METHOD OF DERIVING MOTION INFORMATION

摘要

Provided is a method extracts a merge index from a bit stream, constructs a merge candidate list using available spatial and temporal merge candidates, selects a merge predictor among merge candidates using the merge index, and sets motion information of the merge predictor as motion information of the current prediction unit. The temporal merge candidate includes a reference picture index and a motion vector, and a motion vector of a temporal merge candidate block of a temporal merge candidate picture is set as the motion vector of the temporal merge candidate. Accordingly, the coding efficiency of the motion information is improved by including various merge candidates. Also, the computational complexity of an encoder and a decoder is reduced maintaining improvement of coding efficiency by adaptively storing motion information of reference picture and adaptively generating a temporal merge candidate.

主权项

1. A method of generating prediction block using merge mode, the method comprising:
generating a quantized block by inverse-scanning quantized coefficient components; generating a transformed block by inverse-quantizing the quantized block using a quantization parameter; generating a residual block by inverse-transforming the transformed block; constructing a merge list using available spatial and temporal merge candidates; setting a merge candidate on the merge list specified by a merge index as motion information of a current prediction unit; generating a prediction block of the current prediction unit using the motion information; generating a reconstructed block using the prediction block and the residual block, wherein a motion vector of the temporal merge candidate is a motion vector of a temporal merge candidate block within a temporal merge candidate picture, and a position of the temporal merge candidate block is determined depending on a position of the current prediction unit within an large coding unit (LCU), and wherein the temporal merge candidate block is selected among a first block outside of a block corresponding to the current prediction unit in the temporal merge candidate picture and a second block inside the block corresponding to the current prediction unit in the temporal merge candidate picture, and wherein the temporal merge candidate block is the second block when the first block is not available, wherein the bin string and the bin are derived from picture parameter set.