Recording medium having data structure for managing reproduction of multiple reproduction path video data recorded thereon and recording and reproducing methods and apparatuses

• US 7,720,356 B2
• Filed: 08/19/2003
• Issued: 05/18/2010
• Est. Priority Date: 11/12/2002
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Um, Soung Hyun, Kim, Byung Jin, Seo, Kang Soo
• Primary Examiner(s): Tran; Thai
• Assistant Examiner(s): CHIO, TAT CHI
• Application Number:
  US10/642,693
• Publication Number:
  US 20040091246A1
• Time in Patent Office: 2,464 Days
• Field of Search: 386/96, 386/125, 386/83, 386/46, 386/95
• US Class Current: 386/240
• CPC Class Codes: G11B 2220/20 Disc-shaped record carriers
• CPC Class Codes: G11B 2220/2541 Blu-ray discs; Blue laser DVR discs
• CPC Class Codes: G11B 27/034 on discs G11B27/036, G11B27/038 take precedence
• CPC Class Codes: G11B 27/105 of operating discs
• CPC Class Codes: G11B 27/329 on a disc [VTOC]
• CPC Class Codes: H04N 5/85 on discs or drums
• CPC Class Codes: H04N 9/8042 involving data reduction
• CPC Class Codes: H04N 9/8205 involving the multiplexing of an additional signal and the colour video signal
• CPC Class Codes: H04N 9/8227 the additional signal being at least another television signal

Abstract

The recording medium has a data structure for managing reproduction of at least multiple reproduction path video data recorded on the recording medium. One or more management areas of the recording medium store path change information. The path change information indicates where changes in reproducing at least one of the reproduction paths of video data are permitted.

Claims

1. An optical disk storing a data structure for managing reproduction by a reproduction apparatus of video data having multiple reproduction paths, comprising:

one or more management files for managing reproduction of the video data by the reproducing apparatus, the management file being separate from a clip file storing the video data, each clip file being associated with one of the one or more management files, each clip file of the multiple reproduction paths being associated with one of the multiple reproduction paths, the management file storing at least one entry point map associated with one of the multiple reproduction paths, each entry point map identifying a plurality of entry points in the video data for the associated reproduction path, the entry point map mapping an address of an entry point in the video data to a presentation time stamp of the entry point,

wherein the entry point map includes path change information for managing changing of reproduction paths by the reproducing apparatus,

the path change information having a plurality of fields, each field associated with at least one of the plurality of entry points, and

the path change information includes a field for identifying whether changing reproduction paths is permitted or not in relation to the associated entry point and another field for identifying where changing reproduction path is permitted in relation to the associated entry point, the another field identifying an entry point in a current reproduction path where changing reproduction paths is permitted if the field identifies that changing reproduction paths is permitted.

2. The optical disk of claim 1, wherein the fields for permitting a change in a same associated reproduction path define one or more units of video data and wherein the field is usable for reproducing the video data seamlessly.

3. The optical disk of claim 2, further comprising:

the clip file having the video data recorded therein, and at least a portion of the video data being multiplexed on a unit of video data basis.

4. The optical disk of claim 1, wherein the multiple reproduction paths of video data are different camera angles of video data.

5. The optical disk of claim 2, wherein each unit of video data starts with an I-picture.

6. The optical disk of claim 2, wherein each unit of video data starts with a closed group of pictures (GOP).

7. The optical disk of claim 1, wherein the entry point maps are aligned in time.

8. The optical disk of claim 1, wherein if the field indicates that changing reproduction paths is permitted in relation to the associated entry point, the another field associated with the entry point indicates a start position of a data packet of the video data.

9. The optical disk of claim 1, wherein each clip file is associated with each entry point map.

10. The optical disk of claim 1, further comprising:

at least one playlist file, the playlist file including at least one playitem, the playitem identifying a playing interval in a reproduction path of the video data, the playitem indicating at least one management file for an associated reproduction path used by the corresponding playitem.

11. A method of recording a data structure for managing reproduction of video data having multiple reproduction paths on a recording medium, comprising:

recording at least one entry point map associated with one of the multiple reproduction paths in one or more management files of the recording medium, each entry point map identifying a plurality of entry points in the video data for the associated reproduction path, the entry point map mapping an address of an entry point in the video data to a presentation time stamp of the entry point, the management file being separate from a clip file for storing the video data, each clip file being associated with one of the one or more management files, each clip file of the multiple reproduction paths being associated with one of the multiple reproduction paths,

wherein the entry point map includes path change information having a plurality of fields, each field associated with at least one of the plurality of entry points, and the path change information includes a field for identifying whether changing reproduction paths is permitted or not in relation to the associated entry point, and another field for identifying where changing reproduction paths is permitted in relation to the associated entry point, the another field identifying an entry point in a current reproduction path where changing reproduction paths is permitted if the field identifies that changing reproduction paths is permitted.

12. The method of claim 11, wherein the fields for permitting a change in a same associated reproduction path define one or more units of video data and wherein the field is usable for reproducing the video data seamlessly.

13. The method of claim 12, wherein at least a portion of the video data is recorded in a clip file with being multiplexed on a unit of video data basis.

14. The method of claim 11, wherein the multiple reproduction paths of video data are different camera angles of video data.

15. The method of claim 11, further comprising:

recording playlist files, the playlist file including at least one playitem, the playitem identifying a playing interval in a reproduction path of the video data, the playitem indicating at least one management file for an associated reproduction path used by the corresponding playitem.

16. A method of reproducing a data structure for managing reproduction of video data having multiple reproduction paths recorded on a recording medium, comprising:

reproducing management information from one or more management files of the recording medium, the management information including at least one entry point map associated with one of the multiple reproduction paths, each entry point map identifying a plurality of entry points in the video data for the associated reproduction path, the entry point map mapping an address of an entry point in the video data to a presentation time stamp of the entry point, the management file being separate from a clip file for storing the video data, each clip file being associated with one of the one or more management files, each clip file of the multiple reproduction paths being associated with one of the multiple reproduction paths,

wherein the entry point map includes path change information having a plurality of fields, each field associated with at least one of the plurality of entry points, and

the path change information includes a field for identifying whether changing reproduction paths is permitted or not in relation to the associated entry point, and another field for identifying where changing reproduction paths is permitted in relation to the associated entry point, the another field identifying an entry point in a current reproduction path where changing reproduction paths is permitted if the field identifies that changing reproduction paths is permitted; and

reproducing the video data based on the management information, wherein the reproducing step further including changing a reproduction path from the current reproduction path to a requested reproduction path based on the path change information if the changing reproduction path is permitted.

17. The method of claim 16, wherein the multiple reproduction paths of video data are different camera angles of video data.

18. The method of claim 16, wherein the current reproduction path is maintained until a position at which exiting the current reproduction path is permitted.

19. The method of claim 16, further comprising:

reproducing playlist files, the playlist file including at least one playitem, the playitem identifying a playing interval in a reproduction path of the video data, the playitem indicating at least one management file for an associated reproduction path used by the corresponding playitem.

20. An apparatus for recording a data structure for managing reproduction of video data having multiple reproduction paths on a recording medium, comprising:

a recording unit configured to record data on the recording medium; and

a controller, operably coupled to the recording unit, configured to control the recording unit to record the video data having multiple reproduction paths on the recording medium, the controller configured to control the recording unit to record at least one entry point map associated with one of the multiple reproduction paths in one or more management files of the recording medium, each entry point map identifying a plurality of entry points in the video data for the associated reproduction path, the entry point map mapping an address of an entry point in the video data to a presentation time stamp of the entry point, the management file being separate from a clip file storing the video data, each clip file being associated with one of the one or more management files, each clip file of the multiple reproduction paths being associated with one of the multiple reproduction paths; and

wherein the entry point map includes path change information having a plurality of fields, each field associated with at least one of the plurality of entry points, and

the path change information includes a field for identifying whether changing reproduction paths is permitted or not in relation to the associated entry point, and another field for identifying where changing reproduction paths is permitted in relation to the associated entry point, the another field identifying an entry point in a current reproduction path where changing reproduction paths is permitted if the field identifies that changing reproduction paths is permitted.

21. The apparatus of claim 20, wherein the fields for permitting a change in a same associated reproduction path define one or more units of video data and wherein the field is usable for reproducing the video data seamlessly.

22. The apparatus of claim 20, wherein if the field indicates that changing reproduction paths is permitted in relation to the associated entry point, the another field associated with the entry point indicates a start position of a data packet of the video data.

23. The apparatus of claim 20, wherein the recording unit includes an optical pickup to record the video data.

24. The apparatus of claim 20, further comprising:

an encoder configured to encode the video data having multiple reproduction paths,

wherein the controller is configured to control the recording unit to record the encoded video data.

25. The apparatus of claim 20, wherein the controller is configured to control the recording unit to record playlist files, the playlist file including at least one playitem, the playitem identifying a playing interval in a reproduction path of the video data, the playitem indicating at least one management file for an associated reproduction path used by the corresponding playitem.

26. An apparatus for reproducing a data structure for managing reproduction of video data having multiple reproduction paths recorded on a recording medium, comprising:

a reproducing unit configured to reproduce data recorded on the recording medium;

a controller, operably coupled to the reproducing unit, configured to control the reproducing unit to read an entry point map associated with one of the multiple reproduction paths from one or more management files of the recording medium, each entry point map identifying a plurality of entry points in the video data for the associated reproduction path, the entry point map mapping an address of an entry point in the video data to a presentation time stamp of the entry point, the management file being separate from a clip file storing the video data, each clip file being associated with one of the one or more management files, each clip file of the multiple reproduction paths being associated with one of the multiple reproduction paths,

wherein the entry point map includes path change information having a plurality of fields, each field associated with at least one of the plurality of entry points, and

the path change information includes a field for identifying whether changing reproduction paths is permitted or not in relation to the associated entry point, and another field for identifying where changing reproduction paths is permitted in relation to the associated entry point, the another field identifying an entry point in a current reproduction path where changing reproduction paths is permitted if the field identifies that changing reproduction paths is permitted; and

the controller configured to control the reproducing unit to reproduce the video data based on the one of more management files, wherein the controller is further configured to control the reproducing unit to reproduce a requested reproduction path based on the path change information if the changing reproduction path from the current reproduction path to the requested reproduction path is permitted.

27. The apparatus of claim 26, wherein the reproducing unit includes an optical pickup to reproduce the video data.

28. The apparatus of claim 26, wherein the another field associated with the entry point indicates a start position of a unit associated with the entry point, wherein the field is usable for reproducing the video data seamlessly.

29. The apparatus of claim 26, wherein the current reproduction path is maintained until a position at which exiting the current reproduction path is permitted.

30. The apparatus of claim 26, wherein the controller is configured to read playlist files, the playlist file including at least one playitem, the playitem identifying a playing interval in a reproduction path of the video data, the playitem indicating at least one management file for an associated reproduction path used by the corresponding playitem.