Abstract: This paper seeks to provide some developments, recent effects and research activities in the field of layered video codiug in high definition TV (HDTV). The status of the packet video is briefly reviewed. Benefits and shortcomings of packetized video are pointed out, too. Some types of layered video coding schemes are identified. The approaches in which the layering is performed using subband coding, as well as discrete cosine transform coding with HDTV pictures are demonstrated. Finally, some research directions are recommended.
Keywords: High definition television, video coding, ATM network, ISDN, BISDN, packet video, DCT coding, subband coding, layred coding.