CAJ | 학술논문

本文提出了一种简单有效的帧内模式选择方法,通过分析CABAC熵编码中色度分量与量度分量的交织信息,去除耦合,同时在率失真优化过程中部分引入部分码率估计方法,降低模式选择的计算复杂度,提高模式选择速度.大量的实验结果表明,本文提出的方法对全I帧序列能够带来66.4%的时间节省,同时几乎不损失编码图像质量;对IBBP序列能够达到平均10%的时间节省,同时部分序列甚至比JM有更好的R-D曲线.
본문제출료일충간단유효적정내모식선택방법,통과분석CABAC적편마중색도분량여량도분량적교직신식,거제우합,동시재솔실진우화과정중부분인입부분마솔고계방법,강저모식선택적계산복잡도,제고모식선택속도.대량적실험결과표명,본문제출적방법대전I정서렬능구대래66.4%적시간절성,동시궤호불손실편마도상질량;대IBBP서렬능구체도평균10%적시간절성,동시부분서렬심지비JM유경호적R-D곡선.
An easy and efficient intra-frame mode decision method is presented in this paper. We analyze the interlace information of the chroma and luma components in the H.264 bit-stream after the CABAC entropy coding,and decouples the correlations. The partial bit rate estimation technology which is used in the rate-distortion optimization can reduce the computational complexity and speed up the mode decision process. The experimental results show that the proposed method can achieve timesaving by 66.4% for all intra-sequences with almost no loss of picture quality. For the IBBP sequence, an average of 10% timesaving is also gotten with some better R-D curves than that of JM.