Super high resolution video codec system with multiple MPEG-2 HDTV CODEC LSI's

This super high resolution (SHR) video CODEC system is based on a spatial image division and multiple stream output approach and is implemented with multiple MPEG2 HDTV CODEC LSI's. The encoder has two operation modes, a non-multiplexing mode, and a multiplexing mode. In the non-multiplexing, mode, the encoder outputs four constant bit rate transport streams (CBR-TS's) for which it can use two channel-synchronization schemes, system time clock (STC) sharing and sync-marker. In the multiplexing mode, the encoder outputs one CBR-TS comprised of four variable bit rate elementary streams (VBR-ES's), where cooperative operation between the pre-encoder and main-encoder realize adaptive bit allocation between four channels. The encoder also has a video shift and padding function which reduces distortions caused by the image division. These functions enable high-efficiency, high-quality SHR video coding.