
Reference numeral 5 is a data transfer means, and 6 is a host system (hereinafter referred to as a host).

The conventional CD-RO configured as described above
The operation of the M player will be described with reference to FIG.
When the disc reproducing command is received from the host 6, the reproducing means 3 is operated to reproduce the disc 1 via the optical head. When data that cannot be error-corrected from the reproduced data (hereinafter referred to as error data) is detected during reproduction, the control circuit 4 stops the transfer of the reproduced data to the host 6 as detection of error-correctable data, and cannot correct the error. Error message and the address (error occurrence address) at which the transfer of the data obtained from the data transfer means 5 to the host 6 has been stopped are returned to the host 6, the operation of the reproducing means 3 is stopped, and the operation for the disk reproducing command is ended. It was something to do.

[0004]

However, in the above-mentioned conventional configuration, when error data is detected in the reproduced data by the control circuit during reproduction, the error message that the error cannot be corrected and the address in which the error has occurred are sent to the host 6 However, since the noise caused by dirt and dust on the disc in the detected reproduction data is also regarded as an error due to a defect in the medium, the frequency of reproduction errors is increased. was there.

It is an object of the present invention to provide an optical information reproducing device such as a CD-ROM player capable of reducing the frequency of error occurrence.

[0006]

In order to solve the above-mentioned problems, an optical information reproducing apparatus of the present invention is provided with an address monitoring means for monitoring the address of the disk when reproducing the disk, and a control circuit for controlling the reproducing means. When erroneous data is detected in the reproduced data, the transfer of the reproduced data to the host system is temporarily stopped, the address position of the disc where the error cannot be corrected is obtained by this address monitoring means, and the reproducing operation is executed a certain number of times. It is provided with a circuit.

[0007]

With this configuration, the optical information reproducing apparatus can reduce the frequency of occurrence of an error that an error cannot be corrected by retrying the reproducing operation even when error data is detected in the reproduced data. Therefore, the frequency of occurrence of errors in the device itself is reduced, and the performance of the optical information reproducing device can be improved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the optical information reproducing apparatus of the present invention will be described below with reference to FIGS.

(Embodiment 1) FIGS. 1 and 2 show a first embodiment of the present invention. FIG. 1 is a block diagram of a CD-ROM player, and FIG. 2 is an explanatory view for explaining the same operation. Is. The same parts as in the prior art will be denoted by the same reference numerals, and 1 will be a disk, 2 will be an optical head, and 3 will be
Is a reproducing means, 4 is a control circuit, 5 is a data transfer means, and 6 is a host. Also, 7 is the disc 1 when the disc is played.
It is an address monitoring means for monitoring the address of.

The CD-R of the present invention constructed as described above
The operation of the OM player will be described below. As shown in FIG. 2, when the control circuit 4 receives a disc reproducing command from the host 6, the reproducing means 3 is operated to reproduce the disc 1. When an error data is detected in the reproduction data during reproduction, the control circuit 4 temporarily stops the transfer of the reproduction data to the host 6 and stores the address of the uncorrectable data in the address monitoring means 7, The reproducing operation at the corresponding address position of the disk 1 is performed by the reproducing means 3 with the optical head 2.
To try again via. As a result, if the data can be reproduced normally, the data is reproduced and transferred sequentially, and the operation for the reproduction command is completed. When error data is detected again, the above-mentioned reproduction operation is retried a certain number of times (for example, 10 times), and finally, when error correction is impossible, an error message and an error occurrence address are sent to the host 6. Then, the operation of the reproducing means 3 is stopped and the operation for the disk reproducing command is completed.

According to the above construction, when error data is detected in the reproduction data, the reproduction operation is retried a certain number of times, so that error data due to noise or the like at the time of detection is reduced and thus error correction is impossible. The effect that the frequency of occurrence of the error is reduced is obtained.

(Second Embodiment) FIGS. 3 and 4 show a second embodiment of the optical information reproducing apparatus of the present invention, and FIG. 3 shows a CD.
-A block diagram of the ROM player, FIG.
[Fig. 6] is an explanatory diagram explaining the same operation. In FIG. 3, the same parts as those shown in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted. In this embodiment, the cleaning means 8 for wiping the dirt of the reproducing surface of the disk 1 on the optical head 2 part. The configuration is provided with.

The CD of the above embodiment constructed as described above
The operation of the ROM player will be described. When erroneous data is detected in the reproduction data, the control circuit 4 suspends the transfer of the reproduction data to the host 6, and the cleaning means 8 is used.
Thus, the operation of wiping off the dirt on the reproducing surface of the disc 1 is executed, and thereafter, the reproducing operation of the corresponding address position is executed a certain number of times.

In addition to the effect of the above-described first embodiment by the above configuration and operation, the operation of wiping the dirt on the reproducing surface is executed, so that the retry of the reproducing operation when the error data is detected in the reproduced data is successful. As a result, it is possible to obtain an effect that the rate of occurrence of error correction becomes higher and the frequency of occurrence of error uncorrectable errors becomes lower. Further, since the cleaning means 8 is attached to the optical head 2 to wipe off the dirt on the reproducing surface of the disk 1, it is possible to surely clean the error-correctable data position on the reproducing surface.

Although the cleaning means 8 is attached to the portion of the optical head 2 in this embodiment, the cleaning means 8 is not limited to the above portion and may be attached.

[0016]

As described above, the present invention comprises address monitoring means for monitoring the address of the disc when the disc is reproduced.
By providing the data transfer means for transferring the reproduced data obtained by reproducing the disc to the host system and the control circuit for controlling the reproducing means, the retry of the reproducing operation is performed even when the error data is detected in the reproduced data. By executing the above, it is possible to realize an excellent optical information reproducing apparatus capable of reducing the frequency of occurrence of an error that an error cannot be corrected. Furthermore, by further providing a cleaning means, it becomes possible to perform an operation of wiping dirt off the reproduction surface, and the rate of successful retry of the reproduction operation when error data is detected in the reproduction data increases, and error correction is performed. This has the effect of reducing the frequency of occurrence of impossible errors.

[Brief description of drawings]

FIG. 1 is a block diagram of a CD-ROM player which is an embodiment of an optical information reproducing apparatus of the present invention.

FIG. 2 is an explanatory diagram of the same operation.

FIG. 3 is a block diagram of a CD-ROM player according to another embodiment.

FIG. 4 is an explanatory diagram of the same operation.

FIG. 5 is a block diagram of a conventional CD-ROM player.

FIG. 6 is an explanatory diagram of the same operation.

[Explanation of symbols]

 1 Disk 2 Optical Head 3 Playback Means 4 Control Circuit 5 Data Transfer Means 6 Host 7 Address Monitoring Means 8 Cleaning Means

Claims (3)

[Claims] 1. A reproducing means for detecting reproduced data from a disc, an address monitoring means for monitoring an address of the disc of the reproduced data, a data transfer means for transferring the obtained reproduced data to a host, and the reproducing means. In addition to performing control, when the reproduced data is data that cannot be error-corrected,
And a control circuit for causing the reproducing means to detect the data on the disk at this address based on the address data obtained by the address monitoring means a fixed number of times until the normal reproducing data is obtained. Optical information reproducing device. 2. The optical information reproducing apparatus according to claim 1, further comprising cleaning means for wiping dirt on the reproducing surface of the disc by the control circuit when the reproduced data is data that cannot be error-corrected. 3. A cleaning means mounted on the optical head.
The described optical information reproducing device.