Picture-display-region discriminating apparatus

Details Picture-display-region discriminating apparatus Picture-display-region discriminating apparatus

1996-06-19

1999-11-23

Peng, John K.

Television

Basic receiver with additional function

Multimode

348556, 348553, H04M 546

Patent

active

059909714

ABSTRACT:
A picture-display-region discriminating apparatus comprising a device for setting a number of picture detection regions on a display screen of a television receiver, a detecting device for detecting a level of a video signal corresponding to each picture detection region by utilizing two reference levels, and a device for determining whether or not a picture exists in each picture detection region based on detection results from the detecting device. One of the reference levels utilized by the detecting device is a black level of a luminance signal of the video signal and the other reference level utilized therewith is a white level of the luminance signal of the video signal.

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Robert L. Hartwig,Basic TV Technology, Second Edition p. 168, Jan. 1, 1995.

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