A residual prediction method and device

Abstract

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.

Description

technical field [0001] The present invention relates to the technical field of video encoding and decoding, in particular to a residual prediction method and device. Background technique [0002] In 3D video coding or multi-view video coding, videos with multiple views need to be coded. In order to make full use of the correlation between videos of adjacent views, existing methods not only use the images of the encoded views to predict the images of the views to be encoded, but also use the residual images of the encoded views to predict the residual images of the views to be encoded. [0003] Since inter-view prediction residuals from different views are not highly correlated, inter-view prediction residuals are not used to predict any residuals; on the other hand, temporal domain prediction residuals are used to predict temporal domain prediction residuals and inter-view predictions residual. However, since temporal prediction residuals and inter-view prediction residual...

AI Technical Summary

Problems solved by technology

However, since temporal prediction residuals and inter-view prediction residuals often have different characteristics, using temporal domain prediction residuals to predict inter-view prediction residuals often results in increased residual energy and reduced coding efficiency

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