IMAGE DISPLAY DEVICE, LIP-SYNC CORRECTION METHOD THEREOF, AND IMAGE DISPLAY SYSTEM

摘要

The present invention relates to an image display device, a lip-sync correction method thereof, and an image display system. The lip-sync correction method of an image display device, according to one embodiment of the present invention, comprises the steps of: receiving an input of an audio delay measurement command from a user; transmitting an audio detection command to a remote control device and outputting a prestored test signal to an external speaker; comparing an audio signal, received from the remote control device, with the test signal and calculating an audio delay value; and correcting a decoding timestamp of an image signal on the basis of the audio delay value. Accordingly, audio and video can be synchronized in accordance with various external audio outputs or external audio devices.