The Studies And Implementation Of Voice Transmission System Based On RSL10

Short-range wireless voice communication technology has been widely used.With the continuous update of application scenarios,users have put forward higher requirements for the voice quality of wireless communication.This paper focuses on the implementation of wireless voice transmission system and solves problems of voice enhancement,echo cancellation and power consumption,combined with related voice processing algorithms and power optimization strategies to improve the quality of voice transmission and reduce transmission power consumption.This paper designs a wireless voice transmission system based on the RSL10 SIP.The RSL10 is a radio system on chip that supports multiple protocols.The Remote Microphone Protocol(RMP)is a wireless audio protocol customized for the RSL10.Based on the analysis of RMP wireless audio protocol and networking protocol,this paper realizes the transmission of voice in multicast and broadcast mode through software and hardware design.In order to suppress the noise,the speech enhancement algorithm of binary microphone array combined with generalized sidelobe canceller and coherent filter is researched and improved.In the noise estimation part of the algorithm,the fast normalized least mean square algorithm is applied for noise estimation.The results of the performance test show that the proposed improved algorithm has good noise reduction performance and can effectively improve the system MOS score.In order to solve the problem of echo,the variable step size normalized least mean square algorithm is selected as the system's echo cancellation algorithm.The results of the performance test show that the proposed echo cancellation scheme can effectively remove the echo signal.In order to solve the problem of the deterioration of the energy efficiency of the master node,the RMP protocol is improved,and the dynamic retransmission mechanism is used to avoid unnecessary retransmissions by the master node.The experimental results of the simulation show that the proposed scheme can significantly reduce the energy consumption of the master device in an environment where the density of slave nodes is low.