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    • 2. 发明授权
    • Multi-system video signal demodulating apparatus
    • 多系统视频信号解调装置
    • US5835157A
    • 1998-11-10
    • US494774
    • 1995-06-26
    • Shinichirou MiyazakiMasayuki MiyagawaAkira Shirahama
    • Shinichirou MiyazakiMasayuki MiyagawaAkira Shirahama
    • H04N9/80H04N9/00H04N9/64H04N9/66H04N5/46
    • H04N9/642
    • A multi-system video signal demodulating apparatus includes at least a color signal processing unit and a color discriminating function for demodulating a component video signal from video signals of two or more different systems. The multi-system video signal demodulating apparatus includes a detector for detecting continuity between vertical synchronizing signals of the input video signals. The color discriminating function is executed when the detector detects a discontinuity between the vertical synchronizing signals. The continuity between the vertical synchronizing signals of the input video signals is detected. The color discriminating function is executed when a discontinuity between the vertical synchronizing signals is detected during continuity detection. A synchronizing signal of an input video signal is discriminated. A frequency of a color burst signal is discriminated based on a result of the synchronizing signal discrimination. The color burst discrimination is executed or stopped based on a result of the color burst discrimination. An amplitude of the color burst is discriminated based on a result of the synchronizing signal discrimination. A phase of the color burst is discriminated based on a result of the amplitude detection. A television system of the video signal is discriminated based on a result of the phase detection. An oscillation frequency of the crystal oscillator is discriminated based on a discriminated result of the television system discrimination.
    • 多系统视频信号解调装置至少包括彩色信号处理单元和用于解调来自两个或更多个不同系统的视频信号的分量视频信号的颜色识别功能。 多系统视频信号解调装置包括用于检测输入视频信号的垂直同步信号之间的连续性的检测器。 当检测器检测到垂直同步信号之间的不连续性时,执行颜色识别功能。 检测输入视频信号的垂直同步信号之间的连续性。 当在连续性检测期间检测到垂直同步信号之间的不连续性时,执行色彩识别功能。 鉴别输入视频信号的同步信号。 基于同步信号辨别的结果来判别色同步信号的频率。 基于颜色突发鉴别的结果执行或停止色同步信号辨别。 基于同步信号鉴别的结果来识别色同步信号的幅度。 基于幅度检测的结果来鉴别色同步的相位。 基于相位检测的结果来辨别视频信号的电视系统。 基于电视辨识的辨别结果来辨别晶体振荡器的振荡频率。