发明名称 |
IMAGE QUALITY IMPROVING APPARATUS AND IMAGE QUALITY IMPROVING METHOD |
摘要 |
Unnecessary flare correction at the boundary between a blanking area and video signal area is suppressed. An image quality improving apparatus includes 2-dimensional low-pass filter circuit 2 that extracts low-frequency components from an input video signal; subtractor circuit 4 that obtains high-frequency components by subtracting the low-frequency components extracted by 2-dimensional low-pass filter circuit 2 from the input video signal; and adder circuit 6 that adds the high-frequency components obtained by subtractor circuit 4 as a correction signal to the input video signal. The input video signal contains blanking signals without any video information. 2-dimensional low-pass filter circuit 2 starts extraction of the low-frequency components after a lapse of a predetermined unit time from when the input video signal changed from the blanking signal to the signal that contains the video information. |
申请公布号 |
WO2008091024(A3) |
申请公布日期 |
2008.11.13 |
申请号 |
WO2008JP51597 |
申请日期 |
2008.01.25 |
申请人 |
NEC DISPLAY SOLUTIONS, LTD.;NEZU, EIFU |
发明人 |
NEZU, EIFU |
分类号 |
G09G5/00;G09G5/36;H04N5/208;H04N5/66;H04N5/74 |
主分类号 |
G09G5/00 |
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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