A kind of vilte video call quality control system and method

Abstract

The present application discloses a ViLTE video call quality control system and method, including the following steps. Step S110: the initiator of the ViLTE video call and the receiver establish a video call through the ViLTE protocol. Step S120: Both the initiator and the receiver of the ViLTE video call count the transmission data. Step S130: When the uplink transmission bandwidth is insufficient or sufficient, reduce or increase the compression coding rate accordingly. Step S140: When the downlink transmission bandwidth is insufficient or sufficient, feed back the RTPFB packet to inform that the rate of video compression encoding needs to be reduced or increased accordingly. Step S150: Decrease or increase the rate of video compression coding according to the received RTPFB packet. This application uses transmission data statistics to adjust the rate of video compression and coding in real time in ViLTE video calls, so as to respond in time to changes in the signal quality and uplink and downlink bandwidth of the current mobile communication network, improve the quality of video calls, and enhance the video quality. The call function improves the effect of video calls.

Description

technical field [0001] The application relates to a method for realizing video call in a mobile communication system. Background technique [0002] In LTE (Long Term Evolution, long-term evolution technology) and other mobile communication networks, VoLTE (Voice over LTE, high-definition call) and ViLTE (Video over LTE, high-definition call) based on IMS (IP Multimedia Subsystem, IP Multimedia Subsystem) have been launched. video calls) services, which bring better experience to users. [0003] The implementation method of the existing ViLTE video call is as follows. The initiator and receiver of a ViLTE video call establish a call through the ViLTE protocol, and open a real-time video data transmission channel based on the RTP (Real-time Transport Protocol) protocol. When the initiator sends the first video data to the receiver, the initiator packs the compressed and encoded first video data into an RTP packet and sends it to the receiver. After receiving the RTP packet,...

AI Technical Summary

Problems solved by technology

However, since RTCP packets are sent at fixed intervals, the connection bandwidth allocated to RTCP packets is usually fixed at 5%, and it takes about 3 to 5 seconds to send an RTCP packet, which cannot be used for real-time packet loss feedback.

Moreover, both RTP packets and RTCP packets are transmitted based on UDP (User Datagram Protocol, User Datagram Protocol). When the wireless environment deteriorates, the RTCP packets themselves may be lost on the LTE air interface (air interface, air interface).

Once the initiator cannot receive the feedback information of the RTCP packet, it cannot adjust the rate of the first video compression coding in time, which will affect the quality of video transmission

Therefore, under unfavorable conditions, ViLTE video calls often have blurred screens and freezes, which affect user experience

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