适合网络传输的鲁棒小波低比特率视频编码  

ROBUST LOW BIT-RATE WAVELET VIDEO CODING FOR PACKET NETWORK

作　　者：范绍兴[1] 叶澄清[1] 

机构地区：[1]浙江大学计算机科学与工程系,杭州310027

出　　处：《计算机研究与发展》2001年第7期876-881,共6页Journal of Computer Research and Development

摘　　要：提出了一种适合包交换网络传输的基于离散小波变换的视频编码方案 ,通过对 SPIHT小波系数编码算法进行复杂度降低、纹理分割等修改 ,来适应视频编码在编码效率和鲁棒性方面的要求 .为解决网络数据包丢失造成的帧质量骤降 ,方案对数据包的重要性进行了均衡 ,每一个数据包中均包含帧内信息和帧间信息 ,利用改进的SPIHT算法生成混合比特流 .试验表明 ,该方案运算复杂度低 ,对网络传输中的包丢失不敏感 。A video coding scheme based on discrete wavelet transform (DWT) is presented, which is suitable to packet switch network. By decreasing complexity and texture division, modification is applied to the SPIHT wavelet coefficient coding algorithm to meet the efficient and robust requirement of the video coding scheme. To solve the problem of sharp decreasing of frame quality due to packet lost, the significance of packets is equalized by including Intra and Inter frame information in every packet. The improved SPIHT algorithm is used to produce the mixed bit stream. Experiments indicate that the scheme has the advantages of low computation complexity, not being sensitive to packet lost, and error diffusion restraint.

关 键 词：视频编码 离散小波变换 图像序列 Internet 网络传输 

分 类 号：TN919.81[电子电信—通信与信息系统]