Development of ASIC Based H1 Rate Video Codec.
T. Kobayashi, Kazuyoshi Shomura, Ryuji SAITO, Hiroshi Fujiwara, Takashi Shiina, Naruyoshi Ogata, Shinichi Hamanaka · The Journal of The Institute of Image Information and Television Engineers · 1993
We have implemented an Hl-rate video codec whose video quality is close to that of normal 30-frames/sec television Until now, preprocessing has been implemented with ASICs that can manage video rates of 30 frames/sec, and actual coding has been implemented with DSPs that have a processing limit of only 15 frames/sec From viewpoints of performance, cost, and flexibility, programmable ASICs are the best choice for implementing the Hl-rate video codecs.For compact implementation, we developed our own ASIC for the audio codec, adopted a high performance H 221 multiplexer-demultiplexer, and organized the codec system and picture quality controls under a single microprocessor We also implemented various kinds of communication interfaces, and confirmed performance and functions by evaluating image quality and testing conformance with different vendors'codecs.1.