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The performance of speaker verification systems is often compromised under real-world environments. For example, variations in handset characteristics could cause severe performance degradation. This paper presents a novel method to overcome this problem by using a non-linear handset mapper. Under this method, a mapper is constructed by training an elliptical basis function network using distorted speech features as inputs and the corresponding clean features as the desired outputs. During feature recuperation, clean features are recovered by feeding the distorted features to the feature mapper. The recovered features are then presented to a speaker model as if they were derived from clean speech. Experimental evaluations based on 258 speakers of the TIMIT and NTIMIT corpuses suggest that the feature mappers improve the verification performance remarkably. 相似文献
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语码转换是现代语言交际中的常见语言现象之一，而一定的交际行为总是受一定的动机支配的。笔者从社会语言学及心理语言学的角度出发对语码转换的动机进行了分类分析，以期加深人们对该现象的认识与了解，从而更好地加以利用，为有效交际服务。 相似文献
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论述指向性超低音扬声器阵列的意义和实际应用价值,阐述三种常规超低音扬声器阵列的指向性基本原理,采用专用计算机软件进行模拟仿真,利用实际消声室实验对该基础理论以及计算机仿真结果进行验证及归纳总结;并针对侧墙对Front/Back阵列声辐射的影响进行探究,通过实验得出结论。 相似文献
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在说话人识别中,有效语音数据的选择是一个重要的预处理环节.常用的数据选择方法根据能量信息的强弱对有效数据进行提取,但在实际情况中能量的高低与语音数据并无必然联系.本文在对传统方法进行分析比较的同时引入语言学知识,提出基于辅音信息的有效数据选择方法.该方法通过对活动语音检测结果中音素识别结果进行分析,保留所有元音,对辅音进行筛选,去除无益于说话人识别的干扰辅音音素,从而实现对有效语 音数据的选取.实验表明,应用该方法得到的说话人识别结果,明显优于传统的基于能量的数据选择算法,如基于G.723.1标准的活动语音检测算法和近期提出的基于交叉熵顺序统计滤波的端点检测算法. 相似文献
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Minh Hue Nguyen 《Asia-Pacific Journal of Teacher Education》2017,45(4):399-415
This paper reports on how Maria (pseudonym), a non-native English speaker (NNES) and preservice teacher (PST) of English as an additional language (EAL), developed her professional identity during the practicum in an Australian secondary school. Drawing on activity theory, the study identified contradictions in Maria’s practicum activity and examined how Maria’s professional identity developed through her negotiation of the contradictions. Data included interviews with Maria before, during and after the practicum, her reflections, an interview with her school mentor (Ms Davies, pseudonym), and relevant documents. The findings reveal that Maria experienced contradictions between her multiple identities of NNES, student, becoming teacher, and classroom teacher, between her mentor’s teaching approach and that of her own, and between her practice and rules. The findings provide implications for researching teacher identity and supporting preservice EAL teachers in developing productive teacher identities during the practicum. 相似文献
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文章主要是通过调用ioctl,open,read,write等函数,结合LINUX音频设备文件,实现了对指定音频文件的播放。 相似文献
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This article scrutinises the usage of the words “we”, “us” and “our” by BBC radio journalists when reporting and discussing news and current affairs. By analysing reports and discussions on the “flagship” Radio 4 Today, a daily news programme whose centrality to political and public debate is widely recognised, the article raises substantive questions about clarity, accuracy and impartiality in senior broadcast journalists’ choice of language. In exploring the assumptions which may underlie the invocation, via such language choices, of an implied community, and against the backdrop of the BBC's commitment to impartiality in its Editorial Guidelines, the article identifies numerous recent examples where the choice of words and identifiers can be seen as undermining the BBC's impartiality and which show several of its senior journalists adopting the first-person plural “we” when reporting on matters of public policy. The findings therefore indicate a general need to codify norms which are seen to integrate the need for accuracy as well as impartiality, and for these norms to take into account issues which might at first glance seem to be inconsequential, micro-level features of the journalists’ language. The evidence suggests that more fine-grained guidelines on permissible circumstances for BBC journalists’ usage of “we” and “our” need revising and disseminating in the light of these findings. 相似文献
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李香萍 《实验室研究与探索》2008,27(1):70-73
Matlab作为目前最流行的功能强大的软件,可用于说话人识别。在介绍说话人识别基本概念和原理的基础上,通过一个具体实例,说明如何用matlab的simulink工具箱提取特征参数、通过编程来进行对说话人识别的过程。最后给出了识别结果。 相似文献
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接受美学强调文学欣赏和接受活动中读者的重要性，作为一个双向的交流活动，朗读同样必须关注接受者——受众的具体的期待和需求，这就是朗读中强调的对象感培养。朗读作品不仅要靠优美的声音、恰当的技巧去包装，更要与受众产生内心的交流与呼应。从朗读前的准备到朗读的过程，朗读者始终要把接受者“放在眼里”，“藏在心里”。这样才能真正达到用声传情、以情动人的感染效果。 相似文献