KR20040077225A - Optical recording medium of recording data identification information upon record-ending, method for recording data identification information and data and method therefor - Google Patents

Abstract

PURPOSE: A data recording device is provided to update obtained data identifier information in every access unit, and to record data identifier information of a next access unit in a predetermined position when a recording process is completed, thereby always maintaining the continuity of an ID. CONSTITUTION: A buffer memory(20) stores data to be recorded in ECC(Error Correction Code) block unit, which is read from a disk. The first register(21) stores the first sector data to be modulated. Data identifier information of a next access unit is obtained from data identifier information of a current access unit, and the obtained data identifier information is updated in every access unit. When a recording process is completed, the updated data identifier information is recorded in a predetermined position.

Description

Optical recording medium of recording data identification information upon record-ending, method for recording data identification information and data and method therefor}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of recording accurate data identification information on an optical recording medium, and more particularly, to an optical recording medium, data identification information, and a data recording method and apparatus for recording data identification information at the end of recording.

In case of Digital Versatile Disc Re-recordable (DVD-RW) among optical recording media, the basic recording unit is a physical identifier (PID) area or buffer (such as a DVD-RAM (Random Access Memory)) according to the precise control of the spindle motor. It is necessary to precisely start the recording start point of each basic unit because it is continuously divided without being divided into a free area allocated to overcome the constraint. Here, the basic recording unit of the DVD-RAM may be a sector, and the basic recording unit of the DVD-RW may be an Error Correction Code (ECC) block. Typically, one ECC block has 16 sectors.

In the case of DVD-R (Recordable) and DVD-RW having the same physical format, as described above, since the basic recording units are continuous, when the data transmission is momentarily interrupted or new data is subsequently recorded, there is a margin for the next recording start point. It uses a linking scheme that allocates space. That is, in the DVD-R / RW, at the end of recording, an additional 15 to 17 bytes are recorded after the ECC block in which recording is completed. This linking applies to both normal write end or abnormal write end, such as Buffer Under-run (aka Buffer Empty).

However, additionally, 15 to 17 bytes to be recorded include identification information (ID). If this value is recorded incorrectly, incorrect address information may be misused when playing or searching. there was.

Accordingly, an object of the present invention is an optical recording for recording data identification information so as to maintain continuity of data identification information when linking is necessary due to abnormal or normal recording termination when recording data on an optical recording medium in which basic recording units are continuously connected. A medium, data identification information and data recording method and apparatus are provided.

Another object of the present invention is an optical recording medium in which data identification information and other data of the next sector are updated at every sector at the end of recording in order to prevent the case where wrong data identification information is recorded when recording data on a DVD-R / RW. In addition, the present invention provides a data identification information and a data recording method and a device thereof.

1 is a block diagram of a DVD-R / RW recording / playback apparatus to which the present invention is applied;

2 is a block diagram according to an embodiment of a recording apparatus for data identification information and data recording according to the present invention;

3 is a view showing a process in which data identification information is recorded on the optical recording medium at the end of recording according to the present invention.

According to the present invention, the above object is an optical recording medium in which basic recording units divided into a plurality of access units are continuously connected: data identification information of the next access unit from the data identification information of the currently recorded access unit. Obtaining and updating every access unit, and updated at the end of recording, the data identification information of the next access unit is recorded at a predetermined position.

According to another field of the present invention, the above object is a method of continuously recording data information on an optical recording medium in a basic recording unit divided into a predetermined number of access units: data identification of an access unit currently being recorded. Obtaining data identification information of a next access unit from the information; Updating and storing the obtained data identification information of the next access unit in every access unit; And recording the data identification information of the next access unit at the end of the recording in a predetermined position.

According to another field of the present invention, the above object is a device for recording data information on an optical recording medium continuously in a basic recording unit divided into a predetermined number of access units: data of an access unit currently being recorded First storage means for storing the identification information and the data to be recorded; Second storage means for obtaining data identification information of a next access unit from the currently recorded data identification information of an access unit, and updating and storing the obtained next data identification information of an access unit in every access unit; And selecting means for recording the data stored in the first storage means if recording is not to end, and outputting for recording the updated data identification information of the next access unit in a predetermined position if recording is completed. do.

Further, the present invention is an apparatus for continuously recording data information on an optical recording medium in a basic recording unit divided into a predetermined number of access units by a pickup: from the data identification information of the access unit currently being recorded to This is achieved by a recording apparatus including a data processor that obtains data identification information of an access unit, updates it every access unit, and updates at the end of recording to generate data identification information of the next access unit.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a block diagram of a DVD-R / RW recording / reproducing apparatus to which the present invention is applied, wherein 10 is a disc, 11 is a pickup, 12 is an automatic laser power control (ALPC) circuit, and 13 is a high frequency amplifier. (Radio Frequency Amplifier: RF-AMP), 14 is a data processor, 15 is a host interface (I / F), 16 is a host, 17 is a servo processor, 18 is a motor & driver, 19 is a microcomputer .

Referring to FIG. 1, the ALPC circuit 12 controls the laser light amount of the pickup 11 to form a mark and a space corresponding to the data information on the disk 10, and the high frequency amplifier 13 forms the disk 10. Amplifies the fine signal picked up by the pickup 11 from the. The data processor 14 is a block for performing an operation of generating accurate data identification information and other data at the end of recording according to the present invention, and provides modulation data to be recorded to the ALPC circuit 12 at the time of recording, and at the time of reproduction, a high frequency amplifier. The RF signal passed through (13) is input to perform synchronization signal detection, insertion, protection, modulation and demodulation, error correction, and the like, and generate various control signals for the high frequency amplifier 13 and the servo processor 17.

The host interface 15 interfaces the data processor 14 and the host 16, and the servo processor 17 is responsible for various motor control related to the disk 10, and servo control such as tracking and focus. do. The motor & driver 18 performs a function of driving a motor related to the rotation of the disk 10, and the microcomputer 19 controls the overall operation of the recording / reproducing apparatus.

2 is a block diagram according to an embodiment of a recording apparatus for data identification information and data recording according to the present invention, wherein reference numeral 20 is a buffer memory, 21 is a first register, 22 is a second register, and 23 Is a selector that can be implemented as a multiplexer (MUX) as an example, 24 is a modulator, and this configuration can be implemented in the data processor 14 shown in FIG. Other blocks may be configured in the data processor 14, but will be described with reference to hatched blocks for implementing the present invention.

Referring to FIG. 2, the buffer memory 20 stores data to be recorded in units of ECC blocks read out from the disc 10. In addition, the data stored in the buffer memory 20 are data of each sector to which an ID and other data have been scrambled and / or error corrected.

The first register 21 may store one sector data to be modulated for actual writing. For example, if the data of one sector data is composed of 2048 bytes, ID (4 bytes) + IID (ID Error Detection code: 2 bytes) + RSV (Reserved: 6 bytes) + DATA (4 bytes) + MAIN DATA (2044 bytes). In addition, an ECC block may be referred to as a basic recording unit and a sector as an access unit.

The first part (ID + IED + RSV + DATA) of the currently recorded sector is stored in the first register 21, at the same time the ID of the next sector is calculated, and the IED + RSV + DATA is calculated from the calculated ID. 22) Store ID + 1 and other data (IED + RSV + DATA) for linking. ID + 1 and other data stored in the second register 22 are updated each time a sector is written. The selector 23 selects the data stored in the first register 21 when the writing is not finished, and selects the data stored in the second register 22 when the writing is finished and outputs the data to the modulator 24. The modulator 24 modulates the data selected by the selector 23 by a predetermined modulation scheme, and the modulated data output from the modulator 24 is recorded on the actual recording medium.

3 is a view illustrating a process of recording data identification information on an optical recording medium at the end of recording according to the present invention, which will be described with reference to FIG.

As shown in (a) of FIG. 3, the IED and data are calculated from the ID of the next sector calculated by recording the first part of the current sector and calculating the ID of the next sector at the same time. + 1 + IED + RSV + DATA: 31) is stored in the second register 22. Each time a sector is recorded, the second register 22 always updates the ID and other data corresponding to the next sector of the sector currently being recorded. This operation can be performed using only the internal registers of the digital processor 14 without the help of the microcomputer 19. If the writing is finished and linking is necessary, the linking data uses the ID of the next sector and other data 32 stored in the second register 22 updated every sector. Since the second register 22 always contains the next sector ID information of the sector to be recorded normally, the ID always maintains continuity even when abnormal recording ends.

FIG. 3B illustrates an example in which recording ends when the ID is ID + n during recording. When writing the ID + n sector, the second register 22 for linking contains the already scrambled ID + n + 1 value and the corresponding IED and other data (ID + n + 1 + IED + RSV + DATA: 32). It is stored. When the recording is finished after the ID + n sector recording, additionally recording 15 to 17 bytes of data for linking is output from the second register 22 ((ID + n + 1 + IED + RSV), not the buffer 20. + DATA: 32) so that the ID value of ID + n + 1 is recorded so that data identification information is always maintained in a continuum so that an invalid ID value is not recorded.

As described above, the present invention does not need to know the total number of sectors of data to be recorded, and can always maintain the continuity of the ID by updating the ID of the next sector from the current sector which is being recorded, and always corresponds to the recording position. By recording the ID, data at the wrong position is not decoded during playback, and there is no possibility to misjudge the current position even during the search operation, thereby improving the stability and reliability of the system.

Claims (16)

In an optical recording medium in which a basic recording unit divided into a plurality of access units is continuously connected: An optical unit characterized by obtaining the data identification information of the next access unit from the data identification information of the currently recorded access unit and updating it for each access unit, and updating the data identification information of the next access unit at the end of recording. Recording media. The optical recording medium of claim 1, wherein the updated data identification information of the next access unit is recorded at a predetermined position for linking after the basic recording unit in which recording is completed. An optical recording medium in which data information is recorded successively followed by error correction block units divided into a plurality of sectors: The data identification information and other data of the next sector are obtained from the currently-recorded data identification information on a sector-by-sector basis, updated every sector, and at the end of recording, the data identification information and other data of the next sector updated are recorded at a predetermined position. Optical recording medium. 4. The optical recording medium according to claim 3, wherein the data identification information and other data of the updated next sector are recorded at a predetermined position for linking after an error correction block in which recording is finished. A method of continuously recording data information on an optical recording medium in a basic recording unit divided into a predetermined number of access units: Obtaining data identification information of a next access unit from data identification information of an access unit currently recorded; Updating and storing the obtained data identification information of the next access unit in every access unit; And And recording the data identification information of the next access unit updated at the end of the recording in a predetermined position. 6. The recording method as claimed in claim 5, wherein in the recording step, data update information of the updated next access unit is recorded at a predetermined position for linking after the basic recording unit in which recording is completed. A method of continuously recording data information on an optical recording medium successively in units of error correction blocks divided into a predetermined number of sectors: Obtaining data identification information and other data of the next sector from the data identification information of the sector currently being recorded; Updating and storing the obtained data identification information and other data of the next sector every sector; And And recording data identification information and other data of the next sector updated at the end of the recording in a predetermined position. 8. The recording method as claimed in claim 7, wherein in the recording step, the data identification information of the updated next sector is recorded at a predetermined position for linking after the error correction block in which recording is finished. An apparatus for continuously recording data information on an optical recording medium in a basic recording unit divided into a predetermined number of access units: First storage means for storing data identification information of an access unit currently being recorded and data to be recorded; Second storage means for obtaining data identification information of a next access unit from the currently recorded data identification information of an access unit, and updating and storing the obtained next data identification information of an access unit in every access unit; And And recording means for recording the data stored in the first storage means if the recording is not to end, and outputting the data identification information of the updated next access unit to record at a predetermined position when recording is completed. 10. The recording apparatus according to claim 9, wherein the updated data identification information of the next access unit is recorded at a predetermined position for linking after the basic recording unit in which recording is completed. An apparatus for successively recording data information on an optical recording medium in units of error correction blocks divided into a predetermined number of sectors: First storage means for storing data identification information, other data, and main data of a sector currently being recorded; Second storage means for obtaining data identification information and other data of the next sector from the data identification information of the currently recorded sector, and updating and storing the obtained data identification information and other data of the next sector for each sector; And And recording means for recording data stored in the first storage means if the recording is not to end, and outputting for recording the data identification information and other data of the updated next sector in a predetermined position if recording is completed. 12. The recording apparatus according to claim 11, wherein the data identification information of the updated next sector is recorded at a predetermined position for linking after the error correction block in which recording is finished. 12. A recording apparatus according to claim 11, wherein said first and second storage means are comprised of registers. 12. The recording apparatus of claim 11, further comprising a buffer memory in which data of each sector to which an ID and other data are added is stored in an error correction block unit through scramble and / or error correction. An apparatus for continuously recording data information on an optical recording medium in a basic recording unit divided by a predetermined number of access units by a pickup: And a data processor which obtains the data identification information of the next access unit from the data identification information of the currently recorded access unit, updates each access unit, and generates updated data identification information of the next access unit at the end of recording. 16. The recording apparatus according to claim 15, wherein the updated data identification information of the next access unit is recorded at a predetermined position for linking after the basic recording unit in which recording is completed.