黄花决明
专利名称：SEPARATE LUMINANCE CONVERSION
SYSTEM OF NTSCCSYSTEM COLOR VIDEO
SIGNAL
发明人：SUZUKI KANJI
申请号：JP5571579
申请日：19790509
学生会英文公开号：JPS55147891A
有趣生活
公开日：
胃食管反流怎么办
19801118
专利内容由知识产权出版社提供
摘要：PURPOSE:To make a picture clear by using a high-speed memory to incorporate desired I/O luminance signal characteristic data in the luminance signal of the color video signal and by correcting luminance to obtain a corrected video analogue signal. CONSTITUTION:Only the luminance signal is extracted from the video signal by color video signal controller 1 and has the level fixed by a clamp circuit and is made into an analogue signal by a level adjustment equipment and is nt to next- stage high-speed
A/D converter 3 and is converted to a digital signal. This signal is given to the address line of high-speed memory 4 as an input. I/O luminance characteristic data is stored previously in high-speed memory 5, and a lector switch is ud to lect one. After that, the digital luminance signal is obtained from memory 4 and is converted to the corrected analogue luminance signal again by high-speed D/A converter 6 and is synthesized by synchronous mixer 7 and color signal mixer 8.
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申请人：EDETSUKU KK
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