Video equalizing circuits

专利名称：Video equalizing circuits

发明人：Matsuzawa, Hiroshi, Patents Div.,Sato,

Ichitaro, Patents Div.,Urata, Kaoru, PatentsDiv.

申请号：EP91307447.2申请日：19910813公开号：EP0471551A3公开日：19930113

专利附图：

摘要：An equalization circuit for a reproduced video signal detects the levels of areference signal in two different frequency bands and, based on a comparison of the

detected levels, selects an equalization curve from a memory (31) and controls theequalization characteristic of an equalizer (11) in the signal path based on the selectedequalization curve. For a video frequency signal, low-pass and high-pass filters (25, 26)provide the two frequency bands for level checking, and for a radio frequency signal twoband-pass filters (42, 43) provide the frequency bands of interest located above andbelow the centre colour carrier frequency. The memory (31) contains a number of

equalization curves, one of which is selected based upon a comparison using the detectedreference signal levels that is performed in a central processing unit (1).

申请人：SONY CORPORATION

地址：7-35 Kitashinagawa 6-chome Shinagawa-ku Tokyo 141 JP

国籍：JP

代理机构：Turner, James Arthur

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