JP2002015529A - Optical disk device and data processing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that conventionally speed-up of reproduction of data from the optical disk of the conventional optical disk device cannot be realized, because sectors may end up dropping out, so that retry processing for them is needed. SOLUTION: The optical disk device is provided with a sector address storage means for storing the sector address of data of each sector unit inputted from an optical disk, a first data processing means having an error flag storage mans for storing an error flag showing that inputted data are not consecutive, when the sector address of the sector address storage means and the sector address of the data of each sector unit inputted before the above inputted data are not consecutive, and a second data processing means to check whether the data are consecutive per sector unit by referring to the error flag of the error flag storage means of the first data processing means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an optical disk apparatus for reproducing data from an optical disk and a data processing method for processing data reproduced from the optical disk.

[0002]

2. Description of the Related Art Today, as a device for recording data on an optical disk and reproducing the data from the optical disk, for example, there are a CD-ROM and a DVD-ROM.

[0003] On these optical disks, data is recorded in sector units. Sectors are generally synchronizing signals,
ID signal (these are called header information), user data, and ECC (Error Collection Code)
Consists of Therefore, when data is reproduced by an optical disk device, light from a semiconductor laser is focused on a minute spot and irradiated on an optical disk, thereby detecting header information of a sector recorded on the optical disk. .

When the header information is detected by an interface processor that processes data exchange between the optical disk device and an external device (for example, a host PC), a microcontroller that controls the entire optical disk device from the interface processor. An interrupt for informing the processor (firmware) of the detection of the header information of the sector is generated, and the microprocessor performs control processing based on the sector information.

This control process is performed every time the sector is detected, and checks the reliability of the data in the detected sector and checks the continuity between the currently detected sector and the previously detected sector. Are performed.

In recent years, optical discs have been required to speed up the reproduction of data from the optical disc. If the data is reproduced at a high speed, the interval time of the sector detection interrupt generated for each sector is shortened.

For this reason, the speed can be increased only to a certain extent. This is because if the interval at which the sector detection interrupt occurs becomes too short, the interrupt processing including the sector detection interrupt and the interrupt disabled section processing according to the instruction set of the optical disk apparatus itself will not be completed within the interval. A detection interrupt is generated, thereby skipping sector processing. For this reason, it is not possible to confirm the reliability of the data of the skipped sector, so that it is necessary to perform the read process (retry) again on the skipped sector. There was a problem. Then, in the retry, let the skipped sector seek the PUH (pickup head) again,
It is necessary to perform the operation of reading the data again by performing tracking, and this is a process that requires a very long processing time, and thus causes a problem that the high-speed reading capability of the optical disk device is reduced.

There is also a technique in which a sector detection interrupt is generated only once in four times in order to extend the interval between generation of sector detection interrupts. In this case, during the period in which the interrupt occurs, the data of the detected sector is not detected. Since the microprocessor performs all processes such as the reliability check and the continuity check with the sector, there is a problem that a processing time is eventually required. In addition, the problem is that even if an expensive object that can only process the microprocessor at high speed can be used, other processes cannot follow up, so that the entire optical disk device needs to be configured with components that can process at high speed.
In order to control all of them, a new problem arises that a faster microprocessor is required.

[0009]

In the conventional optical disk apparatus, if an attempt is made to speed up the reproduction of data from the optical disk, the interval time between sector detection interrupts generated for each sector is shortened. It becomes necessary to retry the sector that skipped processing,
There was a problem that the speed could not be increased.

Also, in the technique of generating a sector detection interrupt only once in four times, there is a problem that the processing speed of the microprocessor in the optical disk device takes a long time, so that the speed cannot be increased.

An object of the present invention is to solve the above-mentioned problems and to increase the processing time of the microprocessor without increasing the processing time.
An object of the present invention is to provide an optical disk apparatus and a data processing method capable of increasing the speed of reproducing data from an optical disk.

[0012]

In order to achieve the above object, in an optical disk apparatus according to the present invention, a sector address storage means for storing a sector address of data in sector units input from an optical disk, and the sector address To store an error flag indicating that these data are not continuous when the sector address of the storage means is not continuous with the sector address of the data in sector units input before the input data. A first data processing unit having an error flag storage unit, and checking whether the data is continuous in sector units.
A second data processing means for performing the processing by referring to an error flag in the error flag storage means of the first data processing means.

Further, in the optical disk apparatus of the present invention, a sector address storage means for storing a sector address of sector-by-sector data input from the optical disk, a sector address of the sector address storage means, Error flag storage means for storing an error flag indicating that these data are not continuous when the sector address of the data of the sector unit inputted before is not continuous, and timing of sending an interrupt instruction Counting means for determining
The data processing unit and the error flag storage unit of the first data processing unit, which checks whether or not the data to be performed in response to an interrupt instruction from the first data processing unit is continuous in sector units. And a second data processing unit that performs the processing by referring to the error flag described above.

Further, in the optical disk apparatus of the present invention, a sector address storage means for storing a sector address of sector-based data input from the optical disk, a sector address of the sector address storage means, and the input data Error sector storage means for storing an error flag indicating that these data are not continuous when the sector address of the sector-based data input before is not continuous, A counting means for counting down each time the data is input, and a first means for sending an interrupt instruction when the value of the counting means becomes 0 or when an error occurs in the data.
The error flag storage means of the first data processing means checks whether or not the data is continuous in sector units in response to an interrupt instruction from the first data processing means. And a second data processing unit that performs the processing by referring to the error flag.

In the optical disk apparatus according to the present invention, the counting means for counting down each time data in sector units is input from the optical disk and the error state of the data in each sector unit during the period counted by the counting means are shown. A first error information storage unit for storing error information, and a second error information storage unit that stores the storage content of the first error information storage unit and that can be referred to from the second data processing unit A first data processing unit having the first data processing unit and the second data processing unit.
And a second data processing means for correcting an error of the data in each sector unit based on the storage contents of the error information storage means.

Further, in the data processing method of the present invention, a step of storing a sector address for storing a sector address of data in sector units input from the optical disc, and a step of storing the sector address When the address and the sector address of the data in sector units input before the input data are not continuous, an error flag for storing an error flag indicating that these data are not continuous is set. A first data processing step having a storage step; and checking whether or not the data is continuous in sector units, by checking an error flag stored in the error flag storage step of the first data processing step. And a second data processing step performed by reference.

In the data processing method according to the present invention, a step of storing a sector address for storing a sector address of data in a unit of sector input from the optical disk, and a step of storing the sector address When the address and the sector address of the data in sector units input before the input data are not continuous, an error flag for storing an error flag indicating that these data are not continuous is set. A first step having a step of storing and a step of counting for determining a timing of sending an interrupt instruction.
The error flag of the first data processing step is checked for whether or not the data to be performed in response to an interrupt instruction from the first data processing step is continuous in sector units. And a second data processing step performed by referring to the error flag stored in the step (a).

Further, in the data processing method of the present invention, a step of storing a sector address for storing a sector address of data in a unit of sector input from the optical disc, and a step of storing the sector address When the address and the sector address of the data in sector units input before the input data are not continuous, an error flag for storing an error flag indicating that these data are not continuous is set. A step of storing and a step of counting down the value of the counter every time the data in the sector unit is inputted, and the value of the counter becomes 0 or an error occurs in the data by the step of counting down. In this case, a first data processing step of sending an interrupt instruction and the first data processing step Checking whether or not the data performed in response to the interrupt instruction from the processing step is continuous in sector units refers to the error flag stored in the step of storing the error flag in the first data processing step. And a second data processing to be performed.

Further, according to the data processing method of the present invention, each time sector-based data is input from the optical disc, the counter value is down-counted, and the error of each sector-based data during the period counted in this step is counted. A step of storing first error information for storing error information indicating a state, and storing the storage content stored in the first error information storage step,
A first data processing step having a step of storing second error information that can be referred to from the second data processing means; and a step of storing the second error information of the first data processing step. Based on the memory content of
A second data processing step of correcting an error of the data in each sector unit.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) FIG. 1 is a block diagram showing an optical disk device according to a first embodiment of the present invention. In FIG. 1, the optical disk drive
Only the main components required to read (reproduce) and transfer 100 data are shown.

The data recorded on the optical disk 1 rotated by the spindle motor 90 is stored in a pickup head (P
UH) 91. This data is recorded in sector units, and is reproduced continuously. In addition,
Each sector includes a synchronization signal for synchronizing data in the optical disc drive 100, and an optical disc 1 of the sector.
ID (IDentify) indicating the above location information and the type of the sector (lead-in information, user area information, etc.)
(Definition) Signals (referred to as header information) and user data, and ECC (Error Collection Code) for correcting errors in these header information and user data
(Error correction code). The data read by the pickup head 91 is a DSP (Digital Signal Process
r) At 92 (digital signal processing device), for example, demodulation (D
In the case of VD, 16-bit data is converted into 8-bit data).

The processed data is exchanged with the host PC 50 for giving instructions such as reading to the optical disk drive 100.
Transferred to 10.

The buffer memory 12 is for buffering a predetermined unit of data to be sent to the host PC 50 under the control of the interface processor 10. This is, for example, in the case of audio information, since it is sufficient to reproduce at a speed of 75 sectors per second, the transfer speed of data reproduced from the optical disc 1 and the transfer speed of data requested by the Host PC 50 are: Since the transfer speed of the data reproduced from the optical disk 1 is higher, the data from the optical disk 1 is stored in the buffer memory 12, and this is sequentially stored.
Send to Host PC50.

The interface processor 10
Controls storage and reading of data to and from the buffer memory 12. Specifically, it is for converting an instruction from the Host PC 50 into an instruction set provided in the optical disk drive 100, or for giving a control interrupt instruction to a control device (microprocessor) 15 for controlling the entire optical disk drive 100. is there.

The host PC 50 issues a read command to the optical disk drive 100,
To receive data from

The microprocessor 15 controls the entire optical disk drive 100 such as the PUH 91 in addition to the interface processor 10 and the DSP 92. When the microprocessor 15 receives a sector detection interrupt issued from the interface processor 10 when it is determined that the interface processor 10 has received the sector unit information, the microprocessor 15 acquires the address of the sector at this time. Do.

The interface processor 10 of the present embodiment is provided with a previous sector address register 17 and an error flag memory 18.

The previous sector address register 17 is a register for storing the sector address at the time when the previous sector detection interrupt from the interface processor 10 to the microprocessor 15 was issued.

By the preceding sector address register 17,
The address can be compared with the sector address at the time when the current sector detection interrupt is issued, thereby making it possible to confirm the continuity (whether or not a sector is missing) of whether or not addresses are continuous. Become.

The error flag memory 18 is a memory for storing an error state. For example, the error flag memory 18 stores information on what number of sectors is not continuous (how many sectors are missing). It is stored by a sector address. The error flag memory 18 can be directly referred to by the microprocessor 15, and the microprocessor 15 can determine the presence or absence of an error only by checking the contents of the error flag memory 18.

Next, the operation of the optical disk drive 100 of FIG. 1 will be described with reference to the flowchart of FIG. In FIG. 2, the processing in the interface processor 10 and the processing in the microprocessor 15 are separately illustrated.

As processing in the interface processor 10, a sector is detected from the header information obtained via the PUH 91 and the DSP 92 (step S1). Here, when the address data of the detected sector is obtained from the header information (step S2), the address of the previously detected sector stored in the previous sector address register 17 of the interface processor 10 is loaded into the interface processor 10. (Step S3). Interface processor 10
Then, it is determined whether or not the previous sector address and the current sector address have continuity (that is, whether or not the previous sector address and the current sector address are sequentially connected), and the continuity is determined. If the addresses are in order, the process proceeds to step S6 described below.

In step S4, if there is no continuity (that is, if the sector addresses are not connected sequentially and there is a skip in the sector), there is an error in the continuity, and the continuity error flag is set. And store this in the error flag memory 18 (step
S5).

Then, in order to check whether or not the sector address of the next sector is continuous, the address data of the sector detected this time is stored in the previous sector address register 17 (step S6), and then the microprocessor 15 is sent to the microprocessor 15. Then, a sector detection interrupt instruction is generated (step S7).

Thereafter, the processing is performed by the microprocessor 15.

When the microprocessor 15 receives a sector detection interrupt instruction from the interface processor 10 (step S8), according to the present invention, since the continuity error has been checked by the interface processor 10, the microprocessor 15 The error flag memory 18 of the processor 10 is checked, and it is checked whether a continuity error flag is set here (step S9). Here, if it is determined that the error flag is not set, it is known that the continuity of the sector is secured, so that the operation of the microprocessor 15 ends normally (step S10), and the next continuity check is performed. And other processing becomes possible. Also, check the error flag memory 18 of the interface processor 10 (step S
9) If the error flag of the continuity error is set, it is known that the sector is missing. To read the missing sector from the optical disc 1 again,
Instruct retry operation to PUH91, DSP92, etc. (step S1
1).

According to this embodiment, conventionally, in order to check whether or not the sector addresses of the sectors are consecutive, it is necessary to obtain the previous sector address and the current sector address from the interface processor 10. ,
It was necessary to issue an inquiry command and perform calculations and processing to check the continuity between the previous sector address and the current sector address.
Since the error check can be performed only by checking the contents of the error flag memory 18 of the interface processor 10, the load on the microprocessor 15 can be reduced, thereby enabling high-speed reproduction of data from the optical disk.

In the above embodiment, the case where the continuity of the addresses of two sectors is checked has been described. However, only when a continuity error occurs, the generation of a sector detection interrupt from the interface processor 10 to the microprocessor 15 is instructed. By doing so, it is possible to suppress the occurrence of a sector detection interrupt from the interface processor 10 to the microprocessor 15 until a continuity error occurs, thereby reducing the processing time of the microprocessor 15 and increasing the optical disc Faster data playback from 1 is possible. (Second Embodiment) FIG. 3 is a block diagram of an optical disk device according to a second embodiment of the present invention. In addition,
The same components as those in FIG. 1 are denoted by the same reference numerals and description thereof will be omitted.

FIG. 3 differs from FIG. 1 in that the interface processor 20 has a sector counter 25 and the microprocessor 27 has a thinning-out register 29.

The thinning-out register 29 of the microprocessor 27 is used to determine the timing of sending an interrupt instruction from the interface processor 20 to the microprocessor 27, for example, based on a data transfer length set externally such as the Host PC 50. Specifically, the number of sectors from which the interrupt instruction is transmitted from the interface processor 20 is stored. Then, the sector counter 25 of the interface processor 20 stores the value of the thinning-out register 29, and uses this value for processing in the interface processor 20.

First, the operation of the interface processor 20 in the optical disk drive 120 of FIG.
This will be described with reference to the flowchart of FIG. 4 and the timing chart of FIG.

4 and 5, a case will be described in which the thinning-out number register 29 of the microprocessor 27 sends an interrupt instruction in advance every n sectors, that is, it is set to thin out n sectors.

Steps S1 to S3 are the same as those in FIG. 2, but load the address of the previously detected sector stored in the previous sector address register 17 of the interface processor 20 into the interface processor 20 (step S3). ), The address data of the sector detected this time is saved in the previous sector address register 17 (step S24). Then, the interface processor 20 determines whether or not there is continuity between the address data of the previously detected sector loaded in step S3 and the address data of the currently detected sector (that is, whether the address data of the previous sector is To determine whether the addresses of the current sector are sequentially connected) (step
S25) If there is continuity, the data is arranged after the user data of each sector in order to determine whether there is a problem in the reliability of the data of the sector detected this time.
EDC (Error Detection Code) and E
By referring to the CC (Error Collection Code), it is checked whether or not an error has occurred in the user data, and if an error has occurred, in which part the error has occurred (step S26). If it is determined that the data of each sector is normal without any problem in reliability, the value of the sector counter 25 is decremented (decreased) by one (step S27). That is, here, n-1 is executed, and this value is stored in the sector counter 25 again.

Then, it is checked whether or not the value of the sector counter 25 has reached 0, that is, whether or not it has reached the preset decimation number n of the sector (step S28). An interrupt is generated (step S29).

On the other hand, if the address of the previous sector and the address of the current sector are not continuous in step S25, that is, if there is a missing sector, an error flag indicating that there is a missing sector is set (step S25). S3
0). In addition, although the sectors are continuous, step S26
If it is determined that there is a problem in the reliability of the data of the sector detected this time, an error flag is set to indicate that there is a problem in the reliability of the data of the sector, and these errors are stored in the error flag memory 28. The error flag is stored (Step S30). When an error has occurred, it is necessary to perform a retry operation or the like by the microprocessor 27 as described in the first embodiment. Therefore, a sector detection interrupt is generated for the microprocessor 27 (step S29).

If the value of the sector counter 25 is not 0 in step S28, not all data to be transferred to the Host PC 50 has been transferred to the Host PC 50.
Returning to step S1, the process is repeated.

FIG. 5 is a timing chart showing the generation timing of the sector detection interrupt of the interface processor 20 of the second embodiment.

FIG. 5 (a) shows the flow of time, and FIG. 5 (b) shows the state of formation of data on the optical disc 1 at the time of reproduction. And figure
5 (c) is the generation timing of the sector detection interrupt when an error occurs, and if there is no error, as shown in FIG. 5 (d),
Sector detection interrupts are generated by detecting the number n of the set number of sectors to be thinned out, and a sector detection interrupt is generated. Generates a detection interrupt instruction.

Next, the processing of the microprocessor 27 of the second embodiment will be described with reference to FIG.

First, the optical disk drive 1 from the host PC 50
When a read command (command for reproducing the data of the optical disc 1) is received from the interface processor 20 via the interface processor 20 (step S61), the number of read sectors (for example, n sectors) specified by the read command is used for a thinning number. Register 2
9 (step S62). In this embodiment, the continuity check of the sector and various errors are processed by the interface processor 20.
Since it is necessary to know the number of sectors to be thinned out by 20,
The number of sectors is set in the sector counter 25 of the interface processor 20 (step S63). In the interface processor 20, as described in FIG.
When the sector is set, the steps from step S1 are sequentially executed. This allows the interface processor
Transfer of data from 20 to Host PC 50 is started (step S64). Therefore, in step S29 of FIG. 4, when receiving a sector detection interrupt from the interface processor 20 to the microprocessor 27 (step S65), the microprocessor 27
It is checked whether the value of the sector counter 25 is 0 (whether or not the number of sectors specified in advance has reached n) (step S6).
6) If the value of the sector counter is 0, it is determined that the reading of the data requested by the Host PC 50 has all been completed, and the data transfer ends (step S67).

In step S66, if the value of the sector counter 25 of the interface processor 20 is not 0, it is expected that some error has occurred during the data transfer to the host PC 50. Since the value of the sector counter 25 is the number of sectors that have not been read yet, this is stored in the thinning-out register 29 of the microprocessor 27 (step S28). Then, the error flag in the error flag memory 28 of the interface processor 20 is checked,
Thereby, the error content (whether the error is a continuity error or an error due to the reliability of the sector) is determined (step S6).
9). As a result, it is determined that the error requires retry processing (step S70). If the error is a continuity error, the sector in which the error has occurred is set as a seek target address in order to reproduce the missing sector from the optical disc 1 again ( In step S71, a seek operation process for moving the PUH 91 to a target address is performed (step S73).

If it is determined in step S70 that the error does not require a retry process, the error correction process can cope with the error. Therefore, an error correction process using ECC is performed (step S72).

When the above processing is completed, the number of sectors that have not been read yet is stored in the thinning-out register 29 in step S68, and this is set again in the sector counter 25 of the interface processor 20 (step S6).
3).

Then, when a series of these processes proceeds and it is determined in step S66 that the value of the sector counter 25 of the interface processor 20 is 0, it is determined that reading of the data requested by the Host PC 50 has been completed, and The transfer ends (step S67).

According to the above embodiment, by setting the number of transfer sectors of the read command from the Host PC to the decimation factor setting of the interface processor, the microprocessor is released from the data check processing unless an error occurs. Thus, it is possible to greatly speed up the reproduction performance of the optical disk.

In the above embodiment, the case where the thinning-out register 29 is provided has been described. However, a fixed value may be set in the sector counter 25 in advance. It does not have to be particularly provided. (Third Embodiment) FIG. 7 is a block diagram showing an optical disk device according to a third embodiment of the present invention. In addition,
The same components as those in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted.

FIG. 7 differs from FIG. 3 in that an internal error register 32 and an external error register 33 are provided.

The internal error register 32 and the external error register 33 are used to store an error state during a sector detection interrupt instruction from the interface processor 30 to the microprocessor 37 set by the sector counter 35. These include, for example, a continuity error between sectors, or in the case of EDC, a flag indicating in which sector the error has occurred must be stored. deep.

The difference is that the internal error register 32 is a register that can be accessed only by the interface processor 30, whereas the external error register 33 is a register that the microprocessor 37 refers to.

Next, referring to the flowchart of FIG.
In particular, the operation of the interface processor 30 of the optical disk drive 130 will be described. In the present embodiment, a case will be described in which the sector counter is set to 2 in advance (that is, the sector detection interrupt is once for every two sectors).

The host PC 50 instructs to reproduce the data of the optical disk 1, and based on the instruction, the interface processor 30 detects one of the sectors to be sequentially reproduced (step S81). For the detected sector,
Various errors (continuity, reliability, etc.) are checked (step S82). When it is determined that no error has occurred (step S83), the sector counter is decremented (step S85). Then, the process is repeated until the sector counter becomes 0 (step S85).

When it is detected in step S83 that an error has occurred, the value of the internal error register 32 is updated in accordance with various types of error information. Specifically, it stores what error has occurred in which sector. If any one of the errors occurs in the period until the sector counter becomes 0, retry processing or the like is required in the period, so that the OR of the error information in the period is performed.

Then, in step S85, the sector counter 35
Becomes zero, the values corresponding to all the errors during the period are stored in the internal error register 32, and are stored in the external error register which can be referred to by the microprocessor 37.
Copy it to 33 (step S87). As a result, the value of the internal error register 32 becomes unnecessary and thus is cleared (step S88), and the sector counter is set in steps S84 and S85.
Since the value of 35 is 0, it is set to 2 (fixed thinning number = 1) again (step S89), and a sector detection interrupt is generated to the microprocessor 37 (step S90).

Next, the processing of the microprocessor 37 in the third embodiment will be described with reference to FIG.

First, the optical disk drive 1 from the host PC 50
When a read command (command for reproducing data of the optical disc 1) is received from the interface processor 30 via the interface processor 30 (step S61), the interface processor 30
Then, as described in FIG. 8, the steps from step S81 are sequentially executed. Thus, the transfer of data from the interface processor 30 to the Host PC 50 is started (Step S64). Therefore, when the interface processor 30 generates a sector detection interrupt to the microprocessor 37 in step S90 of FIG. 8, the microprocessor 37 receives the interrupt (step S65). As a result, the error flag in the external register 33 of the interface processor 30 is checked, thereby checking whether or not there is an error within a predetermined number of sectors (two sectors in this embodiment) (step S69). As a result, if it is determined that the error requires the retry process (step S70), a predetermined number of sectors (two sectors) are reproduced from the optical disc 1 again.
Set the sector before the sector as the seek target address (step
(S91), a seek operation process for moving the PUH 91 to a target address is performed (step S73).

In step S70, if the error does not require a retry process, the error correction process can cope with the error. Therefore, the error correction process using the ECC is performed (step S72).

Then, a series of these processes proceeds, and it is checked that all data has been transferred to the Host PC 50 (step
(S92) When all the data has been transferred, the transfer process ends (step S93).

As a result, since error processing can be performed collectively in a predetermined number of sectors (two sectors in the above embodiment), it is not necessary to perform an error check for each sector. Processing is reduced.

In the present embodiment, processing is performed in units of two sectors, and a sector detection interrupt is performed in units of two sectors.
Retry every two sectors. Therefore, the continuity can be easily checked, and a process for connecting the sectors is not required, so that an optical disk drive having a simple configuration can be realized.

Note that the present invention is not limited to the unit of two sectors, but the continuity can be easily checked if the number is an even number.

[0071]

According to the optical disk apparatus and the data processing method of the present invention, the speed of reproducing data from the optical disk can be increased without increasing the processing time of the microprocessor.

[Brief description of the drawings]

FIG. 1 is a block diagram of an optical disk device according to a first embodiment of the present invention.

FIG. 2 is a flowchart of an operation of an interface processor and a microprocessor in the optical disc device according to the first embodiment of the present invention.

FIG. 3 is a block diagram of an optical disc device according to a second embodiment of the present invention.

FIG. 4 is a flowchart of an operation of an interface processor in an optical disc device according to a second embodiment of the present invention.

FIG. 5 is a timing chart in the optical disc device according to the second embodiment of the present invention.

FIG. 6 is a timing chart showing the operation of the microprocessor of the optical disk device according to the second embodiment of the present invention.

FIG. 7 is a block diagram of an optical disc device according to a third embodiment of the present invention.

FIG. 8 is a flowchart of an operation of an interface processor in an optical disc device according to a third embodiment of the present invention.

FIG. 9 is a timing chart showing the operation of the microprocessor of the optical disc device according to the third embodiment of the present invention.

[Explanation of symbols]

 1 Optical disk 10, 20, 30 Interface processor 12 Buffer memory 15, 27, 37 Microprocessor 17 Previous sector address register 18, 28 Error flag memory 25, 35 Sector counter 29 Decimation register 50 Host PC 90 Spindle motor 91 Pickup head ( PUH) 100, 120, 130 optical disk drive

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G11B 20/18 574 G11B 20/18 574H

Claims (8)

[Claims] 1. A sector address storage means for storing a sector address of sector-based data input from an optical disk, a sector address of the sector address storage means, and a sector input before the input data. A first data processing unit having an error flag storage unit for storing an error flag indicating that the data is not continuous when the sector address of the unit data is not continuous; A second data processing means for checking whether or not the data is continuous in sector units by referring to an error flag in the error flag storage means of the first data processing means. Optical disk device. 2. A sector address storage means for storing a sector address of sector-based data input from an optical disk; a sector address of the sector address storage means; and a sector input before the input data. Error flag storage means for storing an error flag indicating that the data is not continuous when the sector address of the unit data is not continuous, and count means for determining the timing of sending an interrupt instruction A first data processing unit comprising: a first data processing unit that checks whether the data is continuous in sector units in response to an interrupt instruction from the first data processing unit; A second data processing unit that performs the processing by referring to the error flag in the error flag storage unit. Optical disk drive. 3. A sector address storage means for storing a sector address of sector-based data input from an optical disk, a sector address of the sector address storage means, and a sector input before the input data. Error flag storage means for storing an error flag indicating that these data are not continuous when the sector address of the data of the unit is not continuous, and counting down each time the data of the sector unit is inputted First data processing means for sending an interrupt instruction when the value of the counting means becomes 0 or an error occurs in the data; and the first data processing means. The first data processing checks whether or not the data is continuous in sector units in response to an interrupt instruction from the first data processing unit. Optical disk apparatus characterized by comprising a second data processing means for performing by referring to the error flag of the error flag storage means means. 4. A counting means for counting down every time data in a sector unit is inputted from an optical disk, and error information indicating an error state of data in each sector unit during a period counted by the counting means. No.
A first error information storage unit, and a second error information storage unit that stores the storage content of the first error information storage unit and that can be referred to by the second data processing unit. Means, and second data processing means for correcting an error in the data of each sector unit based on the storage contents of the second error information storage means of the first data processing means. Optical disk device. 5. A step of storing a sector address for storing a sector address of data in sector units input from an optical disk, a sector address stored in the step of storing the sector address, and the input data. And storing an error flag for storing an error flag indicating that the data is not continuous when the sector address of the data of the sector unit input before is not continuous. A second data processing step of checking whether or not the data is continuous in sector units by referring to an error flag stored in the error flag storage step of the first data processing step. And a data processing step. 6. A step of storing a sector address for storing a sector address of data in a unit of sector input from an optical disk, a sector address stored in the step of storing the sector address, and the input data. When the sector address of the sector unit data input before is not continuous, the step of storing an error flag for storing an error flag indicating that the data is not continuous and sending an interrupt instruction A first data processing step having a step of performing a count for determining a timing of performing the operation, and determining whether or not the data to be performed in response to an interrupt instruction from the first data processing step is continuous in sector units. Checking is performed in a step of storing the error flag of the first data processing step. Data processing method is characterized in that a second data processing steps performed by referring to the error flag stored in. 7. A step of storing a sector address for storing a sector address of data in sector units input from an optical disk, a sector address stored in the step of storing the sector address, and the input data. Storing an error flag for storing an error flag indicating that the data is not continuous when the sector address of the data in the sector unit input before is not continuous; and A step of down-counting the value of the counter every time data is input, and sending an interrupt instruction when the value of the counter becomes 0 or an error occurs in the data by the step of down-counting. A first data processing step, and an interrupt instruction from the first data processing step Checking whether the received data is continuous in sector units is performed by referring to the error flag stored in the step of storing the error flag in the first data processing step. And a data processing method. 8. A step of down-counting the value of a counter every time data in a sector unit is input from an optical disk, and storing error information indicating an error state of data in each sector unit in a period counted in this step. Storing the first error information, and storing the storage content stored in the first error information storing step, and storing the second error information that can be referred to from the second data processing means. A first data processing step comprising the steps of: (a) correcting a data error in each sector unit based on the storage content in the step of storing the second error information in the first data processing step; And a second data processing step.