Patent ID: 7535982
Filing Date: 2009-05-19
Classification: G09G,H03M,H04L

Abstract:
1. A method for adjusting a phase of a sampling frequency of an analog-to-digital converter (ADC), comprising: converting using the ADC an analog signal into a first digital signal according to a first phase of the sampling frequency during a first time interval; calculating a first value according to the first digital signal based on a predetermined algorithm; converting the analog signal into a second digital signal according to a second phase of the sampling frequency during a second time interval; calculating a second value according to the second digital signal based on the predetermined algorithm; and adjusting the phase of the sampling frequency according to the first value and the second value; wherein the analog signal is a video signal, and the first time interval, and the second time interval as well, is a time interval between any two consecutive vertical synchronization signals of the video signal.