CAJ | 학술논문

提出一种分布式小波视频编码自适应嵌套量化模理,对Wyner-Ziv帧做小波变换,利用Slepian-Wolf编码器对低频子带系数进行量化,采用SPIHT编码器对高频子带系数进行编码,通过分析Wyner-Ziv帧低频子带系数与参考帧低频子带系数的残差自适应度,判定Wyner-Ziv帧低频子带系数的最化步长,从而使运动剧烈的视频序列有较大的量化步长,而运动平缓序列的量化步长较小.实验结果表明,采用该模型能获得较好的编码效果.
제출일충분포식소파시빈편마자괄응감투양화모리,대Wyner-Ziv정주소파변환,이용Slepian-Wolf편마기대저빈자대계수진행양화,채용SPIHT편마기대고빈자대계수진행편마,통과분석Wyner-Ziv정저빈자대계수여삼고정저빈자대계수적잔차자괄응도,판정Wyner-Ziv정저빈자대계수적최화보장,종이사운동극렬적시빈서렬유교대적양화보장,이운동평완서렬적양화보장교소.실험결과표명,채용해모형능획득교호적편마효과.
An adaptive nested scalar quantization model for distributed wavelet video coding is proposed, which conducts wavelet transformation to Wyner-Ziv frame, and uses Slepian-Wolf coder to quantificate the low frequency subband coefficient while using SPIHT coder to program high frequency ones. By analyzing the error adaptive degree between low frequency subband coefficient and reference frame ones of Wyner-Ziv frame, the quantization step length of it is determined, which makes active video sequence have bigger step lenth, and the placid one have less step length, Experimental results show this model can obtain better coding effect.