Method for guaranteeing smooth long-distance real-time transmission of global UDP audio and video streams

Abstract

The invention discloses a method for guaranteeing smooth long-distance real-time transmission of global UDP audio and video streams. By customizing a transmission protocol, dynamically collecting thepacket loss rate of a transmission link, dynamically grouping, forwarding an encoding strategy in real time, dynamically opening FEC, dynamically determining redundancy and the grouping size, the transmission real-time performance is ensured, the use of network bandwidth is saved on the premise of ensuring smooth audio and video transmission, and the transnational audio and video call experience of a user is improved. The beneficial effects of the invention are that: the anti-weak network and anti-network jitter effects are better; through practical testing, under the condition that the network packet loss rate is 30 percent, audios and videos are basically smooth, redundant packets cannot be generated under the condition of a good network, the network bandwidth cannot be wasted, the method is completely compatible with NACK, the method can take effect at the same time, a user-defined transmission protocol does not concern what transmission protocol is used by bottom-layer audios and videos, and the method is compatible with all current UDP-based audio and video transmission protocols.

Description

technical field [0001] The present invention relates to the related technical field of audio and video network transmission, in particular to a method for ensuring smooth long-distance real-time transmission of global UDP audio and video streams. Background technique [0002] In today's world of global integration, long-distance real-time transmission of global audio and video streams has a wide range of application scenarios: such as transnational education, transnational conferences, transnational live broadcast and other scenarios. In the above application scenarios, the fluency and real-time performance of audio and video greatly affect the user experience, and multinational networks are usually not very stable and prone to packet loss, so for multinational audio and video service providers, it is necessary to find a way To ensure the smoothness and real-time performance of cross-border audio and video transmission. [0003] At present, there are two main methods for co...

AI Technical Summary

Problems solved by technology

It looks very good, but there are still some problems in the FEC scheme that we need to solve: First, how should we confirm the redundancy? In a real network, the packet loss rate is not constant. It was 10% in the last second, and it may be 30% in the next second. Second, how many packets should we group into one group? If the number of packets in a group is too large, it will take too long to restore the original packets, and it will also cause freezes; third, how should we code to ensure real-time performance? It is impossible for us to wait for a group of data packets to be collected at the sending end, then calculate the redundant packets, and then send them together