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动态时间规正(Dynamic Time Warping)是语音识别中的一种经典算法,算法简单有效,因此在实现孤立词识别系统中获得了广泛的应用。提出一种DTW的改进算法,采用两次在时间域上的规正,使计算程序简洁规范,计算量减少。经实验验证,改进DTW算法在不降低识别率的前提下,提高了识别速度,提高了系统的实用性。 相似文献
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动态时间规整(Dynamic Time Warping)是语音识别中的一种经典算法,该算法简单有效,在实现孤立词识别系统中得到了广泛的应用。为了提高机器人语音识别系统的识别率和识别速度,文中采用了一种改进的DTW语音识别算法。在MATLAB 7.0环境下,对改进的语音端点检测和改进的DTW算法进行仿真实验,实验证明改进的算法提高了识别率,并且减少了识别所用的时间;将该算法移植到机器人上,在安静的环境下进行试验,结果表明机器人能准确而又快速地识别语音内容。最后,得到了改进的语音识别算法能够有效提高识别率和识别速度的结论。 相似文献
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动态时间规整(Dynamic Time Warping)是语音识别中的一种经典算法,该算法简单有效,在实现孤立词识别系统中得到了广泛的应用.为了提高机器人语音识别系统的识别率和识别速度,文中采用了一种改进的DTW语音识别算法.在MATLAB 7.0环境下,对改进的语音端点检测和改进的DTW算法进行仿真实验,实验证明改进的算法提高了识别率,并且减少了识别所用的时间;将该算法移植到机器人上,在安静的环境下进行试验,结果表明机器人能准确而又快速地识别语音内容.最后,得到了改进的语音识别算法能够有效提高识别率和识别速度的结论. 相似文献
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为研究飞机牵引车智能语音控制,实现机场环境下牵引车对飞行员语音命令的精确、高效识别,同时针对传统动态时间规整(DTW)算法计算量大、时间复杂度高、算法识别效率低的问题,提出了一种车辆语音识别的六边形弯曲窗口约束DTW优化算法。首先,从DTW算法原理、牵引车指令的语音特性和机场环境三方面,分析了弯曲窗口对DTW算法识别精度、效率的影响;然后,在Itakura Parallelogram菱形弯曲窗口约束DTW优化算法的基础上,进一步提出了六边形弯曲窗口约束的DTW全局优化算法;最后,通过改变优化系数,实现了最优六边形弯曲窗口约束的DTW算法方案。基于孤立词识别的实验结果表明,所提最优算法与传统DTW算法、菱形弯曲窗口约束的DTW算法相比,识别错误率分别降低77.14%和69.27%,识别效率分别提高48.92%和27.90%。该最优算法更具鲁棒性、时效性,可以作为飞机牵引车智能控制的理想指令输入端口。 相似文献
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嵌入式语音识别系统中的DTW在线并行算法* 总被引:2,自引:0,他引:2
为提高语音识别系统的实时性,利用动态规划和并行计算思想,提出一种适用于嵌入式语音识别系统的DTW(动态时间规整)在线并行算法。通过分析标准DTW及其主要衍生算法,对DTW算法的数据结构进行改进以满足在线算法要求,在寻找最佳路径过程中动态连续地分配和释放内存或预先分配固定大小的内存,并将多个关键词的DTW计算分布到多个运算单元;最后汇总各运算单元的结果得到识别结果。实验表明,该算法比经典DTW降低了内存使用和识别时间,并使语音识别的实时系数达到1.17,具有较高的实时性。 相似文献
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申丽敏 《计算机光盘软件与应用》2015,(2):70-72
随着中西方交流日益频繁,语言的沟通就显得尤为重要。本文通过对中英语音翻译系统的三个模块"汉语语音识别模块、汉-英机器翻译模块和汉、英语语音合成模块"的分析,构建了语音翻译信号数字模型,同时通过语音识别的基本原理,提出了一种改进的语音识别DTW算法。通过仿真和实验证明了改进的语音识别DTW算法是可行的。 相似文献
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通过对DTW算法的研究,提出了一种并行分段裁剪的新方法,在减少DTW算法运算量方面有显著效果,并将其用于一个地名识别系统中,经测试,可以明显缩短识别时间,具有很强的实时性,有较高的识别率,适合作为小型语音识别产品的主要算法。 相似文献
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S. Shaw 《Journal of Computer Assisted Learning》1993,9(2):93-99
Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained. 相似文献
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European Community policy and the market 总被引:1,自引:0,他引:1
C. Lloyd 《Journal of Computer Assisted Learning》1993,9(2):86-91
Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven. 相似文献
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融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。 相似文献
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Wayne O’Brien Author Vitae 《Journal of Systems and Software》2008,81(11):1997-2013
Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them. 相似文献
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This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives. 相似文献
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Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what
is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic
sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and
its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of
an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify
robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can
or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest.
This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January
31–February 2, 2008 相似文献
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David Poole 《Computational Intelligence》1989,5(2):97-110
Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given. 相似文献
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Watts S. Humphrey 《Annals of Software Engineering》2002,14(1-4):39-72
This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)SM and Team Software Process (TSP){SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical. 相似文献
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基于复小波噪声方差显著修正的SAR图像去噪 总被引:4,自引:1,他引:3
提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。 相似文献