A Realization Of MC/DCT By Video Signal Processors
Yasuhiro Kosugi, Kiyoshi Sakai, Takahiro Hosokawa, Kiichi Matsuda · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1988
One type of video signal processors is introduced in this paper, for which multi-processor configuration and required operations are studied. The hybrid coding scheme of MC/DCT is noted as an algorithm of high efficiency for low bit rate coding. But it has a problem that the decoded pictures of receiver are spoilt if the calculation types of inverse-DCT are not identical in transmitter and receiver. So two approaches of DC coefficient separation and conversion of the transfer range on the block by block basis are taken to solve this IDCT mismatch problem by improving the precision of IDCT calculation. To decide the transfer range, three methods are studied. The computer simulation is done to prove the performance of these methods, and the application of the processor is also studied to each method.