Video/film-mode (3:2 pulldown) detector using patterns of two-fi

Details Video/film-mode (3:2 pulldown) detector using patterns of two-fi Video/film-mode (3:2 pulldown) detector using patterns of two-fi

1992-08-17

1994-05-31

Groody, James J.

Television

Basic receiver with additional function

For display of additional information

348441, 348 97, 348607, 348700, H04N 514

Patent

active

053173988

ABSTRACT:
A film/video detector includes circuitry for generating the differences between corresponding pixel values in successive frames of video signal. These differences are accumulated over respective frame intervals. Accumulated values for respective frames are applied to a signal averager and to a correlation circuit. Average values from the averager are subtracted from correlation values from the correlation circuit, and film mode signal is indicated if the latter differences are greater than a predetermined value.

REFERENCES:
patent: 4703358 (1987-10-01), Flannaghan
patent: 5111511 (1992-05-01), Ishii
patent: 5191427 (1993-03-01), Richards

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