发明名称 |
Picture-display-region discriminating apparatus |
摘要 |
A picture-display-region discriminating apparatus comprising a device for setting a number of picture detection regions on a display screen of a television receiver, a detecting device for detecting a level of a video signal corresponding to each picture detection region by utilizing two reference levels, and a device for determining whether or not a picture exists in each picture detection region based on detection results from the detecting device. One of the reference levels utilized by the detecting device is a black level of a luminance signal of the video signal and the other reference level utilized therewith is a white level of the luminance signal of the video signal.
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申请公布号 |
US5990971(A) |
申请公布日期 |
1999.11.23 |
申请号 |
US19960665880 |
申请日期 |
1996.06.19 |
申请人 |
SONY CORPORATION |
发明人 |
NAKAI, KENZO;YAMAMOTO, YUKIHIKO |
分类号 |
H04N5/46;G06K9/36;H04N5/44;H04N7/00;H04N7/015;(IPC1-7):H04N5/46 |
主分类号 |
H04N5/46 |
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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