SYNTAX FOR MOTION INFORMATION SIGNALING IN VIDEO CODING
In an encoding apparatus or a decoding apparatus, an encoding method or decoding method encodes or decodes a bitstream comprising a unified syntax for coding motion information in video coding providing great flexibility for the mode choices through a large number of available modes related to the motion information. The unified motion information syntax comprises modes for both bi-prediction or uni-prediction and introduces a new skip mode that provides a finer cost granularity.
1 - 17 . (canceled)
18 . A video decoding method comprising:
decoding a block of a video based on signaling information representative of a motion information for the block, the signaling information comprising syntax elements arranged as a syntax tree and comprising an information at the root of the syntax tree to signal that motion information is predicted from a candidate list and, directly after the information at the root of the syntax tree, an index in the candidate list of predictors;
wherein decoding includes predicting motion information from a candidate selected by an index in the candidate list of predictors comprising candidates predicted according to a plurality of modes.
19 . The video decoding method of claim 18 , wherein the signaling information comprises an information representative of a uni-directional prediction mode.
20 . The video decoding method of claim 18 , wherein the signaling information further comprises an information representative of a bi-directional prediction mode where one of the two predictors is a merge candidate and the other one is deduced from the index and the candidate list of predictors.
21 . The video decoding method of claim 18 , wherein the signaling information comprises an information representative of a triangle prediction mode.
22 . The video decoding method of claim 18 , wherein the signaling information comprises an information representative of a multi hypothesis prediction mode.
23 . A video encoding method comprising:
encoding a block of a video and signaling information representative of a motion information for the block, the signaling information comprising syntax elements arranged as a syntax tree and comprising an information at the root of the syntax tree to signal that motion information is predicted from a candidate list and, directly after the information at the root of the syntax tree, an index in the candidate list of predictors;
wherein encoding includes predicting motion information from a candidate selected by an index in the candidate list of predictors comprising candidates predicted according to a plurality of modes.
24 . The video encoding method of claim 23 , wherein the signaling information comprises an information representative of a uni-directional prediction mode.
25 . The video encoding method of claim 23 , wherein the signaling information further comprises an information representative of a bi-directional prediction mode where one of the two predictors is a merge candidate and the other one is deduced from the index and the candidate list of predictors.
26 . The video encoding method of claim 23 , wherein the signaling information comprises an information representative of a triangle prediction mode.
27 . The video encoding method of claim 23 , wherein the signaling information comprises an information representative of a multi hypothesis prediction mode.
28 . A video decoding apparatus comprising a decoder configured to decode a block of a video based on signaling information representative of a motion information for the block, the signaling information comprising syntax elements arranged as a syntax tree and comprising an information at the root of the syntax tree to signal that motion information is predicted from a candidate list and, directly after the information at the root of the syntax tree, an index in the candidate list of predictors; wherein decoding includes predicting motion information from a candidate selected by an index in the candidate list of predictors comprising candidates predicted according to a plurality of modes.
29 . The video decoding apparatus of claim 28 , wherein the signaling information comprises an information representative of a uni-directional prediction mode.
30 . The video decoding apparatus of claim 28 , wherein the signaling information further comprises an information representative of a bi-directional prediction mode where one of the two predictors is a merge candidate and the other one is deduced from the index and the candidate list of predictors.
31 . The video decoding apparatus of claim 28 , wherein the signaling information comprises an information representative of a triangle prediction mode or of a multi hypothesis prediction mode.
32 . A video encoding apparatus comprising an encoder configured to encode a block of a video and signaling information representative of a motion information for the block, the signaling information comprising syntax elements arranged as a syntax tree and comprising an information at the root of the syntax tree to signal that motion information is predicted from a candidate list and, directly after the information at the root of the syntax tree, an index in the candidate list of predictors; wherein encoding includes predicting motion information from a candidate selected by an index in the candidate list of predictors comprising candidates predicted according to a plurality of modes.
33 . The video encoding apparatus of claim 32 , wherein the signaling information comprises an information representative of a uni-directional prediction mode.
34 . The video encoding apparatus of claim 32 , wherein the signaling information further comprises an information representative of a bi-directional prediction mode where one of the two predictors is a merge candidate and the other one is deduced from the index and the candidate list of predictors.
35 . The video encoding apparatus of claim 32 , wherein the signaling information comprises an information representative of a triangle prediction mode or of a multi hypothesis prediction mode.
36 . A non-transitory computer readable medium comprising program code instructions for decoding a block of a video based on signaling information representative of a motion information for the block, the signaling information comprising syntax elements arranged as a syntax tree and comprising an information at the root of the syntax tree to signal that motion information is predicted from a candidate list and, directly after the information at the root of the syntax tree, an index in the candidate list of predictors; wherein decoding includes predicting motion information from a candidate selected by an index in the candidate list of predictors comprising candidates predicted according to a plurality of modes, when executed on a processor.
37 . A non-transitory computer readable medium comprising program code instructions for encoding a block of a video and signaling information representative of a motion information for the block, the signaling information comprising syntax elements arranged as a syntax tree and comprising an information at the root of the syntax tree to signal that motion information is predicted from a candidate list and, directly after the information at the root of the syntax tree, an index in the candidate list of predictors; wherein encoding includes predicting motion information from a candidate selected by an index in the candidate list of predictors comprising candidates predicted according to a plurality of modes, when executed on a processor.