Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1987-04-16
1989-04-25
Chin, Tommy P.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358140, 358160, H04N 514, H04N 544
Patent
active
048252883
ABSTRACT:
A video signal processing method for use in a video signal converter includes the following operations: (a) a vertical filtering operation by calculating, at each point of a current line to be generated, a value resulting from weighting the values assigned to the points in the same horizontal position but appearing in at least two lines adjacent to this current line in the same field, the so-called current field; (b) a selection operation by sorting and choosing an intermediate value among the values thus sorted, the sorting operation being effected on a plurality of values one of which is the value obtained at the end of the vertical filtering operation and the other values of which are those assigned to points of the same position as said point of the current line but belonging at least to the field preceding and the field and subsequent to said current field; (c) a picture reconstitution operation by generating a non-interlaced video signal, the current line of said picture being constituted alternately by the corresponding line of the initial picture when said corresponding line is present and by a line reconstructed in accordance with the preceding filtering and selection operations when said corresponding line is not present.
REFERENCES:
patent: 4611231 (1986-09-01), Kobayashi
Radio Mentor Elektronik, No. 5, 1975, p. 196.
Chin Tommy P.
Gadson Gregory P.
U.S. Philips Corporation
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