Speech recognition technology applied to intelligent mobile navigation system

The capability of human-computer interaction reflects the intelligent degree of mobile navigation system. The navigation data and functions of mobile navigation system are divided into system commands and non-system commands in this paper. And then a group of speech commands are abstracted. This paper applies speech recognition technology to intelligent mobile navigation system to process speech commands and does some deep research on the integration of speech recognition technology with mobile navigation system. The navigation operation can be performed by speech commands, which makes human-computer interaction easy during navigation. Speech command interface of navigation system is implemented by Dutty ++ Software, which is based on speech recognition system-Via Voice of IBM. Through navigation experiments, navigation can be done almost without keyboard, which proved that human-computer interaction is very convenient by speech commands and the reliability is also higher.     

改进的基于小波变换的语音活动检测算法

提出了一种改进的基于小波变换的语音活动检测算法。这种新算法能够在不同的时间和尺度上计算用于语音活动检测的参数,根据这些参数得到稳健的语音活动决策。实验表明,新算法与ITUG.729附录B相比,能够更准确地检测到语音活动,语音活动剪切率大为减少;同时新算法对于不同类型的背景噪声,即使全局信噪比在10dB以下也具有较好的性能。     

多类支持向量机在语音识别中的应用

针对语音模式识别,引入多类（M-ary）支持向量机来进行分类。并详细的介绍了M-ary支持向量机的概念以及语音识别系统中的实现方式。通过仿真实验,与BP神经网络、SVM进行比较,验证了M-ary支持向量机具有识别率高,抗噪能力强等优越性。     

Speech Recognition Technology Applied to Intelligent Mobile Navigation System

The capability of humancomputer interaction reflects the intelligent degree of mobile navigation system.The navigation data and functions of mobile navigation system are divided into system commands and non-system commands in this paper,And then a group of speech commands are abstracted.This paper applies speech recognition technology to intelligent mobile navigation system to process speech commands and does some deep research on the integration of speech recognition technology with mobile navigation system.The navigation operation can be performed by speech commands,which makes humancomputer interaction easy during navigation.Speech command interface of navigation system is implemented by Dutty Software,which is based on speech recognition system-Via Voice of IBM.Through navigation experiments,navigation can be done almost without keyboard,which proved that human-computer interaction is very convenient by speech commands and the reliability is also higher.     

基于共轭结构ACELP语音编码算法的优化及DSP实时实现

使用高质量、高压缩率的语音编解码器,可以在保证通话质量的前提下有效地提高通信系统的容量。这里首先介绍了基于共轭结构ACELP语音编解码算法,并针对该算法特点提出算法优化方法,如固定码本搜索优化,开环基音分析优化,运算移位溢出检查处理等;然后给出在TI公司16位定点DSP芯片TMS320VC549上实时实现该优化后算法的方案和过程,分析了编解码语音的质量和算法的性能,最后得出实时实现的结果。实验结果表明,优化后的CS-ACELP语音编码算法在定点DSP上的实时实现,能得到良好的语音音质,所用的资源和功耗极低。     

基于主位理论的英语演讲语篇分析

从系统功能语法的角度,采用定性与定量相结合的分析方法,以4篇英语演讲语篇为例,对其主位结构、标记性及其推进模式进行统计和对比,进而描述并探求英语演讲语篇的结构特征和共性。     

外业调绘平台的语音驱动技术

测绘技术的迅猛发展使得基于纸质的外业调绘方式渐渐地被数字化调绘方式所代替。针对外业人员在野外环境下使用调绘平台存在人机交互效率下降、认知负担加重的问题,该文提出将语音识别技术引入到外业调绘平台中,通过人类语音来驱动各种外业调绘命令。在研究了语音识别、语义理解等语音技术的基础上,详细阐述了语音驱动实现的关键技术。实践结果表明,利用语音方式辅助外业调绘,能有效地代替触控笔、虚拟键盘等人机交互方式,提高外业工作效率。     

"校园一卡通"系统中呼叫中心的设计与实现

呼叫中心(Call Center)系统是综合利用先进的通信及计算机技术,对信息和物资的流程进行优化处理和管理,集中实现沟通、服务和生产指挥的系统。详细介绍了小型呼叫中心系统的实现及在校园一卡通系统中的应用。本系统结合实际需求,采用板卡实现方案,有效地提高了系统的性能价格比,解决了呼叫中心在客户服务系统应用中所涉及的相关问题。     

视频会议中音频多点处理器的研究

H.323视频会议系统中的多点处理单元(MCU)能在多点会议中提供音频、视频或数据流的集中处理。针对音频信息的处理需求,提出了一种实用的混音处理策略,它具有计算复杂度低、会议重点突出的特点,并且一般情况下不会发生溢出问题。     

崂山影剧院音质改善的声学设计

利用混响时间及其频率特性实测值,通过分析计算,在一些建筑条件限制下,采用恰当地声学处理措施,调整了混响时间及其频率特性,提出一种简便有效的方法。