面向未来的语义通信:基本原理与实现方法  

Semantic communications for future:basic principle and implementation methodology

作　　者：张平[1] 牛凯 姚圣时 戴金晟 ZHANG Ping;NIU Kai;YAO Shengshi;DAI Jincheng(The State Key Laboratory of Networking and Switching Technology,Beijing University of Posts and Telecommunications,Beijing 100876,China;The Key Laboratory of Universal Wireless Communications,Ministry of Education,Beijing University of Posts and Telecommunications,Beijing 100876,China)

机构地区：[1]北京邮电大学网络与交换技术国家重点实验室,北京100876 [2]北京邮电大学泛网无线通信教育部重点实验室,北京100876

出　　处：《通信学报》2023年第5期1-14,共14页Journal on Communications

基　　金：国家自然科学基金资助项目(No.62293481,No.92067202,No.62071058)。

摘　　要：阐述了语义通信的基本原理与实现方法。首先,提出了语义通信的系统模型,梳理语义通信的基本概念与术语,对比经典通信与语义通信的主要区别,总结了语义通信的技术优势。在此基础上,回顾了语义信息论的发展,构建了语义信息的度量指标体系,提出了基于归一化条件复杂度的新型度量,用于评估语义压缩的极限,探讨了语义典型序列编码的性质,揭示语义编码的渐近性能。进一步地,归纳了语义编码传输的2种典型方法——直接编码与变换编码,分析了它们的基本原理,并针对文本、语音与图像信源展示了语义编码传输的优越性能。最后,总结了语义通信的研究难点与问题,指出未来的研究方向。The basic principle of semantic communications and the associated implementation methodology were introduced.First,the systematic model of semantic communications was proposed and basic concepts and terminology were deduced by comparing the fundamental differences between classic communications and semantic communications.Thus,the technological advantages of semantic communications were concluded.Then,the development of semantic information theory was retrospected and the measurement system of semantic information was established.Furthermore,the normalized conditional complexity(NCC)was proposed to evaluate the limit of semantic compression and the property of semantic typical sequence coding was discussed so as to reveal the corresponding asymptotic performance.In addition,the semantic coding transmission methods were classified into two typical schemes,that is,direct coding and transform coding,and the basic principles of these schemes were presented.For the text,speech,and image sources,the superior performance of the semantic coding techniques were demonstrated.Finally,the difficulty and open issues of the semantic communications were further concluded and further research directions were pointed out.

关 键 词：语义通信 语义信息论 归一化条件复杂度 语义编码传输 非线性变换编码 

分 类 号：TN911.22[电子电信—通信与信息系统]