CN1282971C - Method for reading table of contents of multi-section optical recording medium - Google Patents

Abstract

The invention relates to a method for reading a table of contents of a multi-section optical recording medium, comprising the following steps: providing a memory for storing the table of contents of the first section; After the second section, directly read the content table of the first section from the memory and integrate it with a second section content table; when there is no new second section and a data state of the first section changes, update the second section One section content table, and re-store the first section content table into the memory; when the second section has been added, but the data status of the first section is to be changed, the second section can be erased so that the first section can be changed. The data state of the section area, and re-store the updated content table of the first section area into the memory; and when the second section area has been added, if a data state of the second section area is changed, the content of the second section area is updated table, and store the content table of the second section into memory.

Description

Method for reading table of contents of multi-section optical recording medium

technical field

The present invention relates to a kind of reading method of multi-session (session) optical recording medium table of contents, especially a kind of table of content (Table of Content, TOC) of the section area that has completed data storage is stored in a memory first, And when there is a new section area, directly read the content table from the memory and integrate it with the content table of the newly added section area to obtain the updated content table of the optical recording medium.

Background technique

Please refer to FIG. 1 . FIG. 1 is a schematic structural diagram of a multi-section optical recording medium 20 . The multi-segment optical recording medium 20 includes a first segment area 21 , a second segment area 22 and a third segment area 23 . Each of the above sections includes a lead-in area (lead-in area) 211, 221 and 231, a data storage area (program area) 212, 222 and 232, and a lead-in area 213, 223 and 233 respectively. The lead-in areas 211, 221 and 231 are respectively used to store the table of contents of the sections 21, 22 and 23, and the data storage areas 212, 222 and 232 are used to store the digital data of the sections. Typical digital data includes such as data data or audio-visual data, and the table of contents includes information such as the start time of the section and the number and size of tracks contained in the data storage area in the section.

After the data writing operation of a certain section is completed, the table of contents of the section must be changed, and an updated table of contents must be provided corresponding to the change of the above table of contents. The practice of the known technology is that after each completion of the data writing action of a new section, the optical read-write head must be moved to the lead-in area of all completed data storage sections (including the latest completed data storage section) for reading. After taking actions to obtain the table of contents of these sections, an updated table of contents of the optical recording medium device can be provided. Taking FIG. 1 as an example, after the data writing operation of the third section area 23 is completed, the optical read-write head needs to sequentially go to the first lead-in area 211 , the second lead-in area 221 and the third lead-in area 231 to read the table of contents. And after completing the data writing operation of the fourth section area (not shown, which is the section area after the third section area), the read-write head must also sequentially read the table of contents of all four completed section area lead-in areas. With the progress of the data recording operation, the read/write head must read the table of contents of each completed data storage segment area after each new segment area data recording operation is completed. This means that when the section address is farther away from the defined disk center or the number of sections is increasing, the number of times to read the content table of the section lead-in area will increase accordingly, and move to each section import Each section will consume a period of time, which will be longer than the time required to provide an updated table of contents for the optical recording medium after the new section data is written. In addition, the optical recording medium device sometimes also needs to read the information located in the program management area (PMA). The method of the known technology is also to move the optical head to the data management area (PMA) after each segment is recorded. Its address is before the lead-in area of the first section area) to read the information of the data management area, and this will make the optical head spend more time to move its position.

Contents of the invention

The main purpose of the present invention is to provide a method for reading the table of contents of an optical recording medium by overcoming the time-consuming shortcomings of the prior art. The reading method of the present invention stores the table of contents of the section into a memory after each completion of storing the table of contents of the section, and does not need to move the optical disk after the data writing operation of the next section is completed. Head to the previously completed section lead-in area, and directly read the stored section content table from the memory; in addition, since the content table of this section is already known when the data is written, as long as After reading out the stored table of contents of the completed section from the memory, and integrating it with the table of contents of the newly completed section, an updated table of contents of the optical recording medium can be provided.

The purpose of the present invention can be achieved through the following measures:

A method for reading a table of contents of a multi-section optical recording medium. An optical recording medium includes a plurality of sections, and each section includes a lead-in area for storing a table of contents of the optical recording medium and a data storage area. It is used to store a digital data written to the optical recording medium, wherein when a data state of the optical recording medium changes, the table of contents will be updated correspondingly, and the method for reading the table of contents includes the following steps:

Provide a memory to store the content table of the section area that has completed data storage; when the data state changes and a new section area is added, after the addition of the new section area is completed, it is directly read from the memory The table of contents of the section of the completed data storage is integrated with the table of contents of the newly added section; Finally, the data state of the section area of data storage is completed, and the changed content table of the section area is re-stored into the memory.

The change of the data status of the section area where the data storage is completed last is to change the size of the data storage area of the section area.

The said change of the data state of the section area where the data storage is completed last is to change the track number of the data storage area of the section area.

The change of the data state of the section area where the data storage is finally completed is to erase the content of the lead-in area of the section area.

The change of the data state of the last section of data storage is to erase the content of the last section of data storage.

The said erasing the content of the section area where the data storage is completed last is to delete the contents of the lead-in area, the data storage area and the lead-out area of the section area that are last stored.

After the content of the lead-in area of the section area where data storage is completed last is erased, the content of the section area that completes data storage before the section area that completes data storage can be changed, and the internal memory is updated after completion Stored corresponding section content table.

When the data state of the optical recording medium changes, a step is also included to update the content of a data management area of the optical recording medium, and also store the updated content of the data management area into the internal memory.

When the optical recording medium is under a test recording operation, the data management area and table of contents stored in the internal memory remain unchanged.

In the reading method of the table of contents of the multi-section optical recording medium of the present invention, a blank optical recording medium can accommodate a plurality of sections, and each section includes a lead-in area for storing a table of contents of the optical recording medium And a data storage area is used to store a digital data recorded to the optical recording medium, wherein when the recording data is completed to a newly added first section of the blank optical recording medium, it will correspond to a content of the first section The table is stored in the lead-in area of the first section area, and the content table reading method includes the following steps:

providing a memory for storing the table of contents of the first section;

When a second section is added, after the recording of the second section is completed, the table of contents of the first section is directly read from the internal memory and integrated with the table of contents of the second section;

When the second section is not newly added and a data state of the first section changes, update the content table of the first section, and re-store the content table of the first section into the memory;

When the second section has been added, but the data state of the first section is to be changed, the second section is erased to change the data state of the first section, and the updated first section The table of contents is restored to this memory; and

When the second section has been added, if a data state of the second section is changed, the content table of the second section is updated, and the content table of the second section is stored in the memory.

Said changing the data state of the first section or the second section means changing the size of the data storage area of the first section or the second section respectively.

Said changing the data state of the first section or the second section is to change the number of tracks of the data storage area of the first section or the second section respectively.

Said changing the data state of the first section or the second section is to erase the content of the lead-in area of the first section or the second section respectively.

Said changing the data state of the first section or the second section is to erase the content of the first section or the second section respectively.

The said erasing the content of the first section or the second section is to delete the last stored contents of the lead-in area, the data storage area and the lead-out area of the section.

The method also includes the step of adding a third section. After the third section is stored, the content table of the first section and the content table of the second section are directly read from the memory and combined with the content table of the second section. A table of contents integration for the third section area.

The method also includes a step of reading the content of the third section lead-in area after the addition of the third section area is completed, and combining the content of the third section lead-in area with the first section stored in the internal memory. area is integrated with the table of contents of the second section area.

The method also includes a step of updating the content of a data management area of the optical recording medium when the data state of the first section, the second section or the third section changes, and managing the updated data The contents of the area are also stored in this memory.

The method also includes a step of updating the content of a data management area of the optical recording medium when the data status of the first section area and the second section area changes, and storing the updated content of the data management area in the same the memory.

When the optical recording medium performs a test recording operation, the content of the data management area stored in the internal memory and the table of contents of the first section or the second section remain unchanged.

The method also includes a step of reading the content of the second section lead-in area after the second section area is burned, and combining the content of the second section area lead-in area with the first section area stored in the internal memory Table of contents integration.

Description of drawings

Fig. 1 is the structural representation of multi-section optical recording medium; And

Fig. 2 is a flow chart of the content table reading method of the present invention.

Detailed ways

Please refer to FIG. 2 . FIG. 2 is a flow chart of a method 50 for reading the table of contents of an optical recording medium according to the present invention. Optical recording medium table of contents reading method 50 comprises the following steps:

Step 51: start;

Step 52: providing a memory for storing the table of contents of the section area where the data storage has been completed;

Step 53: judging whether the next command will add a new section on the optical recording medium or change the data status of the already recorded section, if so, go to step 56, otherwise go to step 54;

Step 54: directly read the updated table of contents of the optical recording medium from the memory;

Step 56: Determine whether the next command is to add a new section? If so, go to step 57, otherwise go to step 58;

Step 57: After completing the burning action of the newly added section, integrate the table of contents of the newly added section with the table of contents of the section already stored in the internal memory for data storage;

Step 58: Change the data state of the section area that has completed the data storage last, and store the changed section area content table back into the memory; and

Step 59: End.

The feature of the present invention is to provide a memory, preferably a dynamic random access memory (DRAM), for storing the table of contents of the recorded section (step 52). Afterwards, if the optical recording medium device or the command terminal (host) does not continue to add new sections or change the data state of the completed recording section, it will directly read the previously stored section content table from the memory. (step 54). And when there is an order to add and burn the second section area, after completing the burning of the newly added section area, the table of contents of the newly added section area will be integrated with the table of contents of the section area that has completed data storage in the internal memory (as in step 57). The reason why the table of contents of the newly added section and the table of contents of the section of completed data storage in the internal memory can be directly integrated is that when a new section data is burned, the table of contents of the newly added section belongs to a known state, Therefore, the table of contents in the internal memory can be directly integrated without difficulty to update the table of contents of the optical recording medium. When the command sent by the command end is not to add a new section, it may be to change the data state of the section that has stored data (step 58). In order to change the data status of the stored data section, such as adding a new data storage area in a certain section, or changing the digital data stored in the section data storage area, or erasing all the contents of a certain section, etc. When taking action, you must first start from the last section where data storage is completed.

Please refer back to FIG. 1 . Since FIG. 1 is a schematic diagram of a segment area of a general optical recording medium, when it is necessary to explain changing the data state of a segment area, FIG. 1 is still used for illustration. Wherein, when the data state of the section area that has completed data storage changes, there may be the following situations: (1) change the size of the data storage area in the section area data storage area that has completed data storage; The section data storage area of data storage changes the number of tracks in the data storage area; (3) erases the contents of the section lead-in area; or even (4) erases all the contents in the section area. Regardless of any of the above data status changes, the content table of the section will change accordingly. Because the recording mode of the optical recording medium is to record data sequentially along the spiral track of the disc, so after the first section area 21 has been recorded, the data can be continuously recorded to the second section area 22, and then the third section area can be recorded. 23. The action of data storage is performed. Just opposite to the order of data storage, if we want to perform the above action of changing the data state, we must first start from the last section where the data is stored. For example, assuming that at the beginning the command terminal issues an order to record data to the first section area 21, then a memory is provided in addition to store the first section area content table of the first lead-in area 211, and then if the second section is continued During the data storage operation of the area 22, after the storage operation is completed, the first section content table is read out from the memory and integrated with the second section content table just stored. If the second section area 22 is not newly added, that is, no data is stored in the second section area 22, but the data state of the first section area 21 is changed, then the updated first section area content table is stored in the memory again . The data status change of the first section area 21, as mentioned above, may be that the content of the data storage area changes, or the size of the data storage area changes, or the content of the section lead-in area is erased, or even the entire The data in the section area (including the lead-in area, the lead-out area, and the data storage area) are all erased (erase). However, if the content of the data storage area in the section area is to be changed, the content of the section area lead-in area must be changed first, which is the so-called action of un-closing the section area. After having finished recording data to the second section area 22, but just want to change the data content of the first section area data storage area 212, at this moment just must earlier the data of the second section area be given all erasure, and then change the second section area The contents of the first section import area 211 are used to open the first section area 21, and the digital data content of the first section area data storage area 212 can be modified later. After completing the content update of the first data storage area 212, the table of contents of the first lead-in area 211 is relatively updated, so this table of contents will be stored in the internal memory again, and the second section area that has been completely erased 22, another data recording step is required to record again. Similarly, after the second section area 22 is recorded, the table of contents of the second section area is also stored in the memory. Like this, after needing to carry out the burning of the third section area 23 and finishing relevant burning action, just can directly read the content of the first section area and the content table of the second section area from memory, with the third section area just finished burning. The table of contents of the section is integrated to obtain an updated table of contents of the optical recording medium.

Changing the data state of the first section 21 or the second section 22 includes the following possibilities: (1) changing the size of the data storage area 212 or 222 of the first section 21 or the second section 22; (2 ) changing the number of tracks contained in the data storage area 212 or 222 of the first section 21 or the second section 22; (3) erasing the content of the first section lead-in area 211 or the second section lead-in area 221; and (4) Erase all contents of the first section area 21 or the second section area 22 . Same as the previous description, when the content of the first section area 21 (whether it is the data storage area 212 or the lead-in area 211) is to be changed, all the data in the second section area 22 must be erased first, and then it can be deleted. The content of the lead-in area 211 of the first section 21 stored earlier than the second section 22 is changed to open the first section 21 .

In order to avoid unexpected situations that may occur during the recording process, the present invention additionally includes a step of reading the table of contents and the first data stored in the internal memory directly from the third lead-in area 231 after the third section area 23 has been burned. The section area is integrated with the table of contents of the second section area. The same principle can also be applied to the situation where the table of contents of the first section has been recorded before, and after the data of the second section is burned, the optical read-write head moves to the lead-in area of the second section to read the table of contents of the second section , and then integrate the table of contents of the second section with the table of contents of the first section, which is slightly different from the method of directly integrating the table of contents learned when burning the second section with the table of contents of the first section.

The present invention further includes a step of updating the content of the data management area of the optical recording medium when the state of the data of the optical recording medium changes, and storing the content of the data management area in the memory. The purpose is the same as that of storing the burnt section table of contents in memory, which is to make it unnecessary to move the optical head to each section when the command end needs to know the contents of the table of contents (or data management area). The lead-in area (or data management area) to reduce the data search time of the optical head. In addition, when the optical recording medium is under a test write operation, no matter whether it is the data management area or the content of the lead-in area/data storage area/lead-out area of each section area, the content does not change, so when the memory has stored data When managing the contents of the area or the table of contents of each section, the data can be read directly from the memory without moving the optical head.

Compared with the known technology, the reading method of the table of contents of the optical recording medium provided by the present invention is to use a memory to dynamically store the table of contents of each section, and after the step of recording the data of the next section is completed, it does not need to be sequentially read. Move the optical head to the lead-in area of each section in a timely manner, and directly use the table of contents stored in the internal memory to integrate with the table of contents of the newly recorded section to obtain the update information of the optical recording medium due to the implementation of the new recording operation. table of contents. And for the sake of the table of contents being updated is correct, the present invention additionally includes a step of moving the optical head to the lead-in area of the section area that has just completed the recording action, reads its table of contents, and then compares it with other earlier completed files stored in the internal memory. Table of contents integration for data burning sections. In this way, the optical head does not need to move to each section lead-in area one by one, thereby shortening the time for obtaining the updated table of contents of the optical recording medium.

Claims (21)

1. the read method of a more piece district optical record medium contents table, one optical record medium includes a plurality of joints district, respectively this joint district includes a contents table and the data storage area that a Lead-In Area is used for storing this optical record medium and is used for storing the numerical data of imprinting to this optical record medium, wherein when a data mode of this optical record medium changes, this contents table is upgraded correspondence, and this contents table read method includes the following step:

The contents table in the joint district that provides an internal memory to be used for storing to finish data storage; When this data mode changes is when increase the joint district in addition, finish newly-increased should newly-increased joint district after, directly by the contents table that reads this joint district that has finished data storage in this internal memory and contents table integration of distinguishing with this newly-increased joint; And be when changing the data mode in the joint district that finishes data storage when the data mode of this optical record medium changes, be the data mode that changes the joint district that finishes data storage at last earlier, and the joint district contents table after will changing deposit this internal memory again in.

2. the method for claim 1 is characterized in that, the data mode in the joint district of data storage is finished in described change at last, is the size that changes the data storage area in this joint district.

3. the method for claim 1 is characterized in that, the data mode in the joint district of data storage is finished in described change at last, is the number of tracks that changes the data storage area in this joint district.

4. the method for claim 1 is characterized in that, the data mode in the joint district of data storage is finished in described change at last, is the content of Lead-In Area in this joint district of erasing.

5. the method for claim 1 is characterized in that, the data mode in the joint district of data storage is finished in described change at last, is to erase that this finishes the content in the joint district of data storage at last.

6. method as claimed in claim 5 is characterized in that, described this content of finishing the joint district of data storage at last of erasing is with the content deletion of the leading-out zone in this Lead-In Area, this data storage area and this joint district in this joint district of storage at last.

7. method as claimed in claim 5, it is characterized in that, described erasing after this finishes the content of Lead-In Area in joint district of data storage at last, could change the content of before this finishes the joint district of data storage at last, finishing the joint district of data storage, and after finishing, upgrade the joint district contents table of the correspondence of being stored in this internal memory.

8. the method for claim 1, it is characterized in that, when this optical record medium data mode changes, also include the content that a step is upgraded a data management zone of this optical record medium, and the content in this data management zone after will upgrading is stored to this internal memory equally.

9. the method for claim 1 is characterized in that, tests imprinting when this optical record medium one and moves following time, and this data management zone and contents table that has been stored in the internal memory remains unchanged.

10. the method for claim 1, it is characterized in that, this optical record medium is initially in space state, when finishing engraving data to the newly-increased first segment district of this blank optical record medium, to be stored to this first segment district Lead-In Area corresponding to a contents table in this first segment district, in the step of this contents table read method:

The described joint district that finishes data storage is this first segment district;

Described newly-increased in addition newly-increased joint district is the second joint district;

It is to include the following step in the step when changing the data mode in the joint district that finishes data storage that described data mode when this optical record medium changes:

When a data mode in not newly-increased this second joint district and this first segment district changes, upgrade this first segment district contents table, and deposit this first segment district contents table in this internal memory again;

When newly-increased this second joint district, but desire is when changing this first segment district data mode, and this second joint district of erasing is changing this first segment district data mode, and this first segment district contents table after will upgrading deposits this internal memory again in; And

When newly-increased this second joint district, if when changing a data mode in this second joint district, upgrade the contents table in this second joint district, and deposit this second joint district contents table in this internal memory.

11. method as claimed in claim 10 is characterized in that, this first segment district of described change or this second joint district data mode are the sizes that changes the data storage area in this first segment district or this second joint district respectively.

12. method as claimed in claim 10 is characterized in that, this first segment district of described change or this second joint district data mode are the number of tracks that changes the data storage area in this first segment district or this second joint district respectively.

13. method as claimed in claim 10 is characterized in that, this first segment district of described change or this second joint district data mode is the Lead-In Area content in this first segment district or this second joint district of erasing respectively.

14. method as claimed in claim 10 is characterized in that, this first segment district of described change or this second joint district data mode is the content in this first segment district or this second joint district of erasing respectively.

15. method as claimed in claim 14 is characterized in that, the content of this Lead-In Area that described content of erasing this first segment district or this second joint district is this joint district of storage at last and the leading-out zone in this data storage area and this joint district is deleted.

16. method as claimed in claim 10, it is characterized in that, this method also includes the step in newly-increased one the 3rd joint district, after finishing storage the 3rd joint district, directly reads out this first segment district contents table and this second joint district's contents table by this internal memory and integrates with a contents table in the 3rd joint district.

17. method as claimed in claim 16, it is characterized in that, this method also includes a step after the 3rd joint is distinguished newly-increased finishing, read the 3rd and save the content of distinguishing Lead-In Area, and the 3rd content that saves district's Lead-In Area is saved the contents table integration of distinguishing with the first segment district and second that is stored in this internal memory.

18. method as claimed in claim 16, it is characterized in that, this method also includes a step in this first segment district, when this second joint district or the 3rd saves district's data mode change, upgrade the content in a data management zone of this optical record medium, and the content in this data management zone after will upgrading is stored to this internal memory equally.

19. method as claimed in claim 10, it is characterized in that, this method also includes a step in this first segment district and this second joint district data mode when changing, upgrade the content in a data management zone of this optical record medium, and the content in this data management zone after will upgrading is stored to this internal memory equally.

20. method as claimed in claim 19 is characterized in that, when this optical record medium operation one test imprinting action, this has been stored to the content in the data management zone in the internal memory and the contents table in this first segment district or this second joint district remains unchanged.

21. method as claimed in claim 10, it is characterized in that, this method also includes a step after this second joint district finishes imprinting, reads the content of this second joint district Lead-In Area, and the content of this second joint district Lead-In Area is integrated with the first segment district contents table that is stored to this internal memory.

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