MANAGEMENT OF PICTURE REFERENCING IN VIDEO STREAMS FOR PLURAL PLAYBACK MODES
First Claim
Patent Images
1. A method, comprising:
- receiving at a video stream receive-and-process (VSRP) device a transport stream including a video stream having plural compressed pictures, one or more of the plural compressed pictures associated with one or more respective reference picture lists and one or more reference picture reordering commands (RPRCs), the reference picture lists each comprising an association of reference pictures of a decoded picture buffer (DPB) for a given picture to be decompressed to ascending reference indices of the respective one or more reference picture lists;
for the given picture to be decompressed, modifying the association of a first reference picture of the DPB from a second reference index to a first reference index responsive to the one or more RPRCs, wherein the association of the second reference index to the first reference picture corresponds to a default reference picture list;
associating a second reference picture of the DPB to the second reference index responsive to the one or more RPRCs; and
decompressing the given picture for output during a trick mode operation without decompressing the second reference picture.
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Abstract
In one embodiment, a system, comprising an encoder comprising memory with personal video recording assist (PVRA) logic; and a processor configured to execute the PVRA logic to: provide a reference picture reordering command (RPRC) in association with one or more pictures of a video stream to be received in a video stream receive-and-process (VSRP) device, the RPRC configured to cause the VSRP device to reorder or modify associations of reference pictures to ascending reference indices of a derived, default reference picture list such that lower tier number pictures precede higher tier number pictures in a modified reference picture list used for decoding the one or more pictures.
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Citations
20 Claims
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1. A method, comprising:
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receiving at a video stream receive-and-process (VSRP) device a transport stream including a video stream having plural compressed pictures, one or more of the plural compressed pictures associated with one or more respective reference picture lists and one or more reference picture reordering commands (RPRCs), the reference picture lists each comprising an association of reference pictures of a decoded picture buffer (DPB) for a given picture to be decompressed to ascending reference indices of the respective one or more reference picture lists; for the given picture to be decompressed, modifying the association of a first reference picture of the DPB from a second reference index to a first reference index responsive to the one or more RPRCs, wherein the association of the second reference index to the first reference picture corresponds to a default reference picture list; associating a second reference picture of the DPB to the second reference index responsive to the one or more RPRCs; and decompressing the given picture for output during a trick mode operation without decompressing the second reference picture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system, comprising:
an encoder, comprising; memory with personal video recording assist (PVRA) logic; and a processor configured to execute the PVRA logic to; provide a reference picture reordering command (RPRC) in association with one or more pictures of a video stream to be received in a video stream receive-and-process (VSRP) device, the RPRC configured to cause the VSRP device to reorder or modify associations of reference pictures to ascending reference indices of a derived, default reference picture list such that lower tier number pictures precede higher tier number pictures in a modified reference picture list used for decoding the one or more pictures. - View Dependent Claims (12, 13, 14, 15, 16, 17)
- 18. A video stream receive-and-process (VSRP) device, comprising logic configured to, responsive to reception of one or more modify commands received in a video stream, the one or more modify commands required to generate a default reference picture list, scan a default reference picture list by finding a highest reference index number for which its tier number is greater than a tier number of a current picture to be decoded.
Specification