Motion detection circuit and a noise suppressing circuit including the same
In a motion detection circuit, a difference signal between the video and one-frame delayed video signals is generated. An Edge signal is generated from the video and delayed video signals. Motion in a target pixel is judged from the interframe difference signal according to the edge signal. A motion judging circuit further includes an LPF and a selector for supplying an output of the LPF or the difference signal. The motion judging circuit may further includes: a peripheral pixel comparing circuit (may be bypassed) for detecting motion at the pixel by checking polarities of the difference signal at an area around the target pixel; a majority detection circuit (may be bypassed) for detecting a majority of the results of the polarity deviation detection circuit to judge the motion with deviation to a side of stopping; and a polarity deviation detecting circuit for judging the motion as moving in the presence of agreement of the polarities of all pixels at any of peripheral areas around the target pixel. The size of the peripheral areas are controlled. The polarity deviation circuit may compensate the result of the majority detection circuit. Width of the edge signal is controlled. A noise suppression apparatus including a motion detection circuit mentioned above is also disclosed.
Matsushita Electric Industrial Co., Ltd.
G
G06T
inventional
Misa Noriyoshi Yukio
Kasahara Kato Fujita