Television – Bandwidth reduction system – Data rate reduction
Patent
1995-03-29
1997-12-16
Au, Amelia
Television
Bandwidth reduction system
Data rate reduction
341200, H04N 730
Patent
active
056991185
ABSTRACT:
A quantizer that divides each digital word of a series of sequences by a quantification coefficient which may vary from one sequence to the other. The quantizer includes a delay circuit that receives the words to be divided and delays the words by one sequence; a divider that receives the output of the delay circuit; another circuit that provides, for each sequence, the maximum value of the ratio between each word and a limit value that can be provided by the quantizer; a comparator that receives the maximum value of the ratio and the quantification coefficient; a switch, cooperating with the comparator, that provides to the divider a division coefficient equal either to the quantification coefficient if the quantification coefficient is higher than the maximum value of the ratio, or alternatively the maximum value of the ratio.
REFERENCES:
patent: 4386237 (1983-05-01), Virupaksha et al.
patent: 5016010 (1991-05-01), Sugiyama
patent: 5072295 (1991-12-01), Murakami et al.
patent: 5150208 (1992-09-01), Otaka et al.
patent: 5184229 (1993-02-01), Sainto et al.
patent: 5245427 (1993-09-01), Kunihiro
patent: 5301242 (1994-04-01), Gonzales et al.
patent: 5434623 (1995-07-01), Coleman et al.
IEEE Transactions On Circuits And Systems For Video Technology, vol. 1, No. 4, Dec. 1991, New York US pp. 374-378, C.A. Gonzales et al., "Motion Video Adaptive Quantization in a Transform Domain:".
R. Plompen, "Motion Video Coding For Visual Telephony" 1989, PTT Research Neher Laboratories, NL.
IEEE Transactions On Circuits And Systems For Video Technology vol. 2, No. 2, Jun. 1992, New York US pp. 111-112, P.A. Ruetz et al., "A High-Performance Full-Motion Video Compression Chip Set".
Au Amelia
Morris James H.
SGS-Thomson Microelectronics S.A.
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