SUB-PREDICTION UNIT (PU) BASED TEMPORAL MOTION VECTOR PREDICTION IN HEVC AND SUB-PU DESIGN IN 3D-HEVC

摘要

Techniques are described for sub-prediction unit (PU) based motion prediction for video coding in HEVC and 3D-HEVC. In one example, the techniques include an advanced temporal motion vector prediction (TMVP) mode to predict sub-PUs of a PU in single layer coding for which motion vector refinement may be allowed. The advanced TMVP mode includes determining motion vectors for the PU in at least two stages to derive motion information for the PU that includes different motion vectors and reference indices for each of the sub-PUs of the PU. In another example, the techniques include storing separate motion information derived for each sub-PU of a current PU predicted using a sub-PU backward view synthesis prediction (BVSP) mode even after motion compensation is performed. The additional motion information stored for the current PU may be used to predict subsequent PUs for which the current PU is a neighboring block.

主权项

1. A method of processing video data comprising:
determining a first stage motion vector for a prediction unit (PU) of a coding unit (CU) of a video block from neighboring blocks of the PU as a first stage of an advanced temporal motion vector prediction (TMVP) mode, wherein the first stage motion vector identifies a block of a reference picture corresponding to the PU; partitioning the PU into two or more sub-PUs; determining second stage motion information for each of the sub-PUs from the block of the reference picture identified by the first stage motion vector as a second stage of the advanced TMVP mode, wherein the second stage motion information for each of the sub-PUs includes at least one motion vector and an associated reference index; and performing motion compensation for each of the sub-PUs separately based on the second stage motion information for each of the sub-PUs.