An-Yang, Korea.pdf

P R O O F C O P Y 0 0 1 1 0 1 J E I MPEG-compliant joint source?channel coding using discrete cosine transform and substream scheduling for visual communication over packet networks Seong-Whan Kim IMT-2000 SW-1 Lab. of Cellular Division LGIC Inc. An-Yang, Korea E-mail: ksh@lgic.co.kr Shan Suthaharan Tennesse State University Department of Computer Science Nashville, Tennessee Heung-Kyu Lee Korea Advanced Institute of Science and Technology Department of Computer Science 373-1 Kusong-Dong Yusong-Ku Taejon 305-701, Korea K. R. Rao University of Texas at Arlington Department of Electrical Engineering Arlington, Texas Abstract. Quality of Service (QoS)-guarantee in real-time commu- nication for multimedia applications is significantly important. An ar- chitectural framework for multimedia networks based on substreams or flows is effectively exploited for combining source and channel coding for multimedia data. But the existing frame by frame ap- proach which includes Moving Pictures Expert Group (MPEG) can- not be neglected because it is a standard. In this paper, first, we designed an MPEG transcoder which converts an MPEG coded stream into variable rate packet sequences to be used for our joint source/channel coding (JSCC) scheme. Second, we designed a classification scheme to partition the packet stream into multiple substreams which have their own QoS requirements. Finally, we designed a management (reservation and scheduling) scheme for substreams to support better perceptual video quality such as the bound of end-to-end jitter. We have shown that our JSCC scheme is better than two other two popular techniques by simulation and real video experiments on the TCP/IP environment. ? 2001 SPIE and IST. [S1017-9909(11)00101-2] 1 Introduction Quality of Service ~QoS! guarantee in real time communi- cation for multimedia applications is significantly impor- tant, because more multimedia services, such as video on demand, video conference, and live video and audio bro