Lg Electronics (china) R & D Center Co., Ltd

Jie Jia

Hongbin Liu

Embodiments of the present invention provide a method and an apparatus for predicting a residual, which method is applied to three-dimensional video encoding or multi-visual angle video encoding and comprises searching, when performing inter frame image prediction encoding on a prediction unit, a corresponding unit of the prediction unit in an adjacent visual angle encoded at the same time; and predicting a time domain predicted residual of the prediction unit by utilizing a time domain predicted residual of the corresponding unit in the encoded adjacent visual angle. The method is applied to three-dimensional video decoding or multi-visual angle video decoding and comprises judging, when performing inter frame image prediction decoding on a prediction unit, whether the prediction unit adopts a residual prediction; searching, if it is determined the prediction unit adopts the residual prediction, a corresponding unit of the prediction unit in an adjacent visual angle decoded at the same time; and predicting a predicted residual of the prediction unit by utilizing a time domain predicted residual of the corresponding unit in the decoded adjacent visual angle. The present invention improves video compression ratio and enhances encoding/decoding efficiencies.

Method and apparatus for predicting residual

A depth picture inter encoding method, a decoding method, an encoder and a decoder, wherein the depth picture inter encoding method comprises: judging whether a depth picture inter encoding mode is a skip mode; setting a first depth picture inter encoding flag bit to an encoding unit if it is judged that the depth picture inter encoding mode is not the skip mode; judging whether the first depth picture inter encoding flag bit is true, encoding merely one residual value to each prediction unit if it is judged that the first depth picture inter encoding flag bit is true. Encoding by adopting a residual encoding manner existing in 3D-HEVC if it is judged that the first depth picture inter encoding flag bit is false.

Depth picture inter encoding and decoding method, encoder and decoder

This disclosure relates to the field of video coding and decoding technology, and particularly, to a method and an apparatus for coding and decoding videos, wherein the coding method comprises: acquiring available neighboring pixel points which are reconstructed and neighboring to a coding unit; finding a reference block corresponding to the coding unit according to the motion vector of a prediction unit for a pixel attribute in the coding unit, and acquiring corresponding reference pixel points around the reference block; calculating a pixel attribute compensation parameter of the prediction unit using a value of the pixel attribute of the neighboring pixel point and a value of the same pixel attribute of the reference pixel point; and calculating a first prediction value of the prediction unit according to the pixel attribute compensation parameter, and coding the coding unit according to the first prediction value.

Method and apparatus for coding and decoding videos

The embodiments of the present invention provide an intraframe encoding method, device and encoder for depth images. The method is applied to 3D video encoding or multi-view video encoding. The method includes: in an intraframe encoding mode for depth images, generating a non-all-zero residual and an all-zero residual when a prediction unit is encoded; and performing a rate-distortion optimization selection between the non-all-zero residual and the all-zero residual, as a residual encoding scheme of the prediction unit. The device is applied to 3D video encoding or multi-view video encoding. The device includes: a residual generation unit configured to generate, in an intraframe encoding mode for depth images, a non-all-zero residual and an all-zero residual when a prediction unit is encoded; and a rate-distortion optimization selection unit configured to perform a rate-distortion optimization selection between the non-all-zero residual and the all-zero residual, as a residual encoding scheme of the prediction unit.

Intraframe coding method, device and encoder for depth images

The invention discloses an inter picture prediction method for video coding and decoding and a codec. The inter picture prediction method for video coding comprises: performing motion estimation over integer pixel positions of a reference picture, to determine an optimal motion vector for a current prediction unit in a current picture; and performing interpolation filtering processing for motion estimation over fractional pixel position by using the integer pixel position information to which the optimal motion vector directs in the reference picture, and spatially neighboring pixel information of the current prediction unit in the current picture. The inter picture prediction method for video decoding comprises performing decoding to obtain a motion vector in a current decoding unit; and for fractional pixel motion vector, performing interpolation filtering processing by using reference pixels to which the optimal motion vector directs in a reference picture, and spatially neighboring pixels of the current prediction unit in the current picture. The invention can improve the video coding and decoding efficiency, reduce the bit rate necessary for provision of the same video quality, and also reduce nonzero prediction residual signal so as to facilitate the reduction of blocking artifacts.

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Beijing, China

Jie Jia