Method and device for film-mode detection

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

1993-04-23

1994-11-15

Powell, Mark R.

Television

Format conversion

Line doublers type

348449, 348700, H04N 718

Patent

active

053652738

ABSTRACT:
A film mode detection method and corresponding relatively non complex hardware implementation compares the amplitudes of pixels of corresponding image areas of three successive field to determine if the pixel amplitudes are monotonically increasing or decreasing. Depending on the comparison a positive or negative polarity indication is generated and these indications are combined within each field to generate a polarity indication representing each respective field. The field sequence of such field polarity indications are thereafter compared with a predetermined pattern to determine whether the video signal is from a film or video-mode source.

REFERENCES:
patent: 4127869 (1978-11-01), Millward
patent: 4924306 (1990-05-01), Van der Meer et al.
patent: 4941045 (1990-07-01), Birch
patent: 4982280 (1991-01-01), Lyon et al.
patent: 5023713 (1991-06-01), Nishigori
patent: 5153719 (1992-10-01), Ibenthal

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