Patent ID: 6163647
Filing Date: 2000-12-19
Classification: H04N

Abstract:
An apparatus for synchronized playback of system signals having an audio signal component and a video signal component, said apparatus comprising:a clock generator which calculates a reference time indicating reproduction time passage of said audio signal component from an amount of reproduced data of said audio signal component added with a compensation amount, and by referring to a sampling rate of the audio signal component and a frame rate of the video signal component;a delay detector coupled to said clock generator, said delay detector detects a progress of said video signal component by comparing a real frame number added with a compensation number of said video signal component to an ideal frame number, said real frame number indicating a number of processed picture frames of said video frame component, said ideal frame number being the product of said reference time and said frame rate of said video signal component;an audio data counter compensator coupled to said clock generator, said audio data counter compensator calculates said compensation amount from a playback point of said system signal where synchronized playback is requested; anda video frame counter compensator coupled to said delay detector, said video frame counter compensator calculates said compensation number from said playback point of said system signal where synchronized playback is requested.