| CPC H04N 21/4307 (2013.01) [G01S 5/0284 (2013.01); H04R 1/20 (2013.01)] | 9 Claims |
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1. A method of synchronizing playback of video and audio of a digital content, the method comprising:
transmitting, by a plurality of connected devices connected to a network, a video playback delay time, an audio playback delay time, and position information to a master device;
receiving a video playback delay time list or a video playback sync timestamp during a video playback duty cycle;
receiving at least one of a virtual synchronization audio delay distance, audio delay distances of the connected devices, a sweet spot position, an audio playback delay time list, and an audio playback sync timestamp during an audio playback duty cycle;
determining a video playback delay time correction amount from the video playback delay time list during the video playback duty cycle, and correcting the video playback sync timestamp in consideration of the video playback delay time correction amount; and
correcting the audio playback sync timestamp with the audio playback delay time correction amount determined by using at least one of the virtual synchronization audio delay distance, the audio delay distances of the connected devices, the sweet spot position, and the audio playback delay time list.
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