Picture information detecting apparatus for a video signal

Details Picture information detecting apparatus for a video signal Picture information detecting apparatus for a video signal

1997-05-07

1998-05-05

Peng, John K.

Television

Image signal processing circuitry specific to television

Noise or undesired signal reduction

348 28, 348556, 348696, H04N 520, H04N 546

Patent

active

057482578

ABSTRACT:
A picture information detecting apparatus includes a picture area signal output circuit to detect a picture area excluding black band portions from the input video signal to produce a picture area signal to designate the picture area from which picture information is detected. Also included is a picture information detecting circuit for detecting picture information from the input video signal in the designated area. A picture quality compensating circuit is also provided for compensating the video input signal using the detected picture information to produce the gradation compensated video signal. An EDTV 2 discriminating circuit may also be included to determine if the video input signal is an EDTV 2 signal.

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patent: 4823184 (1989-04-01), Belmares-Sarabia et al.
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patent: 5354369 (1994-10-01), Izawa et al.
patent: 5355225 (1994-10-01), Bachmann et al.
patent: 5432550 (1995-07-01), Kwon
European Search Report dated 24 May 1995.

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