【摘要】 主要研究了AVS标准的编码部分,详细介绍了帧内预测过程。帧内预测是整个编码系统中较为耗时的模块,对其进行优化可以提高编码效率。根据AVS的分块特点,利用子块与子块之间的相关性和存在平滑块的特征,提出了一种新颖的基于自适应门限的AVS帧内预测模式快速选择优化算法,以减少冗余的搜索方向。实验结果表明,在比特率略微上升,信噪比几乎不改变的情况下,该算法能有效的缩短编码时间,减少计算复杂度。更多还原

【Abstract】 Encoding part of AVS(audio video coding standard) is mainly studied and intraprediction process is given in detail.Intra-prediction is a time-assuming module in AVS encoding system,optimize it can increase the encoding efficiency.According to the character smoothness and correlation of neighbor sub-blocks,a optimized new fast intra-prediction mode selection algorithm is put forward based on self-adapting threshold for short the redundant search directions.The experimental results show that the new algorithm can short the encoding time and decrease the complexity of calculating but only increasing a little code rate,and the SNR is almost unchanged.更多还原