Research On Audio Processing System Of Car Audio And Implementation On DSP

With the development of society,human life has become increasingly colorful,more and more leisure have come into human life.Among them,the music has gradually developed into a main leisure of human beings.At the same time,the requirements of music quality have become higher and higher.The digital audio processing system can effectively enhance the sound quality,which can greatly enhance the listening experience,so it is of great significance for the research and implementation of digital audio processing system.Compared to the small interior space and single mixer of audio,the paper aims at the insufficient musical effects of car audio,studying the digital audio processing system and completing the design of digital audio processing system.And then build a simulation platform,verifying the feasibility of the system scheme,which will be transplanted to the DSP to achieve the ultimate programs.The main contents of this paper include:(1)Analyze the functional requirements and performance requirements of digital audio processing system.And design the overall program audio processing system,which is based on the DSP platform.It supports multi-channel input and output,and can provide a balanced,delay and other sound adjustment mode.(2)Low-frequency branch,high-frequency branch and time domain part of the design of digital audio processing system is done in the thesis,in view of the sensitivity of the human ear for different audio signals,time domain and frequency domain processing phase process is adopted in this design approach combining,for precise regulation of low-frequency domain processing branch for low-frequency accuracy requirements using time domain processing branch.(3)Simulation and analysis for digital audio processing system is done in this thesis,simulation of the complete system is based on matlab platform,wherein the audio processor Simulink toolbox to build the link,is responsible for processing an audio signal;mixer using GUI functionality analog,audio signal for sound regulation;audio processing parameters is used to be calculated by matlab programming.The simulation results show the feasibility of the digital audio processing system.(4)Migration simulation tests of digital audio processing system to DSP platform,mainly to complete the DSP hardware settings and software implementation,software implementation includes start processing DSP,initialization parameters and data processing.