公开(公告)号：US07978613B2

公开(公告)日：2011-07-12

申请号：US10275475

申请日：2001-05-10

申请人： Philip Gray ,  Michael P Hollier ,  Richard JB Reynolds ,  Antony W Rix

发明人： Philip Gray ,  Michael P Hollier ,  Richard JB Reynolds ,  Antony W Rix

IPC分类号： H04J3/14 ,  H04M3/26 ,  H04B17/00 ,  G10L15/20 ,  G01R31/00

CPC分类号： H04W24/00 ,  H04B17/309 ,  H04M3/2236

摘要： The degree of degradation imposed on signals transmitted over a communications link from a transmitter to a receiver is tested. A predetermined test signal is transmitted using spare capacity detected by a voice activity detector when no speech is to be transmitted over the communications link. The test signal received by the receiver is compared with the reference signal, and a measure of the degradation of signals caused by the communications link is generated therefrom.

摘要翻译： 测试通过从发射机到接收机的通信链路传输的信号的劣化程度。 当通过通信链路不发送语音时，使用由语音活动检测器检测到的备用容量来发送预定的测试信号。 将由接收机接收的测试信号与参考信号进行比较，并从其产生由通信链路引起的信号劣化的量度。

公开(公告)号：US06389111B1

公开(公告)日：2002-05-14

申请号：US09180104

申请日：1998-11-02

申请人： Michael P Hollier ,  Philip J Sheppard ,  Richard J Reynolds ,  Antony W Rix

发明人： Michael P Hollier ,  Philip J Sheppard ,  Richard J Reynolds ,  Antony W Rix

IPC分类号： H04M124

CPC分类号： H04M3/2236 ,  H04M3/323 ,  H04M2201/40

摘要： A test stimulus includes two signals RR, S. Signal S is transmitted to a customer equipment interface and over a system under test to a complementary remote apparatus. The test apparatus has two inputs processed by a number of functional elements. The first input is the reference signal RR. The other input is a corresponding test signal R′ generated at remote test apparatus as a test signal R, identical with reference signal RR, and transmitted over the system under test via the customer interface. These two versions of the same test signal are compared. Firstly, the signals RR, R′ are processed by a psycho-acoustic model, the output of which is transmitted to a perceptual layer, and then to a conversion unit which also receives a further input from a non-optimum loudness rating unit. The output from the conversion unit is transmitted to a signal quality determination unit, which also receives an input from the customer equipment interface. The non-optimum loudness rating unit processes inputs from the customer equipment interface and signal generator. During an iterative process, the signal generator receives feedback control from the signal quality determination unit. The remote test apparatus similarly receives a modified version of signal S (viz S′) from the network and compares it with a locally-generated reference version SR. In an alternative arrangement the same test apparatus is connected to both test points of the network and processes both signals S and R, either serially or in parallel.

摘要翻译： 测试刺激包括两个信号RR，S。信号S被发送到客户设备接口并且被测试的系统传输到互补的远程设备。 测试装置具有由多个功能元件处理的两个输入。 第一个输入是参考信号RR。 另一个输入是在远程测试设备处产生的相应的测试信号R'作为测试信号R，与参考信号RR相同，并通过用户接口在待测系统上传输。 将这两个版本的相同测试信号进行比较。 首先，信号RR，R'由心理声学模型进行处理，该心理声学模型的输出被发送到知觉层，然后转换为还从非最佳响度评估单元接收另外的输入的转换单元。 来自转换单元的输出被发送到信号质量确定单元，该信号质量确定单元还从客户设备接口接收输入。 非最佳响度评估单元处理来自客户设备接口和信号发生器的输入。 在迭代处理期间，信号发生器从信号质量确定单元接收反馈控制。 远程测试装置类似地从网络接收信号S（v S'）的修改版本，并将其与本地生成的参考版本SR进行比较。 在替代布置中，相同的测试装置连接到网络的两个测试点，并且串行或并行地处理信号S和R。

公开(公告)号：US5940792A

公开(公告)日：1999-08-17

申请号：US765697

申请日：1997-01-13

申请人： Michael P. Hollier

发明人： Michael P. Hollier

IPC分类号： G10L25/69 ,  H04B3/46 ,  H04M3/22

CPC分类号： G10L25/69 ,  H04B3/46 ,  H04M3/22 ,  H04M3/2236 ,  H04M2201/40

摘要： A method of analysis of characteristics of a telecommunications network measures properties of speech carried by a line under test and includes the steps of identifying a part of the speech signal which has a property independent of the talker, and detecting deviations from that property in the received signal, thereby identifying characteristics of the signal imposed by the system. The properties identified may be characteristic waveforms of speech phonemes, in which the fact that the human voice is only capable of making certain sounds is used to determine what deviations from those sounds have been imposed by the system. In an alternative arrangement identifying a part of the speech signal having a property which varies in a predetermined manner in relation to an absolute characteristic of the talker, and deriving the absolute characteristics therefrom. The absolute characteristic may be the absolute level of the voice, and the other property may be a talker-independent function of the absolute level, such as the spectral content of the unvoiced fricatives in the speech.

摘要翻译： PCT No.PCT / GB95 / 01951 Sec。 371日期1997年1月13日 102（e）日期1997年1月13日PCT 1995年8月17日PCT PCT。 公开号WO96 / 06495 日期1996年2月29日电信网络特征分析方法测量被测线路携带的语音特性，包括识别具有独立于讲话者的性质的语音信号的一部分的步骤， 接收到的信号中的属性，从而识别系统施加的信号的特性。 识别的属性可以是语音音素的特征波形，其中人类声音仅能够产生某些声音的事实被用于确定系统已经施加了与那些声音的偏差。 在一种替代方案中，识别语音信号的一部分具有相对于说话者的绝对特性以预定方式变化的特性，并从其导出绝对特性。 绝对特征可以是声音的绝对水平，另一属性可以是绝对水平的与讲话人无关的功能，例如讲话中的清音摩擦的频谱含量。

公开(公告)号：US08682650B2

公开(公告)日：2014-03-25

申请号：US11321045

申请日：2005-12-30

申请人： Philip Gray ,  Michael P Hollier

发明人： Philip Gray ,  Michael P Hollier

IPC分类号： G10L25/00 ,  G10L25/30 ,  G10L25/75

CPC分类号： G10L25/69

摘要： Non-intrusive speech-quality assessment uses vocal-tract models, in particular for testing telecommunications systems and equipment. This process requires reduction of the speech stream under assessment into a set of parameters that are sensitive to the types of distortion to be assessed. Once parameterized, the data is used to generate a set of physiologically-based rules for error identification, using a parametric modeling of the shape of the vocal tract itself, by comparison between derived parameters and the output of models of physiologically realistic forms for the vocal tract, and the application of physical constraints on how these can change over time.

摘要翻译： 非侵入式语音质量评估使用声道模型，特别是用于测试电信系统和设备。 该过程需要将评估中的语音流减少为对待评估的失真类型敏感的一组参数。 一旦参数化，数据就被用于生成一组基于生理学的错误识别规则，使用对声道本身形状的参数化建模，通过派生参数与生理现实形式的声音模型的输出之间的比较 以及对这些随时间变化的物理限制的应用。

公开(公告)号：US07715592B1

公开(公告)日：2010-05-11

申请号：US09889041

申请日：2000-01-24

申请人： Michael P. Hollier ,  Alexandre Bourret

发明人： Michael P. Hollier ,  Alexandre Bourret

IPC分类号： G06K9/00

CPC分类号： H04N17/00 ,  H04N17/004

摘要： Two video signals, typically an original signal and a degraded version of the same signal, are analyzed firstly to identify perceptually relevant boundaries of elements forming video images depicted therein. These boundaries are then compared to determine the extent to which the properties of the boundaries defined in one image are preserved in the other, to generate an output indicative of the perceptual difference between the first and second signals. The boundaries may be defined by edges, color, luminance or texture contrasts, disparities between frames in a moving or stereoscopic image, or other means. The presence, absence, difference in clarity or difference in means of definition of the boundaries is indicative of the perceptual importance of the differences between the signals, and therefore of the extent to which any degradation of the signal will be perceived by the human viewer of the resulting degraded image. The results may also be weighted according to the perceptual importance of the image depicted—for example the features which identify a human face, and in particular those responsible for visual speech cues.

摘要翻译： 首先分析两个视频信号，通常是相同信号的原始信号和劣化版本，以识别形成其中描绘的视频图像的元素的感知相关边界。 然后比较这些边界以确定在一个图像中定义的边界的属性在另一个图像中被保留的程度，以产生指示第一和第二信号之间感知差的输出。 边界可以由边缘，颜色，亮度或纹理对比度，移动或立体图像中的帧之间的差异或其他方式来定义。 边界的定义方式的存在，不存在，明确性差异或差异表示信号之间的差异的感知重要性，并且因此指示信号的任何退化将被人的观察者 造成的退化图像。 结果还可以根据所描绘的图像的感知重要性加权，例如识别人脸的特征，特别是负责视觉语音提示的特征。

公开(公告)号：US07050924B2

公开(公告)日：2006-05-23

申请号：US10276711

申请日：2001-05-25

申请人： Antony W Rix ,  Philip Gray ,  Richard J B Reynolds ,  Michael P Hollier

发明人： Antony W Rix ,  Philip Gray ,  Richard J B Reynolds ,  Michael P Hollier

IPC分类号： H04B17/00

CPC分类号： H04W24/00 ,  H04M3/22

摘要： The perceptibility of degradations caused to signals transmitted over a transmission medium is measured by generating one or more predetermined transmission degradation conditions (et) and subjecting a test signal (St) to the transmission degradation conditions (et) in a network simulation device. The degree M(e) to which the or each transmission degradation condition (et) is perceptible to the human perceptual system is measured and a data set is generated and stored for converting one or more transmission degradation conditions (et) to respective values of perceptibility M(e). The data set may be a look-up table or an empirically determined formula. The data set may then be used on live traffic (S′), by identifying objectively measured transmission degradation conditions (e) in the received signal (S′) and retrieving from the data set in the data storage means (7) a value of perceptibility (M) associated with the transmission degradation conditions (e) so identified. In this way a measure of the subjective significance of degradation in the signal (S′) can be derived from objective measures of degradation.

摘要翻译： 通过产生一个或多个预定的传输劣化条件（e> t）并对测试信号（S SUB）进行测量，来测量对通过传输介质传输的信号造成的劣化的可感知性， 到网络仿真设备中的传输劣化条件（e> t）。 测量对人感知系统感知到或每个传输劣化条件（e t）的程度M（e），并且生成并存储用于转换一个或多个传输劣化条件的数据集 （e /）相应的感知度值M（e）。 数据集可以是查找表或经验确定的公式。 然后可以通过在接收到的信号（S'）中识别客观测量的传输劣化条件（e）并且从数据存储装置（7）中的数据集中检索数据集，从而可以在实时业务（S'）上使用数据集 与所识别的传输降解条件（e）相关的感知度（M）。 以这种方式，信号（S'）退化的主观意义的度量可以从客观的降解测量得出。

公开(公告)号：US6119083A

公开(公告)日：2000-09-12

申请号：US43410

申请日：1998-03-19

申请人： Michael P Hollier ,  Philip Gray

发明人： Michael P Hollier ,  Philip Gray

IPC分类号： G10L19/018 ,  G10L25/30 ,  G10L25/69 ,  H04M3/22 ,  G01L15/06

CPC分类号： G10L25/69 ,  G10L19/018 ,  H04M3/22 ,  H04M3/2236 ,  G10L25/30 ,  H04M2201/40

摘要： Training apparatus and method for establishing the network definition function of a trainable processing apparatus for analyzing a signal, includes providing a training sequence having a first signal and a distorted version of the first signal, receiving the training sequence and generating a distortion perception measure for indicating the extent to which the distortion would be perceptible to a human observer, and applying the distortion perception measure to the trainable processing apparatus to determine the network definition function.

摘要翻译： PCT No.PCT / GB97 / 00265 Sec。 371日期：1998年3月19日 102（e）1998年3月19日PCT 1997年1月30日PCT PCT。 出版物WO97 / 32428 日期1997年9月4日用于建立用于分析信号的可训练处理装置的网络定义功能的训练装置和方法包括提供具有第一信号和第一信号的失真版本的训练序列，接收训练序列并产生 用于指示失真对人类观察者可感知的程度的失真感知测量，以及将可变性感知测量应用于可训练处理设备以确定网络定义功能。

公开(公告)号：US07567548B2

公开(公告)日：2009-07-28

申请号：US10297495

申请日：2001-06-26

申请人： Richard J B Reynolds ,  Philip Gray ,  Michael P Hollier ,  Antony W Rix

发明人： Richard J B Reynolds ,  Philip Gray ,  Michael P Hollier ,  Antony W Rix

IPC分类号： H04L12/66 ,  H04M11/00 ,  H04B15/00

CPC分类号： H04L65/80 ,  H04L29/06027 ,  H04M7/006

摘要： The perceptual quality of voice signals used for Voice over IP (VoIP) systems is assessed. The content of the voice data packets may be altered in order to increase the perceived quality of the VoIP system.

摘要翻译： 评估用于IP语音（VoIP）系统的语音信号的感知质量。 可以改变语音数据分组的内容以增加VoIP系统的感知质量。

公开(公告)号：US07058713B2

公开(公告)日：2006-06-06

申请号：US10311240

申请日：2001-07-02

申请人： Richard J B Reynolds ,  Philip Gray ,  Michael P Hollier ,  Antony W Rix

发明人： Richard J B Reynolds ,  Philip Gray ,  Michael P Hollier ,  Antony W Rix

IPC分类号： G06F15/173

CPC分类号： H04L65/80 ,  H04L29/06027 ,  H04M3/2227 ,  H04M3/2236 ,  H04M7/003 ,  H04M7/0057

摘要： The present invention provides a test method which can determine whether a user terminal is capable of supporting a real time connection, such as a computer telephony link, with a network terminal while simultaneously supporting a connection with a WWW server.

摘要翻译： 本发明提供了一种测试方法，其可以确定用户终端是否能够与网络终端一起支持诸如计算机电话链路的实时连接，同时支持与WWW服务器的连接。

公开(公告)号：US07015947B1

公开(公告)日：2006-03-21

申请号：US09701514

申请日：1999-06-15

申请人： Michael P. Hollier

发明人： Michael P. Hollier

IPC分类号： H04N17/00

CPC分类号： H04N17/00

摘要： The subjective quality of an audio-visual stimulus is measured by measuring the actual synchronisation errors between the audio and visual elements of the stimulus, identifying characteristics of audio and visual cues in the stimulus, and generating a measure of subjective quality from said errors and characteristics. The nature of the cue has an effect on the perceptual significance of a given value of synchronisation error, and this can be used to relax tolerances to such errors when appropriate, or to provide an accurate measure of the quality of the signal as it would be perceived by a human subject.

摘要翻译： 通过测量刺激的音频和视觉元素之间的实际同步误差来确定视听刺激的主观质量，识别刺激中音频和视觉提示的特征，以及从所述误差和特征产生主观质量的量度 。 提示的性质对同步误差的给定值的感知意义有影响，并且这可以用于在适当时放宽对这种误差的容限，或者提供对信号的质量的精确测量，因为它将 被人类主体感知。