基于TDM的多通道声卡设计  

TDM-based design of multi-channel sound card

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作  者:周旺[1] 姜弢[1] 

机构地区:[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出  处:《应用科技》2010年第10期31-35,共5页Applied Science and Technology

基  金:黑龙江省自然科学基金资助项目(AF200611)

摘  要:为了提高航行参数记录仪(VDR)声卡利用率、减少繁琐操作流程、增强系统数据安全性,基于TDM(time-division multiplexing)方法、音频数字信号处理PCI(peripheral component interconnect)总线多通道数据传输技术,应用DSPC54与AMBE-3000的总线连接方式,利用DSP高速并行处理数据特点及AMBE-3000语音编解码的低速码率、全双工优点,提出具有实时多路语音数据处理功能、低系统复杂度及操作简易等优点的船载VDR声卡设计方案,将VDR声卡的单卡多插槽结构改为分时多通道并行结构,客观失真度测试及仿真测试显示其合成语音在共振峰和基音周期结构上与原始语音一致,合成语音具有比较好的可懂度.To raise the utilization rate of voyage data recorder (VDR) sound card, reduce redundant operation process and enhance data security of the system, a shipborne VDR sound card was designed based on time-dvision multiplexing (TDM) method and peripheral component interconnect (PCI) bus multi-channel data transmission technology for audio digital signal processing. The design adopts DSPC54 and AMBE-3000 bus connection mode, having the characteristics of high-speed parallel data signal processing (DSP) , low bit rate, and full duplex. The system has the merits of real-time multi-channel voice data processing, low complexity, and easy maneuverability. The single-chip multi-slot structure of VDR sound card was changed to time-sharing multi-channel parallel structure. Objective distortion test and simulation tests showed that the synthesized speech is consistent with the original speech in formants and periodic structure of fundamental tone; synthesized speech has better intelligibility.

关 键 词:TDM VDR PCI AMBE 多通道 

分 类 号:TP274[自动化与计算机技术—检测技术与自动化装置]

 

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