Patent ID: 8830290

Claim:
An audio-video synchronization method of a video conference apparatus, wherein the video conference apparatus comprises a memory system, a camera and a microphone which are in communication with the video conference apparatus, the method comprising: capturing a predetermined visual effect and a synchronized predetermined sound effect by the camera and the microphone, respectively; encoding a video sample stream and an audio sample stream, wherein the video sample stream comprises the predetermined visual effect and the audio sample stream comprises the predetermined sound effect; storing the video sample stream and the audio sample stream in the memory system; determining a first presence time of the predetermined visual effect in the stored video stream; determining a second presence time of the predetermined sound effect in the stored audio stream; calculating a time difference between the first presence time and the second presence time; storing the time difference in the memory system; and subtracting the stored time difference from timestamps of each real-time transport protocol packet in an audio stream of by the video conference apparatus if the first presence time is ahead of the second presence time; and adding the stored time difference to timestamps of each real-time transport protocol packet in the audio stream of the video conference apparatus if the first presence time is behind the second presence time.