Invention Grant
- Patent Title: Noise suppression method, noise suppression method program, recording medium recording noise suppression method program, and noise suppression apparatus
- Patent Title (中): 噪声抑制方法,噪声抑制方法程序,记录介质记录噪声抑制方法程序和噪声抑制装置
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Application No.: US11758749Application Date: 2007-06-06
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Publication No.: US08111332B2Publication Date: 2012-02-07
- Inventor: Seiji Kimura , Masami Ogata
- Applicant: Seiji Kimura , Masami Ogata
- Applicant Address: JP Tokyo
- Assignee: Sony Corporation
- Current Assignee: Sony Corporation
- Current Assignee Address: JP Tokyo
- Agency: Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P.
- Priority: JP2006-156803 20060606
- Main IPC: H04N5/00
- IPC: H04N5/00

Abstract:
An apparatus for suppressing noise of a video signal. The apparatus includes: a difference-signal generation section generating a difference signal being a field or frame difference between the input and the output video signals; a noise compensation-signal generation section generating a noise compensation signal; a noise-compensation signal subtraction section; and a feedback-ratio control section, wherein the feedback-ratio control section includes a signal-level determination section determining a signal level of the difference signal for each area and detecting an abrupt change in an input signal, a count section counting the number of input fields or frames from the time of an abrupt change in a signal level to the subsequent abrupt change, and a feedback-ratio setting section setting a feedback ratio for the area in accordance with a count value, wherein the feedback-ratio setting section sets the feedback ratio such that the ratio gradually increases as the count value increases.
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