Method and device for film-mode detection

Details Method and device for film-mode detection Method and device for film-mode detection

1994-03-14

1995-04-11

Kostak, Victor R.

Television

Format conversion

Line doublers type

348448, 348558, H04N 701

Patent

active

054063337

ABSTRACT:
A method for determining which of pairs of successive video fields have interlace scan characteristics includes generating accumulated differences FD of pixels in successive lines of respective fields of successive pairs of fields and generating accumulated differences FR of pixels in successive lines of interlaced said pairs of fields. The accumulated differences FD and FR are compared and pairs of said fields are classified as interlaced if the ratio of accumulated differences FR/FD is greater than a predetermined threshold value.

REFERENCES:
patent: 4641188 (1987-02-01), Dischert
patent: 4703358 (1987-10-01), Flannaghan
patent: 4837626 (1989-06-01), Nishiyama et al.
patent: 4982280 (1991-01-01), Lyon et al.
patent: 5111511 (1992-05-01), Ishii et al.
patent: 5187575 (1993-02-01), Lim
patent: 5191427 (1993-03-01), Richards et al.

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