发明授权
US4648113A Method and apparatus for providing a visual indication of a relationship
between two signals
失效
用于提供两个信号之间的关系的视觉指示的方法和装置
- 专利标题： Method and apparatus for providing a visual indication of a relationship between two signals
- 专利标题（中）： 用于提供两个信号之间的关系的视觉指示的方法和装置
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申请号： US774781申请日： 1985-09-11
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公开(公告)号： US4648113A公开(公告)日： 1987-03-03
- 发明人: John J. Horn , Daniel G. Baker
- 申请人： John J. Horn , Daniel G. Baker
- 申请人地址： OR Beaverton
- 专利权人： Tektronix, Inc.
- 当前专利权人： Tektronix, Inc.
- 当前专利权人地址： OR Beaverton
- 主分类号： H04N17/02
- IPC分类号： H04N17/02 ; G09G1/08 ; H04N17/00 ; H04N17/06 ; H04S7/00 ; H04R5/00
摘要：
A visual indication of the relationship between first and second electrical signals, such as the left and right channel signals in a stereophonic audio system, is provided through use of a video vectorscope. The first and second signals are used to modulate the amplitude of two sinusoidal waves at a subcarrier frequency and in phase quadrature, so as to synthesize the chrominance portion of a composite video signal. The two modulated sine waves are additively combined, and the resulting signal is applied to the input terminal of the vectorscope.
公开/授权文献
- US5974321A Method for selecting a signal, and a cellular radio system 公开/授权日：1999-10-26
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