Television – Image signal processing circuitry specific to television – Noise or undesired signal reduction
Patent
1997-09-30
2000-05-09
Lee, Michael H.
Television
Image signal processing circuitry specific to television
Noise or undesired signal reduction
348620, 348700, H04N 521
Patent
active
060611006
ABSTRACT:
A method of reducing noise in video signal, by processing the pixels of a process frame of video signal in conjunction with a selected number of previously processed frames to determine values for target pixels in the process frame by applying a temporal motion detector to determine whether a target pixel has a still or motion status and further processing the pixels with motion status by impulse recognition step to further determine whether the pixel should be classified as having a still or a motion status. The pixels are then checked via a spatial motion detecting step to obtain a motion index value to the pixels and the motion index value is used in a motion adaptive temporal filter to define the pixel value of the still pixel. The motion index value of the pixels is used to set a dynamic threshold in a detailed motion active spatial filter to define the pixel value for the motion pixels. The system may be integrated with a converter box for converting digital signals to analog for use in conjunction with analog television sets services by digital signals.
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patent: 5638139 (1997-06-01), Clatanoff et al.
Du Julong
Li Xiaoli
Shi Pingnan
Ward Rabab K.
Lee Michael H.
Rowley C. A.
The University of British Columbia
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