发明名称 |
Color sign inserting circuit for video signal reproducing system |
摘要 |
A color sign inserting circuit for a video signal reproducing system is disclosed, which comprises a the color burst detecting circuit for extracting color burst from a video signal detected from a recording system, a flywheel oscillator locked to the average values of the frequency and phase of a color burst signal extracted from the color burst detecting circuit for detecting time axis variation components, a phase shifter for controlling the phase of the clock output of the flywheel oscillator, and a sign inserting circuit for superimposing the output of the phase shifter and a sign signal on the video signal. Display of an inserted sign in color in the reproduction of video thus can be realized by merely adding an inexpensive color signal shifter to the conventional functions necessary for the video signal processing.
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申请公布号 |
US4561013(A) |
申请公布日期 |
1985.12.24 |
申请号 |
US19830460079 |
申请日期 |
1983.01.20 |
申请人 |
ASAHI KOGAKU KOGYO KABUSHIKI KAISHA |
发明人 |
FUKUI, TSUTOMU;SHIRAI, TOMOYUKI |
分类号 |
H04N9/74;H04N9/79;(IPC1-7):H04N9/02 |
主分类号 |
H04N9/74 |
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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