全数字化HDTV传输系统图像信源编码的研究  

A Research on Video Source Coding Scheme for All-Digital HDTV Transmission System

作　　者：张锁平[1] 张春田[2] 

机构地区：[1]天津大学,天津300072 [2]天津大学电子工程系,教授天津300072

出　　处：《通信学报》1993年第2期18-26,共9页Journal on Communications

基　　金：国家自然科学基金

摘　　要：本文研究了一种全数字化HDTV传输系统图像信源编码方案。将运动补偿帧间预测,离散余弦变换编码和二维熵编码技术结合起来,通过对码率的自适应调节,实现HDTV图像信号的压缩编玛。在14.38Mb/s和20Mb/s码率,取得了良好的图像质量。应用数字调制技术,如16-QAM,能够实现在一个基带8MHz射频信道中传输全数字化HDTV。A video source coding scheme for all-digital HDTV transmission system is described in this paper, which is based on motion-compensated interframe prediction, DCT and two-dimensional entropy coding, applying adaptive rate control, implementing bit-rate reduction of HDTV video signals. Simulation experiments show that good decoded image quality can be acheived at bit-rate of 14.38 Mb/s and 20 Mb/s. By means of digital modulation technique such as 16-QAM, it is possible to transmit all-digital HDTV signals in a radio-frequency channel with base-band of 8 MHz.

关 键 词：高清晰度电视 图像编码 传输系统 

分 类 号：TN949.17[电子电信—信号与信息处理]