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Texture plus Depth Video Coding Using Camera Global Motion Information

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Fei CHENG, Tammam TILLO, Jimin XIAO, Byeungwoo Jeon

Abstract

In video coding, traditional motion estimation methods work well for videos with camera translational motion, but their efficiency drops for other motions, such as rotational and dolly motions. In this paper, a motion-information-based 3D video coding method is proposed for texture plus depth 3D video. The synchronized global motion information of the camera is obtained to assist the encoder improve its rate-distortion performance by projecting the temporal neighboring texture and depth frames into the position of the current frame, using the depth and camera motion information. Then, the projected frames are added into the reference buffer list as virtual reference frames. As these virtual reference frames could be more similar to the current to-be-encoded frame than the conventional reference frames, the required bits to represent the residual will be reduced. %It is worth mentioning that the depth map has to be re-mapped after projection as the depth information might be changed by the camera motion. The experimental results demonstrate that the proposed scheme enhances the coding performance for all camera motion types and for various scene settings and resolutions using H.264 and HEVC standers, respectively. With the computer graphic sequences, for H.264, the average gain of texture and depth coding are up to 2 dB and 1 dB, respectively. For HEVC and HD resolution sequences, the gain of texture coding reaches 0.4 dB. For realistic sequences, up to 0.5 dB gain (H.264) is achieved for the texture video, while up to 0.7 dB gain is achieved for the depth sequences.

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Dataset

Texture plus Depth Video Coding Using Camcorder Global Motion Information Dataset

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