摘要： 为降低新一代高效视频编码标准H.266/VVC的编码复杂度，提出一种快速的帧内预测模式判决方法。从率失真理论的角度出发，分析变换域残差的分布特性，根据标量量化技术对码率的影响推导出编码码率预测模型。结合帧内预测原理，利用当前块预测残差、参考块预测残差及其编码失真提出编码失真预测模型，并根据率失真代价确定最优的帧内预测模式。实验结果表明，该判决方法在保证编码效率的同时约节省了31%的编码时间。

关键词: 模式判决, 帧内编码, 率失真优化, 通用视频编码, 帧内预测

Abstract: In order to reduce the coding complexity of the new generation of high-efficiency video coding standard H.266/VVC, a fast prediction mode decision method is proposed for intra coding.The distribution characteristic of transform residuals is first analyzed according to the rate-distortion theory.The coded bit-rate prediction model that considers the influence of scalar quantization is derived.Then combing the principle of intra prediction, the coded distortion prediction model is constructed by using the current residuals, the reference residuals and the reference distortion.Finally the optimal intra-prediction mode is determined based on the rate-distortion cost.Experimental results show that the proposed method could save 31% coding time on average while keeping a good coding efficiency.

Key words: mode decision, intra coding, Rate Distortion Optimization(RDO), versatile video coding, intra prediction

中图分类号: 

• TN911.7