CAJ | 학술논문

多视点彩色加深度视频(MVD)是目前3D场景的主流表示方式之一。在3D-HEVC的编码框架中，深度视频帧内编码具有较高的编码复杂度。本文提出了一种基于区域分割的3D-HEVC 深度视频快速帧内编码算法。首先根据对应彩色视频的纹理特征和深度视频的边界提取结果，把深度图分为四个区域；然后统计分析了各区域中深度视频编码失真对绘制中间视点质量的影响以及帧内编码预测模式的分布规律；最后设计了在不同区域里采用不同的CU尺寸提前决定、模式粗选限定和快速DMMs模式决定的算法。实验结果表明，本文提出的算法在绘制的中间视点质量不变的情况下平均节省55.11%的总体编码时间，对于深度视频的编码时间平均节省61.57%。
다시점채색가심도시빈(MVD)시목전3D장경적주류표시방식지일。재3D-HEVC적편마광가중，심도시빈정내편마구유교고적편마복잡도。본문제출료일충기우구역분할적3D-HEVC 심도시빈쾌속정내편마산법。수선근거대응채색시빈적문리특정화심도시빈적변계제취결과，파심도도분위사개구역；연후통계분석료각구역중심도시빈편마실진대회제중간시점질량적영향이급정내편마예측모식적분포규률；최후설계료재불동구역리채용불동적CU척촌제전결정、모식조선한정화쾌속DMMs모식결정적산법。실험결과표명，본문제출적산법재회제적중간시점질량불변적정황하평균절성55.11%적총체편마시간，대우심도시빈적편마시간평균절성61.57%。
Multi-view video plus depth (MVD) is one of the main representations of 3D scene. Under the framework 3D-HEVC, the depth video intra coding has high computational complexity. A region segmentation-based fast CU size decision and mode decision algorithm for 3D-HEVC depth video intra coding is proposed. Firstly, the depth map is divided into four regions based on the edge extraction of depth video and texture detection of the corresponding color video texture. Then, the effects of depth video distortion on rendered view quality and mode distribution of intra prediction coding are statistically analyzed in each region. Finally, different CU size, rough prediction mode and DMMs decision are designed for encoding different regions. Experimental results show that the proposed algorithm save the encoding time of MVD by 55.1% on average, and the encoding time of depth video by 61.57% on average with negligible rendered virtual view image degradation.