Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1991-06-07
1993-06-15
Kostak, Victor R.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358138, 382 56, 36472401, H04N 712
Patent
active
052204227
ABSTRACT:
A 3.times.3 sub-band coding-decoding circuit for coding and decoding video signals and a method thereof includes: a horizontal dividing section, a vertical dividing section, a vertical synthesizing section, and a horizontal synthesizing section. The transmitting signals are divided into a horizontally compressed low band, a horizontally compressed medium band and a horizontally compressed high band. From these three bands, first to sixth bands (LL-HL) are formed. At the receiving section, the six bands are restored into three bands, i.e., a vertically restored low band, a vertically restored medium band and a vertically restored high band. Then the three restored bands are finally restored to the form before the coding by expanding the horizontal components and by adding them together.
REFERENCES:
patent: 4817182 (1989-03-01), Adelson et al.
patent: 4829378 (1989-05-01), LeGall
patent: 4918524 (1990-04-01), Ansari et al.
patent: 4987480 (1991-01-01), Lippman et al.
patent: 5010405 (1991-04-01), Schreiber et al.
patent: 5048111 (1991-09-01), Jones et al.
Bushnell Robert E.
Kostak Victor R.
Lee Michael M.
Samsung Electronics Co,. Ltd.
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