KR20020072679A - Writing method for high density data writing on optical recordable media - Google Patents

Abstract

PURPOSE: A high density data recording method for an optical medium is provided to correct the ID and MSF parts of a data frame properly for the high density recording for overcoming the absolute time processing limit of the CD-R/RW recording medium. CONSTITUTION: A high density data recording method for an optical medium includes the steps of selecting low or high density recording, carrying out the data recording according to the CD recording method according to the selection, and carrying out the high density data recording including the data recognition indications and absolute time information when the high density recording is selected, wherein the data recognition indications are the sector number assigned to two physical sectors corresponding to one ATIP(Absolute Time In Pre-groove) frame recorded together with area type and data type in the ID, and the absolute time information is the absolute time information such as minutes, seconds, and frames(MSF) of the ATIP equally recorded in three bites in the MSF part or the absolute time conversion information of the ATIP.

Description

High density data recording method of optical recording medium {WRITING METHOD FOR HIGH DENSITY DATA WRITING ON OPTICAL RECORDABLE MEDIA}

The present invention relates to a data structure and a recording method thereof for recording data at high density on an optical recording medium.

In particular, the present invention provides a high-density recording data format of an optical recording medium that facilitates high-density recording and reproducing by applying a DVD data frame structure when user data is to be recorded at high density on a CD-R / RW disc. ).

A CD-RW drive is a device connected to a PC that reads and stores data on the CD-RW. The CD drive can generally read data recorded on CD-type discs (CD-ROM, CD-AUDIO) and record data on a disc (CD-R) (CD-RW). In particular, CD-R can only be written once, but CD-RW can be rewritten many times. Each disc complies with the standard format of the CD family (as defined in redbooks, yellowbooks, etc.), making it compatible to read from CD-ROM drives, CD-R drives, and CD-RW drives.

Standards for CD-R and CD-RW are specified in the Orange Book. Due to the compatibility and high recording capacity of CD-ROM drives, CD-R / RWs are in the spotlight as the main data storage devices of PCs. Especially, CD-RWs are getting more and more attention due to their rewrite characteristics.

In the case of CD-R and CD-RW discs, grooves in the form of land grooves are formed along the surface of the recording track, and data is recorded along the surface during data recording. Unlike CDs that can write, read-only discs cannot use pit trains already recorded during initial recording or overwrite as information for tracking servos, focus servos, and linear velocity control (CLV) servos. Land grooves store absolute position information and some disk information, called ATIP (Absoulte Time In Pre-groove), using a physical encoding method called wobble, which realizes servo control using ATIP. It is used as an absolute position to synchronize with the address of the sector actually recorded. That is, since the absolute position is determined, recording / reproducing at any position is possible by using the ATIP address.

Data storage space on a disk can be thought of as a contiguous set of structures called contiguous sectors (= Frames). One sector can store approximately 2048 bytes of information. Each sector is addressed (addressed) so that it can be located directly. CD systems use an addressing method called MSF (Min, Sec, Frame). One second is 75 sectors (Frame), and one minute is 60 seconds. That is, one frame means one sector. There is an area in the sector that retains its own address information, which is called a sub-queue (SUB-Q). In the CD-R, CD-RW system, the address of the MSF recorded in the SUB-Q is recorded so as to match the ATIP address of the position. The data storage space consisting of several sectors is divided into lead-in, program and lead-out areas. In the CD-R and CD-RW systems, the PMA area and the PC (in front of the first lead-in) are divided. PCA) region and the like.

The lead-in area is an area in front of the program area, and is provided with a data structure called TOC (TOC). In this TOC, information on tracks recorded in the program area is recorded. Recognize the existence of these people and find their location.

The program area is an area capable of storing actual meaningful data and is composed of one or more track areas. That is, there may be several tracks in the program area. In the case of an audio-CD, typically one song is stored in one track.

The lead-out area is a spare area outside the program.

The lead-in area, program area, and lead-out area are collectively called a session. Multiple sessions can be established on one disk, which is called multisession.

The starting position of the program area of the first session is physically defined. The data space after 0: 0: 0 is addressed incrementally by 1 in the MSF address, and the front area is decreased by 1 in the direction of the first lead-in. It is addressed in the form. The last address of the first lead-in is typically 99:59:74.

The PMA area exists only in the recording CD system, and is used to store the recorded track information because one session can be recorded in track units. For example, if you record a track and then eject the disc without creating a session, there is no way to verify the existence of the track on the disc. For this reason, PMA is necessary. Information is added to the PMA area each time a track is recorded, and the start and end position information of the track is stored in this PMA entry.

A typical recording method for a disc is as follows.

If only an additional recording method is allowed from the beginning of the disc, the track cannot be recorded at an arbitrary position. In the case of a reserved track, even if the information is not recorded in its entirety, it can be recorded in the next track, and the session can be recorded later. However, in order for a session to be closed, all tracks in the session must be recorded and incomplete tracks must be closed. When the session is closed, the location information of the program area of the next session is recorded in the lead-in so that the next session can be found quickly. If you do not create a pointer to the next session, the disk becomes a disk that can no longer be written to. In the case of a CD-RW, since rewriting is possible, the entire recorded track can be overwritten, but it is impossible to change the track length arbitrarily. Therefore, in the case of rewriting, the entire disc must be rewritten.

As mentioned above, CDs, CD-ROMs, CD-Vs and the like have become very successful media for storing audio, MPEG video and many other digital information. However, 680 Mbytes of storage capacity is insufficient for storing graphics-centric computer applications and high-definition digital video programs. DVD, which is considered to be an extension of the CD series, is a new optical recording medium with a storage capacity of seven times more than a normal CD. Usually, the increase in storage capacity has been improved by the quality improvement of the light source and the objective lens. In addition, the increase in the storage capacity of DVDs is due to the complete redesign of the disc's logical format using the more powerful recording codes RS-PC and EFMPlus.

This RS-PC ECC and 8/16 modulation code allows for the recording of more capacity than conventional CD encoding when recording the same sized user data onto a CD-R / RW recording medium.

The present invention proposes a data frame structure for recording data at high density onto an existing CD-R / RW disc as a high density recording method of an optical recording medium.

The present invention proposes a method for recording data at a high density and a low density on a single disk, and a data frame structure therefor.

The present invention proposes a method of recording data by using a data frame structure for low density recording and a data frame structure for high density recording on an optical recording medium, and a data frame structure therefor.

The present invention provides a high-density recording of 2048 bytes of user data on a CD-R / RW disc using RS-PC ECC and 8/16 modulation code or a modulation code having a similar code rate. By changing the ID and MSF part, the optical recording medium can be used as information to overcome the absolute time processing limit of existing CD-R / RW recording media and to make high-density recording and playback easier when increasing the storage capacity. We propose a data frame structure and a method thereof.

The present invention is a high density recording method for an optical recording medium, wherein the low density data recording method is based on the existing CD recording method, and the high density data recording method is based on the recording method based on the frame data of the new structure in which the ID and the MSF part are changed. The present invention proposes a high density recording method and a data structure of an optical recording medium characterized by having data recognition mark and absolute time information in main data for high density data recording, and having a total size of 2048 bytes.

1 is a diagram showing the structure of a data frame of an optical recording medium according to the present invention;

Fig. 2 is a diagram showing the ID structure of the optical recording medium according to the present invention.

Fig. 3 shows the MSF structure of the optical recording medium according to the present invention.

The frame data structure for recording high density data of the optical recording medium of the present invention and the recording method thereof include two physical sectors in one ATIP frame of a CD-R / RW disc in the sector number of the ID in the DVD data frame structure. A sector number is recorded so as to correspond to a physical sector, and frame data including this information is recorded.

In addition, the frame data structure and the recording method thereof for high-density data recording of the optical recording medium of the present invention allocate the area tie type and data type information to the sector information of the ID in the DVD data frame structure. And frame data including this information.

In addition, a frame data structure for recording high density data of an optical recording medium of the present invention and a recording method thereof include a 6-byte MSF portion of a DVD data frame structure in minutes, seconds, and frames of absolute time information of ATIP. frames) information equally recorded in three bytes, or the absolute time conversion information of the ATIP is recorded, and the remaining three bytes are reserved.

In addition, the frame data structure for recording high density data of the optical recording medium and the recording method thereof according to the present invention are characterized in that two physical sectors having the same MSF information exist in the DVD data frame structure and are recorded corresponding to the same ATIP frame. A high density recording method of an optical recording medium and its data structure.

1 shows a structure of a data frame for explaining the present invention.

12 rows of data, including 4 bytes of ID, 2 bytes of IED, 6 bytes of MSF, 160 bytes of main data, and 172 bytes of main data 10rows, 168 bytes of main data, and 4 bytes of EDC. It shows what constitutes a frame.

In the present invention, as described above, 2048 bytes of user data are used on a CD-R / RW disc using high-density (2% of existing capacity) using RS-PC ECC and 8/16 modulated codes (including modulated codes having similar code rates). Since a data frame for recording data is proposed, the ID and MSF portions of the data frame structure of FIG. 1 are changed as follows.

First, the 4-byte ID (b0-b31) includes a sector information (b24-b31) and a sector number (bector-b23), as shown in FIG. The sector number is recorded so that two physical sectors correspond to the 1ATIP frame of the CD-R / W disc. In other words, it is designed to cope with recording of double capacity on an existing CD-R / RW disc, thereby making it possible to compensate for the lack of absolute time recording (processing over 99 minutes).

Area type b26 and b27 and data type b25 information are allocated to the sector information b24-b31 of the ID.

That is, bit 27 (b27) and bit 26 (b26) allocate an area type, where 00b is a data area, 01b is a lead-in area, 10b is a lead-out area, 11b Is reserved and defined as reserved, and bit 25 (b25) assigns a data type, where 0b is re-recordable data, and 1b is defined and assigned as linking data.

In this way, the ID of the data frame is corrected, and the six-byte MSF portion b0-b47 is processed as shown in FIG.

First, the lower 3 bytes (b0-b23) are reserved. Minutes (b47-b40) from the most significant bit, seconds (Seconds) (B39-b32) to the next byte, and then 1 The byte contains three-byte time information of frames (b31-b24). That is, the minute, second, and frame information, which are absolute time information of ATIP, are recorded in the same 3 bytes in the 6-byte MSF part, and the remaining 3 bytes are reserved. Alternatively, the ATIP absolute time conversion information, for example, information obtained by converting the MSF into an ATIP frame number is recorded, and the remaining 3 bytes are reserved. This records the presence of two physical sectors with the same MSF information, which means that they correspond to the same ATIP.

The spare 3 bytes in the MSF structure can be used, for example, for new copyright management.

In the MSF structure of FIG. 3, time information is represented by a BCD, which means that two physical sectors have the same MSF data since one ATIP frame corresponds to two physical sectors.

As described above, when 2048 bytes of user data are recorded at high density on a CD-R / RW disc using RS-PC ECC and 8/16 modulated code, the storage capacity can be obtained by using the data frame structure according to the present invention. In this case, the absolute time processing limitation of the existing CD-R / RW recording medium can be overcome, and information for facilitating high density recording and reproduction can be provided.

The present invention uses the existing CD-R / RW optical recording medium as it is to record data at a high density (double capacity), thereby modifying the ID and MSF portions of the data frame to be suitable for high density recording. It is possible to overcome the limitation of absolute time processing of / RW recording media. It also ensures an environment that enables high-density data recording and playback using existing CD-R / RW discs.

Claims (11)

An optical recording medium characterized by recording data recognition indication and absolute time information for recording high density data in a data frame in a recordable optical recording medium. 2. The optical recording medium according to claim 1, wherein a data recognition mark for recording high density data and absolute time information or a data recognition mark for recording low density data and absolute time information are recorded in a data frame in a recordable optical recording medium. The data recognition indication information is characterized by recording a sector number so that two physical sectors correspond to one ATIP frame of a CD-R / RW disc in the data frame ID sector number. Optical recording media. 3. The optical recording medium according to claim 1 or 2, wherein the data recognition indication information is obtained by allocating area type and data type information to a data frame ID information. The optical recording medium according to claim 1 or 2, wherein the absolute time information is obtained by recording absolute time information of ATIP or recording absolute time conversion information of ATIP in the data frame MSF part. 6. The optical recording medium according to claim 5, wherein the absolute time information or the absolute time conversion information of the ATIP is recorded in the MSF to mean that there are two physical sectors having the same MSF information. 6. The optical recording medium according to claim 5, wherein the absolute time conversion information records information obtained by converting an MSF into an ATIP frame number. In a recordable optical recording medium, a data frame includes a 4-byte ID and a 6-byte MSF, wherein the ID includes a 3-byte sector number and a 1-byte sector information, and the sector number of the ID includes a CD-R. A sector number is recorded so that two physical sectors correspond to one ATIP frame of the / RW disc, and an area type and a data type are recorded in the sector information of the ID, and the area type is allocated with 2 bits so that the data area and lead- Define an in-area, a read-out area, and the data type is allocated to 1 bit to define rewritable data and linking data, and the MSF stores ATIP absolute time information (Minutes, Seconds, Frames) equal to 3 bytes. And recording the cutoff time conversion information of the ATIP and allocating the remaining 3 bytes as a spare. And recording the data recognition indication and the absolute time information for recording the high density data in the data frame of the recordable optical recording medium. 10. The method of claim 9, further comprising: selecting low density recording or high density recording for a recordable optical recording medium, performing data recording according to an existing CD recording method when selecting the low density recording, and recognizing the data when selecting the high density recording. A high density data recording method for an optical recording medium, comprising the steps of performing high density data recording including display and absolute time information. The data recognition mark according to claim 9 or 10, wherein a sector number is recorded in the ID of the data frame so that two physical sectors correspond to one ATIP frame, and an area type and a data type are recorded. An information recording method of high density data in an optical recording medium, characterized in that the absolute time information (Minutes, Seconds, Frames) of ATIP is recorded in three bytes in the MSF portion as the information or the absolute time conversion information of ATIP is recorded.