基于交错量化的多描述编码  

Multiple Description Coding Based on Stagger Quantization

作　　者：林春雨[1] 赵耀[1] 

机构地区：[1]北京交通大学信息所,北京100044

出　　处：《电子学报》2007年第B12期74-78,共5页Acta Electronica Sinica

基　　金：国家863高技术研究发展计划（No.2007AA012175）;国家自然科学基金（No.60776794）;教育部新世纪优秀人才支持计划和北京交大十五重点基金的联合资助

摘　　要：本文提出了一种没有显式索引分配的交错量化方案．首先利用两个基本的标量量化器量化信号以形成两个边路描述，当单个描述收到时，直接利用反量化恢复；如果两路描述都收到，利用两个边路描述组合形成的量化器进行反量化恢复．编码和解码过程都很简单，并且非常容易扩展到多路描述上．对图像信源进行仿真，实验结果证明这种多描述编码方法优于基于显式索引分配的多描述编码方案．Different from the index assignment in multiple description coding based on scalar quantization, we propose a stagger quantization scheme without explicit index assignment. The scheme makes use of two common quanfizers to form the side description firstly. When only one description is received,it reconstructs the signal with inverse quanfizer; when both of the side descriptions are received, it reconstructs the signal with the combined inverse quantizer. Both the coding and decoding process are very simple and can be generalized to n-channel description easily. We apply the scheme to image signals;the results show that the proposed scheme outperforms the explicit index assignment schemes.

关 键 词：图像编码 多描述编码 交错量化 

分 类 号：TN919.8[电子电信—通信与信息系统]