Video conference apparatus and method for audio-video synchronization

摘要

An audio-video synchronization method is executable in a video conference device. The method includes determining a first presence time of a predetermined visual effect in a captured video sample stream and a second presence time of a predetermined sound effect in a captured audio sample stream, calculating a time difference between the first and second presence time, and adjusting timestamps of each real-time transport protocol packet in an audio stream sent out by the video conference apparatus based on the time difference. The method further includes receiving an adjustment value from an user input, and adjusting timestamps of each real-time transport protocol packet in an audio stream received by the video conference apparatus based on the adjustment value.

主权项

1. 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.