Audio and video synchronous adjustment method and device

Abstract

The invention discloses an audio and video synchronization adjustment method and device, and the method comprises the steps that a recording end sends an audio stream sending end report (SR) and a video stream SR to a playing end, and the audio stream SR and the video stream SR both carry NTP time of a current system and a corresponding RTP timestamp; when the playing end receives a first audio stream SR and a first video stream SR of a current audio and video service from the recording end, according to NTP time carried by the audio stream SR and the video stream SR received this time, a current audio and video synchronization mode is determined, and the audio and video synchronization mode comprises an audio and video synchronization mode based on a timestamp and an audio and video synchronization mode based on a cache; and when the playing end receives the audio stream SR and the video stream SR of the current audio and video service again from the recording end, the current audio and video synchronization mode is determined according to the NTP time carried by the audio stream SR and the video stream SR received at this time and the NTP time of the audio stream SR and the videostream SR received at the last time. According to the invention, audio and video synchronization of the receiving end can be realized.

Description

technical field [0001] The invention relates to computer application technology, in particular to an audio and video synchronization adjustment method and device. Background technique [0002] The audio and video synchronization service is a key indicator that affects the perception of video services. The current mainstream audio and video synchronization algorithms are based on the Network Time Protocol (Network Time Protocol, NTP) time and timestamp in the sender report (Sender Report, SR). Synchronous. The audio and video synchronization algorithm based on timestamp is simple to implement and the synchronization effect is good, but the algorithm itself requires that the NTP time in the SR report of the audio stream and the video stream refer to the same clock source and be filled in correctly. Once the NTP time sources of the audio and video streams are inconsistent, the receiving end continues Using timestamps for synchronization will lead to abnormal phenomena such as ...

AI Technical Summary

Problems solved by technology

The audio and video synchronization algorithm based on timestamp is simple to implement and the synchronization effect is good, but the algorithm itself requires that the NTP time in the SR report of the audio stream and the video stream refer to the same clock source and be filled in correctly. Once the NTP time source of the audio and video streams is inconsistent, the receiving end continues Using time stamps for synchronization will lead to abnormal phenomena such as fast forwarding, which will seriously affect business perception

[0003] Although the existing agreement stipulates that the NTP time in the SR report of the audio and video streams uses the same clock source, in actual applications, the implementations of various manufacturers are inconsistent. This may lead to inconsistent filling of the NTP time of the audio and video streams, or in the A scenario where a stream is repackaged during transmission, which causes the NTP time of the audio and video streams received by the receiving end to be inconsistent

Images