Method and apparatus for optimizing a playlist of material

• US 5,924,071 A
• Filed: 09/08/1997
• Issued: 07/13/1999
• Est. Priority Date: 09/08/1997
• Status: Expired due to Term

• Current Assignee: Sony Corporation (Sony Group Corp.), Sony Electronics Inc. (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.), Sony Electronics Inc. (Sony Group Corp.)
• Inventors: Tao, Douglas Koji, Morgan, Oliver Frederick, Powell, Michael
• Primary Examiner(s): Hudspeth, David R.
• Assistant Examiner(s): ZINTEL, HAROLD ALBERT
• Application Number:
  US08/925,098
• Time in Patent Office: 673 Days
• Field of Search: 704/278, 369/32, 369/2, 369/53, 369/60, 369/54
• US Class Current: 704/278
• CPC Class Codes: G11B 2220/90 Tape-like record carriers
• CPC Class Codes: G11B 27/024 on tapes G11B27/028, G11B27/029 take precedence
• CPC Class Codes: G11B 27/032 on tapes G11B27/036, G11B27/038 take precedence
• CPC Class Codes: G11B 27/034 on discs G11B27/036, G11B27/038 take precedence
• CPC Class Codes: G11B 27/34 Indicating arrangements indicating means incorporated in magazine or cassette G11B23/046 and G11B23/0875; indicating measured values in general G01D

Abstract

A memory that includes data corresponding to a play list is controlled by an associated circuit that eliminates the problems created during playback by short data segments. The play list is parsed to determine whether any segments in the play list fail to exceed a threshold length. Such a segment is copied along with all or part of the next segment to create a new "virtual" segment that exceeds the threshold length. During playback, the virtual segment is used instead of the original short segment.

Claims

1. A computer implemented method for optimizing a playlist of material comprising the steps of:

receiving a play list, said play list comprising a plurality of segments, the segments corresponding to different material portions of the material;

determining if material corresponding to one of the plurality of consecutive segments is less than a predetermined duration;

if a duration of material of one segment is less than the predetermined duration, creating a virtual segment of material of consecutive segments including the one segment and updating the playlist to refer to the virtual segment.

2. The method as set forth in claim 1, wherein each segment points to a storage location where corresponding material is stored.

3. The method as set forth in claim 1, wherein the predetermined duration is an amount of time corresponding to the amount of time needed to retrieve corresponding material and begin play of a segment.

4. The method as set forth in claim 1, further comprising the step of storing virtual segment material in a cache.

5. The method as set forth in claim 1, wherein the step of creating a virtual segment comprises the step of combining material from the one segment and at least a portion of material from the next segment to form one virtual segment, the combination of the data from the one segment and the material portion of the next segment being sufficiently large such that the duration of the virtual segment material is greater than the predetermined duration.

6. The method as set forth in claim 1, wherein the step of creating a virtual segment comprises the step of combining material of the one segment and the next segment to form one virtual segment material.

7. The method as set forth in claim 1, wherein the step of updating the playlist comprises the step of replacing the one and next segment with the virtual segment.

8. The method as set forth in claim 1, wherein if virtual segment material pre-exists, said method further comprising the steps of re-using the corresponding pre-existing virtual segment and material.

9. A computer implemented method for optimizing a playlist of material, said method comprising the steps of:

receiving a playlist, said playlist comprising a plurality of segments, the segments corresponding to different portions of the material;

determining if material of segments consecutively listed in the playlist is less than a predetermined duration; and

if material of consecutive segments is less than the predetermined duration, creating a virtual segment that includes material from one segment and a next segment of consecutive segments, and

updating the playlist to refer to the virtual segment.

10. The method as set forth in claim 9, wherein each segment points to a storage location where corresponding material is stored.

11. The method as set forth in claim 9 further comprising the step of storing virtual segment material in a cache.

12. The method as set forth in claim 9, wherein the step of creating a virtual segment comprises the step of combining material from the one segment and at least a portion of material from the next segment to form one material, the combination of the material from the one segment and the material portion of the next segment being sufficiently large such that the duration of the virtual segment material is of a duration greater than the predetermined duration.

13. The method as set forth in claim 9, wherein the step of creating a virtual segment comprises the step of combining material of the one segment and the next segment to form one virtual segment material.

14. The method as set forth in claim 9, wherein the step of updating the playlist comprises the step of replacing the one and next segment with the virtual segment.

15. A media processing system comprising a processor device coupled to receive a playlist a plurality of material, said segments corresponding to portions of material, said processor device configured to evaluate the playlist to determine if material of a segment is less than a predetermined duration and to create a virtual segment that includes material from one segment and a next segment of consecutive segments and update the playlist to refer to the virtual segment if the one segment is less than the predetermined duration.

16. The media processing system as set forth in claim 15, further comprising a cache to store material of virtual segments.

17. The media processing system as set forth in claim 15, wherein each virtual segment comprises a pointer that points to a storage location where corresponding material is stored.

18. The media processing system as set forth in claim 15, wherein the predetermined duration is an amount of time corresponding to the amount of time needed to retrieve and begin play of material of the next segment.

19. The media processing system as set forth in claim 15, wherein the processor is further configured to update the playlist by replacing the one and next segment with the virtual segment.

20. The media processing system as set forth in claim 15, wherein if virtual segment data pre-exists, said processor device further configured to re-use the corresponding pre-existing virtual segment and material.

21. A computer readable medium containing executable instructions which, when executed in a processing system, causes the system to perform the steps for optimizing execution of a playlist comprising:

receiving a play list, said play list comprising a plurality of segments, the segment corresponding to different portions of material;

determining if material corresponding to one of a plurality of consecutive segments is less than a predetermined duration;

if material of one of a plurality of consecutive segments is less than the predetermined duration creating a virtual segment of material of consecutive segments including the one segment and updating the playlist to refer to the virtual segment.

22. The computer readable medium as set forth in claim 21, wherein the instruction for creating a virtual segment comprises instructions that combine material from the one segment and at least a portion of material from the next segment to form one virtual segment, the combination of the material from the one segment and the material portion of the next segment being sufficiently large such that the duration of the virtual segment material is greater than the predetermined duration.

23. The computer readable medium as set forth in claim 21, wherein the instruction for creating a virtual segment comprises instructions that combine material of the one segment and the next segment to form one virtual segment material.