JP2001283515A - Optical disk controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quicken a process for transferring data between a system controller and an optical disk controller which have different standards and recording systems and to make recording continuous. SOLUTION: The process is performed by sectors and different data generating methods and encoding methods are managed by the sectors; and each sector is provided with a control code in this case. For recording, a data generating method and an encoding method are determined by referring to the control code. In the control code, a flag is provided which indicates a sector where the data generating method and encoding method are switched and the switching of the processing method is recognized by referring to this flag to obtain a parameter. In case of an underrun, specific data are copied and recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk recording apparatus, and more particularly to a technique for continuously and rapidly recording data having different standards and recording methods.

[0002]

2. Description of the Related Art With the recent development of digital signal recording technology, CD (compact disk) -R / RW
(Recordable / Rewritable, Recordable / Rerecordable CD) Various standards and recording methods have been developed and adopted for recording devices. The recording standards include CD-DA, CD-ROM MODE1, and C-ROM.
D-ROM MODE2, CD-ROM MODE2
XA FORM1, CD-ROM MODE2 XA
FORM2 and the like. These standards themselves are
Red Book, Yel such as SONY, PHLIPS
low book, Green Book, Orange
Since this is a so-called well-known matter introduced in e-book (1981-1996) and the like, the description of its contents and features will be omitted.

[0003] In the recording method, data is scrambled in accordance with a standard or a request from a host PC.
e, randomization of data for pits to change randomly) may or may not be performed.

For this reason, it is becoming increasingly common to record game programs and data of different standards and recording methods, such as music, on optical discs such as game CDs.

In this case, a command is issued from the system controller to the optical disk controller, and when the processing of the command is completed, a termination interrupt is generated in the system controller. By the way, to record data of different standards and recording methods, the main 2352
It is necessary to manage the encoding process in units of at least one section of a block consisting of 96 bytes and a subcode of 96 bytes, that is, in units of sectors. And in the form of a command, and performs encoding control (such as processing for correct error correction during reproduction) and calculation control according to the standard and recording method. Specifically, for example, a CD error correction method (C
EFM modulation from IRC) is performed for CD media recording, an error detection code (EDC) and an error correction parity are added, and an error detection subcode is added.

[0006] In addition, a sector (secto) is used for recording a CD.
Since there is no concept of (r, at least one section of a recording block), once recording is started, recording cannot be interrupted until a target end block. For this reason, the optical disk controller receives data to be recorded from the host PC before recording data having a different standard and recording method on the optical disk,
This is temporarily buffered on the memory, and the same encoding process is performed in one recording command.

That is, in a CD-R / RW recording apparatus that supports data of different standards and recording methods, if the data format is different, it is necessary to perform an encoding process according to the standard. For example, mode in the packet system
When recording the data of No. 1, LINK, RUN-IN,
Mode 1 and RUN-OUT are switched, and each requires encoding. Therefore, if the standard is different, such processing is necessary again.

As a result, every time the system controller switches between the standard and the recording system, it is necessary to issue the information as a command WT to the optical disk controller and monitor the recording command end interrupt.

As a result, for example, in one recording process, C
MODE1 data of the D-ROM is recorded in 50 sectors,
If it is desired to record MODE2 data in the next 50 sectors without interruption, the system controller must issue the second recording command after waiting for the end of the first recording command.

This situation will be described more specifically with reference to FIG. This figure shows a command issuance when data 1 to 3 and data 4 to 6 having different standards and recording methods are received from the host PC and recorded on the optical disk. Since data 1 to 3 and data 4 to 5 have different standards, it is necessary to issue data 1 to 3 and data 4 to 5 from the system controller with different command parameters. In this case, when buffering data,
Commands are issued twice each for data recording. In this figure, the data reception command to be buffered is RCV, and the recording command to start recording on the disc is WT.
And

By the way, in this case, especially for CD-R recording, there is no concept of a sector as described above, so that interruption of data being written is not allowed.

[0012]

However, in the prior art, as shown in this figure, the next recording command WT2 must be issued after the end interruption of the recording command WT1, so that it takes some time. is necessary.
That is, no matter how much the system controller issues the next recording command WT2 immediately after receiving the termination interrupt of the recording command WT1, there is a limit. For this reason, with the increase in the recording speed in recent years, there is a possibility that this processing may not be completed in time and data may be interrupted.

In addition to the above reasons, when data is not transferred from the host PC for some other reason, that is, when an underrun occurs, the optical disk controller issues an interrupt to the system controller indicating that the system controller is in a buffer empty state. Then, the system controller receiving the notification has to issue a recording operation interruption command to the optical disk controller to interrupt the recording.

Also, due to the characteristics of the above-described CD-R / RW recording apparatus, once recording is started, the operation cannot be interrupted until the recording is completed. For this reason, it is necessary to perform continuous recording when recording is started, and data of a different standard and recording method may be recorded during the recording.

In the case where the standard and the recording system are frequently switched, when a command is issued between the system controller and the optical disk controller, the command is received, and the command is being executed,
Since a series of command transmission / reception after the normal termination of the command is increased and a large time loss occurs, it is not possible to design a high speed operation. The burden on each of the system controller and the optical disk controller has increased.

For this reason, when recording data having different standards and recording methods for recording music and programs on an optical disc, the data can be recorded at a high speed even if the standards are changed complicatedly. Therefore, it has been desired to develop an inexpensive optical disk controller or such a technique that enables data recording to be continued even if an underrun occurs due to the above reasons.

[0017]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the optical disk controller has a built-in microprocessor (MCU). The function of the system controller is burdened, data recording with a different standard and recording method is performed stably, and at the same time, processing when an underrun occurs is performed.

Also, the MCU and the system controller use the encoding processing method and the parameters of the recording operation as control codes at the time of recording, and manage the sectors in units.

Here, the control code is LINK, RUN
-IN, RUN-OUT, a method for generating main data of gap data, a method for encoding CD-ROM, a method for encoding CD, a method for generating subcode, and a method for encoding subcode are collectively converted into codes. It is arranged on the memory together with the data. As a result, it is possible to perform processing according to the standard and the recording method according to the control code for each sector.

Since a recording command cannot be issued many times, a main data generation command, a CD-ROM and a CD encoding method setting command are provided to perform the operation. When these setting commands are received during the recording command operation, a control code is generated for each sector, and the control code is held in sector units simultaneously with buffering.

Although the standard and the recording method need to be managed in units of one sector, the same standard and the recording method may be continued in some cases.
For this reason, a flag is provided in the control code, a main data generation command and an encoding method setting command are issued in a sector where the standard and the recording method are switched, and the optical disk controller sets the flag in the control code. . Therefore, when the flag is not set, it is the same as the standard and recording method of the immediately preceding sector.

Therefore, only when the flag is set, the control code held for each sector is referred to, thereby reducing the processing load on the optical disk controller. After referring to the flag, the flag is dropped.

When the buffer empty state is detected, it is recognized that an underrun has occurred, and the host PC generates data at an address of a memory to be buffered. The generated data is generated in advance by the system controller at an arbitrary address on the memory for an arbitrary sector.
Therefore, the optical disk controller copies arbitrary data generated by the system controller on the memory by an operation setting command when an underrun occurs. The standard and the processing method at this time follow the same parameters as when the underrun occurred.

[Detailed Description of the Invention] The present invention will be described below based on its embodiments.

(First Embodiment) In the present embodiment, a control code is held in units of sectors and used for each processing.

Hereinafter, the optical disk controller of this embodiment will be described.

FIG. 2 shows the overall configuration of the CD-R / RW optical disk recording apparatus of the present embodiment.

In FIG. 1, reference numeral 101 denotes a CD-R recording disk or a CD-RW recording disk. 1
Numeral 02 denotes a pickup which incorporates a laser (not shown) and detects (electrically reproduces) and records data on an optical disk. Reference numeral 103 denotes a laser controller that controls a laser during recording. An optical disk controller 104 performs the above-described various encodings (processes) during recording. Reference numeral 105 denotes a system controller that controls the entire optical disc recording apparatus. Reference numeral 106 denotes a host PC (program counter). The host PC controls driving of the optical disc recording apparatus, transfer of recorded data, and the like. (Strictly speaking, this host PC is outside the optical disk device according to the present invention.) Then, the system controller 105 interprets the command from the host PC 106 through the optical disk controller 104 and controls the entire system. ing. Of course, the recording method transmitted from the personal computer is also known by the command. Furthermore, the encoding information and the presence / absence of scrambling are described in “Write Param.
eters Mode Page ". Therefore, the system controller 105 and the optical disk controller 104 are connected by an address bus, a data bus, a chip select, a write, and a read signal.

Next, the internal configuration of the optical disk controller 105 will be described.

Reference numeral 107 denotes an optical disk controller 104
This is a micro control unit that performs control and calculations. 108 is a bus controller and a DMA (direct
tmemory access). Reference numeral 109 denotes an ATIP circuit that demodulates a wobble signal recorded in an analog manner on the disk surface and controls peripheral blocks. Reference numeral 110 denotes a write strategy circuit that generates an optimal laser control signal according to the recording speed. 111
Is a CD encoding circuit that performs CIRC encoding and EFM modulation. Reference numeral 112 denotes a built-in DRAM. 113
Is a host interface.

In addition to the above, although not directly related to the gist of the present invention, the reference numerals are not used, but they include a spindle motor, a drive IC, a front end, a processor, a servo controller, and the like.

Based on the above, the bus controller 108
Under the control of the micro control unit 107, data transfer and bus arbitration between the host interface 113 and the DRAM 112, between the CD encoder 111 and the DRAM 112, and the like are performed.

In the recording mode, each section of the optical disk controller exerts its function under the following operation.

In order to start recording from a designated address on the optical disc 101, the micro control unit 107
Is provided to the ATIP circuit 109 by the system controller 105.
Is issued at the same time as the recording start instruction. When the ATIP circuit 109 detects the start address of the recording operation based on the wobble signal,
The D encoder 111 and the write strategy circuit 110 are activated. The CD encoder 111 requests data from the bus controller 108, and the DMA 108 transfers predetermined data to the CD encoder 111. The encoded data is moved from the pickup 102 to the optical disk 101, and recording from the recording start address starts.

Transmission and reception of commands and data transferred from the host PC 106 to the optical disk controller 104 are performed through a host interface 113 in the optical disk controller 104. When the recording mode is set from the host PC 106, the system controller 1
05 issues a command to the optical disk controller 104 in accordance with a command from the host PC.

For example, when a WT command is issued from the host PC 106, the optical disk controller 104
Starts operation in response to a command issued from the system controller 105.

Recording mode (in the writing method, DISC
AT ONCE, etc., and CD mode has RAW, etc.). In this case, a parameter sheet is sent from the host PC 106 to the optical disc recording apparatus according to write parameters. The system controller 105 can know information on the recording method of data to be recorded from now on the basis of the write parameters. System controller 1
In step 05, information on data to be buffered is given as a parameter to the optical disk controller 104. The content is mainly a CD-ROM encoding method, that is, a CD-ROM mode (mode1, mode).
de2, etc.), and information on a different encoding method and CD encoding method is issued as an encoding method setting command together with parameters.

Next, a data reception command for buffering data is issued from the host PC 106, and data buffering is performed. Thereafter, encoding is performed according to the recording method, and recording is performed thereafter.
Specifically, for example, the host PC sends a command WT, followed by the recording start address, the number of recording sectors, etc. as a parameter, and the recording of a predetermined number of sectors is performed from the address.

FIG. 3 conceptually shows the structure of the memory map of the DRAM. In the figure, reference numeral 201 denotes a DRAM 11
2 is the entire memory map. Inside it, but 2
02 is for buffering data transferred from the host PC 106, and for LINK, RUN-IN, RUN-
This is a ring buffer for memory-copying OUT and gap data and temporarily storing the data. This ring buffer is conceptually donut-shaped, in which data to be sent is recorded at an address along the donut, and overwritten once the circuit goes around. The capacity occupies most of the capacity of the DRAM.

Reference numeral 203 denotes a buffer area for storing data serving as copy source data when a data generation command is issued and copy source data for generating data when an underrun occurs. Reference numeral 204 denotes a table area for storing copy source data when a sub-coat is generated. (Note that these areas do not change when recording is started, and are referred to as copy sources.) 205 shown on the right of 201 indicates a memory map of each page in the ring buffer 202. The one-page memory map 205 will be described.

Each page of the ring buffer memory is
Main data section 2352B (byte) and subcode section 9
6B, a subcode PQ section 16B, and a control code 16B. LINK, RUN-IN, RU
The area for IN-OUT and gap data generation is mapped by an arbitrary number of sectors according to the main data section 2352B. According to each standard, the main data section includes CD-DA, CD-ROM MODE1, CD-R
OM MODE2, CD-ROM MODE2XAF
ORM1, CD-ROM MODE2 XA FORM
Use 2 properly.

Reference numeral 206 denotes a main data area having a capacity of 2352B. Reference numeral 207 denotes a subcode PW area having a capacity of 96B. Reference numeral 208 denotes a subcode PQ area having a capacity of 16B. A control code 209 has a capacity of 16B and is added to each sector. Note that the main data 2352B and the subcode 96B are standardized values. The subcode includes P (pause section), Q (time information), and the like.

Based on the above groups, for example, CD-Text and CD
In -G (Karaoke with picture etc.), music is put in the main data, and data such as picture is put in the subcode.

The details of the control code 209 are shown below. Hereinafter, the contents will be described based on this. 210
Is a data generation code. LINK, RUN-I
When data generation such as N, RUN-OUT, and gap is required, the data generation method is optionally held, and when copying from the data generation buffer area 203, a copy source area is specified. 211 is an encoding method code. A CD-ROM encoding method, a CD encoding method, and a subcode encoding method are optionally held. In the case of a CD-ROM, header information is stored in MODE2.
In the case of XA, it holds subheader information. 212 is
This is a subcode generation code. When copying from the subcode generation method and the subcode table area 204, the copy source table number is held.

The operation of the optical disk controller having the above configuration will be described below with reference to FIG.

This figure shows transmission and reception of commands between the system controller 105 and the optical disk controller 104.
In the figure, a downward arrow 301 indicates a command issuance from the system controller 105 to the optical disk controller 104. An upward arrow 302 indicates the end of execution of the command received by the optical disc controller 104,
Interruption.

Data 1, 2, and 3 having the same standard and recording method, and data 4 having a different standard and recording method,
When recording the data 5 and 6 on the optical disk 101 with a single recording command WT, an encoding method setting command SET1 for data 1, 2, and 3 is issued, a command RCV2 for buffering data is issued from the host PC 105, and a recording command WT is issued. Issue Similarly, data 4, 5, 6
Is issued, and a buffering command RCV2 is issued.

At this time, the number of recording commands WT is one unlike in FIG. That is, a feature of the present embodiment is that data 1 to 3 and data 4 to 6 of different standards and recording methods are recorded by a single recording command WT. Hereinafter, the internal processing of the optical disk controller 104 will be described.

The data to be recorded is transferred from the host PC 106 to the optical disk controller 104, and the data received through the host interface 113 is stored in the built-in DRAM 112 by the bus controller and the DMA controller 108 in the built-in DRAM 112 for each page according to the CD standard. Is stored at the address. At this time, buffering is performed on a sector basis and stored at a predetermined address according to the memory map.

When buffering is performed for a predetermined number of sectors, the system controller 105 issues a recording command WT to the optical disk controller 104. Upon receiving the issued recording command WT, the optical disk controller 104 drives each unit to start recording on the disk 101. By the way, CD-RO of each sector
The M and CD encoding methods are held in the control code area as control codes. Therefore, encoding is performed according to this control code.

The control code includes a data generation code and a CD.
-Consists of a ROM encoding method code, a CD encoding method code, a subcode generation method code, and a subcode encoding method code.

The data generation code is mainly composed of LINK, RUN-IN, and R based on the CD-R / RW recording standard.
This is a control code for generating data to be recorded by the optical disk controller for recording data such as UUN-OUT, gap, and the like, for which data is not transmitted from the host PC. For example, when one packet is recorded, L is added before user data actually received from the host PC.
INK, RUN-IN1 to RUN-IN4 are recorded,
The user data of the specified length is recorded and RUN-O
UT1, RUN-OUT2 are recorded, and recording is completed. Also, when recording other than user data,
Any data is copied, but the address on the memory at which the arbitrary data is to be recorded is specified.

The encoding method code is mainly CD-R
This is provided because the encoding method differs depending on the OM mode. As the CD-ROM encoding, an option for generating / not generating a sync, a header, a subheader, EDC, and ECC parity and initial values of the header and the subheader are held.

In the header, address information of each sector is recorded. Since data which is incremented from the initial value is recorded, the microprocessor of the optical disk controller calculates the initial value for each sector.

The generation of the EDC and ECC parity is as follows.
Since it differs depending on the mode, it is determined from the mode information of the header, the EDC and ECC parities of a predetermined mode are calculated, and written back to a predetermined address of the DRAM.

As described above, according to the present embodiment, for data processing in units of sectors, a control code is held in units of each sector, and a data generation method for the sector during recording is provided.
Refer to the encoding method. Thus, data of different standards and recording methods can be managed and processed for each sector.

(Second Embodiment) In the present embodiment, a flag bit is provided.

Hereinafter, the optical disk controller of this embodiment will be described.

For the control code 209 on the memory map 201 of FIG. 3, a flag bit is provided for each option bit of the data generation code 210, the encoding method code 211, and the subcode generation code 212.

Based on this, when the system controller 105 issues a data generation command, an encode setting command, or the like to the optical disk controller 104 in a sector where the data generation or processing method is switched, the optical disk controller 104 that has received those commands, Set a predetermined flag.

That is, when the data generation command is received, the flag option bit in the data generation method code is set to 1. When the main data encoding setting command is received, the flag option bit in the main data encoding method code is set to 1. In the sector where the subcode generation method and the subcode encoding method change, the system controller 105 sets the flag option bit of the subcode control code to 1. Further, the issuance of these commands and the setting of the flags are performed before the actual recording command.

When these are set, the system controller 105 issues a data reception command to the optical disk controller 104. After buffering to some extent, the system controller 105 issues a recording command to the optical disk controller 104. The optical disk controller 104 that has received the recording command monitors the flag in the control code, and
When a sector set to "1" is detected, a control code in which this flag is set to 1 is obtained, and data generation and encoding are performed according to the control code. And once you get the control code parameters,
The flag is set to 0. That is, the flag is dropped.

In this case, the flag is always set to 1 for the first sector at the start of recording. Thereafter, data generation and encoding can be performed by the same method up to the sector in which the flag is set to 1.

However, separate processing may be performed. First, the header information of the CD-ROM needs to increment the address information for each sector. For this reason, the header is incremented with respect to the initial value at every processing of one sector.
And the microcontrol unit 107 built in the optical disk controller 104 calculates up to the sector for which the flag is set to 1 thereafter.

The standard for calculating the EDC differs depending on the mode of the CD-ROM. When the EDC calculation is necessary, the optical disk controller 104 obtains MODE1, MODE2, MODE2 XA from the header and subheader.
FORM1, MODE2 XA FORM2 is determined,
The EDC is calculated in accordance with each standard and written to a predetermined address on the memory map.

Similarly, the ECC parity is calculated according to the standard and written to a predetermined address on the memory map.

In the case of a CD-ROM, the above-mentioned CD-RO
M encoding is performed, and the data is transferred to the CD encoder.

These processes need to be performed on a sector-by-sector basis. If the data generation or encoding method does not change for each sector, the control code can be obtained without changing the control code for each sector. That is, the same processing method can be performed up to the sector in which the flag is set to 1, which leads to an improvement in the processing capability of the optical disk controller.

As can be seen from the above description, in the present embodiment, it is determined whether or not to access the control code by providing a flag in the control code. As a result, unnecessary access is eliminated. It is possible to increase the speed of the optical disk controller.

(Third Embodiment) This embodiment relates to handling of a buffer empty state.

Hereinafter, the optical disk controller of this embodiment will be described.

In the first embodiment, data can be generated when an underrun occurs.

When an underrun occurs, the buffer is in an empty state, and data to be recorded on the optical disk 101 cannot be received from the host PC 106.
There is a free space on M112. In this embodiment, the occurrence of the underrun itself is detected by the recording pointer catching up with the host system pointer. And if you leave this as it is and stop recording,
A read error occurs and reading cannot be performed at all. Therefore, the LIN is stored in the memory map 201 in advance.
A buffer 203 for generating data such as K, RUN-IN, RUN-OUT, and gap is provided. In this area, the system controller 105 records user data when an underrun occurs in advance. In this area, arbitrary data can be recorded from the system controller 105. In addition, the general-purpose bus controller of the optical disk controller 104 and the DMA 108 can perform memory copy without using the microcontroller 107.

Therefore, the optical disk controller 104
Detects an underrun and copies the user data from the area specified by the system controller 105 to the sector currently being processed in memory, thereby avoiding the buffer empty state. By the above operation, the number of recording sectors requested by the host PC 106 is recorded without interruption, and as a result, data up to the occurrence of underrun can be read at a minimum.

Although the present invention has been described based on some embodiments, it is needless to say that the present invention is not limited to these embodiments. That is, for example, the following may be performed. 1) Two flags are set to 0 if the standard or the like changes.
To be substantially the same. 2) The data to be recorded is
It is sent from something other than a personal computer. 3) In the subcode area of the present embodiment, the memory map of the conventional ODC uses the area for storing a flag for error correction at the time of reproduction as 275.
6480 pages / page, 2480B / page
/ Page, but this is another value.

[0076]

As can be seen from the above description, according to the present invention, when recording data having different standards and recording methods, the memory map is set in sector units, and the control code is stored in one page in addition to the main data and subcode data. Then, processing is performed in sector units using this control code. For this reason, recording can be performed without interruption by one operation.

Further, a flag is provided in the control code so that the parameter is acquired in a page having a different standard and recording method and the processing method is changed, so that unnecessary parameter access is eliminated and the recording can be speeded up.

Even when an underrun occurs, the data up to that time can be read at a minimum.

[Brief description of the drawings]

FIG. 1 is a diagram showing command transmission / reception between a conventional system controller and an optical disk controller.

FIG. 2 is a configuration diagram of an optical disk recording device according to an embodiment of the present invention.

FIG. 3 is a diagram showing a memory map of the optical disk controller according to the embodiment of the present invention.

FIG. 4 is a diagram showing command transfer between a system controller and an optical disk controller according to the embodiment of the present invention.

[Explanation of symbols]

Reference Signs List 101 optical disk 102 pickup 103 laser controller 104 optical disk controller 105 system controller 106 host PC 107 micro control unit 108 bus controller and DMA 109 ATIP (Absolute Time In)
Pre-groove) 110 Write strategy 111 CD encoder 112 DRAM 113 Host interface 201 Memory map 202 Ring buffer 203 Data generation buffer 204 Subcode table 205 One page memory map 206 Main data (2352B) 207 Subcode PW data (96B) 208 Subcode PQ data (16B) 209 Control code 210 Data generation code 211 Encoding method code 212 Subcode generation code 301 Command issue 302 Termination interrupt

Claims (9)

[Claims] An optical disk having an optical disk and a buffer for temporarily storing data for encoding prior to recording data on the optical disk, and recording data of different standards and recording methods under control by issuing a command from a system controller. In the recording apparatus, all the data sent from the host PC is buffered in the buffer in sector units in accordance with a memory map for encoding, and the data to be buffered as a control code using the standard and the recording method. An optical disc controller comprising: recording control means for storing data in a sector unit at a position matched with the above; and encoding means for encoding the buffered data in accordance with the control code before recording the data on the optical disc. 2. The apparatus according to claim 1, wherein the buffer is a DRAM having a buffering area and a data generation area, into which arbitrary data can be written, and the encoding means receives an underrun notification from the system controller. 2. The memory according to claim 1, further comprising memory copy means for copying the data in the data generation area to a buffering area and writing the data in the DRAM when the data is generated.
An optical disk controller as described. 3. The recording device according to claim 1, wherein, once the recording is started, the control means refers to the control code for encoding the data having different standards and recording methods by referring to the control code so as to process the data in a sector unit without stopping the operation. 3. The optical disk controller according to claim 2, wherein the controller is an encoding unit. 4. The encoding means according to claim 1, wherein said encoding means comprises:
calculation means for processing the ader data and SubHeader data by the built-in microprocessor, and DM to the EDC calculation circuit and the syndrome calculation circuit.
A small transfer means for performing A transfer, a built-in microprocessor for calculating EDC and ECC parity from operation results, and a small CD encode transfer means for transferring data to a CIRC encoding circuit and an EFM modulation circuit. 4. The optical disk controller according to claim 1, 2 or 3. 5. The system controller is a system controller compliant with various standards and methods for recognizing the standards and methods of data to be recorded on an optical disc. Therefore, data of different standards and recording methods are continuously recorded in sector units. 5. A command issuing control unit for issuing a command to each unit such as the storage control unit and the encoding unit for recording by recording. Optical disk controller. 6. The storage control means, when storing information on a standard and a recording method as a control code together with data to be recorded on an optical disc in the DRAM, converts the data and the control code into sector units.
6. The optical disk controller according to claim 2, further comprising a flag unit storage management means for managing on the AM. 7. The recording control means, when a recording method setting command for changing a standard and a recording method is issued from the system controller, recognizes the command and sets a recording method change flag in the control code. During the recording operation, when the flag is set, a new standard and a recording method are obtained from the control code when the flag is set. 7. A flag reference processing sub-means for performing a process, and a flag deletion sub-means for lowering a flag after obtaining a parameter.
An optical disk controller as described. 8. The encoding means performs command issuance from the system controller and encodes in accordance with the control code, and is a different-method-compatible encoding means that responds to a different standard method by issuing a recording command once. 8. The optical disk controller according to claim 5, wherein the optical disk controller is an optical disk controller. 9. The system controller according to claim 1, wherein when the underrun occurs, the system controller detects the occurrence of the underrun and causes the recording control means to copy arbitrary data from a data generation area prepared in advance in a recording area to be continued in the buffer empty state. 6. A buffer empty avoiding means for avoiding the above problem.
An optical disk controller according to claim 6, 7, or 8.