| 摘要 |
An image signal receiving apparatus for fixing a pixel clock and a control method therefor are provided to prevent a picture sparkle phenomenon and a picture disconnection phenomenon although an input frame rate and an output frame rate are different by fixing the pixel clock and interworking an output vertical synchronous signal to an input vertical synchronous signal. A video processor(110) converts an inputted analog video signal into a digital signal. A display processor(120) scales the video signal converted in the video processor(110) at output resolution. A display unit(130) displays the video signal scaled by the display processor(120). A detecting unit(140) detects whether an input vertical synchronous signal of the analog video signal is matched with an output vertical synchronous signal. A PLL(Phase Locked Loop)(150) generates a pixel clock. A timing generating unit(160) adjusts a horizontal frequency and a vertical frequency by the detected result of the detecting unit(140), generates a horizontal synchronous signal and a vertical synchronous signal by using the adjusted horizontal and vertical frequency and the pixel clock, and provides the horizontal synchronous signal and the vertical synchronous signal to the display processor(120) and the detecting unit.
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