Television – Camera – system and detail – Combined image signal generator and general image signal...
Reexamination Certificate
2005-05-31
2005-05-31
Moe, Aung (Department: 2612)
Television
Camera, system and detail
Combined image signal generator and general image signal...
C348S447000, C348S910000
Reexamination Certificate
active
06900834
ABSTRACT:
Lighting flicker in the output of a video imaging device is detected. The video imaging device has a main picture area divided into pixels for producing successive images at a frame rate. A series of signals are produced from at least one additional picture area adjacent the main picture area, with the additional picture area having a size substantially larger than a pixel. Each of the signals is a function of light incident on the additional picture area in a time period substantially shorter than that of the frame rate. A predetermined number of the signals are accumulated to form a series of compound samples, and the compound samples are filtered to detect components indicating the lighting flicker. The filtering is performed using a bandpass filter tuned to the nominal flicker frequency. The compound samples are formed at a sample rate which is a multiple of the nominal flicker frequency, and the filtering is performed by taking the fundamental output component of a radix-N butterfly.
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Henderson Robert
Hurwitz Jonathan Ephriam David
Murray Andrew
Smith Stewart Gresty
Allen Dyer Doppelt Milbrath & Gilchrist, P.A.
Jorgenson Lisa K.
Moe Aung
STMicroelectronics Limited
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