Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1988-06-15
1989-10-17
Britton, Howard W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 36, 358135, 358167, 375 34, H04N 7137
Patent
active
048750956
ABSTRACT:
A noise-shaping predictive coding system is disclosed, in which the deviation (i.e. correlation) of quantization representative values, which occurs when the coding noise resulting from predictive coding is frequency-shaped by a noise shaping filter, is used to perform an coding operation, so that the quantization entropy can be reduced simultaneously. According to another aspect of the present invention, the human visual characteristic may be combined with the deivation of quantization representative values.
REFERENCES:
patent: 3940555 (1976-02-01), Amano
patent: 4334237 (1982-06-01), Reitmeier
patent: 4731664 (1988-03-01), Nishiwaki
Matsumoto Shuichi
Murakami Hitomi
Britton Howard W.
Burns Robert E.
Kokusai Denshin Denwa Kabushiki Kaisha
Lobato Emmanuel J.
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