Method and apparatus for processing digital data
First Claim
Patent Images
1. A method in a data processing system for synchronizing audio data and video data in a data stream, wherein the video data includes a plurality of frames associated with a plurality of frames types, the method comprising:
- identifying a synchronization process for the data stream using the plurality of frames and the associated plurality frame types, wherein the synchronization process is identified based on a speed of the apparatus, within the data processing system, processing the data stream; and
selectively decoding the plurality of frames using the identified synchronization process.
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Abstract
A method and apparatus for synchronizing a data stream that contains video data in which the video data includes frames. As frames are being processed, a number of frames processed is identified along with a number of frames dropped during processing. A synchronization speed is identified using the number of frames processed and the number of frames dropped. A frame is selectively dropped from the data stream based on the synchronization speed.
173 Citations
39 Claims
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1. A method in a data processing system for synchronizing audio data and video data in a data stream, wherein the video data includes a plurality of frames associated with a plurality of frames types, the method comprising:
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identifying a synchronization process for the data stream using the plurality of frames and the associated plurality frame types, wherein the synchronization process is identified based on a speed of the apparatus, within the data processing system, processing the data stream; and
selectively decoding the plurality of frames using the identified synchronization process.
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2. A method in a data processing system for synchronizing video data in a data stream including video data wherein the video data includes a plurality of frames identified by a plurality of frame types in which each frame within the plurality of frames is associated with a frame type from the plurality of frames, the method comprising:
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identifying a synchronization speed using the plurality of frames associated with the plurality of frame types; and
selectively decoding the plurality of frames based on the identified synchronization speed and the plurality of frame types. - View Dependent Claims (3, 4, 5)
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6. A method in a data processing system for synchronizing video data in a data stream, wherein the data stream is an MPEG data stream, including video data, wherein the video data includes a plurality of frames identified by a plurality of frame types in which each frame within the plurality of frames is associated with a frame type from the plurality of frames, the method comprising:
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identifying a synchronization speed using the plurality of frames associated with the plurality of frame types;
selectively decoding the plurality of frames based on the identified synchronization speed; and
wherein the plurality of fame types include B frames, I frames, and P frames and wherein the step of selectively decoding the plurality of frames based on the identified synchronization speed comprises dropping all frames if the synchronization speed is slow.
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7. A method in a data processing system for synchronizing video data in a data stream, wherein the data stream is an MPEG data stream, including video data, wherein the video data includes a plurality of frames identified by a plurality of frame types in which each frame within the plurality of frames is associated with a frame type from the plurality of frames, the method comprising:
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identifying a synchronization speed using the plurality of frames associated with the plurality of frame types;
selectively decoding the plurality of frames based on the identified synchronization speed, wherein the plurality of fame types include B frames, I frames, and P frames and wherein the step of selectively decoding the plurality of frames based on the identified synchronization speed comprises dropping all frames if the synchronization speed is slow; and
wherein the synchronization speed is slow if a percentage of dropped frames is equal to or greater than sixty-five percent.
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8. A method in a data processing system for synchronizing video data in a data stream, wherein the data stream is an MPEG data stream, including video data, wherein the video data includes a plurality of frames identified by a plurality of frame types in which each frame within the plurality of frames is associated with a frame type from the plurality of frames, the method comprising:
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identifying a synchronization speed using the plurality of frames associated with the plurality of frame types;
selectively decoding the plurality of frames based on the identified synchronization speed; and
wherein the plurality of frame types include B frames, I frames, and P frames and wherein the step of selectively decoding the plurality of frames based on the identified synchronization speed comprises dropping only P frames and B frames if the synchronization speed is medium.
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9. A method in a data processing system for synchronizing video data in a data stream, wherein the data stream is an MPEG data stream, including video data, wherein the video data includes a plurality of frames identified by a plurality of frame type in which each frame within the plurality of frames is associated with a frame type from the plurality of frames, the method comprising:
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identifying a synchronization speed using the plurality of frames associated with the plurality of frame types;
selectively decoding the plurality of frames based on the identified synchronization speed;
wherein the plurality of frame type, include B frames, I frames, and P frames and wherein the step of selectively decoding the plurality of frames based on the identified synchronization speed comprises dropping only P frames and B frames if the synchronization speed is medium; and
wherein the synchronization speed is medium if the percentage of dropped frames is in a range from thirty-five percent to sixty-five percent.
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10. A method in a data processing system for synchronizing video data in a data stream, wherein the data stream is an MPEG data stream, including video data, wherein the video data includes a plurality of frames identified by a plurality of frame types in which each frame within the plurality of frames is associated with a frame type from the plurality of frames, the method comprising:
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identifying a synchronization speed using the plurality of frames associated with the plurality of frame types;
selectively decoding the plurality of frames based on the identified synchronization speed; and
wherein the plurality of frame types include B frames, I frames, and P frames and wherein the step of selectively decoding the plurality of frames based on the identified synchronization speed comprises dropping only graphical object B frames if the synchronization speed is fast.
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11. A method in a data processing system for synchronizing video data in a data stream, wherein the data stream is an MPEG data stream, including video data, wherein the video data includes a plurality of frames identified by a plurality of frame types in which each frame within the plurality of frames is associated with a frame type from the plurality of frames, the method comprising:
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identifying a synchronization speed using the plurality of frames associated with the plurality of frame types;
selectively decoding the plurality of frames based on the identified synchronization speed, wherein the plurality of frame types include B frames, I frames, and P frames and wherein the step of selectively decoding the plurality of frames based on the identified synchronization speed comprises dropping only graphical object B frames if the synchronization speed is fast; and
wherein the synchronization speed is fast if the percentage of dropped frames is in a range from zero percent to thirty-five percent.
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12. A method for synchronizing a data stream including data, wherein the video data includes a plurality of frames having a plurality of frame types, the method comprising:
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processing frames from the plurality of frames;
determining a number of frames processed;
determining a number of frames dropped during processing;
identifying a synchronization speed using the number of frames processed and the number of frames dropped; and
selectively dropping a frame in the data stream based on the synchronization speed and a frame type associated with the frame. - View Dependent Claims (13, 17)
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14. A method for synchronizing a data stream including video data, wherein the video data includes a plurality of frames, the method comprising:
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processing frames from the plurality of frames;
determining a number of frames processed;
determining a number of frames dropped during processing;
identifying a synchronization speed using the number of frames processed and the number of frames dropped;
selectively dropping a frame in the data stream based on the synchronization speed; and
wherein the plurality of video frames includes I frames, B frames, and P frames, and wherein the step of selectively dropping frames comprises dropping all frames.
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15. A method for synchronizing a data stream including video data, wherein the video data includes a plurality of frames, the method comprising:
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processing frames from the plurality of frames;
determining a number of frames processed;
determining a number of frames dropped during processing;
identifying a synchronization speed using the number of frames processed and the number of frames dropped;
selectively dropping a frame in the data stream based on the synchronization speed; and
wherein the plurality of frames includes I frames, B frames, and P frames, and wherein the step of selectively dropping frames comprises dropping only B frames and P frames.
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16. A method for synchronizing a data stream including video data, wherein the video data includes a plurality of frames, the method comprising:
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processing frames from the plurality of frames;
determining a number of frames processed;
determining a number of frames dropped during processing;
identifying a synchronization speed using the number of frames processed and the number of frames dropped;
selectively dropping a frame in the data stream based on the synchronization speed; and
wherein the plurality of frames includes I frames, B frames, and P frames, and wherein the step of selectively dropping frames comprises dropping only B frames.
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18. A data processing system for synchronizing audio data and video data in a data stream, wherein the video data includes a plurality of frames associated with a plurality of frame types, the data processing system comprising:
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identification means for identifying a synchronization process for the data stream using the plurality of frames and the associated plurality of frame types, wherein the synchronization process is identified based on a speed of the apparatus, within the data processing system, processing the data stream; and
decoding means for selectively decoding the plurality of frames using the identified synchronization process. - View Dependent Claims (19)
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20. An apparatus for synchronizing audio data and video data in a data stream, the apparatus comprising:
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reception means for receiving the data stream, wherein the video data in the data stream includes a plurality of frames identified by plurality of frame types in which each frame within the plurality of frames is associated with a frame type from the plurality of frames;
identification means for identifying a synchronization speed using the plurality of frames associated with the plurality frame types; and
decoding means for selectively decoding the plurality of frames based on the identified synchronization speed and the plurality of frame types. - View Dependent Claims (21, 22, 23, 24)
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25. An apparatus for synchronizing audio data and video data in a data stream, the apparatus comprising:
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reception means for receiving the data stream, wherein the video data in the data stream includes a plurality of frames identified by plurality of frame types in which each frame within the plurality of frames is associated with a frame type from the plurality of frames;
identification means for identifying a synchronization speed using the plurality of frames associated with the plurality frame types;
decoding means for selectively decoding the plurality of frames based on the identified synchronization speed; and
wherein the plurality of frame types includes B frames, I frames, and P frames and wherein the decoding means drops all frames if the synchronization speed is slow.
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26. An apparatus for synchronizing audio data and video data in a data stream, the apparatus comprising:
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reception means for receiving the data stream, wherein the video data in the data stream includes a plurality of frames identified by plurality of frame types in which each frame within the plurality of frames is associated with a frame type from the plurality of frames;
identification means for identifying a synchronization speed using the plurality of frames associated with the plurality frame types;
decoding means for selectively decoding the plurality of frames based on the identified synchronization speed;
wherein the plurality of frame types includes B frames, I frames, and P frames and wherein the decoding means drops all frames if the synchronization speed is slow; and
wherein the synchronization speed is slow if a percentage of dropped frames is equal to or greater than sixty-five percent.
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27. An apparatus for synchronizing audio data and video data in a data stream, the apparatus comprising:
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reception means for receiving the data stream, wherein the video data in the data stream includes a plurality of frames identified by plurality of frame types in which each frame within the plurality of frames is associated with a frame type from the plurality of frames;
identification means for identifying a synchronization speed using the plurality of frames associated with the plurality frame types;
decoding means for selectively decoding the plurality of frames based on the identified synchronization speed; and
wherein the plurality of frame types include B frames, I frames, and P frames and wherein the decoding means drops only P frames and B frames if the synchronization speed is medium.
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28. An apparatus for synchronizing audio data and video data in a data stream, the apparatus comprising:
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reception means for receiving the data stream, wherein the video data in the data stream includes a plurality of frames identified by plurality of frame types in which each frame within the plurality of frames is associated with a frame type from the plurality of frames;
identification means for identifying a synchronization speed using the plurality of frames associated with the plurality frame types;
decoding means for selectively decoding the plurality of frames based on the identified synchronization speed;
wherein the plurality of Same types include B frames, I frames, and P frames and wherein the decoding means drops only P frames and B frames if the synchronization speed is medium; and
wherein the synchronization speed is medium if the percentage of dropped frames is in a range from thirty-five percent to sixty-five percent.
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29. An apparatus for synchronizing audio data and video data in a data stream, the apparatus comprising:
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reception means for receiving the data stream, wherein the video data in the data stream includes a plurality of frames identified by plurality of frame types in which each if frame within the plurality of frames is associated with a frame type from the plurality of frames;
identification means for identifying a synchronization speed using the plurality of frames associated with the plurality frame types;
decoding means for selectively decoding the plurality of frames based on the identified synchronization speed; and
wherein the plurality of frame types includes B frames, frames, and P frames and wherein the decoding means drops only B frames if the synchronization speed is fast.
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30. An apparatus for synchronizing audio data and video data in a data stream, the apparatus comprising:
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reception means for receiving the data stream, wherein the video data in the data stream includes a plurality of frames identified by plurality of frame types in which each frame within the plurality of frames is associated with a frame type from the plurality of frames;
identification means for identifying a synchronization speed using the plurality of frames associated with the plurality frame types;
decoding means for selectively decoding the plurality of frames based on the identified synchronization speed;
wherein the plurality of frame types includes B frames, I frames, and P frames and wherein the decoding means drops only B frames if the synchronization speed is fast; and
wherein the synchronization speed is fast if the percentage of dropped frames is in a range from zero percent to thirty-five percent.
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31. An apparatus for processing video data in a data stream, the apparatus comprising:
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receiving means for receiving the data stream, wherein the video data in the data stream includes a plurality of frames having a plurality of frame types;
processing means for processing frames from the plurality of frames;
first determination means for determining a number of frames processed;
second determination means for determining a number of frames dropped during processing;
identification means for identifying a synchronization speed suing the number of frames processed and the number of frames dropped; and
dropping means for selectively dropping a frame in the data stream based on the synchronization speed and a frame type associated with the frame. - View Dependent Claims (32, 36, 37, 38)
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33. An apparatus for processing video data in a data stream, the apparatus comprising:
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receiving means for receiving the data stream, wherein the video data in the data stream includes a plurality of frames;
processing means for processing frames from the plurality of frames;
first determination means for determining a number of frames processed;
second determination means for determining a number of frames dropped during processing;
identification means for identifying a synchronization speed using the number of frames processed and the number of frames dropped;
dropping means for selectively dropping a frame in the data stream based on the synchronization speed; and
wherein the plurality of video frames includes I frames, B frames, and P frames and wherein the dropping means drops all frames for a selected portion of the data stream.
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34. An apparatus for processing video data in a data stream, the apparatus comprising:
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receiving means for receiving the data stream, wherein the video data in the data stream includes a plurality of frames;
processing means for processing frames from the plurality of frames;
first determination means for determining a number of frames processed;
second determination means for determining a number of frames dropped during processing;
identification means for identifying a synchronization speed using the number of frames processed and the number of frames dropped;
dropping means for selectively dropping a frame in the data stream based on the synchronization speed; and
wherein the plurality of frames includes I frames, B frames, and P frames and wherein the dropping means drops only B frames and P frames within a selected portion of the data stream.
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35. An apparatus for processing video data in a data stream, the apparatus comprising:
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receiving means for receiving the data stream, wherein the video data in the data stream includes a plurality of frames;
processing means for processing frames from the plurality of frames;
first determination means for determining a number of frames processed;
second determination means for determining a number of frames dropped during processing;
identification means for identifying a synchronization speed using the number of frames processed and the number of frames dropped;
dropping means for selectively dropping a frame in the data stream based on the synchronization speed; and
wherein the plurality of frames includes I frames, B frames, and P frames and wherein the dropping means drops only B frames within a selected portion of the data stream.
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39. A computer program product for use in a data processing stream for processing video data in a data steam, the computer program product comprising:
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a computer usable medium;
first instructions for receiving the data stream, wherein the video data includes a plurality of frames;
second instructions for processing frames from the plurality of frames;
third instructions for determining a number of frames processed;
fourth instructions for determining a number of frames dropped during processing;
fifth instructions for identifying a synchronization speed using the number of frames processed and the number of frames dropped; and
sixth instructions for selectively dropping a frame in the data processing system based on the synchronization speed, wherein the instructions are embodied within the computer usable medium.
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Specification