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    • 3. 发明申请
    • A METHOD AND A SYSTEM FOR CALIBRATING AN ANALOGUE VIDEO INTERFACE
    • 一种用于校准模拟视频接口的方法和系统
    • WO2006005575A1
    • 2006-01-19
    • PCT/EP2005/007541
    • 2005-07-08
    • BARCO NVCAPPAERT, BartVANBRABANT, Martin
    • CAPPAERT, BartVANBRABANT, Martin
    • H04N5/12
    • G09G5/008H04N5/06
    • The invention relates to systems and methods for calibrating an analogue video interface. Due to the lack of pixel clock signal (206) information in the video-handling unit, a sample clock signal (202) needs to be generated, which should correspond with the unknown pixel clock signal (206). The types of signals transmitted to the video-handling unit may correspond with strange display formats and no up-front information may be present. The present invention provides methods and systems for automatic calibration of an analogue video interface. These are based on obtaining an analogue video signal (208) that is based on a pixel clock signal (206), generating a sample clock signal (202) having a first frequency by means of a PLL feedback divider having a value, determining a phase-relation between the video signal (208) and the sample clock signal (202) and evaluating the phase-relation to determine if the correct sample clock signal (202) is generated. The method is looped until a correct value for the PLL feedback divider is obtained so as to obtain a correct sample clock signal (202).
    • 本发明涉及用于校准模拟视频接口的系统和方法。 由于在视频处理单元中缺少像素时钟信号(206)信息,需要生成应该与未知像素时钟信号(206)对应的采样时钟信号(202)。 发送到视频处理单元的信号的类型可以对应于奇怪的显示格式,并且不能存在前置信息。 本发明提供了用于模拟视频接口的自动校准的方法和系统。 这些基于获得基于像素时钟信号(206)的模拟视频信号(208),借助于具有值的PLL反馈分频器产生具有第一频率的采样时钟信号(202),确定相位 视频信号(208)和采样时钟信号(202)之间的相关性,并且评估相位关系,以确定是否产生了正确的采样时钟信号(202)。 该方法循环,​​直到获得PLL反馈分频器的正确值,以便获得正确的采样时钟信号(202)。