Design And Realization Of Kara OK Sound Effects Processor Based On SoC

As an important module of audio processing, Kara OK audio processor is the soul of the whole KTV system. However, the audio processors are only authorized to professional tuners in the marketplace so that those audio processors can not meet the personalized needs of users. In addition, with the appearance of 5.1, 7.1 channel hifi system, the speed and resources of the existing DSP operation can not meet the requirements of real-time processing. To solve above problems, it is critical to design an easyer tuning Kara OK audio processor with better user experience and superior system performance and scalability.This thesis aims to design a Kara OK audio processor based on So C. The main work of hardware design includes: design and implement the system's audio input module, audio output module and corresponding interface; realize the system control and display based on the basic principle of the touch screen; according to the function, customize the system to complete the hard-core processing system; according to the Audio processing program, configurate and design the embedded linux system. The software design of embedded system implements as follows: design and implement audio processing modules including echo, reverb, equalization, limiter and howling suppression; achieve a touch screen master control interface, mobile application software and PC applications to meet the needs of multi-terminal access control system.The main contribution of this paper includes:(1) The system implements fine adjustment and one-click configuration based on fitting parameters on the basis of Sound experience, enhancing users` convenience;(2) Sound processor based on the architecture of So C system has more performance and more available resources. It can run complex audio processing with higher computational complexity and space requirements;(3) The multi-terminal of the system can be applicable to different groups of people from ordinary users to professional tuners, including a touch-screen, mobile phone and upper computer software, enhancing users` experience.This study designs and implements a multi-client Kara OK audio processor combined with the scalability of the So C architecture and the multi task of embedded Linux system. The Kara OK audio processor integrates echo and reverb effects with high fidelity, low damage howling suppression function, multi-band equalization, AGC dodge music and other sound effects, and the processing effect has been properly accepted by singers and a turner of co-operative in practical experience. The system can be widely used in KTV, concerts and other entertainment places, which can effectively improve and enhance the overall room sound field effect.