By using computer network , distributed multimedia database , speech signal process and computer graphics technologies , this project use non - diving into virtual reality technology to implement virtual radio detection work environment through the simulation of electromagnetic environment , receiver and recorder among radio detection work to make those who take part in training immerse in similar training environment as real detection work and achieve the same training effect as in real detection work 本课题采用计算机网络、分布式多媒体数据库、语音信号处理和计算机图形学等技术，运用“非投入”式虚拟现实技术方法，通过对无线电监测工作中电磁环境、接收机和录音机的仿真，实现了无线电监测人员工作环境的虚拟，从而使参训人员投入到与监测工作实际相近的训练环境、达到与实际监测工作相同的训练效果。
This article uses cpld technology to improve the hardware integration degree so as to ensure the high system reliability ; it applies digital signal process technology to producing and recognizing large volume ditigal voice signals in switch systems ; it replaces the old - used special voice signal process chips , thus lowers the cost , improves the quality ; it uses high quality common pc 104 units to complete the main processor tasks , which greatly improves the signal processing capability in the digital switch systems , and provides a great convinence for future technology upgrade as well ; in system archtecture , we exploit modular design technique on client ports and repeater ports , which gains more reliability and easy maintenance 本文主要采用了cpld技术提高硬件的集成度以保证系统的高可靠性：用数字信号处理技术完成交换系统中大量的语音信号的产生和识别，代替以前的专用语音信号处理芯片，降低了成本，提高了性能：用高性能的通用pc104单元完成主处理机的工作，大大提高了数字交换系统的信息处理能力，并为今后的技术升级提供了方便：在系统结构上对用户端口和中继端口采用模块化设计，性能可靠，维护方便。
The thesis makes researches on technologies of call centers , voice disposing technologies and the synthetic application of these technologies . with setting up a call center which is called epcc ( electric power call center ) in a electric power company , the thesis describes pivotal technologies in call centers , such as voice disposing technologies > , crm ( customer relationship management ) and web technologies , the thesis represents standard schemes and standard frames of call centers , and the thesis describes pivotal technologies in voice disposing procedures , such as speech synthesize and speech recognize , and the thesis describes voice disposing technology " s applications in call centers that are called ivr ( interactive voice response ) systems , then the thesis discusses the acd ( auto call distribution ) program in epcc 本论文通过建立呼叫中心的一个实例(电力呼叫中心) ，对呼叫中心、语音技术及其综合应用进行了较为深入的研究。通过呼叫中心的电力应用，较详细地论述了呼叫中心的关键技术：语音技术、客户关系管理crm和web技术等；较深入地阐述了呼叫中心的典型方案和典型结构；较详细地论述了语音信号处理技术的关键技术：语音合成技术及语音识别技术：深入讨论了语音技术在呼叫中心的具体应用- - - ivr系统及其关键技术；较详细地讨论了电力呼叫中心中所采用的acd算法，并基于acd算法完善了呼叫中心的表现形式。
In contemporary digital times , the research about mandarin digit speech recognition is more and more noticed , since some aspects by digital technique , such as speech intensification , speech transmission , speech recognition , speech synthesis and speech deposit , are the front parts of speech signal processing , of which mandarin digit speech recognition is an important part , and used in many areas 在当今数字化的信息时代，用数字化的技术进行语音的增强、传送、识别、合成、存储已成为语音信号处理技术的学科前沿，汉语数码语音识别是这前沿中重要的部分且用途很广，因此，汉语数码语音识别的研究日益受到重视。本文就是在这种情况下对汉语数码语音识别做了一些研究。
Along with the development of voice ' s digital signal process technic , developers " research interests are attracted by research and practice application of low speed voice ' s encoder and decoder . the paper is completed in this background , it takes several months do it . the paper syncretize dsp ( digital signal processor ) and cpld ( complex programmable logic device ) technic 随着语音信号处理技术的蓬勃发展，低速率语音编解码方面的研究和实际应用正在吸引着开发者的研究兴趣，本论文正是在此背景下，经过数月的努力完成的，这其中包括了各种较新技术领域的融合，应用到高速数字信号处理器dsp技术、大规模可编程逻辑器件cpld的设计应用技术。
It can reduce the bit rate greatly and achieve reconstruction speech with high level quality . based on system analysis , a scheme of telephone gateway interface is presented using tetra system as an example to divide the interface into two parts : interface signal processing and speech signal processing by different functions whose hardware structures are designed by using mcu and tms320vc5410 as cores respectively 在系统分析的基础上,以tetra系统为例,设计了一种电话网关接口的组成结构,将整个接口单元按主要功能分为接口信号处理和语音信号处理两部分,并提出了分别采用以单片机和ti公司的tms320vc5410dsp为核心的硬件单元进行实现的设计方案。
3 . then comes the whole structure and frame of our isolated word recognition system , including speech acoustic analyzing 、 feature extraction 、 acoustic modeling and recognition strategy in hmm , at the end of this chapter we get the result of isolated word recognition system . 3 .从语音信号处理分析出发,在hmm的理论基础上,阐述了本文所研究的孤立词语音识别系统的基本框架和组成部分,包括声学分析、特征提取、孤立词声学建模、训练识别以及最终的孤立词系统识别结果。
The independent component analysis ( ica ) addresses non - gaussian source signals under amusing independent each other , it performs blind separation for multichannel observed signals . it has widely applied in wireless communication , biological signals extraction , audio signals processing , image processing , noise reducing and so on 独立分量分析技术以非高斯源信号为研究对象,在统计独立的假设下,对多路观测到的混合信号进行盲信号分离,已广泛应用于无线通讯、生物信号提取、语音信号处理、图像处理和噪声抑制等领域。
The paper makes great efforts on the software optimization of evrc vocoder . based on the understanding of tms320c64xx cpu structure , we do deeply - optimization on the loop which appear usually in voice signal processing , and this improve the utility ratio of cpu and the parallelity degree of cpu function cell . at the same time , we utilize the bit - exact test to test the fixed - point evrc vocoder with the test vectors of tia / eia / is - 718 , which improve the robustness of the vocoder 本文围绕定点evrc声码器的软件优化，做了大量的工作，在充分理解tms320c64xxcpu结构的基础上，针对语音信号处理中大量出现的循环运算进行了深度优化，大大提高了cpu的利用率以及cpu功能单元的并行程度，同时，我们还用tia / eia / is - 718的测试向量对定点evrc声码器进行了严格比特对准测试，提高了声码器的鲁棒性。
