Design And Implementation Of Audio-Visual Reproduction System Based On Wireless Location

With the development of economy and society,opera,drama,concert and other stage arts have entered the daily life of the people.However,the traditional stage sound reinforcement system generally uses mono-channel microphone to collect ac-tors'voices,which are amplified and presented directly to the audience.All actors'voices seem to be emitted from the same place.The audience can't feel the difference of voices caused by the location and movement of actors.Especially when more than one people are showing at the same time,the audience can't distinguish who is per-forming,which greatly alleviates the performance effect.This paper studies and implements an audio-visual reproduction system based on UWB wireless location,which is mainly used to solve the problem that the existing stage sound reinforcement system can't effectively present actors'audio-visual.The solution is to set up a series of UWB wireless positioning system on the stage for real-time acquisition of actors'position information,including three fixed anchors provid-ing positioning coordinates and one label moving with actor,communication between label and anchors,using Double-sided Two Way Ranging method to measure the dis-tance between label and anchors,using Trilateral Positioning method to calculate the coordinates of the label,the position coordinates of the label are collected by the ref-erence anchor point and transmitted to the host computer through the serial port,which is displayed graphically on the host computer.Using XAudio2 audio-visual re-production technology,the mono-channel sound collected by the microphone is pro-cessed,and the stereo sound signal is generated by integrating the position infor-mation of the actors,which is presented to the audience through the stage sound rein-forcement system.The experimental results show that this method can effectively im-prove the stage sound effects.The first half of the paper introduces the background of the research and the prin-ciple of binaural localization,compares the main principles and technical characteris-tics of several commonly used audio-visual positioning technology and indoor wire-less positioning technology,and finally chooses a solution which combines Microsoft XAudio2 technology with UWB positioning technology.The second half focuses on the system composition,hardware and software design and experimental verification of the solution.The wireless positioning part is made of SCM hardware,and the au-dio-visual reproduction function is accomplished by XAuido2 technology software on Windows system.Finally,we analyze the shortcomings of this solution,and put for-ward the directions of the next work.The main innovations of this paper are as follows:1.The integration of UWB wireless positioning and audio-visual reproduction technology effectively solves the problem of sound source positioning and audio-visual restoration;2.Modifying and improving the TREK 1000 suite's localization algorithm,and applying the UWB wireless positioning technology to the specific scene of the stage to achieve better ac-tor positioning;3.This paper designs an experimental method which combines quali-tative and quantitative methods to test the actual effect of the system,the method is effective and feasibleThe audio-visual reproduction system based on wireless positioning described in this paper effectively solves a practical problem in stage performance..Through minor modification of the existing stage audio system,it achieves obvious sensory effect improvement and has broad market prospects.