Patent ID: 9489980
Filing Date: 2016-11-08
CPC Classification: G11B,H04N

Claim Text:
1. A video/audio synchronization apparatus comprising: a decoder configured to decode a frame contained in encoded video data and determine playback time of the frame based on a first clock signal, and decode encoded audio data and determine playback time of an associated audio signal contained in the decoded audio data and to be played back simultaneously with the frame, based on a second clock signal different from the first clock signal; a silent period detector configured to detect a silent period from within the associated audio signal; a delay time measure configured to measure a delay time representing how much the playback time of the associated audio signal determined based on the second clock signal is delayed with respect to the playback time of the frame determined based on the first clock signal; and an audio timing adjuster configured to reduce a difference between the playback time of the frame and the playback time of the associated audio signal by skipping a silent period contained within a period of the associated audio signal when the delay time indicates that the playback time of the associated audio signal is later than the playback time of the frame, while by repeating the silent period when the delay time indicates that the playback time of the associated audio signal is earlier than the playback time of the frame.