Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1989-02-14
1990-06-12
Britton, Howard W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358105, 375122, H04N 7133, H04N 7137
Patent
active
049337637
ABSTRACT:
Method of coding images converted into digital video signals in accordance with a format having three-dimensional blocks of the signals, wherein the method includes the following preliminary steps:
(a) estimation of a principal movement from image to image for associating a displacement vector with each image, with respect to the preceding image, said principal vector being the vector for which the image-to-image difference is minimum, and;
(b) scan conversion with a view to defining the format of the three-dimensional blocks by dividing the sequence of video signals corresponding to images into groups each corresponding to N consecutive images and by defining within each of these groups the three-dimensional blocks based on M lines, and P pixels per line on the one hand, in the image plane and, on the other hand, N successive planes corresponding to n images of the group, the N two-dimensional blocks of M lines by P pixels which compose each three-dimensional block of one and the same group being spatially shifted from one image to the next by the said displacement vector estimated for each image.
REFERENCES:
patent: 4394774 (1983-07-01), Widergren
patent: 4691329 (1987-09-01), Juri et al.
patent: 4704628 (1987-11-01), Chen et al.
patent: 4800425 (1989-01-01), Schwerzel
patent: 4802005 (1989-01-01), Kondo
Britton Howard W.
Goodman Edward W.
U.S. Philips Corporation
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