System and method for reproducing a video session using accelerated frame playback

• US 7,027,708 B2
• Filed: 12/29/2000
• Issued: 04/11/2006
• Est. Priority Date: 12/29/2000
• Status: Expired due to Fees

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: etalk Corporation (HP Inc.)
• Inventors: Nygren, Blair E., Hart, Jonathan B., Shah, Abhay S.
• Primary Examiner(s): Groody, James J.
• Assistant Examiner(s): ONUAKU, CHRISTOPHER O
• Application Number:
  US09/751,039
• Publication Number:
  US 20020106190A1
• Time in Patent Office: 1,929 Days
• Field of Search: 386/39, 386/46, 386 68- 70, 386/81, 386/82, 386/125, 386/126, 348/552, 348/14.08, 379/112.01, 379/30, 382/166, 725 88- 90, 725/134, 375/240.21
• US Class Current: 386/353
• CPC Class Codes: H04N 19/503 involving temporal prediction adaptive coding with adaptive selection between spatial and temporal predictive coding H04N19/107; adaptive coding with adaptive selection among a plurality of temporal predictive coding modes H04N19/109
• CPC Class Codes: H04N 21/21 Server components or server architectures
• CPC Class Codes: H04N 21/23 Processing of content or additional data; Elementary server operations; Server middleware
• CPC Class Codes: H04N 21/4331 Caching operations, e.g. of an advertisement for later insertion during playback

Abstract

A client for reproducing a video session includes a memory and a processor coupled to the memory. The memory stores a first video frame that includes first video data, a first video sub-frame comprising second video data that is different from the first video data, and a second video sub-frame comprising third video data. The processor generates a second video frame using the first video frame and the first video sub-frame, wherein the third video data is different from the video data of the second video frame. The processor further generates a third video frame using the second video frame and the second video sub-frame, and displays the first video frame.

Claims

1. A method for reproducing a video session, comprising:

storing a first video frame that includes first video data;

storing a first video sub-frame comprising second video data that is different from the first video data;

generating a second video frame using the first video frame and the first video sub-frame;

storing a second video sub-frame comprising third video data that is different from the video data of the second video frame;

generating a third video frame using the second video frame and the second video sub-frame;

storing a fourth video frame comprising fourth video data;

storing a third video sub-frame comprising fifth video data that is different from the fourth video data;

generating a fifth video frame using the fourth video frame and the third video sub-frame;

wherein each of the first video frame and the fourth video frame are generated using a corresponding key frame, each key frame is associated with a time interval, and each video sub-frame is associated with a time interval subsequent to the time interval of at least one key frame, the method further comprising;

receiving a command to initiate reproduction of the video session from a particular video sub-frame associated with a selected time interval;

determining a key frame associated with a time interval that is prior to the selected time interval;

generating a video frame using at least the determined key frame and the particular video sub-frame; and

displaying the generated video frame.

2. The method of claim 1, further comprising generating a predetermined number of video frames for storage in a queue prior to displaying the first video frame.

3. The method of claim 1, wherein:

the particular video sub-frame comprises the third video sub-frame; and

the determined key frame comprises the fourth video frame.

4. The method of claim 1, further comprising determining a video sub-frame associated with a time interval between the time interval of the determined key frame and the selected time interval, wherein the step of generating comprises generating the video frame using the determined key frame, the particular video sub-frame, and the determined video sub-frame.

5. The method of claim 4, wherein:

the particular video sub-frame comprises the second video sub-frame;

the determined key frame comprises the first video frame; and

the determined video sub-frame comprises the first video sub-frame.

6. The method of claim 1, wherein the time interval of the determined key frame is nearest to the selected time interval among the time intervals of key frames that are prior to the selected time interval.

7. The method of claim 1, wherein the command comprises a fast-forward command.

8. The method of claim 1, wherein the command comprises a rewind command.

9. The method of claim 1, wherein displaying is synchronized with the reproduction of a voice session associated with the video session.

10. A client for reproducing a video session, comprising:

a memory operable to store a first video frame that includes first video data, a first video sub-frame comprising second video data that is different from the first video data, a second video sub-frame comprising third video data, a fourth video frame comprising fourth video data, and a third video sub-frame comprising fifth video data that is different from the fourth video data; and

a processor coupled to the memory and operable to;

generate a second video frame using the first video frame and the first video sub-frame, wherein the third video data is different from the video data of the second video frame;

generate a third video frame using the second video frame and the second video sub-frame;

generate a fifth video frame using the fourth video frame and the third video sub-frame;

wherein each of the first video frame and the fourth video frame are generated using a corresponding key frame, each key frame is associated with a time interval, and each video sub-frame is associated with a time interval subsequent to the time interval of at least one key frame, the processor further operable to;

receive a command to initiate reproduction of the video session from a particular video sub-frame associated with a selected time interval;

determine a key frame associated with a time interval that is prior to the selected time interval;

generate a video frame using at least the determined key frame and the particular video sub-frame; and

display the generated video frame.

11. The client of claim 10, wherein the memory is further operable to store a predetermined number of video frames in a queue and the processor is further operable to display a portion of the video frames stored in the queue.

12. The client of claim 10, wherein:

the particular video sub-frame comprises the third video sub-frame; and

the determined key frame comprises the fourth video frame.

13. The client of claim 10, wherein the processor is further operable to:

determine a video sub-frame associated with a time interval between the time interval of the determined key frame and the selected time interval; and

generate the video frame using the determined key frame, the particular video sub-frame, and the determined video sub-frame.

14. The client of claim 13, wherein:

the particular video sub-frame comprises the second video sub-frame;

the determined key frame comprises the first video frame; and

the determined video sub-frame comprises the first video sub-frame.

15. The client of claim 10, wherein the time interval of the determined key frame is nearest to the selected time interval among the time intervals of key frames that are prior to the selected time interval.

16. The client of claim 10, wherein the command comprises a fast-forward command.

17. The client of claim 10, wherein the command comprises a rewind command.

18. The client of claim 10, wherein the processor is further operable to synchronize the display of the first video frame with the reproduction of a voice session associated with the video session.

19. A method for reproducing a video session, comprising:

storing a plurality of video frames;

storing a plurality of video sub-frames;

wherein at least a portion of the video frames are associated with a corresponding key frame, each key frame is associated with a time interval, and each video sub-frame is associated with a time interval subsequent to the time interval of at least one key frame, the method further comprising;

receiving a command to initiate reproduction of the video session from a particular video sub-frame associated with a selected time interval;

determining a key frame associated with a time interval that is prior to the selected time interval;

generating a video frame using at least the determined key frame and the particular video sub-frame; and

displaying the generated video frame.

20. The method of claim 19, further comprising determining a video sub-frame associated with a time interval between the time interval of the determined key frame and the selected time interval, wherein the step of generating comprises generating the video frame using the determined key frame, the particular video sub-frame, and the determined video sub-frame.

21. The method of claim 19, wherein the time interval of the determined key frame is nearest to the selected time interval among the time intervals of key frames that are prior to the selected time interval.

22. The method of claim 19, wherein the command comprises a fast-forward command.

23. The method of claim 19, wherein the command comprises a rewind command.

24. The method of claim 19, wherein displaying is synchronized with the reproduction of a voice session associated with the video session.