Patent ID: 6744472
Filing Date: 2004-06-01
Classification: G06F,G06T,G09G,H04N

Abstract:
A video synchronizing mechanism comprising:a first sample rate converter for converting a sampling rate of a stream of video samples from a first sample rate to a first converted rate, said first sample rate converter comprising: a chroma tracker capable of tracking phase and frequency of chroma bursts, comparing them against a predetermined pattern and generating an error signal based on the result of the comparison; and a low pass filter for receiving and filtering the error signal from the chroma tracker to generate an adjustment value, wherein the adjustment value is used to adjust the first sample rate or a first down-sampling ratio, which is a ratio between the first sample rate and the first converted rate; a filter for processing at least some of the video samples having the first converted rate; and a second sample rate converter for converting the sampling rate from the first converted rate to a second converted rate.