发明名称 |
Picture information detecting apparatus for a video signal |
摘要 |
A picture information detecting apparatus includes a picture area signal output circuit to detect a picture area excluding black band portions from the input video signal to produce a picture area signal to designate the picture area from which picture information is detected. Also included is a picture information detecting circuit for detecting picture information from the input video signal in the designated area. A picture quality compensating circuit is also provided for compensating the video input signal using the detected picture information to produce the gradation compensated video signal. An EDTV 2 discriminating circuit may also be included to determine if the video input signal is an EDTV 2 signal.
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申请公布号 |
US5748257(A) |
申请公布日期 |
1998.05.05 |
申请号 |
US19970852670 |
申请日期 |
1997.05.07 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
KAWABATA, MINORU;KAGEYAMA, ATSUHISA |
分类号 |
H04N5/57;H04N5/20;H04N5/44;(IPC1-7):H04N5/20;H04N5/46 |
主分类号 |
H04N5/57 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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