Digital Audio Matrix Audio Processing Module Design

At present, various radio stations have started basic bid farewell to mix analog and digital era, and have greatly strided toward true digital audio programming era. Digital audio matrix as the core component of the radio station is rapidly growing popularity in the broadcasting equipment industry. Compared with the traditional audio matrix, digital audio matrix is known as its stability and fast switching performance and has been widely used in the transmission, distribution and processing of the audio signal of the radio station.The audio processing module is an important component of digital audio matrix module, constituted by the10processing card and10conversion card.10processing card control parameters responsible for receiving the incoming of the main card and serial audio signals such as gain, limiter, EQ and other processing, UV and other parameters were calculate on the audio signal and the calculated results into the main card.IO processing card is responsible for receiving the main card of the control parameters and dealing with the serial audio signal, such as transmission gain,pressure limit, EQ etc.IO conversion card is responsible for the conversion between the external interface signals and the internal serial audio data; audio processing module is an indispensable digital audio matrix module, the performance of which has an important impact on the digital matrix.This thesis describes the design and implementation of digital audio matrix audio processing module, design, selection of the device from the audio processing module, hardware module design, FPGA and DSP on the audio signal, processing the ARM to the entire module control and other aspects of the audio processing system design are discussed in detail and description, as for the design scheme of the audio processing module, the selection of the device, the design of all hardware module, All kinds of processing of FPGA and DSP to audio signal, and the control of ARM to the module. The thesis is completed the following work: 1. Design of the hardware of the audio processing module. Including component selection, schematic design, PCB drawing, and the debugging of various audio processing system modules.2. Completion of design in multiple modules of the FPGA of the audio processing module. Including: time division multiple access module design, UV calculation module design and the gain block design.3. Complete audio processing system of a variety of audio processing DSP module design. Including EQ module design, the GAIN module design and LIMITER module design.4. complete audio processing system of the ARM design of control procedures. The process completes the communication between the electrical system on a chip initialization and ARM to FPGA.In this thesis, the audio processing digital audio matrix module and a variety of audio interfaces, This paper realized the audio processing module of the digital audio matrix and Various audio interface, including the AES3digital interface, analog audio interfaces, supporting the calculation of the parameters of audio signals VU, professional monitoring brightest in audio signal, having great audio processing capabilities, real-time EQ, pressure limits and gain adjustment function, guaranteeing real-time audio processing. Therefore, this study has a wide range of practical value and of great practical significance.