CN1258177C - Method for obtaining track-related special information during initialization of optical disc and optical reading device - Google Patents

Abstract

A method for reading track-related special information on an optical storage medium and an optical reading apparatus are provided. The optical storage medium is sequentially provided with a plurality of session areas (sessions), each session area comprising a lead-in area and a plurality of data tracks. The method first moves the optical pick-up head to read the special information related to the track in the target section. When reading the target section, first reading the basic content (TOC) data of the lead-in area in the target section, and then sequentially reading the track related special information in the data track of the target section. After the data tracks of the target section are all read, the optical reading head is moved to the next section to continuously read the special information related to the tracks. If the optical storage medium is recordable or rewritable, it has a program storage area, and if the target section is found to be an unfinished section (Un-closed Session), the optical reading head does not read the lead-in area of the unfinished section, but reads the data in the program storage area for judgment, and jumps directly to the data track in the section to read the track-related special information.

Description

Method for Obtaining Track-related Special Information During Disc Initialization and Optical Reading Device

technical field

The invention relates to a method for reading track-related special information, in particular to a method for reading track-related special information on an optical storage medium.

Background technique

It is known that multiple sections are arranged sequentially on an optical storage medium. Each session contains a lead-in area and multiple data tracks. The data track stores user data and contains the corresponding data track data mode (Data Mode), data packet format (Packet Type: Fixed Packet, VariablePacket), data packet length (Packet Size), and the next writable address (Next WritableAddress, NWA) and other track-related special information.

When an optical storage medium is placed in the optical reading system for initialization, the optical reading system will perform a reading operation on the basic content (table of content, TOC) of each lead-in area of the optical storage medium. Its purpose is to understand the distribution of data on the optical storage medium, and record these TOCs in the memory of the system. When the host (host) side needs to obtain the TOC, the optical reading head of the optical reading system does not need to read again, but directly reads from the memory.

When the host needs to read track-specific information for a particular data track, several ways are known to do so. One way is to use an optical pickup head to seek to a specific data track for reading. This way will cause the optical pickup head to go back and forth unexpectedly to different specific data tracks to read track-specific information.

Another known way for the host to read the track-related specific information of a specific data track is to sequentially read each data track in each section from the beginning after reading the basic content of each lead-in area on the optical storage medium , to obtain the track-related special information on the data track and store it in the memory. The host reads directly from the memory to avoid having to seek to a specific data track for reading by the optical read head.

Although, when the host needs specific data track data, it can be read directly from the memory, so that the optical pick-up head reduces the tracking time, but it is necessary to read the track-related special information of each data track from the head and The time required to store it in the memory causes a problem that the initialization time of the system is lengthy.

Contents of the invention

The object of the present invention is to provide a method for reading track-related special information on an optical storage medium, so as to effectively solve the problem of lengthy initialization time of known optical storage systems.

According to a preferred embodiment of the present invention, in the method for reading track-related specific information on an optical storage medium, firstly, an optical pickup head is moved to read the track-related specific information in a target segment. When reading the target section, the basic content data of the lead-in area in the target section is read first, and then the track-related special information in the data tracks in the target section is sequentially read and stored in the memory. After the data tracks in the target segment are all read, the optical pickup head starts to move to the next segment to continue reading the specific information related to the track.

The object of the present invention is also to provide an optical reading device, which is used to read track-related special information on an optical storage medium, and the optical storage medium is provided with a plurality of sections (session) sequentially. , each section area includes a lead-in area (Lead-in) and a plurality of data tracks (track), and the optical reading device includes: an optical reading head, which is used to read special information related to the track on the optical storage medium; and a controller, used to control and move the optical pickup head to read the track-related special information in a target section; wherein when the optical pickup head reads the target section, it will first read the The basic content data of the lead-in area in the target section, and then sequentially read the track-related special information in these data tracks in the target section, and start after the reading of these data tracks in the target section is completed Move the optical read head to the next session to continue reading track-specific information.

The method for reading track-related special information on an optical storage medium according to the present invention, the reading head of the method can continuously read the basic content of the lead-in area in each section and the track-related special information of each data track without the need for Data is read back and forth, so the time required for initialization can be drastically reduced.

The advantages and spirit of the invention can be further understood through the following detailed description of the invention and the accompanying drawings.

Brief description of the drawings

FIG. 1 is a schematic diagram of some components of the optical reading device and an optical storage medium of the present invention.

FIG. 2 is a schematic diagram of the method for reading data on the optical storage medium shown in FIG. 1 according to the present invention.

Detailed ways

Please refer to FIG. 1 . FIG. 1 is a schematic diagram of some components of an optical reading device 30 and an optical storage medium 36 of the present invention. The optical reading device 30 of the present invention is used to read data on an optical storage medium 36 . The optical storage medium has a program memory area (Program Memory Area, PMA) 42. The optical reading device 30 includes an optical reading head 32 and a controller 34 . The optical pickup head 32 is used to read data on the optical storage medium 36 . The controller 34 is used to control and move the optical pickup head 32 to read data.

Please refer to FIG. 2 . FIG. 2 is a schematic diagram of a method for reading data on the optical storage medium 36 shown in FIG. 1 according to the present invention. The optical storage medium 36 is sequentially provided with a plurality of segment areas 10, 28 with non-repeated serial numbers. The serial numbers of the sections 10 and 28 are I and II respectively. The following only takes the section 10 as an example to describe the section in detail. The session area 10 includes a lead-in area 12 , several tracks 14 , 16 , and a lead-out area 18 . The relevant basic content of the optical storage medium 36 is stored in the lead-in area 12 . The basic content includes the serial number of the section 10 , the number of tracks in the section 10 , the serial number and type of each track in the section 10 , and the corresponding starting positions of all the tracks in the section 10 .

Track types can be divided into data track and audio track. In FIG. 2, the tracks 14 and 16 of the sector 10 are data tracks. Each data track 14, 16 contains information such as the data mode, data packet format, data packet length, and next writable address corresponding to the corresponding data track. Also, the audio track does not have the above data. Regardless of whether it is a data track or a non-data track, each track has a corresponding serial number, and the serial numbers are not only sequentially arranged in the same session without repetition, but also arranged across sessions. In FIG. 2 , the serial numbers of the two tracks in the section 10 and the two tracks in the section 28 are I, II, III, and IV in sequence.

As shown in FIG. 2 , the optical storage medium 36 is sequentially provided with a segment area 10 and a segment area 28 , and is sequentially numbered with corresponding numbers. The section includes a lead-in area 12 , a data track I14 , a data track II16 and a lead-out area 18 . The section 28 includes a lead-in area 20 , an audio track II 122 , a data track IV 24 and a lead-out area 26 .

When the optical storage medium 36 is placed in the optical reading device 30, the optical reading device 30 will execute the method of the present invention to initialize the optical storage medium 36, so as to understand the data distribution situation in the optical storage medium 36 . The controller 34 controls and moves the optical pickup head 32 to read the track-related special information in a target segment, and the target segment is the segment 10 . When the optical pickup head 32 reads the segment area 10 , it will first read the basic content data of the lead-in area 12 . Then read the track-related special information in the data tracks 14, 16 in sequence, and after these data tracks in the segment area 10 are all read, the optical pickup head 32 is moved to the next segment area, that is, the segment area 28, to continue reading track-specific information.

As shown in FIG. 2 , the method of the present invention first moves the optical pickup head 32 to read the track-related specific information in the segment 10 . When reading the section 10, the basic content data of the lead-in area 12 in the section is read first, and then the track-related special information of the data track I14 and the data track II16 in the section is sequentially read. After all the data tracks in the section 10 are read, the lead-out area 18 in the section 20 is skipped to continue reading the basic content data in the lead-in area 20 of the next section 28 .

The audio track III22 contained in the section area 28 is a non-data track, therefore, the optical pick-up head 32 will skip the non-data track without reading the audio track III22, and continue to read the next data track that is Data track IV24. Similarly, after the data tracks in the section 28 are all read, the lead-out area 26 in the section 28 is skipped, and the track-related special information of the next section is continued to be read. If there is no next segment, the optical pick-up head 32 will move back to the initial position of the segment 10 . The continuous arrows 38 and their directions shown in FIG. 2 indicate that the optical pickup head 32 starts to read data from the lead-in area 12 of the segment and gradually moves to the next segment. And when there is no next segment, the optical pick-up head 32 will move back to the initial position of the segment 10 , as shown by the arrow 40 .

The program storage area 42 of the optical storage medium 36 is used to record information such as track number, start address, end address and data attribute of the track written in the optical storage medium 36 . When the optical pick-up head 32 reads a section, if it is found that the section is an unfinished section (Un-closedSession), the optical pick-up 32 will not read the lead-in area of the unfinished section, Instead, the judgment is made by reading the data in the program storage area 42 . If it is found that an unfinished section has a data track, it directly jumps to the data track in the section to read its track-related special information.

Compared with the prior art, in the method of the present invention for reading track-related special information on the optical storage medium 36, the optical reading head 32 can continuously read the basic content of the lead-in area in each section area and each data track track-related special information, without the need for the optical read head 32 to read data back and forth, so the time required for initialization can be greatly reduced.

Through the detailed description of the specific embodiments above, it is hoped that the characteristics and spirit of the present invention can be described more clearly, and the scope of the present invention is not limited by the preferred specific embodiments disclosed above. On the contrary, the intention is to cover various changes and equivalent structures within the scope defined by the claims of the present invention.

Claims (22)

1. a method that reads the relevant specific information of track on an optic storage medium is sequentially provided with a plurality of joints district on this optic storage medium, and each joint district includes a Lead-In Area and a plurality of data-track, and this method comprises:

Move an optical read head to read the relevant specific information of track in the target joint district;

When reading this target joint district, read the substance data of this Lead-In Area in this target joint district earlier, then read the relevant specific information of track in these data-tracks in this target joint district in regular turn;

And in this target joint district these data-tracks all finish read after, just begin this optical read head is moved to next joint district to continue to read the track specific information of being correlated with.

2. the method for claim 1, wherein these joint districts are composed of corresponding sequence number in regular turn, and this target joint district is to be first joint district on this optic storage medium.

3. the method for claim 1, wherein this optical read head can read these joint districts in regular turn, up to all the joint districts on this optic storage medium all finish read till.

4. the method for claim 1, wherein this optical read head is to be arranged in the optical pickup device, in this optic storage medium is positioned in this optical pickup device, this optical pickup device can carry out initialization to this optic storage medium, to understand the DATA DISTRIBUTION situation in this optic storage medium.

5. the method for claim 1, wherein each this joint district includes a leading-out zone in addition and is arranged at after these data-tracks, when this optical read head all finish for these data-tracks read after, can skip this leading-out zone in this joint district, to continue to read the next data that save in the Lead-In Area of distinguishing.

6. the method for claim 1, wherein when optical read head reads the data of this Lead-In Area, if find to include a non-data-track, this optical read head can be skipped this non-data-track in the mode that does not read this non-data-track, and continues to read next data-track.

7. method as claimed in claim 6, wherein the type of this non-data-track is an audio track.

8. the method for claim 1, wherein the relevant specific information of this track is meant that data pattern, data packet form, data packet length, the next one of this data-track can write the address.

9. the method for claim 1, wherein this optic storage medium further has a program storage area, is in order to write down orbit number, start address, end address and the data attribute information that this optic storage medium has write track.

10. method as claimed in claim 9, wherein when this optical read head reads in described a plurality of joints district one joint district, if finding this joint district is a uncompleted joint district, this optical read head can not read the Lead-In Area in this uncompleted joint district, but judge with the data that read this program storage area, have data-track if find uncompleted joint district, then jump directly to data-track in this joint district to read its track specific information of being correlated with.

11. method as claimed in claim 10, wherein the program storage area of this optic storage medium is to read and be recorded among the storer of system when inserting this optic storage medium.

12. an optical pickup device is used for reading the relevant specific information of track on the optic storage medium, is sequentially provided with a plurality of joints district on this optic storage medium, each joint district includes a Lead-In Area and many data-tracks, and this optical pickup device comprises:

One optical read head is used for reading the relevant specific information of track on this optic storage medium;

And a controller, be used for control with move this optical read head, to read the relevant specific information of track in the target joint district;

Wherein when this optical read head reads this target joint district, can read the substance data of this Lead-In Area in this target joint district earlier, then read the relevant specific information of track in these data-tracks in this target joint district in regular turn, and in this target joint district these data-tracks all finish read after, just begin this optical read head is moved to next joint district to continue to read the track specific information of being correlated with.

13. optical pickup device as claimed in claim 12, wherein these joint districts in regular turn numbering corresponding sequence number is arranged, and this target joint district is to be first joint district on this optic storage medium.

14. optical pickup device as claimed in claim 12, wherein this optical read head can read these joint districts in regular turn, up to all the joint districts on this optic storage medium all finish read till.

15. optical pickup device as claimed in claim 12, wherein when placing this optic storage medium, this optical pickup device can carry out initialization to this optic storage medium, to understand the DATA DISTRIBUTION situation in this optic storage medium.

16. optical pickup device as claimed in claim 12, wherein each this joint district includes a leading-out zone in addition and is arranged at after these data-tracks, when this optical read head all finish for these data-tracks read after, can skip this leading-out zone in this joint district, to continue to read the next data that save in the Lead-In Area of distinguishing.

17. optical pickup device as claimed in claim 12, wherein when optical read head reads the data of this Lead-In Area, if find to include a non-data-track, then this optical read head can be skipped this non-data-track in the mode that does not read this non-data-track, and continues to read next data-track.

18. optical pickup device as claimed in claim 17, wherein the type of this non-data-track is an audio track.

19. optical pickup device as claimed in claim 12, wherein the relevant specific information of this track is meant that data pattern, data packet form, data packet length, the next one of corresponding this data-track can write the address.

20. optical pickup device as claimed in claim 12, wherein this optic storage medium further has a program storage area, is in order to write down orbit number, start address, end address and the data attribute information that this optic storage medium has write track.

21. optical pickup device as claimed in claim 20, wherein when this optical read head reads this joint district, if finding this joint district is a uncompleted joint district, this optical read head can not read the Lead-In Area in this uncompleted joint district, but judge with the data that read this program storage area, have data-track if find uncompleted joint district, then jump directly to data-track in this joint district to read its track specific information of being correlated with.

22. optical pickup device as claimed in claim 21, wherein the program storage area of this optic storage medium is to read and be recorded among the storer of system when this optic storage medium is inserted this optical pickup device.

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