Multiple Description Speech Codecs Applying Distributed Subframe Interleaving
Error resilient coding is strongly demanded by voice communication over unreliable packet networks. In this paper, we propose a new multiple description scheme named distributed subframe interleaving, and employ this new scheme to create two novel multiple description codecs based on CELP. With introducing distributed subframe interleaving operated on two adjacent speech packets, parameters of LSP are interleaved into different descriptions while other parameters belong to different subframes are assigned in subframe-distributed principle. Moreover, parameter interpolation is adopted to restore the lost description without introducing any extra delay at the decoder. Experimental results demonstrate that the proposed codecs are able to provide significantly better speech quality than traditional CELP codec and suitable to unreliable packet networks.
multiple description coding distributed subframe interleaving CELP G.729 PESQ
Aisheng Ye Lihong Ma Xiaoxi Luo Hanqing Lu
School of Electronic and Information Engineering,South China Univ.of Tech.,Guangzhou,China,510641 Guangdong Mobile Communication co.ltd.,Foshan Branch,Foshan,China,528000 National Lab of Pattern Recognition Inst.Automation,Chinese Academy of Science,Beijing,China,100080
国际会议
广州
英文
2008-11-19（万方平台首次上网日期，不代表论文的发表时间）