Self-adaptive AMR code rate adjusting method based on network states

Abstract

The invention discloses a self-adaptive AMR code rate adjusting method based on network states. The method comprises following steps of 1, determining an initial code mode for a call sender; 2, writing a rate corresponding to the initial code mode of the sender in an RTP packet; 3, transmitting the RTP packet to a receiver; calculating the packet lost and delay parameter of the sender by the receiver; 4, judging whether the current initial code rate of the sender is applicable to the current network state of the receiver or not by the receiver according to the packet lost and the delay parameter; if the current initial code rate of the sender is applicable to the current network state of the receiver, keeping the current code rate; otherwise, changing a CMR (Codec Mode Request) value according to a rate adjusting strategy; 5, writing the rate corresponding to the adjusted CMR value in the RTP packet by the receiver; transmitting to the sender; calculating the packet lost and delay parameter by the sender in a similar way; judging according to the adjusting strategy; changing the CMR value; and adjusting the AMR code rate in real time. The method has the advantages that through real time adjustment of the code rate, constant changes of the network conditions are adapted, and therefore, the good call experience of a user is ensured.

Description

technical field [0001] The invention belongs to the field of mobile Internet voice processing, and describes a network state-based AMR coding rate self-adaptive adjustment method. Background technique [0002] With the continuous development and integration of mobile communication technology and Internet technology, mobile informatization has become more and more closely related to people's lives, and people hope to access the Internet to obtain information and services conveniently anytime and anywhere. [0003] As of the end of August 2015, there were 946 million mobile Internet users in China, and the total number of mobile Internet users exceeded 900 million, accounting for 69.5% of mobile phone users. A large number of mobile Internet-based applications and services extend from entertainment to all aspects of social life. With the development of network technology and the continuous growth of mobile data traffic, the voice call service breaks through the limitations of...

AI Technical Summary

Problems solved by technology

Although the call quality of most mobile Internet calls is basically equivalent to that of traditional calls, there are still problems with unstable call quality under unstable network conditions, which cannot provide people with a good call experience

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