Method and circuit for detecting flicker noise

Details Method and circuit for detecting flicker noise Method and circuit for detecting flicker noise

2004-09-20

2009-02-10

Ye, Lin (Department: 2622)

Television

Camera, system and detail

Combined image signal generator and general image signal...

Reexamination Certificate

active

07489347

ABSTRACT:
A flicker noise detecting method that shortens the time for detecting flicker noise. The method sets two of a plurality of horizontal lines forming a frame as average brightness calculation regions that are separated from each other by the predetermined number of the horizontal lines, calculates an average brightness of the two average brightness calculation regions for each of three frames, multiplies each average brightness by a product sum calculation coefficient, and adds the products to generate a sum and generate a detection signal of flicker noise based on the sum. The product sum calculation coefficient is obtained by plotting one cycle of a sine wave and one cycle of a cosine wave at intervals of π/3.

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