基于NIOS Ⅱ的数字音频采集系统设计及实现  

Digital Audio Acquisition System Design and Realization Based on Nios Ⅱ

作　　者：蒋敏[1] 景新幸[1] 

机构地区：[1]桂林电子科技大学,广西桂林541004

出　　处：《电声技术》2012年第11期31-34,共4页Audio Engineering

基　　金：国家自然科学基金项目(609661002)

摘　　要：以FPGA芯片的目标板EP2C70F896C6N为系统平台,利用SOPC技术,根据实际需求自行架构SOPC硬件电路,通过ALTERA公司的NIOS Ⅱ控制I2C总线、AUDIO控制器、SDRAM控制器等,写采集音频数据的应用程序及扩展功能应用程序,实现了数字音频A/D,D/A转换、存储、回放、LCD显示等功能。同时结合Matlab2010版本软件对所采集音频数据进行仿真。实践证明,系统具有集成度高、稳定性强、扩展性好、实时性强等特点。With FPGA chips EP2C70F896C6N target board for the system platform, using SOPC technology and construc- ting SOPC hardware, I2C bus, AUDIO, SDRAM are controled by NIOS II of ALTERA. System writes digital audio applica- tion program and function expansion application program, to realize A/D, D/A digital audio conversion, storing of audio signal, LCD displaying, etc. Meanwhile, the system combines with Madab2010 software to simulate collected digital audio. Practice has proved, the characteristics of system are integrated with high stability and precision, good scalability, good real-time.

关 键 词：FPGA SOPC NIOS Ⅱ AUDIO 数字音频 

分 类 号：TN912[电子电信—通信与信息系统]