Bit rate coder for differential quantization

摘要: A feed-forward bit-rate control system that selects and formats DQUANT values in real time for optimal semantically-encoded image transmission by video-compression codecs complying with the ITU-T standards H.263 or H.263E. The uses a prequantization process to reduce computational load imposed quantizer optimization calculations required semantic coding control. CBPY MCBPC tables are reordered so as be indexed using an orthogonal flag-based index RLA table is block-indexed clipped amplitude values, faster access into these tables. also rate-assist assure provided each edge macroblock follows transition from semantically-defined region when macroblocks have four motion vectors reducing number of one.