Random access point (RAP) formation using intra refreshing technique in video coding
AssigneeSony Computer Entertainment Inc.
InventorHung-Ju Lee
Life of this patent
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Abstract
A random access point can be generated in a stream of coded digital pictures containing a plurality of predictive coded frames in which one or more subsections of each frame are intra coded. A patch frame can be formed from intra-coded subsections in identified consecutive predictive-coded frames. The patch frame can be used as a synthetic random access point.
Claims26
A method for generating a random access point from a stream of coded digital pictures containing a plurality of predictive coded frames, the plurality of predictive coded frames having two or more predictive coded frames in which one or more subsections of each of the two or more predictive coded frames are intra coded, the method comprising:
- a) identifying two or more consecutive predictive-coded frames in the stream that each contain one or more intra-coded subsections from different portions with a processor module;
- and
- b) forming a patch frame by combining the intra-coded subsections from the different portions of the two or more consecutive predictive-coded frames identified in a) into the patch frame with the processor module.
An apparatus for generating a random access point in a stream of coded digital pictures containing a plurality of predictive coded frames, the plurality of predictive coded frames having two or more predictive coded frames in which one or more subsections of each of the two or more predictive coded frames are intra coded, the apparatus comprising:
- a processor;
- a memory;
- and
- computer coded instructions embodied in the memory and executable by the processor, wherein the computer coded instructions are configured to implement a method for encoding a digital picture upon execution by the processor, the method comprising:
- a) identifying two or more consecutive predictive-coded frames in the stream that each contain one or more intra-coded subsections from different portions;
- and
- b) forming a patch frame by combining the intra-coded subsections from the different portions of the two or more consecutive predictive-coded frames identified in a) into the patch frame.
A non-transitory computer-readable medium having embodied therein coded instructions executable by a computer processor, the computer coded instructions being configured to implement a method for generating a random access point in a stream of coded digital pictures containing a plurality of predictive coded frames, the plurality of predictive coded frames having two or more predictive coded frames in which one or more subsections of each of the two or more predictive coded frames are intra coded, comprising, the method comprising:
- a) identifying two or more consecutive predictive-coded frames in the stream that each contain one or more intra-coded subsections from different portions;
- and
- b) forming a patch frame by combining the intra-coded subsections from the different portions of the two or more consecutive predictive-coded frames identified in a) into the patch frame.
A method for generating a random access point in a stream of coded digital pictures containing a plurality of predictive coded frames, the plurality of predictive coded frames having two or more predictive coded frames in which one or more subsections of each of the two or more predictive coded frames are intra coded, the method comprising:
- a) predictive coding two or more consecutive frames into a stream of digital pictures, wherein each of the two or more different predictive-coded frames contains one or more intra-coded subsections from different portions;
- and
- b) adding information to the stream, wherein the information identifies for a decoder which of the two or more consecutive predictive-coded frames have intra-coded subsections at different portions which can be combined to form a patch frame.
Dependencies are inferred from the claim text.