Television – Bandwidth reduction system – Data rate reduction
Patent
1993-04-01
1995-05-30
Groody, James J.
Television
Bandwidth reduction system
Data rate reduction
348700, H04N 712
Patent
active
054206383
ABSTRACT:
A coding subassembly for images composed of at least one moving pattern against a fixed or quasi-fixed background, including circuits for constructing a base model representative of the useful zone of the said images, a coding circuit, and an associated decoding subassembly. The model constructing circuits include circuits for initial calibration and adaptation of the model and a circuit for determining the movement of characteristic points taken from the useful zone and a circuit for selecting at least one zone of particular interest inside the useful zone and determining its movement. The coding circuit includes a circuit for coding output signals from the initial calibration circuit, and a circuit for correcting any shifts in luminance or chrominance in zones alongside the borders of the said zone(s) of interest observed on either side of these borders.
REFERENCES:
patent: 4717956 (1988-01-01), Moorhead et al.
patent: 4717957 (1988-01-01), Santamaki et al.
patent: 4841575 (1989-06-01), Welsh et al.
patent: 4996594 (1991-02-01), Murayama
patent: 5086480 (1992-02-01), Sexton
patent: 5103488 (1992-04-01), Gemello et al.
K. Aizawa et al., "Model-Based Analysis Image Coding (MBASIC) System For A Person's Face", Signal Processing: Image Communication, vol. 1, No. 2, Oct. 1989, pp. 139-152.
Bouchard Lionel
Riglet Philippe
Sirat Jacques-Ariel
Grant Chris
Groody James J.
Marion Michael E.
U.S. Philips Corporation
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