The Design Of Network Digital Audio Processing System Base On CobraNet

With the rapid development of Electronic Science and technology and the improvement of people's living standard,multimedia audio has been integrated into people's lives.Including the music playing,conference amplifying,streaming media transmission and mobile communication,audio plays a very important role.Now the audio signal quality is higher and higher,the data volume is also growing,transmission and processing technologies have a new requirement standards,and network transmission of audio and digital processing has become a trend.Long-distance transmission network sharing and digital signals anti-interference ability has obvious advantages over traditional audio technology.Therefore,this paper aims to design a web-based transmission of digital audio processing system.Aiming at the development of audio signal processing technology and application needs.Firstly,through market research and a great number of literatures about the current market network audio transmission using CobraNet Technology,and most of the audio signal processing using digital processing technology.After analysis and comparison of system solutions principles,finally decided to adopt the Cirrus Logic company's CS496122 digital audio signal processing and network package technology,at the same time,decided to adopt the Cortex-M3 processor of ST company through the HMI interface to control the audio signal processing parameters and control the audio specific processing mode,using 24 bit audio AD/DA dedicated to achieve digital audio signal conversion.System through on position machine to achieve the gate of the audio signal threshold setting,gain adjustment,mute control,high-pass cutoff frequency setting,a low-pass cut-off frequency setting,PEQ parameter settings,limiter threshold setting,auto mixing,matrix array output,audio processing mode calls,etc.Users can operate in real time processing of audio signals through on position machine.After the overall performance test system,the system meets the requirement of design aim and function index,It can achieve real-time audio signal low-pass filtering,PEQ parametric equalizer,compressor,gain,etc.processing,and test the frequency response curve with the design requirements.