首页> 外文会议>Visual Communications and Image Processing 2005 pt.2 >Adaptive Intra Mode Skipping Algorithm for Inter Frame Coding of H.264/AVC
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Adaptive Intra Mode Skipping Algorithm for Inter Frame Coding of H.264/AVC

机译:H.264 / AVC帧间编码的自适应帧内跳过算法

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Compared to contemporary video coding standards, the H.264 standard achieves higher compression efficiency at the expense of high computational complexity at the encoder to cany out rate distortion optimization (RDO). In this paper, we investigated the encoding speed improvement technology of H.264 and focus on RDO to select the encode mode for fast coding of H.264. Based on the analysis of motion activity information of the macroblock to be coded in inter frame, we proposed a methodology to simplify the computation of encoder while maintaining the coding efficiency. At first, we established the relationships between INTRA mode and motion activity in inter frame. Then the INTRA mode skipping algorithm (IMSA) is proposed and applied to RDO procedure. If the motion activity of a macroblock is small enough, then IMSA adaptively skips the whole INTRA mode decision process because the encoder benefits little from such type of macroblocks. Simulation results demonstrate its valuable efficiency of considerably reducing 30%~60% encoding complexity while incurring little even no loss in quality and increase in bit rate. Additionally, it is easier than other published fast mode decision algorithms and more efficient when working together with them.
机译:与当代视频编码标准相比,H.264标准以编码器的高计算复杂度为代价实现了更高的压缩效率,从而无法进行速率失真优化(RDO)。在本文中,我们研究了H.264的编码速度改进技术,并重点研究了RDO来选择H.264的快速编码方式。在对帧间编码宏块的运动活动信息进行分析的基础上,提出了一种在保持编码效率的同时简化编码器计算的方法。首先,我们在帧间建立了INTRA模式和运动活动之间的关系。然后提出了INTRA模式跳过算法(IMSA)并将其应用于RDO过程。如果宏块的运动活动足够小,则IMSA会自适应地跳过整个INTRA模式决策过程,因为编码器不会从此类宏块中受益。仿真结果表明,该算法可有效降低编码复杂度达30%〜60%,同时几乎不损失质量和增加比特率,具有很高的实用价值。此外,它比其他已发布的快速模式决策算法更容易,并且与它们一起工作时效率更高。

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