US 11,445,197 B2Granted

Video decoder with enhanced CABAC decoding

AssigneeHuawei Technologies Co., Ltd.

InventorsKiran Misra, Christopher A. Segall

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Abstract

A decoder receives a bitstream containing quantized coefficients representative of blocks of video representative of a plurality of pixels and decodes the bitstream using context adaptive binary arithmetic coding. The context adaptive binary arithmetic coding decodes the current syntax element using the first mode if the current syntax element is intra-coded and selecting between a first set of probable modes and a second set of probable modes, where the first set of probable modes are more likely than the second set of probable modes. The context adaptive binary arithmetic coding decodes the current syntax element using the second mode if the current syntax element is intra-coded and if selecting among one of the second set of probable modes.

Claims9

Dependent claims

A decoder for decoding a prediction mode of a current block, wherein the decoder comprises a regular decoding engine and a bypass decoding engine, the regular decoding engine is used for arithmetic decoding using a context, the bypass decoding engine is used for arithmetic decoding with a bypass decoding process, and wherein the decoder is configured to:

decode a first indicator using the regular decoding engine;
decode a second indicator using the bypass decoding engine to select the prediction mode of the current block, wherein the prediction mode of the current block is selected from a set of most probable modes when a value of the first indicator is equal to a first value, wherein the set of most probable modes comprises one or more candidate prediction modes generated according to prediction modes of one or more adjacent blocks of the current block;
decode a third indicator using the bypass decoding engine to select the prediction mode of the current block, wherein the prediction mode of the current block is not selected from a set of most probable modes when a value of the first indicator is equal to a second value, the second value is different from the first value.

Dependencies are inferred from the claim text.

Facts

Application: 17/244,371Filed 29 Apr 2021 · continuation
Priority: 7 Nov 2011
Published: US 2021/0321108 A114 Oct 2021
Granted: 13 Sep 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

H04N 19/13
Characterised by the element, parameter or selection affected or controlled by the adaptive coding: adaptive entropy coding, e.g. adaptive…
H04N 19/117
Characterised by the element, parameter or selection affected or controlled by the adaptive coding: filters, e.g. for pre-processing or…
H04N 19/124
Characterised by the element, parameter or selection affected or controlled by the adaptive coding: quantisation
H04N 19/15
Data rate or code amount at the encoder output: by monitoring actual compressed data size at the memory before deciding storage at the…

Family

Application13/291,015Parent of this continuation · filed 7 Nov 2011
Application14/691,674Parent of this continuation · filed 21 Apr 2015
US 9,088,796 B2Parent of this continuation · filed 21 Jul 2015
Application15/254,730Parent of this continuation · filed 1 Sep 2016
US 9,516,343 B2Parent of this continuation · filed 6 Dec 2016
Application15/861,089Parent of this continuation · filed 3 Jan 2018
US 9,930,337 B2Parent of this continuation · filed 27 Mar 2018
Application16/160,359Parent of this continuation · filed 15 Oct 2018
US 10,136,137 B2Parent of this continuation · filed 20 Nov 2018
US 11,006,115 B2Parent of this continuation · filed 11 May 2021
US 2021/0321108 A1Pre-grant publication · published 14 Oct 2021
US 2013/0114668 A1Published application
US 2015/0229964 A1Published application
US 2017/0041612 A1Published application
US 2018/0131940 A1Published application
US 2019/0052884 A1Published application
US 11,445,197 B2This patent

From the US filing history. Foreign family members aren’t listed.

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