共查询到18条相似文献,搜索用时 187 毫秒
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针对汉语连续语音,本文提出了采用径向基函数神经网络(RBFNNs),对基于输出的语音质量进行客观评价的一种新方法——RBFOBSQ(Output-Based Speech Quality Using RBFNNs).该方法采用Mel倒谱对语音系统输出端的待测语音信号进行特征参数提取,然后通过RBF神经网络完成特征参数到主观评价MOS分的非线性映射,其映射值即为仅依赖于输出的客观音质评价结果,其与主观评价MOS分的相关度,当采用训练集样本时达到0.92以上,而采用测试集样本时达到0.88以上. 相似文献
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广播节目声音质量的评价方法有客观和主观两种.客观测试可借鉴的方法较多,但主观测试可借鉴的不多,因此本文在论述广播节目主观音质评价的重要性和必要性之后,主要阐述如何更科学、有效并具有可操作性的主观测试方法,分析了影响音频节目主观感受的主要因素,并探讨了改善和保持广播节目高质量音质的工作措施. 相似文献
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提出了基于MVDR谱的语音通信干扰效果客观评估方法,并在通信电台连续波辐照试验中进行了验证。试验结果表明:该方法较好地反映了人耳听觉特性,与主观音质评价相一致,是一种较好的可以应用于语音通信干扰效果评估的客观方法。 相似文献
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对小波变换原理进行简要分析的基础上,对小波变换与小波美倒谱(MFCC)方法相结合进行语音客观音质评价的方法进行了研究,给出了小波美倒谱语音音质评估原理及计算流程。使用MFCC方法和小波美倒谱算法分别计算原始语音文件与受扰语音文件的失真距离,并将失真距离与主观评测结果进行相关分析,得出相应算法的相关系数和方差值,通过对比表明小波美倒谱语音评估方法对于以倒谱域参数为基础的客观评价方法有很大改善。 相似文献
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广播电视作品声音质量的评价方法有客观和主观两种。本文论述了主观音质评价方法的重要性,讨论了有关的问题,并就音质评价术语与客观电声指标之间的关系作简单的说明 相似文献
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对扬声器主观音质进行客观音频质量感知评价 总被引:1,自引:0,他引:1
扬声器声音质量评价方法分为主客观两类,但目前二者的相关度不高。国际电信联盟提出了音频质量感知评估方法(PEAQ).模拟人耳感知特性并融合多个输出变量产生一个评价参数。不同于现有的常规客观音质测量方法.探讨了采用PEAQ对扬声器主观音质进行客观测量的可行性。以消声室录制扬声器的放音片段作为测试信号,分别对4组扬声器进行PEAQ及主观听音评价,实验结果显示PEAQ评价和主观听音评价有较好的相关性。 相似文献
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笔者曾就家庭影院声学设计的客观评价为大家进行了深入浅出的分析,并辅以测试设备及声学测试步骤的简介,基本上把室内声场的客观评价方法教给了大家。但是,这只是评价家庭影院声音音质的一个方面。本章,笔者将从专业的声学角度来为大家解析家庭影院中声音主观评价的标准,教大家如何用"耳朵"来"说话"。对声音的评价主要可分为两类:一类是客观评价。客观评价是指使用测试仪器进行测试得到的结果。这种测试方法严格,仪器昂贵,数据较为准确,具有很高的参考价值。但这种结果不容易理解,还可能与真实的聆听感受略有区别。另一类就是主观评价。所谓的主观评价是相对于客观评价而言的,并非主观随意描述。主观评价是通过主观感受对实际声音进行评价。进行主观评 相似文献
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基于听觉模型的客观音质评价方法研究 总被引:10,自引:1,他引:10
本文阐述了一种基于听觉模型的客观音质评价方法研究,我们在使用谱失真和谱包络失真进行了客观音质评价同时采用了听觉系统模拟的三个听觉感知模型,实验结果表明,在于听觉模型的谱夫真方法测量结果与主观评价更人一致性,在与主观评价具有同样相关系数时,采用听觉模型谱包失真方法的预测系数为4阶而LPC倒谱距离方法的预测系数为8阶。 相似文献
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将小波变换用于子带分解,对纯净语音信号和受扰语音信号进行特征提取,包括质心、子带能量和带宽等,并进一步与一致性函数(COH)方法相结合对语音客观音质评价方法进行了研究,即Wavelet-COH方法。通过最小二乘多项式拟合模型,对Wavelet-COH方法得到的客观评测和主观评测结果进行相关分析,得出相应算法的相关系数和方差值。通过对比,表明Wavelet-COH语音评估方法比传统的COH客观评价方法有很大改善。 相似文献
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The concept of speech quality assessment is examined. Quality assessment methodologies for speech waveform coding, source coding, and speech synthesis by rule from the viewpoints of naturalness and intelligibility are reviewed. Both subjective and objective measures are considered 相似文献
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Sandeep Kumar 《ETRI Journal》2016,38(3):425-434
A novel average magnitude difference function (AMDF)‐based pitch detection scheme (PDS) is proposed to achieve better performance in speech quality. A performance evaluation of the proposed PDS is carried out through both a simulation and a real‐time implementation of a speech analysis‐synthesis system. The parameters used to compare the performance of the proposed PDS with that of PDSs that are based on either a cepstrum, an autocorrelation function (ACF), an AMDF, or circular AMDF (CAMDF) methods are as follows: percentage gross pitch error (%GPE); a subjective listening test; an objective speech quality assessment; a speech intelligibility test; a synthesized speech waveform; computation time; and memory consumption. The proposed PDS results in lower %GPE and better synthesized speech quality and intelligibility for different speech signals as compared to the cepstrum‐, ACF‐, AMDF‐, and CAMDF‐based PDSs. The computational time of the proposed PDS is also less than that for the cepstrum‐, ACF‐, and CAMDF‐based PDSs. Moreover, the total memory consumed by the proposed PDS is less than that for the ACF‐ and cepstrum‐based PDSs. 相似文献
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A perceptually motivated objective measure for evaluating speech quality is presented. The measure, computed from the original and coded versions of an utterance, exhibits statistically a monotonic relationship with the mean opinion score, a widely used criterion for speech coder assessment. For each 10-ms segment of an utterance, a weighted spectral vector is computed via 15 critical band filters for telephone bandwidth speech. The overall distortion, called Bark spectral distortion (BSD), is the average squared Euclidean distance between spectral vectors of the original and coded utterances. The BSD takes into account auditory frequency warping, critical band integration, amplitude sensitivity variations with frequency, and subjective loudness 相似文献
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AVS音频编解码性能分析 总被引:1,自引:0,他引:1
为了对AVS标准音频部分的编解码质量有一个客观评价,2005年8月,AVS标准工作组组织会员单位对AVS音频和LAME MP3进行了内部主观测试,测试结果表明:AVS音频强于LAME MP3;2005年底,AVS音频技术和EVD的ExAC音频技术进行了融合,为了验证融合的效果,又进行了一次主观测试,测试结果表明,融合后的AVS音频编解码质量得到小幅提高。 相似文献
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Kitawaki N. Nagabuchi H. Itoh K. 《Selected Areas in Communications, IEEE Journal on》1988,6(2):242-248
An LPC (linear predictive coding) cepstrum distance measure (CD) is introduced as an objective measure for estimating the subjective quality of speech signals. Good correspondence between LPC CD and the subjective quality, expressed in terms of both opinion equivalent Q and mean opinion score, are shown. Good repeatability of objective quality evaluation using LPC CD is also shown. A method for generating an artificial voice signal that reflects the characteristics of real speech signals is described. The LPC CD values calculated using this artificial voice are almost the same as those calculated using real speech signals. The speaker-dependency of the coded-speech quality is shown to be an important factor in low-bit-rate speech coding. Even taking this factor into consideration, LPC CD is shown to be effective for estimating the subjective quality 相似文献