Programmable audio-video synchronization method and apparatus for multimedia systems

(57) The multi-media system containing the abstract audio / video decoder / deconstructivism presser of the contents of a summary indication decrypts / elongates the audio / video-data stream compressed and coded, and generates the image for a display, and the audio signal for 可聴 reproduction. A multi-media system contains the audio / video synchronous circuit, and the video decoder which synchronize the display of an integrated system and a video image with playback of an audio substantially. The way playback of an audio and the display of a video image detect the time of the synchronization having separated is described. A circuit contains three programmable registers, limited State machines, and the full adder that uses an audio presentation time stamp and a video presentation. The rounded programmable bias value which is compared with the difference of a video presentation time stamp and an audio presentation time stamp is used for this method. Since the synchronous state of an audio and video is reflected more correctly, the difference may include potential delay of an audio and a video display device. The circuit area used by the circuit is made into the minimum, without sacrificing the accuracy or speed of a determination contemporary with an audio and video by the slight alternative roundness of an audio presentation time stamp and a video presentation time stamp, or omission.