Invention Grant
US4734757A Color burst phase detection system for use in a video disk player system
失效
用于视频盘播放器系统的彩色相位检测系统
- Patent Title: Color burst phase detection system for use in a video disk player system
- Patent Title (中): 用于视频盘播放器系统的彩色相位检测系统
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Application No.: US874674Application Date: 1986-06-16
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Publication No.: US4734757APublication Date: 1988-03-29
- Inventor: Toru Akiyama
- Applicant: Toru Akiyama
- Applicant Address: JPX Tokyo
- Assignee: Pioneer Electronic Corporation
- Current Assignee: Pioneer Electronic Corporation
- Current Assignee Address: JPX Tokyo
- Priority: JPX60-131499 19850617
- Main IPC: H04N9/87
- IPC: H04N9/87 ; H04N9/85 ; H04N9/873
Abstract:
A system for detecting an inversion of burst phase of a video signal, includes a reference color subcarrier signal generator for generating a reference color subcarrier signal whose frequency is equal to the frequency of the color burst signal of the video signal, and a phase comparator for comparing in phase the color burst signal of the video signal and the reference color subcarrier signal. When the level change in an output signal of the phase comparator exceeds a predetermined reference level, the system produces an indication signal indicating that the burst phase of the video signal is inverted.
Public/Granted literature
- US4335946A Controlled disengaging device in automatic exposure camera of the lens stop value control type Public/Granted day:1982-06-22
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