ViLTE video call quality control system and method

Abstract

The invention discloses a ViLTE video call quality control system and a ViLTE video call quality control method. The method comprises the steps: S110, establishing a video call between the initiatingend and the receiving end of the ViLTE video call through a ViLTE protocol; S120, the initiating end and the receiving end of the ViLTE video call carry out statistics on the transmission data; S130,when the uplink transmission bandwidth is insufficient or sufficient, correspondingly decreasing or increasing the rate of compressed encoding; S140, when the downlink transmission bandwidth is insufficient or sufficient, feeding back an RTPFB packet to inform that the video compression coding rate needs to be correspondingly reduced or increased; S150, correspondingly reducing or increasing the video compression coding rate according to the received RTPFB packet. According to the method and the device, the video compression coding rate is adjusted in real time by utilizing transmission data statistics in the ViLTE video call, so the change of the signal quality and the uplink and downlink bandwidths of the current mobile communication network is responded in time, the video call quality is improved, the video call function is enhanced, and the video call effect is improved.

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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