图象编码系统中解码的唯一性和即时性探讨

The uniquely decodable code and instantaneous code in image coding system

一个图象编码系统由编码器、信道、解码器三个部分组成.通过编码,降低了数字图象对存储量的要求,缩短了图象传输所需的时间,但这是以牺牲压缩与解压的时间为代价的.解码的唯一性和即时性在图象处理过程中不容忽视.本文给出了解码的唯一性和即时性的概念,举例讨论了解码过程中遇到的唯一性和即时性问题以及它们对解码结果的影响.

A image coding system consists of three parts:encodor,decodor.It lowers saving demands of the digital image and shortens the time of image conveying.But the cost is the time of compression and decodor.We cannot neglect the uniqueness and instant of decoding.This paper gives us the concepts of uniquely decodable code and instantaneous code,and then discusses the unique and instantaneous problems we meet in the course of decoding and the influence on the result of decoding.