JP2006260710A - Data recording method, data recording control circuit and data recorder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a data recording method, a data recording control circuit and a data recorder, in which a speed of data transfer to a recording medium can be increased by updating an area control command in real time without generating an interruption of the data transfer, as to such data recording method, data recording control circuit and data recorder that the data to be recorded on the recording medium are once stored on a predetermined area of a storage means together with the area control command and recorded on the recording medium thereafter by reading out the data. <P>SOLUTION: The area control command successively to be outputted and a table having areas storing the area control command are created from the transfer scheduled information preliminarily transferred before starting the transfer of data, so that the area control command is arranged to be stored based on these tables together with the data to be stored in the storage means. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a data recording method, a data recording control circuit, and a data recording apparatus on a recording medium such as an optical disc capable of recording required data.

  Conventionally, as recording media on which data can be written, recording media made of optical disks such as CD-R (Compact Disk-Recordable) and CD-RW (Compact Disk-ReWritable) have been known. In devices that handle large volumes of data, such as TV video recorders, a data recording device capable of recording data on such a recording medium is installed or externally connected, so that required data can be stored or delivered on a disk. Yes.

  In a data recording apparatus that uses a recording medium such as an optical disk, in order to write required data in a continuous recording block of the optical disk, data transferred from a host that performs data transfer control is transferred to SDRAM (Synchronous Dynamic Random Memory) or the like is temporarily recorded and can be edited into an appropriate recording block (for example, see Patent Document 1).

  The storage means is used by being divided into area units. As shown in FIG. 4, each area has a first command area 101 for storing data processing commands and a second command area 102 for storing pointer processing commands. The data area 103 stores necessary data.

  The data processing command defines what processing is to be performed in the corresponding area including data initialization. The pointer processing command defines how to move the pointer before and after the processing of the corresponding area, including interrupt / interrupt processing. Hereinafter, the data processing command and the pointer processing command are collectively referred to as “area control command”.

  Note that when data is stored in each area, the first command area 101 and the second command area 102 need to store required area control commands, but the data transferred from the host has area control. As shown in FIG. 5, before the data is stored in each area, the firmware of the data recording device generates an area control command 202 corresponding to the data 201 transferred from the host, as shown in FIG. Thus, the area control command 202 is stored together with the data 201 in a predetermined area.

  Of the recording media, particularly in the case of a CD-R, a PMA (Program Memory Area) for recording track information, a lead-in area indicating a data recording start position, and necessary data are recorded. Are composed of four data areas, a program area and a lead-out area indicating the data recording end position. The data constituting each area is main data and subcode data. It consists of two. Further, the main data is composed of synchronization signal data, header data, user data, EDC (Error Detecting Code) data, ZERO data, P parity data, and Q parity data.

  In a writing method called DAO (Disc At Once) method and SAO (Session At Once) method for such a CD-R, transfer schedule information called a cue sheet is transferred from the host before the write data is transferred. The data is transferred to the data recording device, and data is written based on the cue sheet.

  Moreover, when data is written by the DAO method, the data transferred from the host may be only the user data in the program area. In such a case, the data recording apparatus requires the data from the cue sheet. Data and an area control command are generated, and the area control command is stored together with the data in a predetermined area of the storage means.

  The cue sheet stores the information of the track / index to be written, and particularly the start time information of each track / index. Therefore, by calculating the difference in the start time between the tracks / indexes. The amount of data to be transferred between each track / index, that is, the number of sectors can be calculated.

  Here, since the data transferred from the host and temporarily stored in the storage means is continuously stored in the storage means, the timing of setting or changing the area control command corresponding to the data cannot be confirmed as it is. An interrupt / interrupt processing instruction is stored in the area control command so that an interrupt / interruption occurs when the area processing ends.

Then, when executing interrupt / interrupt processing, the firmware confirms the end timing of area processing and counts the number of area processing to detect which track / index data the area data is. The control command can be set.
JP 2002-133661 A

  However, when sequential interruption processing is performed in accordance with the end of area processing as described above, there is a problem that the processing speed of data transfer becomes slow.

  In addition, when the required processing is executed by the firmware at the end of the area processing, the data transfer processing speed is restricted by the firmware execution speed and it is difficult to cope with the high speed. Has a problem of high cost and high power consumption because it requires high-performance CPU resources.

  In view of this situation, the present inventors have conducted research and development to increase the speed of data transfer by enabling area control command updates in real time without interruption of data transfer. It has come to make.

  In the data recording method of the present invention, in the data recording method in which the data to be recorded on the recording medium is temporarily stored in a predetermined area of the storage means together with the area control command, and then the data is read and recorded on the recording medium. A table of the area control commands to be sequentially output and the number of areas for storing the area control commands is generated from the transfer schedule information transferred in advance before the start, and the area control commands are stored together with the data to be stored in the storage means based on the table. It was decided to.

  In the data recording method of the present invention, the data to be recorded on the recording medium is temporarily stored together with the area control command in a predetermined area of the storage means, and then the data is read and recorded on the recording medium. A first table of area control commands to be sequentially output is generated from the transfer schedule information transferred in advance before the start of the transfer, and a second table of time information for designating the timing for switching and outputting each area control command. The amount of data generated and stored in the storage unit together with the predetermined area control command is calculated from the time information in the second table, and the area control command is stored together with the data stored in the storage unit.

  In the data recording control circuit of the present invention, in the data recording control circuit configured to temporarily store the data to be recorded on the recording medium together with the area control command in a predetermined area of the storage unit, the data recording control circuit transfers the data before starting the data transfer. A table for storing area control commands to be sequentially output and the number of areas for storing the area control commands, and a command setting unit for storing the area control commands together with data to be stored in the storage unit based on the tables. Provided. Further, the command setting unit is provided with a counter for decrementing the number of areas, and a command update unit for updating the area control command when the value of the counter reaches a predetermined value. is there.

  In the data recording control circuit of the present invention, in the data recording control circuit configured to temporarily store the data to be recorded on the recording medium together with the area control command in a predetermined area of the storage unit, the data recording control circuit transfers the data before starting the data transfer. The first table storing area control commands to be output sequentially from the transfer schedule information, the second table storing time information for specifying the timing for switching and outputting each area control command, and the second table The calculation means for calculating the amount of data stored in the storage means together with the predetermined area control command from the time information in the memory, and the area control command is stored together with the data stored in the storage means based on the calculation result calculated by the calculation means A command setting unit is provided. Further, the command setting unit is provided with a counter for decrementing the calculation result, and a command update unit for updating the area control command when the value of the counter reaches a predetermined value. is there.

  In the data recording apparatus of the present invention, in the data recording apparatus configured to temporarily store the data to be recorded on the recording medium together with the area control command in a predetermined area of the storage means, the transfer transferred in advance before starting the data transfer A table that stores area control commands that are sequentially output from the schedule information and the number of areas that store the area control commands, and a command setting unit that stores the area control commands together with data stored in the storage unit based on the table are provided. .

  In the data recording apparatus of the present invention, the data to be recorded on the recording medium is temporarily stored in the predetermined area of the storage means together with the area control command, and transferred in advance before the data transfer is started. In the second table, a first table storing area control commands to be sequentially output from the transfer schedule information, a second table storing time information for designating timing for switching and outputting each area control command, and the second table. Calculation means for calculating the amount of data stored in the storage means together with a predetermined area control command from the time information, and storing the area control command together with data stored in the storage means based on the calculation result calculated by the calculation means A command setting section was provided.

  According to the first aspect of the present invention, there is provided a data recording method for temporarily storing data to be recorded on a recording medium together with an area control command in a predetermined area of the storage means, and thereafter reading the data and recording the data on the recording medium. A table of area control commands to be sequentially output and the number of areas for storing the area control commands is generated from the transfer schedule information transferred in advance before starting the transfer of the area, and the area control command together with the data to be stored in the storage means based on this table By storing the data, the data can be transferred while updating the area control command in real time, and the data can be transferred without being interrupted, so that the data transfer can be speeded up. In addition, high speed can be achieved even with relatively low CPU resources.

  According to the second aspect of the present invention, in the data recording method for temporarily storing the data to be recorded on the recording medium together with the area control command in a predetermined area of the storage means, and then reading the data and recording it on the recording medium, A first table of area control commands to be sequentially output is generated from the transfer schedule information transferred in advance before the start of the transfer, and a second table of time information for designating the timing for switching and outputting each area control command. Data transfer by generating and calculating the amount of data stored in the storage means together with the predetermined area control command from the time information in this second table and storing the area control command together with the data stored in the storage means In addition to speeding up the process, it automatically calculates the amount of data It is possible to reduce the time to start the transfer by Ukoto.

  According to the third aspect of the present invention, in the data recording control circuit configured to temporarily store the data to be recorded on the recording medium together with the area control command in a predetermined area of the storage means, the data is transferred in advance before the data transfer is started. A table that stores area control commands that are sequentially output from the transfer schedule information and the number of areas that store the area control commands, and a command setting unit that stores the area control commands together with the data stored in the storage means based on this table are provided. As a result, the data can be transferred while updating the area control command in real time, and the data can be transferred without being interrupted, so that the data transfer can be speeded up. In addition, high speed can be achieved even with relatively low CPU resources.

  According to a fourth aspect of the present invention, in the data recording control circuit according to the third aspect, the command setting unit is provided with a counter for decrementing the number of areas, and the area when the counter value reaches a predetermined value. By providing the command update unit for updating the control command, the area control command can be reliably updated.

  According to the fifth aspect of the present invention, in the data recording control circuit configured to temporarily store the data to be recorded on the recording medium together with the area control command in a predetermined area of the storage means, the data is transferred in advance before starting the data transfer. In the second table, a first table storing area control commands to be sequentially output from the transfer schedule information, a second table storing time information for designating timing for switching and outputting each area control command, and the second table. Calculation means for calculating the amount of data stored in the storage means together with a predetermined area control command from the time information, and storing the area control command together with data stored in the storage means based on the calculation result calculated by the calculation means By providing a command setting unit, data transfer speed can be increased. Only Not, it is possible to shorten the time until the start transfer by automatically calculates the amount of predetermined data.

  According to a sixth aspect of the present invention, in the data recording control circuit according to the fifth aspect, the command setting unit is provided with a counter for decrementing the calculation result, and the area when the value of the counter reaches a predetermined value. By providing the command update unit for updating the control command, the area control command can be reliably updated.

  According to the seventh aspect of the present invention, in the data recording apparatus configured to temporarily store the data to be recorded on the recording medium together with the area control command in a predetermined area of the storage means, the transfer that has been transferred in advance before the start of the data transfer A table that stores area control commands that are sequentially output from the schedule information and the number of areas that store the area control commands, and a command setting unit that stores the area control commands together with data stored in the storage unit based on the table are provided. As a result, it is possible to provide a data recording apparatus that enables high-speed data transfer.

  According to the eighth aspect of the invention, in the data recording control apparatus configured to temporarily store the data to be recorded on the recording medium together with the area control command in a predetermined area of the storage means, the data is transferred in advance before the data transfer is started. In the second table, a first table storing area control commands to be sequentially output from the transfer schedule information, a second table storing time information for designating timing for switching and outputting each area control command, and the second table. Calculation means for calculating the amount of data stored in the storage means together with a predetermined area control command from the time information, and storing the area control command together with data stored in the storage means based on the calculation result calculated by the calculation means Data recording that enables high-speed data transfer by providing a command setting section It may be possible to provide a device.

  In the data recording method, the data recording control circuit, and the data recording apparatus of the present invention, the data to be recorded on the recording medium is temporarily stored together with the area control command in a predetermined area of the storage means, and then the data is read and recorded on the recording medium A data recording method, a data recording control circuit, and a data recording device for recording in a table of area control commands to be sequentially output using the transfer schedule information transferred in advance before the start of data transfer; The area control command is stored together with the data stored in the storage means based on this table.

  In particular, when generating a table of area control commands, an area control command update timing is generated by counting the number of areas by generating a table with the area control command and the number of areas storing the area control command as a set. Therefore, it is possible to transfer data while updating the area control command in real time.

  In addition, since the data can be transferred without interruption in the middle as in the conventional data transfer, the data transfer speed can be increased. Furthermore, since processing by firmware can be made unnecessary, it is possible to increase the speed very easily even with relatively low CPU resources.

  Alternatively, when generating a table of area control commands, a second table of time information for designating the timing for switching and outputting each area control command is generated, and a predetermined area is determined from the time information in the second table. When the amount of data stored in the storage means together with the control command is calculated, the data can be transferred without interruption in the middle as in the conventional data transfer, so that the data transfer can be speeded up. In addition, by automatically calculating the amount of predetermined data, it is possible to shorten the time until the start of data transfer, and to further increase the speed of the data transfer process.

  Naturally, the data can be transferred while updating the area control command in real time, and the processing by the firmware can be eliminated. Therefore, the high speed can be increased very easily even with a relatively low CPU resource.

  Here, the second table can be used as a table by storing the transfer schedule information in the storage means.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram of a data recording control circuit 10 in the data recording apparatus of the first embodiment.

  The data recording control circuit 10 adds a required area control command to the data HD transferred from the host as will be described later, and the area control command and the data HD are composed of SDRAM (Synchronous Dynamic Random Memory) or the like. The information is once recorded in the memory M as the storage means, and the area control command and the data HD stored in the memory are sequentially read out and can be recorded on a required recording medium.

  In particular, in the present embodiment, when transferring data, the transfer schedule information called a cue sheet is recorded on a recording medium in a form in which the information is transferred in advance. Specifically, the recording medium is a CD-R (Compact Disk- Recordable) or CD-RW (Compact Disk-ReWritable).

  A part of the memory M is used as a ring buffer. The memory M stores an area control command and data HD in a required area of the memory M, and stores transfer schedule information transferred in advance. In addition, in the present embodiment, information including area control commands to be sequentially output based on the transfer schedule information transferred in advance and the number of areas for storing the area control commands is set as a table T in a required area of the memory M. I remember it.

  The start address in the table T is set in advance, and data for the table T is stored from this start address portion.

  The data recording control circuit 10 stores the area control command and counts the number of storages, and stores the required area control command and information on the number of areas for storing the area control command in the command setting unit 11. The command update unit 12 to be executed, the adder 13 for adding the area control command stored in the command setting unit 11 to the data HD transferred from the host, the required area control command from the table T and the area control command are stored. And a data access controller 14 that controls reading of information on the number of areas to be processed.

  The command setting unit 11 stores a command register 11a that stores an area control command read by the data access controller 14, and the number of areas of a predetermined area control command read by the data access controller 14 and is transferred from the host. In addition, a counter 11b is provided for performing a decrement process along with the transfer of the data HD.

  The command updating unit 12 is provided with a next address register 12a that stores address information to be read by the data access controller 14, and an end address register 12b that stores final address information of reading.

  In the next address register 12a, the start address of the table T described above is first recorded, and when the counter 11b of the command setting unit 11 becomes “0”, it is updated to the address of the table T to be read next. The data access controller 14 is made to read the next area control command and the number of areas for storing the area control command.

  When the address from which the data access controller 14 performs reading exceeds the address stored in the end address register 12b, the reading instruction is not output to the data access controller 14.

  As described above, the data recording control circuit 10 uses the table T generated from the transfer schedule information to store the required area control command together with the data HD transferred from the host in the required address of the memory M in real time. And transfer speed can be increased.

  In the data recording control circuit 10 of the present embodiment, when the table T is stored in the memory M in advance, it is necessary to calculate the number of areas for storing a required area control command, and it takes a lot of time to generate the table T. May be required.

  Therefore, in the data recording apparatus having the data recording control circuit 20 of the second embodiment shown in FIG. 2, only the area control commands sequentially output from the transfer schedule information transferred in advance are stored in the memory M as the first table t1. At the same time, time information specifying the timing for switching and outputting each area control command is stored as the second table t2, and the first table t1 and the second table t2 are generated.

  Here, the second table may store only time information for designating the timing of switching and outputting each area control command, or may store transfer schedule information including the time information as it is. . When the second table stores the transfer schedule information as it is, by reading out the data at the required address by masking and reading other than the time information part that specifies the timing to switch and output each area control command, The required time information can be easily read out.

  The data recording control circuit 20 according to the second embodiment also stores a command setting unit 21 that stores an area control command and counts the number of storages, and commands a required area control command and information on the number of areas in which the area control command is stored. Command updating unit 22 to be stored in the setting unit 21, an adder 23 for adding the area control command stored in the command setting unit 21 to the data HD transferred from the host, and reading of the required area control command from the table t1 And the number of areas for storing the area control command by calculating the number of sectors from the time information specifying the switching timing of the required area control command read from the table t2. The sector number calculator 30 is provided.

  The command setting unit 21 stores a command register 21a that stores an area control command read by the data access controller 14, and the number of areas based on the number of sectors calculated by the number-of-sectors calculator 30 and is transferred from the host A counter 21b is provided for decrementing the data HD when it is transferred.

  The command update unit 22 is provided with a next address register 22a that stores address information to be read by the data access controller 24 and an end address register 22b that stores final address information of reading.

  In the next address register 22a, the start addresses of the first table t1 and the second table t2 described above are first recorded. When the counter 21b of the command setting unit 21 becomes “0”, each read is performed next. The addresses are updated to the addresses of the tables t1 and t2, and the data access controller 24 and the sector number calculator 30 are made to read the next area control command and time information.

  Note that if the address to which the data access controller 24 or the sector number calculator 30 reads exceeds the address stored in the end address register 22b, a read command is output to the data access controller 24 and the sector number calculator 30. Do not do.

  As shown in FIG. 3, the sector number calculator 30 stores time information designating the switching timing of a required area control command read from the second table t2 of the memory M, that is, a track / index for storing track / index information. The information storage unit 31, the address determination unit 32 for determining whether or not the data stored in the track / index information storage unit 31 is the track / index information, and the data stored in the track / index information storage unit 31 are stored in the program area A track determination unit 33 for determining whether the track is a first track information, a first time information storage unit 34 for converting the data stored in the track / index information storage unit 31 into time information and storing it, and the first time information storage A second time information storage unit 36 for storing the previous time information stored in the unit 34, and the second time information. A difference calculator 35 that calculates the number of sectors from the difference between the storage unit 36 and the first time information storage unit 34, and a read control unit that controls reading of data from the second table t2 based on an input from the command update unit 22 It consists of 37 and.

  In the address determination unit 32, when the data stored in the track / index information storage unit 31 is not the track / index information output, the read control unit 37 is made to perform the required reading again. In other words, the transfer schedule information may include not only the track / index information but also information (ISRC) to be inserted into the track, so that information other than such track / index information can be excluded. Yes.

  When the data stored in the track / index information storage unit 31 indicates the lead-in area, the track determination unit 33 causes the read control unit 37 to perform the required reading again, and the read If it indicates an out area, the read control unit 37 stops processing.

  The difference calculator 35 uses the sector information calculated based on the difference between the time information stored in the first time information storage unit 34 and the second time information storage unit 36 as the area number information of the area control command. It is for letting 21b input.

  The second time information storage unit 36 stores the time information stored in the first time information storage unit 34 after the calculation of the number of sectors in the difference calculator 35 is completed.

  The read control unit 37 is provided with a next address register that stores address information to be read and an end address register that stores final address information of the read. In the next address register, the start address of the second table t2 is recorded in advance, and the address information is sequentially updated as data is read.

  In particular, at the start of reading the second table t2, the time information required by the difference calculator 35 is not stored in the second time information storage unit 36, so that the calculation by the difference calculator 35 is impossible. It has become. Therefore, the read control unit 37 stores the time information in the second time information storage unit 36 by performing data access twice at the start of reading of the second table t2, and can calculate the normal number of sectors. Yes.

  By using the data recording control circuit 20 having the sector number calculator 30 configured as described above, the time required before the transfer of the data HD transferred from the host can be reduced, and the data is quickly transferred from the host. Since data HD transfer can be started, transfer efficiency can be greatly improved.

  As described above, the sector number calculator 30 can be used to calculate the number of sectors between predetermined tracks / indexes. However, in general, another sector for initializing the relative time is used in the first sector of a track. In this case, when the track number changes, it is necessary to insert an area control command that differs only by the first sector.

  Therefore, the track determination unit 33 of the sector number calculator 30 has a track number storage means for storing the previous track number, and an update control for making an update request to the data access controller 24 when the track number changes. By providing the means, it is possible to cope with an area control command for relative time included in the transfer schedule information.

It is explanatory drawing of the data recording control circuit of 1st Embodiment. It is explanatory drawing of the data recording control circuit of 2nd Embodiment. It is explanatory drawing of the sector number calculating apparatus of the data recording control circuit of 1st Embodiment. It is explanatory drawing of the area structure of a memory | storage means. It is explanatory drawing of the incorporation form of an area control command.

Explanation of symbols

M memory
Data T table transferred from HD host
t1 1st table
t2 2nd table
10,20 Data recording control circuit
11,21 Command setting section
11a, 21a Command register
11b, 21b counter
12,22 Command update part
12a, 22a Next address register
12b, 22b End address register
13,23 Adder
14,24 Data access controller
30 Sector number calculator

Claims (8)

In a data recording method for temporarily storing data to be recorded on a recording medium together with an area control command in a predetermined area of a storage unit, and then reading the data and recording it on the recording medium.
Data to be stored in the storage means based on the area control command to be sequentially output and the number of areas for storing the area control command are generated from the transfer schedule information transferred in advance before the data transfer is started. A data recording method characterized by storing the area control command. In a data recording method for temporarily storing data to be recorded on a recording medium together with an area control command in a predetermined area of a storage unit, and then reading the data and recording it on the recording medium.
The first table of the area control commands to be sequentially output is generated from the transfer schedule information transferred in advance before the start of the data transfer, and the time information specifying the timing for switching and outputting each area control command 2 table,
The amount of data stored in the storage unit together with the predetermined area control command is calculated from the time information in the second table, and the area control command is stored together with the data stored in the storage unit. Data recording method. In a data recording control circuit configured to temporarily store data to be recorded on a recording medium together with an area control command in a predetermined area of the storage means,
From the transfer schedule information transferred in advance before the start of the transfer of data, a table storing the area control command to be sequentially output and the number of areas for storing the area control command,
A data recording control circuit comprising a command setting unit for storing the area control command together with data stored in the storage means based on the table. The command setting unit includes a counter for decrementing the number of areas,
4. The data recording control circuit according to claim 3, further comprising a command update unit that updates the area control command when the value of the counter reaches a predetermined value. In a data recording control circuit configured to temporarily store data to be recorded on a recording medium together with an area control command in a predetermined area of the storage means,
A first table storing the area control commands to be sequentially output from the transfer schedule information transferred in advance before the transfer of the data;
A second table storing time information for designating timing for switching and outputting each area control command;
Calculating means for calculating the amount of data stored in the storage means together with the predetermined area control command from the time information in the second table;
A data recording control circuit comprising a command setting unit for storing the area control command together with data stored in the storage unit based on a calculation result calculated by the calculation unit. The command setting unit includes a counter for decrementing the calculation result,
6. The data recording control circuit according to claim 5, further comprising a command update unit that updates the area control command when the value of the counter reaches a predetermined value. In a data recording apparatus configured to temporarily store data to be recorded on a recording medium together with an area control command in a predetermined area of the storage means,
From the transfer schedule information transferred in advance before the start of the transfer of data, a table storing the area control command to be sequentially output and the number of areas for storing the area control command,
A data recording apparatus comprising a command setting unit for storing the area control command together with data stored in the storage means based on the table. In a data recording control device configured to temporarily store data to be recorded on a recording medium together with an area control command in a predetermined area of the storage means,
A first table storing the area control commands to be sequentially output from the transfer schedule information transferred in advance before the transfer of the data;
A second table storing time information for designating timing for switching and outputting each area control command;
Calculating means for calculating the amount of data stored in the storage means together with the predetermined area control command from the time information in the second table;
A data recording apparatus comprising: a command setting unit that stores the area control command together with data stored in the storage unit based on a calculation result calculated by the calculation unit.

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