CN1503238A

CN1503238A - Method for obtaining track related special information during disc initialization and optical reading device

Info

Publication number: CN1503238A
Application number: CNA021528322A
Authority: CN
Inventors: 吴元丁
Original assignee: MediaTek Inc
Current assignee: Hefei Jiefa Technology Co ltd; Shanghai Tuqing Microelectronics Co ltd
Priority date: 2002-11-25
Filing date: 2002-11-25
Publication date: 2004-06-09
Anticipated expiration: 2022-11-25
Also published as: CN1258177C

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

Obtain relevant specific information method of track and optical pickup device during the CD initialization

Technical field

The invention relates to a kind of method that reads the relevant specific information of track, especially on optic storage medium, read the method for the relevant specific information of track.

Background technology

Be sequentially provided with a plurality of joints district on the known optical medium.Each joint district includes a Lead-In Area and a plurality of data-track.Store user's data in this data-track and contain data pattern (Data Mode), data packet form (the Packet Type:Fixed Packet of corresponding this data-track, VariablePacket), data packet length (Packet Size), the next one can write address (Next WritableAddress, NWA) relevant specific information such as track such as grade.

When an optic storage medium is positioned over optical access system when carrying out initialization, optical access system can (table of content TOC) reads action at the substance of each Lead-In Area of this optic storage medium.Its purpose is to understand the DATA DISTRIBUTION situation on this optic storage medium, and these TOC is recorded among the storer of system.When main frame (host) end need be obtained TOC, the optical read head of optical access system did not need to go to read again, and directly reads from storer.

When main frame need read the relevant specific information of the track of particular data track, known had several modes to carry out.A kind of mode is to seek rail (seek) to particular data track by optical read head to read.This mode can cause optical read head expectedly not to be back to different particular data tracks reading the relevant specific information of track.

The mode that known another kind of main frame reads the relevant specific information of track of particular data track is after the substance of each Lead-In Area on reading optic storage medium, from the beginning read each data-track in each joint district more in regular turn, to obtain the relevant specific information of track on the data-track and to be stored in the storer.Main frame then directly reads from storer, reads to avoid must seeking rail to particular data track by optical read head.

Though, when main frame needs the particular data orbital data, can directly from storer, read, and make optical read head reduce the time of seeking rail, many must from the beginning read the relevant specific information of track of each data-track and it is stored in the required time of storer, and cause system to carry out tediously long problem of initialization time.

Summary of the invention

Purpose of the present invention is to provide a kind of method that reads the relevant specific information of track on optic storage medium, carries out tediously long problem of initialization time with effective solution known optical storage system.

According to of the present invention one preferred specific embodiment, the present invention reads on an optic storage medium in the method for the relevant specific information of track, at first moves 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 area joint earlier, then read in this target joint district the relevant specific information of track in these data-tracks in regular turn and be stored in the storer.After these data-tracks are all finished and read in this target joint district, just begin this optical read head is moved to next joint district to continue to read the relevant specific information of track.

The present invention also aims to provide a kind of optical pickup device, this optical pickup device is used for reading the relevant specific information of track on the optic storage medium, be sequentially provided with a plurality of joints district (session) on this optic storage medium, each joint district includes a Lead-In Area (Lead-in) and complex data track (track), this optical pickup device comprises: an 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.

The present invention reads the method for the relevant specific information of track on optic storage medium, this method read head can read the substance of Lead-In Area in each joint district and the relevant specific information of track of each data-track continuously, and do not need reading of data back and forth, therefore can significantly reduce the required time of initialization.

Advantage and spirit about invention can be further understood by the following detailed description and accompanying drawings.

Brief Description Of Drawings

Fig. 1 is the synoptic diagram of an optical pickup device subelement of the present invention and an optic storage medium.

Fig. 2 is the synoptic diagram of the present invention's method of reading of data on optic storage medium shown in Figure 1.

Embodiment

See also Fig. 1, Fig. 1 is the synoptic diagram of optical pickup device 30 subelements of the present invention and an optic storage medium 36.Optical pickup device 30 of the present invention is the data that are used for reading on the optic storage medium 36.This optic storage medium has a program storage area (Program Memory Area, PMA) 42.Optical pickup device 30 comprises an optical read head 32 and a controller 34.Optical read head 32 is the data that are used for reading on the optic storage medium 36.Controller 34 is to be used for control and mobile optical read head 32, with reading of data.

See also Fig. 2, Fig. 2 is the synoptic diagram of the present invention's method of reading of data on optic storage medium shown in Figure 1 36.Be sequentially provided with the

joint district

10,28 of a plurality of unduplicated sequence numbers on the optic storage medium 36.The sequence number in

joint district

10,28 is respectively I, II.Be that example is described in detail the joint district only below with joint district 10.Joint district 10 comprises a Lead-In Area 12,

several tracks

14,16 and a leading-out zone 18.Store relevant this substance of optic storage medium 36 in the Lead-In Area 12.This substance includes the corresponding reference position of all tracks in the sequence number of each track in the number of tracks that had in the sequence number, joint district 10 in joint district 10, the joint district 10 and type and the joint district 10.

The track kind can be divided into data-track, audio track.Among Fig. 2,14,16 on the track in joint district 10 is a data-track.The data pattern, data packet form, data packet length, the next one that contain corresponding this data-track in each data-

track

14,16 can write information such as address.In addition, audio track does not have above-mentioned data.No matter be data-track or non-data-track, each track all has a corresponding sequence number, and this sequence number not only compiles in regular turn and do not repeat in identical joint district, compiles this sequence number with also can striding the joint district.Among Fig. 2, joint is distinguished two tracks of 10 and saved the sequence number of distinguishing two tracks in 28 is I, II, III, IV in regular turn.

As shown in Figure 2, be sequentially provided with joint district 10, joint district 28 on the optic storage medium 36, and be composed of corresponding sequence number in regular turn.The joint district includes a Lead-In Area 12, a data-track I14, a data-track II16 and a leading-out zone 18.Joint district 28 comprises a Lead-In Area 20, an audio track III22, a data-track IV24 and a leading-out zone 26.

When optic storage medium 36 is positioned in the optical pickup device 30, optical pickup device 30 can be carried out method of the present invention and come optic storage medium 36 is carried out initialization (initialization), to understand the DATA DISTRIBUTION situation in the optic storage medium 36.And controller 34 can control and mobile optical read heads 32, and reading the relevant specific information of track in the target joint district, and target joint district is joint district 10.When optical read head 32 reads joint district 10, can read the substance data of Lead-In Area 12 earlier, the relevant specific information of the track in the reading of

data track

14,16 in regular turn then, and in joint district 10 these data-tracks all finish read after, beginning moves to i.e. joint district 28, next joint district with optical read head 32, to continue to read the relevant specific information of track.

As shown in Figure 2, method of the present invention at first mobile optical read head 32 to read the relevant specific information of track in the joint district 10.When reading joint district 10, read the substance data of Lead-In Area 12 in district's joint earlier, then read in the relevant specific information of track of data-track I14 and data-track II16 in the joint district in regular turn.After these data-tracks are all finished and read in joint district 10, can skip the leading-out zone 18 that saves in the district 20, to continue to read the substance data in the Lead-In Area 20 that promptly saves district 28 in next joint district.

The audio track III22 that is comprised in joint district 28 is non-data-track, and therefore, optical read head 32 can be skipped this non-data-track in the mode that does not read audio track III22, and to continue to read next data-track be data-track IV24.Similarly, after these data-tracks are all finished and read in joint district 28, can skip the leading-out zone 26 in the joint district 28, continue to read the relevant specific information of track in next joint district.If there has not been next joint district, then optical read head 32 can be retracted joint district 10 reference positions.Arrow 38 that shown in Figure 2 each is continuous and direction indication optical read head 32 thereof are distinguished and move to next joint gradually by the Lead-In Area 12 beginning reading of data in joint district.And when not having next joint district, optical read head 32 can be retracted joint district 10 reference positions, and is as shown in arrow 40.

The program storage area 42 that optic storage medium 36 is had is in order to write down the information such as orbit number, start address, end address and data attribute that this optic storage medium 36 has write track.When optical read head 32 reads a joint district, if finding this joint district is a uncompleted joint district (Un-closedSession), optical read head 32 can not read the Lead-In Area in this uncompleted joint district, but judges with the data that read this program storage area 42.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.

Compared to prior art, the present invention reads on optic storage medium 36 in the method for the relevant specific information of track, optical read head 32 can read the substance of Lead-In Area in each joint district and the relevant specific information of track of each data-track continuously, and do not need optical read head 32 reading of data back and forth, therefore can significantly reduce the required time of initialization.

By the detailed description of above specific embodiment, be to wish to know more to describe feature of the present invention and spirit, and be not to come category of the present invention is limited with above-mentioned disclosed preferred specific embodiment.On the contrary, its objective is that hope can be covered by the structure of various changes and tool equality in claims restricted portion of the present invention.

Claims

1. A method for reading track-related special information on an optical storage medium, the optical storage medium is provided with a plurality of sections in sequence, each section includes a lead-in area and a plurality of data tracks, the method includes :

moving an optical pickup head to read track-specific information in a target session;

When reading the target section, first read the basic content data of the lead-in area in the target section, and then sequentially read the track-related special information in the data tracks in the target section;

And after the data tracks in the target section are all read, the optical pickup head starts to move to the next section to continue reading the special information related to the track.

2. The method as claimed in claim 1, wherein the sections are sequentially coded with corresponding serial numbers, and the target section is the first section on the optical storage medium.

3. The method of claim 1, wherein the optical pickup head reads the sections sequentially until all sections on the optical storage medium are read.

4. The method as claimed in claim 1, wherein the optical pickup head is arranged in an optical pickup device, and when the optical storage medium is placed in the optical pickup device, the optical pickup device will perform The method is used to initialize the optical storage medium, so as to know the distribution of data in the optical storage medium.

5. The method as claimed in claim 1, wherein each of the section areas further comprises a lead-out area (Lead-out) arranged behind the data tracks, when the optical pick-up head has finished reading the data tracks, The lead-out area in this section will be skipped to continue reading the data in the lead-in area of the next section.

6. The method as claimed in claim 1, wherein when the optical pickup head reads the data in the lead-in area, if it is found that a non-data track (non-data track) is included, the optical pickup head will not read the data. skip the non-data track and continue to read the next data track.

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

8. The method according to claim 1, wherein the track-related special information refers to the data mode (Data Mode), data packet format (Packet Type: Fixed Packet, VariablePacket), and data packet length (Packet Size) of the data track. , the next writable address (Next WritableAddress, NWA), etc.

9. The method as claimed in claim 1, wherein the optical storage medium further has a program memory area (Program Memory Area, PMA), which is used to record the track number, start address, end Information such as addresses and data attributes.

10. The method as claimed in claim 9, wherein when the optical pickup head reads the session, if the session is found to be an unfinished session (Un-closed Session), the optical pickup does not It will read the lead-in area of the unfinished section, but judge by reading the data in the program storage area. If it finds that the unfinished section has a data track, it will directly jump to the data track in the section to read special information about its orbit.

11. The method according to claim 10, wherein the program memory area (Program Memory Area, PMA) of the optical storage medium is read and recorded in the system when the optical storage medium is inserted into the optical reading device in memory.

12. An optical reading device, used to read track-related special information on an optical storage medium, the optical storage medium is provided with a plurality of sections (session) in sequence, and each section includes a lead-in area ( Lead-in) and multiple data tracks (track), the optical reading device includes:

An optical read head, used for reading track-related special information on the optical storage medium;

and a controller for controlling and moving the optical pickup head to read track-related special information in a target segment;

When the optical pickup head reads the target section, it will first read the basic content data of the lead-in area in the target section, and then sequentially read the track-related special data in these data tracks in the target section. information, and after the data tracks in the target section area are all read, the optical pickup head starts to move to the next section area to continue reading track-related special information.

13. The optical pickup device as claimed in claim 12, wherein the segments are sequentially numbered with corresponding serial numbers, and the target segment is the first segment on the optical storage medium.

14. The optical pickup device as claimed in claim 12, wherein the optical pickup head reads the sections sequentially until all sections on the optical storage medium are read.

15. The optical reading device as claimed in claim 12, wherein when the optical storage medium is placed in the optical reading device, the optical reading device will initialize the optical storage medium to understand The distribution of data in the optical storage medium.

16. The optical pick-up device as claimed in claim 12, wherein each section further comprises a lead-out area (Lead-out) arranged behind the data tracks, when the optical pick-up head completes the data tracks After reading, the lead-out area in this section will be skipped to continue reading the data in the lead-in area of the next section.

17. The optical reading device as claimed in claim 12, wherein when the optical reading head reads the data in the lead-in area, it is found to contain a non-data track (non-data track), and the optical reading head will The non-data track is skipped without reading the non-data track, and the next data track is read continuously.

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

19. The optical reading device as claimed in claim 12, wherein the track-related special information refers to a data mode (Data Mode), a data packet format (Packet Type: FixedPacket, Variable Packet), and a data packet length corresponding to the data track. (Packet Size), the next writable address (NextWritable Address, NWA), etc.

20. The optical reading device as claimed in claim 12, wherein the optical storage medium further has a program storage area, which is used to record the track number, start address, end address and data attribute of the track written in the optical storage medium and other information.

21. The optical pickup device as claimed in claim 20, wherein when the optical pickup head reads the section, if the section is found to be an incomplete section, the optical pickup will not read The lead-in area of the unfinished section is judged by reading the data of the program storage area. If it is found that the unfinished section has a data track, it will directly jump to the data track in the section to read Special information about its orbit.

22. The optical reading device as claimed in claim 21, wherein the program memory area (Program Memory Area, PMA) of the optical storage medium is read and recorded when the optical storage medium is inserted into the optical reading device in the system memory.