ABSTRACT
This chapter introduces several important application issues of Moving Picture Experts Group (MPEG)-1/2 video, which include the Advanced Television Standard Committee (ATSC) digital television (DTV) standard that has been adopted by the Federal Communications Commission as the TV standard in the United States, transcoding, down-conversion decoder, and error concealment. The DTV standard is the application extension of MPEG video standard. The use of MPEG-2 video compression fundamentally enables ATSC DTV devices to interoperate with MPEG-1/2 computer multimedia applications directly at the compressed bitstream level. The ATSC DTV system uses a trellis-coded 8-level vestigial sideband modulation technique to deliver approximately 19.3 Mbps in the 6 MHz terrestrial simulcast channel. The system of DTV standard includes four layers: picture layer, compression layer, transport layer, and transmission layer. The function of compression layer is to compress the raw data from about 1 Gbps to the data rate of approximately 19 Mbps to satisfy the 6 MHz spectrum requirement.
