摘要
针对H.264/AVC可分级编码扩充标准(SVC),本文提出了一种联合信源/信道编码(JSCC)的视频传输方法.该方法采用一种新型的缩减栅格算法与拉格朗日优化技术对SVC数据与差错控制保护级别进行最优分配.本文提出的缩减栅格算法采用疏散式栅格结构,实行依层计算与缩减队列的策略,计算效率比同类高效算法提高了约20~50倍.大量仿真数据表明,采用本文高效算法的JSCC方法在各种信道条件下达到同类方法相同的优化性能.
In this paper,a joint source/channel coding(JSCC) video transmission approach is proposed for the scalable extension of H.264/AVC coding(SVC) standard.The JSCC approach employs a novel reduced trellis algorithm and Lagrangian optimization technique to derive appropriate parts of the SVC stream and protection levels of error-control codes.The proposed algorithm uses a discrete trellis structure.With the layer-based computation method and a simplified structure,it improves computation efficiency by about 20-50 times over the state-of-the-art algorithm.Extensive simulation results show that the proposed JSCC scheme with the efficient algorithm provides same optimized performance with other algorithms under various channel conditions.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2011年第4期859-864,共6页
Acta Electronica Sinica