Tracking and determining pictures in successive interdependency levels
First Claim
Patent Images
1. A method, comprising:
- receiving a video stream comprising a sequence of compressed pictures, the compressed pictures comprising a plurality of levels of picture importance including a first picture level and a second picture level;
performing a first level of tracking of pictures of the received stream to ascertain whether pictures belong to a first level;
performing a second level of tracking of pictures with an ascending presentation time stamp (PTS), wherein performing a second level of tracking of pictures comprises;
ascertaining the first level of pictures based on an indicated adherence to one or more picture independency rules received with the video stream,determining that a predetermined number of first level of pictures have been tracked, andperforming, when the predetermined number of first level pictures have been tracked, the second level tracking of pictures with the ascending PTS; and
classifying pictures immediately subsequent to pictures tracked at the second level of tracking as candidates for a third level of tracking; and
processing the sequence of compressed pictures of the video stream based on whether pictures belong to the first level, the second level, and the third level.
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Abstract
Systems and methods that receive a video stream comprising a sequence of compressed pictures, the compressed pictures comprising a plurality of levels of picture importance including a first picture level and a second picture level, track the compressed pictures to ascertain which of the compressed pictures correspond to the first level, and responsive to ascertaining which of the compressed pictures correspond to the first level, tracking the compressed pictures to ascertain which of the compressed pictures correspond to the second level.
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Citations
20 Claims
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1. A method, comprising:
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receiving a video stream comprising a sequence of compressed pictures, the compressed pictures comprising a plurality of levels of picture importance including a first picture level and a second picture level; performing a first level of tracking of pictures of the received stream to ascertain whether pictures belong to a first level; performing a second level of tracking of pictures with an ascending presentation time stamp (PTS), wherein performing a second level of tracking of pictures comprises; ascertaining the first level of pictures based on an indicated adherence to one or more picture independency rules received with the video stream, determining that a predetermined number of first level of pictures have been tracked, and performing, when the predetermined number of first level pictures have been tracked, the second level tracking of pictures with the ascending PTS; and classifying pictures immediately subsequent to pictures tracked at the second level of tracking as candidates for a third level of tracking; and processing the sequence of compressed pictures of the video stream based on whether pictures belong to the first level, the second level, and the third level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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receiving a video stream comprising a sequence of compressed pictures, the compressed pictures comprising a plurality of levels of picture importance including a first picture level and a second picture level; performing a first level of tracking of RAPs in the received stream; classifying RAPs tracked by the first level of tracking as first level pictures; performing a second level of tracking of pictures with an ascending PTS, wherein performing the second level of tracking comprises; ascertaining the first level pictures based on an indicated adherence to picture independency rules received with the video stream, determining that a predetermined number of the first level pictures have been tracked, and performing, when the predetermined number of the first level pictures have been tracked, the second level of tracking of pictures with the ascending PTS; classifying pictures tracked by the second level of tracking as second level pictures; classifying pictures immediately subsequent to second level pictures as candidates for a third level of tracking; and process the sequence of compressed pictures of the video stream based on whether pictures belong to the first level, the second level, and the third level. - View Dependent Claims (10, 11, 12, 13)
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14. An apparatus, comprising:
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a memory comprising instructions; and one or more processors configured to execute the instructions to cause the one or more processors to; receive a video stream comprising a sequence of compressed pictures, the compressed pictures comprising a plurality of levels of picture importance including a first picture level and a second picture level; perform a first level of tracking of RAPs in the received stream; classify RAPs tracked by the first level of tracking as first level pictures; perform a second level of tracking of pictures with an ascending PTS, wherein the one or more processors being configured to perform the second level of tracking comprises the one or more processors being further configured to; ascertain the first level pictures based on an indicated adherence to picture independency rules received with the video stream, determine that a predetermined number of first level pictures have been tracked, and perform, when the predetermined number of first level pictures have been tracked, the second level tracking of pictures with the ascending PTS; classify pictures tracked by the second level of tracking as second level pictures; and classify pictures immediately subsequent to second level pictures as candidates for a third level, of tracking; and process the sequence of compressed pictures of the video stream based on whether pictures belong to the first level, the second level, and the third level. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification