Patent ID: 6380981
Filing Date: 2002-04-30
Classification: H04N

Abstract:
A frame synchronizer comprising:a frame synchronizing means for storing input video signals of a plurality of frames, and outputting the stored video signals one after another; an input/output frame phase difference detection means for detecting a phase difference between a video signal input frame pulse used for storing each of the input video signals in said frame synchronizing means and a video signal output frame pulse used for reading out each of the stored video signals from said frame synchronizing means, a video signal read control means for generating a read control signal for controlling said frame synchronizing means in such a manner as to read out the video signal of a frame other than that of the target frame which was to be read out otherwise, when the input/output phase difference detected by said input/output frame phase difference detection means comes up to an amount of one frame, an audio signal output clock generating means for generating an audio signal output clock in synchronization with a video signal output clock which is used, together with said video signal output frame pulse, for reading out the video signals from said frame synchronizing means, and a sampling rate converting means for converting the sampling rate of the audio input signal to that corresponding to said audio signal output clock, and outputting the input audio signal whose sampling rate has been converted as an audio output signal.