关键词: 编码误差, 三维视频, 深度图, 帧内编码, 误差扩散, 虚拟合成误差

Abstract:

In order to improve the coding quality of depth maps and the virtual synthesis quality of 3D videos,anintra- frame coding method to restrain the coding error pervasion is proposed.In this method,the depth map is firstlysegmented into a flat region and an edge region according to the features of depth maps.Then,the distortion perva-sion properties in the two regions are analyzed,based on which the blocks or sub- blocks that cause the distortionpervasion are corrected by using a correction value during the rate- distortion optimization of macro blocks.Thus,alarge number of following blocks or sub- blocks influenced by the distortion pervasion may possess a smaller value ofrate- distortion cost function.Experimental results indicate that,as compared with the intra- coding method presentedby JMVC 8.5 and the intra- frame predication method based on segmentation,the proposed coding method improvesthe average peak signal- to- noise ratio of the virtual synthesis view by 0.30 and 0.25 dB,respectively.

Key words: coding error, 3D video, depth nap, intra- frame coding, error pervasion, warping error