Video signal processing

Television – Format conversion – Line doublers type

Reexamination Certificate

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C348S700000

Reexamination Certificate

active

06922214

ABSTRACT:
Motion between adjacent fields of an interlaced video signal is analyzed by vertically interpolating the current field to produce a line signal which corresponds in vertical position with lines from the succeeding and preceding fields; and subtracting the signals to provide a field difference. The effect of vertical detail is reduced by comparing two field differences or by subtracting a local or global detail signal from the field difference.

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Patent Abstracts of Japan, Publication No. 58050863, Publication Date Mar. 25, 1983, Applicant Matsushita Electric Inc Co Ltd.

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