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US 10,708,608 B2Granted
Layer based HRD buffer management for scalable HEVC
AssigneeSony Corporation
InventorsAli Tabatabai, Kazushi Sato, Shinobu Hattori, Teruhiko Suzuki
Life of this patent
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Abstract
The buffer management methods simplify the complexity of STD buffer management for HEVC and make is easy to implement HEVC in deployed AVC/MPEG-2 networks (as legacy re-multiplexers are able to be used for re-purposing HEVC content). The buffers for base and enhancement layers are also be managed independently before re-assembly and this simplifies the STD model. Re-assembly is still implemented before decoding an enhanced HEVC video stream.
Claims12
A method, comprising:
- in a decoder system:
- accessing a video bitstream that includes a base layer bitstream and a combined base and enhancement layer bitstream,
- wherein the base layer bitstream and the combined base and enhancement layer bitstream include hypothetical reference decoder parameters for each layer, and
- wherein the hypothetical reference decoder parameters comprise at least one of a bit rate or a Coded Picture Buffer (CPB) size;
- decoding the video bitstream,
- wherein a first buffer for the base layer bitstream and a second buffer for the combined base and enhancement layer bitstream are managed independently based on respective hypothetical reference decoder parameters;
- utilizing a same picture timing supplemental enhancement information message for each of the base layer bitstream and the combined base and enhancement layer bitstream, for synchronization of removal times such that a number of bits that is present in the video bitstream are counted to decode a particular set of bits of the video bitstream;
- and
- utilizing a first buffering period supplemental enhancement information message for the base layer bitstream.
6 more elements
A decoder system, comprising:
- at least one processor configured to:
- access a video bitstream that includes a base layer bitstream and a combined base and enhancement layer bitstream,
- wherein the base layer bitstream and the combined base and enhancement layer bitstream include hypothetical reference decoder parameters for each layer, and
- wherein the hypothetical reference decoder parameters comprise at least one of a bit rate or a Coded Picture Buffer (CPB) size;
- a decoder configured to decode the video bitstream,
- wherein a first buffer for the base layer bitstream and a second buffer for the combined base and enhancement layer bitstream are managed independently based on respective hypothetical reference decoder parameters;
- utilize a same picture timing supplemental enhancement information message for each of the base layer bitstream and the combined base and enhancement layer bitstream, for synchronization of removal times such that a number of bits that is present in the video bitstream are counted to decode a particular set of bits of the video bitstream;
- and
- utilize a first buffering period supplemental enhancement information message for the base layer bitstream.
6 more elements
Dependencies are inferred from the claim text.