Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Patent
1997-05-30
2000-07-11
Lee, Richard
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
348405, 348416, 348420, H04N 712
Patent
active
060883928
ABSTRACT:
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 system uses a prequantization process to reduce the computational load imposed by the quantizer optimization calculations required for feed-forward semantic coding bit-rate control. The H.263 CBPY and MCBPC coding tables are reordered so as to be indexed using an orthogonal flag-based index values and the RLA coding table is block-indexed using clipped amplitude values, for faster access into these tables. The system also uses a rate-assist process to assure that DQUANT values are provided in each edge macroblock that follows a transition to and from each semantically-defined region when the edge macroblocks have four motion vectors by reducing the number of motion vectors in the macroblock to one.
REFERENCES:
patent: 5231484 (1993-07-01), Gonzales
patent: 5426463 (1995-06-01), Reininger
patent: 5602594 (1997-02-01), Cho
patent: 5638125 (1997-06-01), Jeong
patent: 5745178 (1998-04-01), Hartung
patent: 5790745 (1998-08-01), Sugiyama
patent: 5870145 (1999-02-01), Yada
Lee Richard
Lucent Technologies - Inc.
LandOfFree
Bit rate coder for differential quantization does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Bit rate coder for differential quantization, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bit rate coder for differential quantization will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-549577