电子学报
電子學報
전자학보
ACTA ELECTRONICA SINICA
2014年
10期
1938-1943
,共6页
分布式视频编码%无反馈%码率分配%相关噪声模型
分佈式視頻編碼%無反饋%碼率分配%相關譟聲模型
분포식시빈편마%무반궤%마솔분배%상관조성모형
distributed video coding%feedback-free%rate allocation%correlation noise model
码率分配是无反馈分布式视频编码中的关键技术之一．本文研究编码端快速边信息生成方法，基于边信息和Wyner-Ziv帧各个位平面误码率，提出了一种编码端码率分配算法（Bitplane Error Probability based Encoder Rate Control ，BEP－ERC ）．还提出在编码端精确估计拉普拉斯—柯西混合分布（Laplace-Cauchy Mixture Distribution ，LCMD ）模型参数α和μ的思想．实验表明本文算法与现有算法相比，率失真性能提升0.1～0.4dB ，且降低了编码端计算复杂度．
碼率分配是無反饋分佈式視頻編碼中的關鍵技術之一．本文研究編碼耑快速邊信息生成方法，基于邊信息和Wyner-Ziv幀各箇位平麵誤碼率，提齣瞭一種編碼耑碼率分配算法（Bitplane Error Probability based Encoder Rate Control ，BEP－ERC ）．還提齣在編碼耑精確估計拉普拉斯—柯西混閤分佈（Laplace-Cauchy Mixture Distribution ，LCMD ）模型參數α和μ的思想．實驗錶明本文算法與現有算法相比，率失真性能提升0.1～0.4dB ，且降低瞭編碼耑計算複雜度．
마솔분배시무반궤분포식시빈편마중적관건기술지일．본문연구편마단쾌속변신식생성방법，기우변신식화Wyner-Ziv정각개위평면오마솔，제출료일충편마단마솔분배산법（Bitplane Error Probability based Encoder Rate Control ，BEP－ERC ）．환제출재편마단정학고계랍보랍사—가서혼합분포（Laplace-Cauchy Mixture Distribution ，LCMD ）모형삼수α화μ적사상．실험표명본문산법여현유산법상비，솔실진성능제승0.1～0.4dB ，차강저료편마단계산복잡도．
Rate control is one of the key technologies in feedback-free distributed video coding(DVC) systems .This paper studies the fast method to generate side information at encoder ,based on the error probability of each bitplane between side informa-tion and Wyner-Ziv (WZ ) information ,a bitplane error probability based encoder rate control (BEP-ERC ) algorithm is proposed . Also the idea of calculating the Laplace-Cauchy mixture distribution (LCMD ) model parameter αand μat encoder is proposed . Experimental results show that the proposed BEP-ERC method has a higher rate-distortion (RD ) performance than other existing feedback-free algorithms ,with the increament gap of 0.1~0.4dB .In addition ,its computation complexity is lower .
