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how to detect resolution of input video for TVP7002?

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The TVP7002 must be configured via I2C for specific resolution of input VGA (or component) video. Thinking about application as stand-alone VGA-2-DVI converter for multiformat (DMT, CVT, SDTV, HDTV) VESA sources, how the video resolution can be detected? Is it enough to measure frequency and polarity of Hsyn and Vsyn ?

Thanks in advance


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