A Fast Intra-frame Prediction Method of Depth Map Based on 3d-hevc

Abstract

The invention discloses a depth image rapid intra-frame prediction method based on 3D-HEVC. The method comprises the steps of for each depth coding unit, generating a gray co-occurrence matrix; carrying out judgment to obtain a master reference direction of each depth coding unit according to a co-correlation feature value of the gray co-occurrence matrix, wherein only an angle prediction mode in a range of the master reference direction is added to a rate-distortion candidate list; judging whether a currently processed depth coding unit is a smooth block or not by calculating an angle second-order matrix feature value of the gray co-occurrence matrix; if the currently processed depth coding unit is the smooth block, eliminating a step of adding a depth modeling model to the rate-distortion candidate list; and carrying out rate-distortion calculation on the rate-distortion candidate list and selecting an intra-frame prediction mode. According to the method, the coding complexity can be reduced and the search time consumption can be reduced, thereby facilitating real-time application of the 3D-HEVC.

Description

Technical field [0001] The invention relates to the field of three-dimensional video coding, in particular to a 3D-HEVC-based depth map fast intra-frame prediction method. Background technique [0002] 3D video can bring an immersive visual experience. In order to effectively transmit and store 3D video data, the ISO / IEC MPEG and ITU-T VCEG standardization organizations have established the 3D Video Coding Extension Joint Collaborative Group (JCT-3V), which is based on the 2D video coding standard HEVC. The new 3D video coding standard 3D-HEVC can achieve a higher compression ratio than the previous standard. [0003] 3D-HEVC is based on the multi-view video plus depth (MVD) data format. In the MVD format, captured multiple viewpoint videos and corresponding depth maps are encoded and multiplexed into a 3D video bitstream. After texture video and depth data are decoded, additional intermediate viewpoints can be synthesized for display using depth image based rendering (DIBR). 3...

AI Technical Summary

Problems solved by technology

3D-HEVC greatly improves the compression efficiency by introducing some new technologies such as parallax compensation prediction, inter-viewpoint motion prediction, advanced residual prediction, brightness compensation, view synthesis prediction and view synthesis distortion optimization, but at the same time increases the computational complexity.

The introduction of DMM further increases the computational burden of the 3D-HEVC encoder. Therefore, a fast algorithm for intra-frame prediction of depth maps is urgently needed to ensure the coding performance while reducing the complexity.

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