Audio and video synchronous adjustment method and device

A technology for audio and video synchronization and adjustment methods, which is applied in image communication, selective content distribution, electrical components, etc., and can solve problems such as inconsistent NTP time filling, repackaging, and fast-forwarding of audio and video streams.

Active Publication Date: 2019-09-10
TD TECH COMM TECH LTD
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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 af

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  • Audio and video synchronous adjustment method and device

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Embodiment Construction

[0069] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0070] figure 1 It is a schematic flow diagram of the method of the embodiment of the present invention, such as figure 1 As shown, the audio-video synchronization adjustment method realized in this embodiment mainly includes:

[0071] Step 101, the recording end sends the audio stream sender report (SR) and the video stream SR to the playback end, wherein the audio stream SR and the video stream SR all carry the Network Time Protocol (NTP) time of the current system and the corresponding real-time transport protocol ( RTP) timestamp.

[0072] In this step, in order to ensure that the playback end can accurately select the currently adopted audio and video synchronization method to ensure that the audio and video playback on the playbac...

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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 ...

Claims

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Application Information

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IPC IPC(8): H04N21/43H04N21/433H04N21/6437H04N21/8547
CPCH04N21/4305H04N21/4331H04N21/4334H04N21/6437H04N21/8547
Inventor 丁长文方伟李智王亮
Owner TD TECH COMM TECH LTD
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