Patent ID: 7738499

Claim:
An audio/video synchronizing system for synchronizing sounds of a set of contents output from a speaker connected to a contents server and images of the set of contents output from a monitor, the system comprising: a contents server; and a monitor; the contents server including: reference clock time wired transmission means for transmitting reference clock time of the contents server to the monitor by wire; image transmission means for setting up a time stamp with an attached clock counter value corresponding to an initial delay time for delaying the output timing of the audio packets and the video packets of the set of contents, wherein the initial delay time is greater than a predetermined largest transmission delay of wireless transmission of the video packets from the contents server to the monitor, and wirelessly transmitting the video packets to the monitor with the time stamp showing the attached initial delay; and sound outputting means for reproducing the sound packets according to the reference clock time of the contents server and the time stamp and outputting the sounds of the set of contents; and the monitor including: image receiving means for receiving the wirelessly transmitted video packets; reference clock time synchronizing means for receiving the reference clock time transmitted from the contents server by wire and synchronizing the reference clock time of the contents server and a reference clock time of the monitor; transmission delay time computing means for computing the transmission delay time due to the wireless transmission according to the reference clock time of the monitor and the reference clock time information of the contents server attached to the video packets; delay correcting means for compensating the transmission delay time by correcting the reference clock time information attached to the video packets according to the transmission delay time; and image outputting means for synchronizing the output timing of the images and that of the sounds by decoding the video packets according to the corrected reference clock time information and the time stamp with the added clock counter value corresponding to the initial delay time, such that output of the images is after elapse of a time, interval starting from a time when the video packets are received, the time interval being equal to a difference between the initial delay time and the transmission delay time.