Audio/video live broadcast method and device, and control method and device

Abstract

The invention discloses a control method for delay jitter removal based on a TCP live broadcasting system. The control method comprises the steps of: judging whether a current buffer region is empty; if not, shortening the data duration of the current buffer region when a current adjustment period arrives and if a difference between the maximum buffer region data duration and the minimum buffer region data duration in the current adjustment period is smaller than a preset buffer region duration jitter threshold and the minimum buffer region data duration is greater than a preset minimum buffer region duration threshold; if the current buffer region is empty, enlarging an initial buffer region data duration when the empty buffer region receives a first data packet, wherein the enlarged initial buffer region data duration is an increasing function of a second biggest delay jitter value, the initial buffer region data duration is the buffer data duration needed by the buffer region from being empty to play-recovering, and the second biggest delay jitter value is a second biggest value of time differences of reception of two continuous data packets from a period of time before the buffer region is empty to the time when the first data packet is received.

Description

technical field [0001] The present invention relates to the technical field of network transmission, in particular to an audio / video live broadcast method and device based on a TCP live broadcast system for eliminating time delay jitter, and a corresponding control method and device. Background technique [0002] The live video system is to collect and encode live video signals (such as cameras, video cameras) and voice signals (such as microphones) in real time, and send them to the server through the network, so that users can watch them in real time through the network. The simplest live video system model consists of five links: acquisition, encoding, transmission, decoding, and playback. Due to practical factors, the realization of the live video system is not so simple, which involves a lot of professional technology. [0003] Delay jitter (jitter), as an important QoS parameter in a live video system, has a direct impact on the quality of voice communication. Theref...

AI Technical Summary

Problems solved by technology

The advantages of this method are: the model is simple, easy to implement, and high reliability; the disadvantage is: when the network jitter is large, the packet loss rate is high, and when the network delay and jitter are small, the delay is large, and the applicability is not very strong

However, the adaptive jitter buffer control method used in the prior art is to increase or decrease the buffer size according to the actual network jitter situation, and the increased or decreased value is often a fixed value

That is to say, for the jitter of the network that needs to increase / decrease the buffer, the current buffer is increased / decreased by a fixed value, and the difference between the jitter of the network that needs to increase / decrease the buffer is ignored , so that the dynamic adjustment is not smooth enough

Therefore, it is not suitable for live video systems that require high smoothness

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