JP2000215623A - Information recording/reproducing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable next recording without waiting for rotation of a disk by using, when a sector recording means fails in the recording operation, a recovery pipeline control means in place of an ordinary pipeline control means. SOLUTION: When irregularity is detected during recording to an optical disk A7, a retry pipeline means A5b executes in parallel, upon detection of such error, the re-calculation of IED, EDC by data ID, IED, EDC coding means and partial ECC coding by the partial ECC coding means A4d. In the retry pipeline means A5b, re-scrambling is omitted and only the required ECC coding is executed to shorten the time until the recording becomes possible with the means in comparison with the ordinary pipeline A5a. Therefore, the time until the next recording becomes possible from detection of error becomes shorter than the recording time of one block.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording / reproducing apparatus for recording / reproducing information on / from an information storage medium which is recorded / reproduced on a sector-by-sector basis. The present invention relates to an apparatus for recording with parity added.

[0002]

2. Description of the Related Art An optical disk is a typical information recording medium having a sector structure. In recent years, with the increase in the capacity of optical disks such as DVDs, various applications such as moving image recording have been considered. The possibility is expected.

[0003] When sending user data to an optical disk medium, the optical disk drive usually performs data scrambling for energy diffusion and information protection, and encoding of an ECC (error correction code) according to the characteristics and use form of the medium. A series of encoding operations including processing and modulation processing are performed.

FIG. 13 is a block diagram showing an example of a conventional information recording / reproducing apparatus.

An optical disk drive connected to the host device D1 is a microprocessor D that controls the entire drive.
5, a bus control circuit D2 for controlling transmission and reception of commands and data to and from the host device D1, a data recording unit D6 for recording data on the optical disk D7, a buffer unit D3 for temporarily storing recording data, and data in a buffer memory D3. It comprises a buffer control unit D4 for performing transfer control and data processing.

Hereinafter, the operation of the information recording / reproducing apparatus shown in FIG. 13 will be described.

The microprocessor D5 performs the following processing according to a control program stored therein.

The following processing is executed as the first stage. First, user data is received from the host device D1 via the bus control circuit D2 and stored in the buffer memory D3.

Next, the data ID, IED, and EDC adding means D4a adds the address information specified by the host device D1 to the user data in the buffer memory D3 as a data ID as shown in FIG. Further, IED and EDC are calculated from the address information and the user data, and are added to the user data in the buffer memory D3. Sixteen pieces of data created in this way are collected into one user block as shown in FIG.

[0010] Next, by the scrambling means D4b,
A scramble pattern uniquely determined according to the address information of the data ID is applied to the user data to generate a scrambled user block.

Next, as a second stage, the parity as shown in FIG. 16 is calculated for the scrambled user block by the ECC encoding means D4c, and then the parity data area of the buffer memory D3 shown in FIG. Write to.

Next, as a third stage, the data recording unit D6 modulates the scrambled user block and parity block, and outputs the result to the optical disk D7.

Normally, the pipeline means D5a is provided with the first
By sequentially executing the stage to the third stage in parallel, the recording data is output to the recording medium while performing the continuous modulation operation. FIG. 14 shows the state of the execution.

[0014]

When recording on an optical disc cannot be performed due to detection of an error such as an address error or the like, recording is performed at another location in the recording medium. When the property is required, it is not a replacement area but a place close to the original recording location (usually the next block on the recording medium)
It is important to record as soon as possible. Such a defect management method by block slipping is proposed in WO 98/14938 by Goto et al.

However, in the conventional ordinary pipeline means D5a, the recording location is changed, that is, the data ID is changed.
When the change occurs, the scramble pattern is affected, and it is necessary to start over from the first stage. As shown in FIG. 14, it takes a lot of time (t5 to t7) until recording becomes possible. However, there has been a problem that a disk rotation wait occurs.

The present invention has been made in view of this point.
An object of the present invention is to start the next recording without waiting for the rotation of the disk by shortening or eliminating the time until recording becomes possible when the recording location is changed.

[0017]

In order to achieve the above object, an information recording / reproducing apparatus according to the present invention is connected to a higher-level apparatus and is provided on an information storage medium which is recorded and reproduced in sector units. A buffer for temporarily holding data, data receiving means for receiving user data from a higher-level device and storing the data in the buffer, and sector identification information comprising a sector number and an attribute corresponding to the user data in the buffer. ID scrambling means for processing the user data into scrambled data by referring to the number of the sector identification information and storing the scrambled data in the buffer; and an error correction code for the sector identification information and the scrambled data. ECC encoding means for generating and storing in the buffer the attribute of the sector identification information ID replacement means for rewriting to a value indicating positive and storing in the buffer, partial ECC encoding means for generating only an error correction code affected by the value of the identification information and storing in the buffer, A sector recording unit for recording the data held in the buffer on the information storage medium; and a data receiving unit, the ID adding unit, the scrambling unit, the ECC encoding unit, and the sector recording unit in a predetermined order. Recovery pipeline control means for operating the ID replacement means, the partial ECC encoding means, and the sector recording means in a predetermined order, wherein the sector recording means performs recording. Use the recovery pipeline control means instead of the normal pipeline control means when the operation of And wherein the door.

According to a second aspect of the present invention, there is provided an information recording / reproducing apparatus for temporarily storing an information storage medium which is connected to a higher-level apparatus and which records and reproduces data in sector units. A data buffer for storing data, an auxiliary partial buffer, a data receiving means for receiving user data from a higher-level device and storing the data in the buffer, and a sector identification information comprising a sector number and an attribute corresponding to the user data in the buffer. ID adding means stored in the
A scrambler for processing the user data into scrambled data by referring to the number of the sector identification information and storing the scrambled data in the buffer; and generating an error correction code for the sector identification information and the scrambled data and storing the error correction code in the buffer. ECC encoding means, ID rewriting means for rewriting the attribute of the sector identification information to a value indicating that the sector number is invalid and storing the value in the auxiliary partial buffer, and error correction affected by the value of the identification information A partial ECC encoding unit for generating only a code and storing the code in the auxiliary partial buffer; and storing the data held in the buffer or data obtained by partially replacing the data with the data held in the auxiliary partial buffer. Sector recording means for recording on a medium, the data receiving means and the ID
Pipeline control means for operating the adding means, the scrambling means, the ECC encoding means, the ID changing means, the partial ECC encoding means, and the sector recording means in a predetermined order; The means is characterized in that when the recording operation fails, the data held in the auxiliary partial buffer is used. I do.

According to a third aspect of the present invention, there is provided an information recording / reproducing apparatus according to the present invention, wherein the information recording / reproducing apparatus is connected to a higher-level apparatus and temporarily stores and reproduces information in a sector unit. A buffer for holding data, a data receiving means for receiving user data from a higher-level device and storing the data in the buffer, a means for processing the user data into data to be recorded in a first sector, At least two or more pipeline control means for processing the user data into data to be recorded in a second sector behind a predetermined sector, and the data processed by any one of the pipeline control means is stored in the information recording medium. Sector recording means for recording, wherein the pipeline control means comprises a sector number and an attribute corresponding to the user data, respectively. A plurality of ID adding means for storing sector identification information in the buffer; a plurality of scrambling means for processing the user data into scrambled data by referring to the number of the sector identification information and storing the scrambled data in the buffer; A plurality of ECC encoding means for generating identification information and an error correction code for the scrambled data and storing the same in the buffer, each time the sector recording means fails in a recording operation, Switching the pipeline control means for processing the existing data. I do.

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a block diagram showing a configuration of an information recording / reproducing apparatus according to Embodiment 1 of the present invention.

The optical disk drive includes a microprocessor A5 for controlling the entire drive, a bus control circuit A2 for controlling transmission and reception of commands and data to and from the host device A1, and a data recording unit A for recording data on the optical disk A7.
6. Buffer memory A for temporarily storing recording data
3. It includes a buffer control unit A4 that controls data transfer and data processing of the buffer memory A3.

The microprocessor A5 performs the following control according to a control program stored therein.

The normal pipeline means A5a first executes the following procedure as the first stage. First, user data is received from the host device A1 to the buffer memory A3 via the bus control circuit A2. Data ID, IED, E
The DC adding unit A5a adds a data ID including the address information specified by the host device A1 to the user data in the buffer memory A3, calculates IED and EDC, and adds the IED and EDC to the user data to generate a user block. The scrambling means A5b generates a scrambled user block by applying a scrambling pattern uniquely determined according to the address information of the data ID to the user data.

Next, as a second stage, the ECC encoder A5c calculates a parity for the scrambled user block, and then writes the parity in the parity data area of the buffer memory A3.

Next, as a third stage, the data recording section modulates the scrambled user block and parity block, and outputs the result to a recording medium.

Normally, the pipeline means A5a is provided with the first
By sequentially executing the stage to the third stage in parallel, the recording data is output to the recording medium while performing the continuous modulation operation. FIG. 2 shows the state of the execution.

If an error such as an address error is detected during recording on the optical disk A7 and recording is not possible, immediately after the error is detected, the retry pipeline means A5b uses the data ID, IED and EDC encoding means A5a to execute the IE.
The recalculation of D and EDC and the partial ECC encoding by the partial ECC encoding means A5d are executed in parallel. FIG. 2 shows the state of the execution. The data ID, IED, EDC adding means A5a sets the block slipping bit of the data field information of the first byte of the data ID of the user block (block 1) to be recorded, as shown in FIG. The recalculation is performed, and the data field information, IED, and EDC of the data ID of the user block are rewritten. Similarly, the next user block (block 2)
Field information of data ID of IED, EDC
Is rewritten. The partial ECC encoding means A5d includes data field information of the data ID of block 1, IED, E
When the rewriting of DC is completed, as shown in FIG.
Data field information of data ID of block 1, IE
ECC encoding is performed only on D and EDC, and a part of the parity block is rewritten.

At the time of recording to the next recording location (the next block on the recording medium), that is, at the time of executing the third stage, the normal pipeline means A5a changes the state immediately before the error detection to the first stage and the second stage. Resume parallel execution.

As described above, the retry pipeline means A5b omits the re-scrambling and executes only the minimum necessary ECC encoding, so that the retry pipeline means A5b has a shorter time until the means can be recorded than the normal pipeline A5a. Is significantly shorter. Therefore, the time from the detection of an error until the next recording becomes possible is shorter than the recording time of one block. Time until it becomes possible)
If an error is detected within this time, recording on the next recording location (the next block on the recording medium) becomes possible without waiting for rotation.

(Embodiment 2) FIG. 5 is a block diagram showing a configuration of an information recording / reproducing apparatus according to Embodiment 2 of the present invention.

The optical disk drive includes a microprocessor B5 for controlling the entire drive, a bus control circuit B2 for controlling transmission and reception of commands and data to and from the host device B1, and a data recording unit B for recording data on the optical disk B7.
6. Buffer memory B for temporarily storing recording data
3. Includes a buffer control unit B4 that controls data transfer and data processing of the buffer memory B3.

The buffer memory B3 includes an auxiliary buffer B3
a and are arranged as shown in FIG.

The microprocessor B5 performs the following control according to a control program stored therein.

The normal pipeline means B5a first executes the following procedure as the first stage. First, user data is received from the host device B1 to the buffer memory B3 via the bus control circuit B2. Data ID, IED, E
The DC adding unit B4a adds a data ID including the address information specified by the host device to the user data in the buffer memory B3, calculates IED and EDC, and adds the IED and EDC to the user data to generate a user block. Next, the scrambler B4b generates a scrambled user block by applying a scramble pattern uniquely determined according to the address information of the data ID to the user data.

Next, as a second stage, the ECC encoder B4d calculates a parity for the scrambled user block, and then writes the parity in the parity data area of the buffer memory B3.

Next, as a third stage, the data recording section B
Numeral 6 modulates the scrambled user block and parity block and outputs the result to a recording medium.

Normally, the pipeline means B5a is provided with the first
By sequentially and sequentially executing the stages from the stage to the third stage, the recording data is output to the recording medium while performing the continuous modulation operation. FIG. 7 shows the state of the execution.

The auxiliary pipeline means B5b performs the following two stages of parallel operation on the auxiliary buffer B3a. First, as the first stage, data ID, IE
The D and EDC adding means B4a outputs the data I shown in FIG. 3 of the user block immediately after the IED and EDC calculations are completed.
A block slipping bit of the data field information of the first byte of D is set, stored in the auxiliary buffer B3a, and IED and EDC are recalculated.
The result is stored in the auxiliary buffer B3a. As the second 'stage, as shown in FIG. 4, the partial ECC encoding means B4a performs ECC encoding on the first byte, IED, and EDC of the data ID on the auxiliary buffer, and stores it in the auxiliary buffer B3a. FIG. 7 shows the state of the execution.

If recording is not possible by detecting an error such as an address error during recording on the optical disk B7, the above two parallel operations (parallel operation by normal pipeline means and parallel operation by auxiliary pipeline means) are interrupted. At the time of recording to the next recording location (the next block on the recording medium), the two parallel operations are restarted from the state immediately before error detection. At this time and at the time of the next block recording, the output switching means B5c causes the data field information of the data ID stored in the auxiliary buffer B3a, IED, EDC
And their parities are output to the data recording unit.

As described above, since the output of the data field information of the data ID, IED, EDC, and their parity is switched to the auxiliary buffer B3a, recording can be performed immediately after an error is detected. Therefore, even if an error is detected at any time from the start to the end of recording of one block, recording on the next recording location (the next block on the recording medium) can be performed without waiting for rotation.

(Embodiment 3) FIG. 8 is a block diagram showing a configuration of an information recording / reproducing apparatus according to Embodiment 3 of the present invention.

The optical disk drive includes a microprocessor C5 for controlling the entire drive, a bus control circuit C2 for controlling transmission and reception of commands and data to and from the host device C1, and a data recording unit C for recording data on the optical disk C7.
6. Buffer memory C for temporarily storing recording data
3. Includes a buffer controller C4 that controls data transfer and data processing of the buffer memory C3.

The buffer memory C3 includes the area 1, the area 2,
The region 3 includes a user data region and a parity data region, as shown in FIG.

The microprocessor C5 performs the following control according to a control program stored therein.

The three-stage pipeline means C5a includes the following three steps:
The parallel operation of the stages is performed as shown in FIG. A state in which no error has occurred at the time of recording (before t4) will be described.

The parallel operation of the first stage firstly includes the first operation of the first stage.
Perform the following steps as a stage. The user data is received in the area 1 of the buffer memory C3 from the host device C1 via the bus control circuit C2. Data ID, IED, E
The DC adding unit 1C4a adds a data ID including the address information specified by the higher-level device C1 to the user data in the area 1, calculates IED and EDC, adds the IED and EDC to the user data, and generates a user block. Next, the scrambler 1C4b generates a scrambled user block by applying a scramble pattern uniquely determined according to the address information of the data ID to the user data.

Next, as a second stage of the first stage, EC
The C encoding unit 1C4c calculates the parity of the scrambled user block in the area 1 and then calculates the parity in the area 1
Is written to the parity data area.

Next, as a third stage, the data recording unit C6 modulates the scrambled user block and parity block in the area 1, and outputs the modulated data to the optical disk C7.

In the second stage parallel operation, a data ID is generated based on the address information one block ahead, and the first and second stages are executed. First, the following procedure is executed as the first stage of the second stage. The buffer control unit C4 copies the user data received in the area 1 of the buffer memory C3 to the area 2. The data ID, IED, and EDC adding means 2C4d is a data ID including address information indicating one block ahead of the address specified by the higher-level device C1.
Is added to the user data in area 2 and IED, E
The DC is calculated and added to the user data to generate a user block. Next, the scrambler 2C4e generates a scrambled user block by applying a scramble pattern uniquely determined according to the address information of the data ID to the user data.

Next, as a second stage of the second stage, EC
The C encoding unit 2C4f calculates the parity of the scrambled user block in the area 2 and then calculates the parity in the area 2
Is written to the parity data area.

In the third stage parallel operation, a data ID is generated based on the address information two blocks ahead, and the first stage and the second stage are executed. First, the following procedure is executed as the first stage of the third stage. The buffer control unit C4 copies the user data received in the area 1 of the buffer memory C3 to the area 3. The data ID, IED, EDC adding means 3C4g adds a data ID including address information indicating two blocks ahead of the address specified by the higher-level device to the user data in the area 3, and adds IED, EDC
Is calculated and added to the user data to generate a user block. Next, the scramble means 3C4h outputs the data I
The scramble pattern uniquely determined according to the address information of D is adapted to the user data to generate a scrambled user block.

Next, as the second stage of the third stage, EC
The C encoding means 3C4i calculates parity for the scrambled user block in the area 3, and then calculates
Is written to the parity data area.

In FIG. 10, the block n: m is described as follows: n is the user block number starting from 0, and m is the address information in the data ID as compared with the case where no error has occurred. , M blocks ahead.

If no error has occurred during recording, the user block and parity block in area 1 are output to the data recording section C6 and the third stage is executed, but as shown in FIG. During the recording, if an error such as an address error is detected during recording on the recording medium and recording cannot be performed, the user block and parity block in the area 2 are selected at the start of the next recording operation (t5), and the data recording section C6 is selected. And the third stage is executed. At this time (t5), the region 1 selected between t4 and t5
In the first stage of the first stage,
A data ID is generated based on the address information of the block destination, and IED and EDC are calculated and scrambled.

That is, assuming that the execution block number of the first stage with respect to the area selected immediately before (t4 to t5) is n and the deviation of the address information is m, t5 (at the start of the parallel operation immediately after the error is detected) From block n-2
Is changed to generate the data ID based on the address information of the (m + 3) block ahead and execute the first stage.

If the error has occurred n times,
The user block and the parity block in the area ((n mod 3) +1) are output to the recording unit C6, and the third stage is executed.

The three-stage pipeline means C5a outputs the recording data to the optical disk C7 while performing the continuous modulation operation by sequentially executing the three-stage parallel operation in parallel.

FIG. 10 shows an example of a case where an error occurs continuously for two blocks.

FIG. 11 shows an example in which a total of two blocks occur every other error.

As described above, the calculation of IED and EDC and the calculation of their parity are always performed by the data ID including the address information of the previous block.
It is possible to record a user block having a different data ID immediately after detecting an error. Therefore, even if an error is detected at any time from the start to the end of recording of one block, recording on the next recording location (the next block on the recording medium) can be performed without waiting for rotation.

[0062]

As described above, according to the present invention, when the recording location is changed, the next recording can be started without waiting for the rotation of the disk by shortening or eliminating the time until recording becomes possible. can do.

For this reason, in a system that requires real-time performance such as recording of a moving image, even when recording on a recording medium cannot be performed at another location, recording on the recording medium can be performed quickly. A decrease in the transfer rate can be kept low.

Therefore, the user data can be recorded on the disk in real time even at a higher transfer rate.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an information recording / reproducing apparatus according to Embodiment 1 of the present invention.

FIG. 2 is an explanatory diagram of an operation of the information recording / reproducing apparatus according to the first embodiment of the present invention.

FIG. 3 is a configuration diagram of a sector according to the first and second embodiments of the present invention.

FIG. 4 is an explanatory diagram of partial ECC encoding according to the first and second embodiments of the present invention.

FIG. 5 is a configuration diagram of an information recording / reproducing apparatus according to Embodiment 2 of the present invention.

FIG. 6 is a configuration diagram of a buffer memory according to a second embodiment of the present invention.

FIG. 7 is an explanatory diagram of an operation of the information recording / reproducing apparatus according to the second embodiment of the present invention.

FIG. 8 is a configuration diagram of an information recording / reproducing apparatus according to Embodiment 3 of the present invention.

FIG. 9 is a configuration diagram of a buffer memory according to a third embodiment of the present invention.

FIG. 10 is an explanatory diagram of an operation of the information recording / reproducing device according to the first embodiment of the present invention.

FIG. 11 is an explanatory diagram of an operation of the information recording / reproducing device according to the first embodiment of the present invention.

FIG. 12 is an explanatory diagram of an operation of the information recording / reproducing device according to the first embodiment of the present invention.

FIG. 13 is a configuration diagram of an information recording / reproducing apparatus in a conventional example.

FIG. 14 is a diagram illustrating the operation of a conventional information recording / reproducing apparatus.

FIG. 15 is a configuration diagram of a general sector.

FIG. 16 is an explanatory diagram of general ECC encoding.

FIG. 17 is a configuration diagram of a general buffer memory;

[Explanation of symbols]

A1, B1, C1, D1 Host device A2, B2, C2, D2 Bus controller A3, B3, C3, D3 Buffer memory B3a Auxiliary buffer A4, B4, C4, D4 Buffer controller A4a, B4a, C4a, C4d, C4g , D4a Data ID, IED, EDC addition means A4b, B4b, C4b, C4e, C4h, D4b Scrambling means A4c, B4c, C4c, C4f, C4i, D4c E
CC encoding means A4d, B4d Partial ECC encoding means A5, B5, C5, D5 Microprocessor A5a, B5a, C5a, D5a Normal pipeline means A5b Retry pipeline means B5b Auxiliary pipeline means B5c Output switching means C5a Three-stage pipe Line means A6, B6, C6, D6 Data recording unit A7, B7, C7, D7 Optical disk

Claims (3)

[Claims] 1. A buffer for temporarily storing data in an information storage medium connected to a higher-level device and recorded and reproduced in sector units, and data for receiving user data from the higher-level device and storing the data in the buffer Receiving means; ID adding means for storing sector identification information comprising a sector number and an attribute corresponding to the user data in the buffer; and processing the user data into scrambled data by referring to the sector identification information number. And an EC for generating an error correction code for the sector identification information and the scrambled data and storing the same in the buffer.
C encoding means, ID rewriting means for rewriting the attribute of the sector identification information to a value indicating that the sector number is invalid and storing it in the buffer, and only error correction codes affected by the value of the identification information A partial ECC encoding unit for generating and storing the data in the buffer; a sector recording unit for recording data held in the buffer on the information storage medium; a data receiving unit, the ID adding unit, the scrambling unit; A normal pipeline control means for operating the ECC encoding means and the sector recording means in a predetermined order, a recovery for operating the ID replacement means, the partial ECC encoding means and the sector recording means in a predetermined order. Pipeline control means, wherein when the sector recording means fails in the recording operation, the normal pipeline control means is provided. Alternatively, the information recording and reproducing apparatus, characterized by using said recovery pipeline control means. 2. An information storage medium which is connected to a host device and which records and reproduces data in sector units, a buffer for temporarily holding data and an auxiliary partial buffer; A data receiving unit that stores the user data in the buffer; an ID adding unit that stores sector identification information including a sector number and an attribute corresponding to the user data in the buffer; Scrambling means for processing into scrambled data and storing the same in the buffer; EC for generating the sector identification information and an error correction code for the scrambled data and storing the same in the buffer
C encoding means; ID rewriting means for rewriting the attribute of the sector identification information to a value indicating that the sector number is invalid and storing it in the auxiliary partial buffer; and error correction code affected by the value of the identification information. A partial ECC encoding unit that generates only the data and stores the data in the auxiliary partial buffer; and the data stored in the buffer or data in which a part of the data is replaced with the data stored in the auxiliary partial buffer. The data receiving means, the ID adding means, the scrambling means, the ECC encoding means, the ID replacement means, the partial ECC encoding means, and the sector recording means in a predetermined order. Pipeline control means for operating in the, the sector recording means, when the recording operation has failed,
An information recording / reproducing apparatus using data held in the auxiliary partial buffer. 3. A buffer for temporarily storing data in an information storage medium which is connected to a higher-level device and is recorded and reproduced in units of a sector; and data for receiving user data from the higher-level device and storing the data in the buffer. Receiving means for processing the user data into data to be recorded in a first sector; and processing the user data into data to be recorded in a second sector that is a predetermined sector behind the first sector. Two or more pipeline control means, and sector recording means for recording data processed by any one of the pipeline control means on the information recording medium, wherein each of the pipeline control means corresponds to the user data. A plurality of IDs for storing in the buffer sector identification information comprising a sector number to be performed and an attribute.
Adding means, a plurality of scrambling means for processing the user data into scrambled data with reference to the number of the sector identification information and storing the scrambled data in the buffer; and an error correction code for the sector identification information and the scrambled data. A plurality of ECC encoding means for generating and storing the data in the buffer, wherein each time the sector recording means fails in the recording operation, the pipeline control processing the data used by the sector recording means. An information recording / reproducing apparatus characterized by switching means.