Patent ID: 6522365
Filing Date: 2003-02-18
Classification: G09G,H04N

Abstract:
A method of adjusting the phase of a pixel clock comprising:receiving a first analog video frame signal having a plurality of active video portions; converting each of the active video portions of the analog video frame signal to a first plurality of pixel values in response to a pixel clock, the pixel clock having a period and having a phase relative to the active video portion; determining a first image coordinate using the first plurality of pixel values; decrementing the phase of the pixel clock by a first predetermined value; receiving a subsequent analog video frame signal having a plurality of active video portions; converting each of the active video portions of the subsequent analog video frame signal to a subsequent plurality of pixel values in response to the step of decrementing the phase of the pixel clock; determining a subsequent image coordinate using the subsequent plurality of pixel values; comparing the first image coordinate and the subsequent image coordinate; repeating the steps of decrementing the phase of the pixel clock, receiving a subsequent analog video frame signal, converting each of the active video portions of the subsequent analog video frame signal, and determining a subsequent image coordinate if the first image coordinate equals the subsequent image coordinate; and adjusting the phase of the pixel clock by a second predetermined value if the first image coordinate does not equal the subsequent image coordinate.