AUDIO/VIDEO INTERACTION LOW-DELAY TRANSMISSION METHOD AND BACKGROUND SERVER

Disclosed in the present invention are an audio/video interaction low-delay transmission method and a background server. The method comprises the following steps: a driving receiving end maintaining long connection communication with a sending end by means of a TCP, and the receiving end sending a video frame feature to the sending end; sending, by the sending end to the receiving end, a video frame satisfying the video frame feature, and accumulating the number of video frames obtained by the receiving end within several continuous preset time periods; determining whether the number of video frames obtained within a preset number of preset time periods in the plurality of continuous preset time periods satisfies a preset range, if yes, determining that a network condition is normal, and maintaining an original state, and if not, determining that the network condition fluctuates; and adjusting a current code rate level of the receiving end, generating a new video frame feature, and then sending the new video