JP2001035097A - Disk reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk reproducing device for preventing the generation of discontinuous data transfer. SOLUTION: Concerning the disk reproducing device for intermittently reading data recorded on a disk 1, storing them in a memory means 4, reading the data stored in this memory means 4 at a speed lower than the speed of the said read and outputting them as a regenerative output signal 106, this disk reproducing device is provided with a data working means 30 for working discontinuous data so as to continue these data and storing them in the memory means 4 again when data contents 301 in the memory means 4 are monitored and the discontinuous data are detected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk reproducing apparatus for reproducing a disk-shaped recording medium such as an optical disk.

[0002]

2. Description of the Related Art In a conventional disk reproducing apparatus, as shown in FIG. 6, a predetermined recording unit (hereinafter abbreviated as a sector) is recorded on a track formed on a recording surface of a disk 1 which is a disk-shaped recording medium. An optical pickup 2 for picking up a digital signal, and an output 101 of the optical pickup 2
Means 3 for playing back at a transfer rate higher than the predetermined transfer rate of the playback output data 103, and the predetermined transfer rate at which the playback data 102 obtained by the playback means 3 is intermittently written and which is slower than the writing speed of the playback data 102. A memory means 4 which is continuously read as reproduction output data 103 at a speed; a write address generation means 5 which generates a write address 104 of the memory means 4 according to a reproduction instruction 110 given;
5, the read address generating means 6 for generating the readout data 5, the readout output means 103 for outputting the readout output data 103 continuously read out from the memory means 4 as a readout output signal 106, and the optical pickup 2 on the track of the disk 1. Tracking control means 8 for on-tracking and accessing a desired track; error detection means 9 for detecting a read error from the reproduction data 102 obtained by the reproduction means 3 and outputting an error detection signal 107 for each sector;
A microprocessor 10 that detects a difference between the write address 104 and the read address 105 and outputs a reproduction command 110 when the difference is equal to or smaller than a predetermined comparison value, and determines a defective portion of the disk 1 provided inside the microprocessor 10. It comprises a defect processing section 20 as a defect processing means for controlling the tracking control means 8.

[0003] When the microprocessor 10 receives an error detection signal 107 from the error detecting means 9, a defect processing unit 20 provided inside the microprocessor 10 is provided.
The disk 1 corresponding to the error detection signal 107
Control timing 1 to the tracking control means 8 so as to retry reading of the reproduction data 102 of the sector
08 to control the tracking control means 8. The tracking control means 8 outputs a tracking signal 109 to the optical pickup 2 based on the control signal 108 to control the optical pickup 2. This retry process is repeatedly executed until the reproduction data 102 is read out normally, and is executed until the memory unit 4 becomes empty or nearly empty.

[0004]

However, in the conventional disk reproducing apparatus, the retry processing is simply performed when a defective sector occurs, and the retry processing is increased especially in the case of a damaged disk or a large number of defective sectors. Then, the remaining amount of data in the memory means decreases,
There is a problem that discontinuous data transfer occurs in which discontinuous reproduced output data is transferred to the outside, and there is a problem that the probability of occurrence of the discontinuous data transfer is high.

For example, when a disk on which an audio signal is recorded is reproduced, if defective sectors or external vibrations occur continuously, the retry processing increases, and the probability that the data stored in the memory means is lost increases. Unpleasant sounds occur continuously or the sound is interrupted. Further, as a disk reproducing apparatus which does not perform a retry process for a defective sector for the second and subsequent times, one disclosed in Japanese Patent Application Laid-Open No. 8-77729 is generally known. This disk reproducing apparatus stores a defective sector and performs processing so as not to perform the retry processing again when reproducing the second and subsequent times, thereby reducing the number of retry processing, and reducing the data storage amount of the memory means due to an increase in retry processing. However, discontinuous data transfer due to the occurrence of a defective sector cannot be prevented, and this discontinuous data transfer causes an unpleasant sound or interruption of sound. In addition, the countermeasure against the recording of the defective sector requires the second or more reproduction.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a disk reproducing apparatus for preventing occurrence of discontinuous data transfer.

[0007]

The disk reproducing apparatus of the present invention monitors the data contents of the memory means and detects discontinuous data, and processes the discontinuous data so as to be continuous. Is provided with processing means for restoring. According to the present invention, it is possible to provide an excellent disc reproducing apparatus capable of preventing discontinuous data transfer from occurring.

[0008]

According to the first aspect of the present invention, data recorded on a disk is read out intermittently and stored in a memory means, and the data stored in the memory means is read at a speed higher than the read speed. In a disk reproducing apparatus that reads data at a low speed and outputs it as reproduced output data, when the data content of the memory means is monitored and discontinuous data is detected, the discontinuous data is processed so as to be continuous and the memory means is processed. If the frequency of scratches or skipping on the disk is high and cannot be prevented by retry processing, discontinuous data should be reproduced and output as highly continuous data. Therefore, the occurrence of discontinuous data transfer can be prevented, and the occurrence of unpleasant noise and interruption of sound can be prevented. It is not necessary to execute the retry processing more than necessary, and it is possible to prevent the data stored in the memory means from being drastically reduced by the retry processing a plurality of times.

According to a second aspect of the present invention, data recorded on a disk is read out intermittently and stored in a memory means, and the data stored in the memory means is read out at a speed lower than the above-mentioned reading speed. In the disk reproducing apparatus, the data is output as reproduction output data, and the data stored in the memory means and the corresponding data on the disk are checked for coincidence, and then the storage in the memory means is resumed. When a data inconsistency is detected at the time of resuming the storage of the data, a connection means for processing the data in the memory means and the disk so as to be continuous, storing the data in the memory means, and instructing the memory means to restart the storage is provided. It is a disc playback device that can smoothly connect data even if the quality of the data read from the disc is poor. Can be, writing becomes impossible memory means to the memory means by the data quality is poor can be prevented, such as discrete data transfers occur emptied.

According to a third aspect of the present invention, there is provided a disk reproducing apparatus for reproducing, using an optical pickup, a digital signal recorded on a track of a disk-shaped recording medium in a predetermined recording unit, wherein the optical pickup is provided. Reproduction means for reproducing the data output from the reproduction means, and memory means for intermittently writing the reproduction data obtained from the reproduction means and reading the reproduction data continuously at a predetermined transfer speed lower than the writing speed. Write address generation means for generating a write address of the memory means in accordance with a reproduction command; read address generation means for generating a read address of the memory means; and reproduction output data continuously read from the memory means as a reproduction output signal. A reproduction output means for outputting to the outside; and A tracking control means for causing on-track access to a desired track and an error for outputting an error detection signal for each of the predetermined recording units when monitoring reproduction data obtained by the reproduction means and detecting a read error of the reproduction data; Detecting means, a microprocessor for detecting a difference between the write address and the read address, and outputting the reproduction command when the difference is equal to or smaller than a predetermined comparison value, based on signals from the error detecting means and the memory means. Defect processing means for controlling the tracking control means so as to retry reading of data of the corresponding defective part of the disk in search of a defective part where the reproduction data is discontinuous, and monitoring data contents of the memory means When discontinuous data is detected, fade-in / The disk playback device is provided with data processing means for performing write-out processing and storing the data in the memory means. If the frequency of scratches or skipping on the disk is high and cannot be prevented by retry processing, discontinuous data is faded in. The data can be faded out and output to the memory means, and the data can be reproduced and output as highly continuous data in consideration of the data content.

According to a fourth aspect of the present invention, there is provided a disk reproducing apparatus for reproducing, using an optical pickup, a digital signal recorded on a track of a disk-shaped recording medium in a predetermined recording unit, wherein Reproducing means for reproducing the data output from the memory; memory means for intermittently writing the reproduced data obtained by the reproducing means and continuously reading out the reproduced data at a predetermined transfer rate lower than the writing speed; A reproduction output means for outputting reproduction output data continuously read from the means as a reproduction output signal to the outside, and confirming a match between the reproduction data written in the memory means and the corresponding reproduction data from the reproduction means. Then, a pattern matching means for activating storage of reproduction data from the reproduction means to the memory means, When the turn matching means detects a mismatch of the reproduced data, the reproduced data written in the memory means is faded out, and the reproduced data output from the reproducing means is faded in and combined with the fade coupling means for performing data coupling. It is a disc reproducing device provided, and even if the quality of the data read from the disc is poor, the data connection can be performed smoothly, and writing to the memory means becomes impossible due to the poor data quality. It can be prevented that the memory means becomes empty and discontinuous data transfer occurs.

According to a fifth aspect of the present invention, when discontinuous data is detected by monitoring data contents of the memory means instead of the data processing means, interpolation for replacing the discontinuous data with continuous data is executed. 4. The disk reproducing apparatus according to claim 3, further comprising a continuous data rewriting means for storing the data in the memory means, wherein if the frequency of scratches or skipping on the disk is high and cannot be prevented by retry processing, a series of data Can be reproduced and output while maintaining the continuity of data, so that the occurrence of discontinuous data transfer can be prevented, and the occurrence of unpleasant sounds and interruptions of sound can be prevented. It is not necessary to repeatedly execute the retry processing more than necessary, and it is possible to prevent the data stored in the memory means from being drastically reduced by the retry processing performed a plurality of times.

According to a sixth aspect of the present invention, the memory means is configured to store the data quality of the reproduced data read from the disk, and the data processing means is replaced with the data processing means.
4. The disc reproducing apparatus according to claim 3, further comprising: a skip processing means for judging reproduced data as a defect based on the data quality from the memory means, skipping a recording unit of the defective reproduced data and linking the data. Therefore, unnecessary retry processing can be reduced, and the occurrence of discontinuous data transfer can be reduced.

According to a seventh aspect of the present invention, there is provided a disk reproducing apparatus according to the third aspect, further comprising a memory adjustment learning unit for changing a retry processing start timing according to an error occurrence frequency, instead of the data processing unit. When the scratches and vibrations occur continuously, the start timing of the retry process can be changed so as to be advanced, and the storage capacity of the reproduction data in the memory means can be maintained in the FULL state. , The occurrence of discontinuous data transfer can be reduced.

Hereinafter, a disk reproducing apparatus according to the present invention will be described based on specific embodiments. (Embodiment 1) A disk reproducing apparatus according to Embodiment 1 of the present invention shown in FIG.
Data intermittently read out from the memory means 4
And read out the data stored in the memory means 4 at a speed lower than the above-mentioned read-out speed and output the reproduced output signal 1
A disc playback device that outputs the data as 06, monitors the data content of the memory means 4 and, when detecting discontinuous data, processes the discontinuous data so as to be continuous and stores it again in the memory means 4 The point that a data processing means 30 is provided as a means is different from the above-mentioned conventional example.

The data processing means 30 comprises a memory means 4
When the discontinuous data is detected by monitoring the data content of the discontinuous data, the data before and after the discontinuous data is faded in and faded out and stored in the memory means 4,
It is provided inside the microprocessor 10. Here, a description will be given of a disk reproducing operation of the disk reproducing apparatus.

When the disc 1 is inserted into the disc reproducing apparatus and the reproduction of the disc 1 is instructed, the tracking control means 8 causes the optical pickup 2 to be on-track on the track of the disc 1 and to be instructed. Access to the desired track. The reproducing means 3 reproduces the output 101 from the optical pickup 2 as reproduction data 102 and outputs it to the memory means 4. The reproduction data 102 obtained by the reproduction means 3 is intermittently written into the memory means 4, and is continuously read as reproduction output data 103 at a predetermined transfer speed lower than the writing speed of the reproduction data 102.

The write address generating means 5 generates a write address 104 of the memory means 4 according to a reproduction command 110 given from the microprocessor 10. The read address generator 6 generates a read address 105 of the memory 4. Microprocessor 10
Detects a difference between the write address 104 and the read address 105, and when the difference is equal to or smaller than a predetermined comparison value, the reproduction command 11
Outputs 0. Upon receiving the reproduction command 110, the reproduction output means 7 outputs the reproduction output data 103 continuously read from the memory means 4 as a reproduction output signal 106 to the outside.

The reproduction process is executed by repeating this series of operations. If there is a defective sector on the disk,
The error detecting means 9 detects a read error from the reproduced data 102 obtained by the reproducing means 3 and outputs an error detection signal 107 for each sector. Microprocessor 1
Upon receiving the error detection signal 107, the defect processing unit 20 inside the control unit 0 controls the tracking control unit 8 so as to retry reading data of a defective sector as a defective portion of the disk 1. For example, if the retry process is executed and the data of the defective sector can be normally read from the disk 1, the process directly proceeds to a normal read operation of reading the next data. If the data cannot be read, the read data is read. Then, the process shifts to the normal read operation.

When the frequency of scratches or skipping on the disk is high and cannot be prevented by the retry processing, that is, when the reproduction data 102 read from the disk 1 and stored in the memory means 4 by the retry processing is still discontinuous The data processing means 30 reads the reproduced data 1 read from the disk 1 by the retry processing and stored in the memory means 4.
When an instruction 303 indicating that the 02 is discontinuous is received from the defect processing unit 20, the discontinuity of the data content 301 of the memory unit 4 is confirmed, and the discontinuous data of the memory unit 4 is connected by performing a fade-in / fade-out process. Then, a forced reproduction process of outputting the processed data 302 to the memory means 4 is executed.

For example, during reproduction of a disk on which an audio signal is recorded, even if the first range of data (for example, n-th data) stored in the memory means 4 is retried due to a defective sector or vibration, etc. If the data is discontinuous and cannot be obtained, the data in the second range stored in the memory means 4 and reproduced immediately before the data in the first range (for example, n- data to be reproduced immediately before the n-th data) The volume of the (second, (n-1) th data) is gradually lowered in this reproduction order. Since the nth data cannot be obtained by the retry processing, it is deleted and the third data reproduced immediately after the data in the first range. (For example, n + 1-th, n + 2
N) is processed so as to gradually increase the volume of the (n-th data) in this reproduction order, and n + 1
The nth data and the (n + 2) th data are concatenated, and the processed data is stored again in the memory means 4.

The reproduction output means 7 outputs the processed data 302 of the memory means 4 to the outside as a reproduction output signal 106 when the read timing comes. With such a configuration, when the data content 301 of the memory means 4 is monitored and discontinuous data is detected, the discontinuous data of the memory means 4 is faded in and faded out, and the processed data 302 is stored in the memory means 4. Since the data can be re-stored and the discontinuous data can be reproduced and output as data having high continuity, the occurrence of discontinuous data transfer can be prevented, and the occurrence of unpleasant noise and interruption of sound can be prevented. It is unnecessary to execute the retry processing more than necessary, and it is possible to prevent the data stored in the memory unit 4 from being sharply reduced by the retry processing performed a plurality of times.

In the first embodiment, the retry process
The retry process may be performed a plurality of times if the amount of data stored in the memory unit 4 is sufficient, and the same effect as described above is obtained. (Embodiment 2) A disc reproducing apparatus according to a second embodiment of the present invention shown in FIG.
And pattern matching means 11 for activating storage of the reproduced data 102 from the reproducing means 3 to the memory means 4 when the coincidence between the reproduced data 102 and the corresponding reproduced data 102 from the reproducing means 3 is confirmed. Instead of the data processing means 30 of the first embodiment, when a data mismatch at the time of resuming storage in the memory means 4 is detected, the data in the memory means 4 and the disk 1 are processed so as to be continuous, and this memory means 4 and a fade connection means 40 as a connection means for instructing resumption of storage in the memory means 4.
Is different from the first embodiment.

When the pattern matching means 11 detects a mismatch of the reproduced data, the fade connecting means 40 fades out the reproduced data 102 written in the memory means 4 and reproduces the reproduced data 1 outputted from the reproducing means 3.
02 is connected to data by fading in and combining them. Here, a reproducing operation of the disk reproducing apparatus according to the second embodiment will be described.

The reproduction data 10 stored in the memory means 4
2 becomes FULL state, the reproduction means 3 is stopped for a certain period of time, and after waiting until the memory means 4 becomes empty, the pattern matching means 11 reads the reproduction data 102 stored in the memory means 4 and the reproduction data 102 After confirming the matching (pattern matching) with the reproduction data 102 from the reproduction means 3 corresponding to the above, the timing for starting the storage of the reproduction data 102 in the memory means 4 is taken.

However, the reproduction data 10 from the reproduction means 3
2 cannot perform pattern matching because of poor data quality, ie, the reproduction data 1
02 is detected, the fade connecting means 40
Performs fade-out processing of the reproduction data 102 written in the memory unit 4 as the combination source data based on the instruction 401 from the defect processing unit 20 and converts the reproduction data 102 output from the reproduction unit 3 as the combination destination data. Fade-in processing is performed, data is smoothly linked so as to combine them, and the data is stored in the memory means 4, and an instruction 402 for restarting storage in the memory means 4 is output.

With this configuration, in the conventional example, if the data quality of the reproduction data 102 from the reproduction means 3 is poor and pattern matching cannot be performed, the reproduction data 102 from the reproduction means 3 with good data quality is obtained. The retry process is repeatedly executed, and in the worst case, the pattern matching does not end normally, and the data accumulated in the memory means 4 becomes empty, causing discontinuous data transfer, causing unpleasant sound or sound interruption. In the second embodiment, there is a problem that
1 cannot be used, that is, when the data quality of the reproduced data 102 from the reproducing means 3 is poor and pattern matching cannot be performed, the mismatch of the reproduced data 102 in the pattern matching means 11 is detected and the combining source data is determined. Fade-out processing, fade-in processing of connection destination data, combination of these and data connection are performed, the data after this connection is stored in the memory means 4, and storage in the memory means 4 can be resumed, resulting in poor data quality. However, the data connection can be performed smoothly, and the problem as in the above-described conventional example can be solved.

(Embodiment 3) A disc reproducing apparatus according to Embodiment 3 of the present invention shown in FIG. 3 monitors data contents 501 of memory means 4 in place of data processing means 30 of Embodiment 1 described above. The first embodiment differs from the first embodiment in that, when discontinuous data is detected, the continuous data rewriting means 50 for executing interpolation for replacing the discontinuous data with continuous data and storing the result in the memory means 4 is provided. . The continuous data rewriting means 50 is provided inside the microprocessor 10.

Here, the reproducing operation of the disk reproducing apparatus according to the third embodiment will be described. If the frequency of scratches or skipping on the disk is high and cannot be prevented by the retry processing, that is, if the reproduction data 102 read from the disk 1 and stored in the memory means 4 is still discontinuous by the retry processing, continuous data rewriting is performed. The means 50 reads the data from the disk 1 by the retry processing and
Indicating that the reproduction data 102 to be stored in the
When receiving the data 03 from the defect processing unit 20, the discontinuity of the data content 501 of the memory means 4 is confirmed, and the forced reproduction processing of replacing the discontinuous data of the memory means 4 with the continuous data 502 by linear interpolation is executed. .

For example, when the n-th data to be stored in the memory means 4 during reproduction of the disk on which the audio signal is recorded cannot be obtained even by the retry processing due to a defective sector or vibration, and becomes discontinuous. , Memory means 4
And the (n−1) th data reproduced immediately before the nth data, and the (n +) th data reproduced immediately after the nth data.
The n-th data is calculated and obtained based on the first data, and the obtained data is interpolated as the n-th data and recorded in the memory means 4. The data before and after the discontinuous data may be plural.

With such a configuration, when the data content 501 of the memory means 4 is monitored and discontinuous data is detected, the discontinuous data of the memory means 4 is interpolated into continuous data based on data before and after the discontinuous data. Then, the interpolated data 502 is recorded in the memory means 4 and can be reproduced and output while maintaining the continuity of a series of data. Therefore, the occurrence of discontinuous data transfer can be prevented, and the occurrence of unpleasant sound and interruption of sound can be prevented. Can be prevented. It is not necessary to repeatedly execute the retry processing more than necessary, and it is possible to prevent the data stored in the memory means 4 from being sharply reduced by the retry processing performed a plurality of times.

(Embodiment 4) In the disk reproducing apparatus according to Embodiment 4 of the present invention shown in FIG. 4, the memory means 4 is configured to store the data quality 601 of the reproduced data 102 read from the disk 1. Then, instead of the data processing means 30 of the first embodiment, the reproduction data 102 as a defect is determined based on the data quality 601 from the memory means 4, and the recording unit of the reproduction data 102 as the defect is skipped. This embodiment is different from the first embodiment in that a skip processing means 60 for connecting data is provided.

Here, a reproducing operation of the disk reproducing apparatus according to the fourth embodiment will be described. In the memory means 4,
As in the first embodiment, the reproduction data 102 read from the disk 1 and reproduced by the reproduction means 3 is written, and further, the data quality 601 on the disk is written. The data quality on the disk refers to data relating to the reproduction state of the disk 1. The disk 1 includes error correction information. The reproduction unit 3 performs error correction. Is the data that indicates

The skip processing means 60 reads the data quality 601 on the disk from the memory means 4, learns the read data quality 601 and skips a sector having a poor data quality 601 as a defective sector at the time of data connection. Due to such a configuration, a portion skipped as a defective sector becomes discontinuous data and may cause an unpleasant sound. However, discontinuous data is generated only once in the same defective sector and is generated continuously. Can be prevented, and the occurrence of discontinuous data transfer can be reduced. Since defective sectors can be skipped in the first reproduction and unnecessary retry processing can be reduced, it is possible to reduce the amount of data stored in the memory means 4 by executing retry processing a plurality of times. Can be prevented.

In the fourth embodiment, a skip processing means 60 is used instead of the data processing means 30 of the first embodiment.
However, in the case where the skip processing means 60 is added to the disc reproducing apparatus according to the first to third embodiments, discontinuous data generated by skipping defective sectors is continuously recorded. Data can be processed, and unpleasant noise and interruption of sound due to discontinuous data transfer can be prevented.

(Embodiment 5) A disc reproducing apparatus according to a fifth embodiment of the present invention shown in FIG. 5 performs a retry process in accordance with an error occurrence frequency in place of the data processing means 30 of the first embodiment. The difference from the first embodiment is that a memory adjustment learning means 70 for changing the start timing is provided.

Here, the reproducing operation of the disk reproducing apparatus according to the fifth embodiment will be described. If the scratches and vibrations occur continuously, the error occurrence frequency increases, and the memory adjustment learning unit 70 advances the start timing of the reproduction retry process according to the error occurrence frequency. That is, the control timing 108 to the tracking control means 8 is changed.

With such a configuration, the start timing of the retry processing can be changed so as to advance the start timing of the retry process when the scratches and vibrations occur continuously, and the storage capacity of the reproduction data 102 in the memory means 4 is maintained in the FULL state. And the occurrence of discontinuous data transfer can be reduced.

[0039]

As described above, according to the disk reproducing apparatus of the present invention, when the data content of the memory means is monitored and discontinuous data is detected, the discontinuous data is processed to be continuous. By providing the processing means for re-storing in the memory means, when the frequency of scratches or skipping on the disk is high and cannot be prevented by the retry processing, discontinuous data can be reproduced and output as highly continuous data,
The occurrence of discontinuous data transfer can be prevented, and the occurrence of unpleasant sounds and interruptions in sound can be prevented. It is not necessary to execute the retry processing more than necessary, and it is possible to prevent the data stored in the memory means from being drastically reduced by the retry processing a plurality of times.

When the processing means monitors the data content of the memory means and detects discontinuous data, the processing means fades in and fades out before and after the discontinuous data and stores the data in the memory means. In this case, the discontinuous data can be fade-in / fade-out processed and output to the memory means, and can be reproduced and output as highly continuous data in consideration of data contents.

When the discontinuity data is detected by monitoring the data content of the memory means instead of the data processing means, interpolation for replacing the discontinuous data with the continuous data is executed and stored in the memory means. In the case where the continuous data rewriting means is provided, a series of data can be reproduced and output while maintaining the continuity of the data, so that the occurrence of discontinuous data transfer can be prevented, and the occurrence of unpleasant sound and interruption of sound can be prevented. It is not necessary to repeatedly execute the retry processing more than necessary, and it is possible to prevent the data stored in the memory means from being drastically reduced by the retry processing performed a plurality of times.

Also, in the disk reproducing apparatus for recognizing the coincidence between the data stored in the memory means and the data of the disk corresponding to the data, and then resuming the storage in the memory means, the resuming of the storage in the memory means may be performed. A disc reproducing apparatus provided with connecting means for processing data in the memory means and the disc so as to be continuous and storing the data in the memory means and instructing resumption of storage in the memory means upon detecting a data mismatch at the time; In the case of, even if the quality of the data read from the disk is poor, data connection can be performed smoothly, and writing to the memory means becomes impossible due to the poor data quality, and this memory means becomes empty. The occurrence of discontinuous data transfer can be prevented.

Also, the memory means is configured to store the data quality of the reproduced data read from the disk, and the data processing means is replaced with a defect based on the data quality from the memory means. In the case of a disc reproducing apparatus provided with a skip processing means for judging data and skipping a recording unit of reproduced data having the defect and linking the data, unnecessary retry processing is reduced and the occurrence of discontinuous data transfer is reduced. be able to.

In the disk reproducing apparatus provided with a memory adjustment learning means for changing the start timing of the retry processing in accordance with the frequency of occurrence of an error in place of the data processing means, the disk reproducing apparatus may be used in a case where a scratch or vibration continuously occurs. The start timing of the retry process can be changed so as to be advanced, the storage capacity of the reproduced data in the memory means can be maintained in the FULL state, and the occurrence of discontinuous data transfer can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a disc reproducing apparatus according to a first embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration of a disc reproducing apparatus according to a second embodiment of the present invention;

FIG. 3 is a block diagram illustrating a configuration of a disc reproducing apparatus according to a third embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration of a disc reproducing apparatus according to a fourth embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration of a disk reproducing apparatus according to a fifth embodiment of the present invention.

FIG. 6 is a block diagram showing a configuration of a conventional disk reproducing apparatus.

[Explanation of symbols]

 Reference Signs List 30 data processing means 40 fade connection means 50 continuous data rewriting means 60 skip processing means 70 memory adjustment learning means

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasushi Toyoda 1006 Kazuma Kadoma, Kadoma-shi, Osaka Matsushita Electric Industrial Co., Ltd. F-term (reference) 5D044 BC03 CC04 DE38 DE68 FG10 FG16 GK10 GK11 HH05

Claims (7)

[Claims] 1. A disk reproducing apparatus for intermittently reading data recorded on a disk, storing the data in a memory means, reading the data stored in the memory means at a speed lower than the read speed, and outputting the data as reproduced output data. 2. A disc reproducing apparatus according to claim 1, further comprising a processing means for monitoring the data content of said memory means and detecting discontinuous data, processing said discontinuous data to be continuous, and re-storing said discontinuous data in said memory means. 2. The method according to claim 1, wherein the data recorded on the disk is read out intermittently and stored in a memory means. The data stored in the memory means is read out at a speed lower than the read speed and output as reproduced output data. A disc reproducing apparatus for recognizing a match between the data stored in the means and the data on the disc corresponding to the disc, and then restarting the storage in the memory means. A disc reproducing apparatus provided with a linking means for processing the data in the memory means and the disk so as to be continuous when detected, storing the data in the memory means, and instructing the memory means to resume the storage; 3. A disk reproducing apparatus for reproducing, using an optical pickup, a digital signal recorded on a track of a disk-shaped recording medium in a predetermined recording unit, comprising: reproducing means for reproducing data output from the optical pickup. Memory means for intermittently writing reproduction data obtained from the reproduction means and reading the reproduction data continuously at a predetermined transfer speed lower than the writing speed; and changing the write address of the memory means in accordance with a reproduction instruction given. Write address generation means for generating; read address generation means for generating a read address of the memory means; reproduction output means for outputting reproduction output data continuously read from the memory means as a reproduction output signal to the outside; Place an optical pickup on-track on the track and place A tracking control unit for accessing the track, an error detection unit for monitoring the reproduction data obtained by the reproduction unit and outputting an error detection signal for each of the predetermined recording units when detecting a read error of the reproduction data; A microprocessor that detects a difference between the address and the read address and outputs the reproduction command when the difference is equal to or less than a predetermined comparison value; and a discontinuity of the reproduction data based on a signal from the error detection unit and the memory unit. Defect processing means for controlling the tracking control means so as to retry reading of data of the corresponding defective part of the disk in order to find a defective part, and when discontinuous data is detected by monitoring data content of the memory means, Fade in before and after this discontinuous data,
A disk reproducing apparatus provided with data processing means for performing fade-out processing and storing the data in the memory means. 4. A disk reproducing apparatus for reproducing, using an optical pickup, a digital signal recorded on a track of a disk-shaped recording medium in a predetermined recording unit, comprising: reproducing means for reproducing data output from the optical pickup. Memory means for intermittently writing reproduction data obtained from the reproduction means and reading the reproduction data continuously at a predetermined transfer speed lower than the writing speed; reproduction output data continuously read from the memory means A reproduction output means for outputting the reproduction data to the outside as a reproduction output signal, and when it is confirmed that the reproduction data written in the memory means matches the reproduction data corresponding to the reproduction data from the reproduction means, the reproduction means outputs the reproduction data to the memory means. Pattern matching means for activating storage of reproduction data; and reproduction by the pattern matching means. A disc connecting means for fading out the reproduced data written in the memory means and fading in and combining the reproduced data outputted from the reproducing means when the data mismatch is detected. apparatus. 5. When the discontinuous data is detected by monitoring the data content of the memory means instead of the data processing means, interpolation for replacing the discontinuous data with the continuous data is executed to store the continuous data in the memory means. 4. The disc reproducing apparatus according to claim 3, further comprising rewriting means. 6. The memory means is configured to store the data quality of reproduced data read from a disk, and in place of the data processing means, reproduced data which is determined to be defective based on the data quality from the memory means. 4. The disc reproducing apparatus according to claim 3, further comprising skip processing means for judging and skipping the recording unit of the reproduced data having the defect and linking the data. 7. The disk reproducing apparatus according to claim 3, further comprising a memory adjustment learning means for changing a start timing of the retry processing according to an error occurrence frequency, instead of the data processing means.