Video signal receiver including display synchronizing signal generation device and control method thereof

Abstract

A video signal receiver including a display synchronizing signal generation device and control method are disclosed. The video signal receiver includes: a video processor converting an input analog video signal into a digital signal; a display processor scaling the video signal converted at the video processor with an output resolution; a displaying unit displaying the video signal scaled by the display processor; a detecting unit detecting whether an input vertical synchronization signal (In V-sync) and an output vertical synchronization signal of the analog video signal match; a PLL (Phase Locked Loop) adjusting a pixel clock according to a detection result of the detecting unit; and a timing generating unit generating an output horizontal synchronization signal and the output vertical synchronization signal by use of the pixel clock adjusted by the PLL, and providing the generated output horizontal and output vertical synchronization signals to the display processor and the detecting unit. Accordingly, it is possible to prevent twitching and freezing of a screen, even though input and output frame rates do not correspond.

Description

technical field [0001] The invention relates to a video signal receiver including a display synchronous signal generating device and a control method thereof. More particularly, the present invention relates to a video receiver and a control method thereof, which prevent screen shake and freeze even when an input frame rate and an output frame rate do not coincide. Background technique [0002] Analog video signals receivable by analog video signal receivers generally include CVBS (Composite Video Burst Sync), S-Video signals, and component signals. [0003] The CVBS can be received through a tuner included in an analog video signal receiver or input through a VCR (Video Cassette Recorder) connection terminal. [0004] The S-Video signal can be input into an analog video signal receiver through a terminal connected to an S-VHS (Home Video System), VCR, or DVD (Digital Versatile Disk) capable of outputting S-Video. The S-video signal includes a lu...

AI Technical Summary

Problems solved by technology

[0010] According to the related technology, when the input frame rate is faster than the output frame rate, the image shorter than the display is realized by repeating the image, which causes the screen to shake

[0011] In the related art, when the input frame rate is slower than the output frame rate, the residual image to be displayed is processed by skipping the image, which causes the screen to freeze

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