公开(公告)号：US06718296B1

公开(公告)日：2004-04-06

申请号：US09786885

申请日：2001-03-09

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

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

IPC分类号： G10L1900

CPC分类号： H04M3/2236

摘要： Apparatus for assessing the performance of telecommunications systems by comparison of a reference signal with the same signal as degraded by the system under test tends to give unreliable results when used to test connectionless packet-switching equipment. This is because variable delay in delivery of the individual packets can result in the test signal and reference signal becoming unsynchronised. This may lead to the apparatus recording a poorer performance than a human tester would have recorded. To overcome this problem, the invention separates the test signal into a series of individual sections, which are synchgronised and analysed separately, and a quality value, aggregated over all the sections, is derived.

摘要翻译： 通过比较参考信号与被被测系统劣化的相同信号来评估电信系统的性能的装置在用于测试无连接分组交换设备时趋于给出不可靠的结果。 这是因为单个分组的传送中的可变延迟可导致测试信号和参考信号变得不同步。 这可能导致设备记录比人类测试人员记录的更差的性能。 为了克服这个问题，本发明将测试信号分成一系列单独的部分，这些部分被同步化并分开分析，得出了在所有部分上聚集的质量值。

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：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：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：US06304634B1

公开(公告)日：2001-10-16

申请号：US09180094

申请日：1998-11-02

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

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

IPC分类号： H04M124

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

摘要： A communications system is tested to simulate a realistic conversation. A first measurement device make a call, through the system it is testing, to a second measurement device and the two devices converse using predetermined speech generated dynamically by each device in response to the signals received from the other, to simulate aspects of conversation over non-perfect communications system link. The progress of the conversation will therefore take different courses according to the quality of the link. For example, if an expected signal is detected by one device, it transmits an appropriate predetermined response to the other device. However, if the expected signal is corrupted, or not received at all, different predetermined responses (or no response at all) are transmitted to the other device. This in turn may cause the other device to repeat the original signal. Because all the responses, including those to poor quality signals, are predetermined, each device can readily determine the quality of the signals received, because each signal received by one device form the other must be one of a limited number of possible responses to the last transmission made by the one device to the other. The devices perform measurements on the sounds they receive from each other, and monitor the progress of the conversation to compute parameters describing aspects of the received signal quality.

摘要翻译： 测试通信系统以模拟现实的对话。 第一测量装置通过其正在测试的系统通过第二测量装置进行呼叫，并且两个装置使用响应于从另一个接收到的信号动态地由每个装置生成的预定语音进行反转，以模拟非对等的对话方面 完善的通信系统链路。 因此，会话进度将根据链接的质量而采取不同的课程。 例如，如果一个设备检测到期望的信号，则它向另一个设备发送适当的预定响应。 然而，如果预期信号被破坏或根本没有被接收，则不同的预定响应（或根本没有响应）被发送到另一设备。 这又可能导致其他设备重复原始信号。 由于所有的响应，包括对质量差的信号的响应都是预先确定的，因此每个设备可以容易地确定所接收的信号的质量，因为由一个设备接收的每个信号形成另一个设备必须是对最后一个设备的有限数量的可能响应之一 由一个设备传输到另一个设备。 设备对彼此接收的声音执行测量，并监视会话的进度，以计算描述接收信号质量方面的参数。

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：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：US6035270A

公开(公告)日：2000-03-07

申请号：US270

申请日：1998-02-03

申请人： Michael P Hollier ,  Philip J Sheppard ,  Philip Gray

发明人： Michael P Hollier ,  Philip J Sheppard ,  Philip Gray

IPC分类号： G10L19/018 ,  G10L25/30 ,  G10L25/69 ,  H04B1/66 ,  H04B3/46 ,  H04M3/22 ,  G01L9/18

CPC分类号： G10L25/69 ,  G10L19/018 ,  H04B1/665 ,  H04M3/22 ,  H04M3/2236 ,  G10L25/30 ,  H04M2201/40

摘要： A speech signal is subjected imperfect to vocal tract analysis model and the output therefrom is analyzed by a neural network. The output from the neural network is compared with the parameters stored in the network definition function, to derive measurement of the quality of the speech signal supplied to the source. The network definition function is determined by applying to the trainable processing apparatus a distortion perception measure indicative of the extent to which a distortion would be perceptible to a human listener.

摘要翻译： PCT No.PCT / GB96 / 01821 Sec。 371日期1998年2月3日 102（e）1998年2月3日PCT PCT 1996年7月25日PCT公布。 出版物WO97 / 05730 日期1997年2月13日语音信号对声道分析模型不完整，其输出由神经网络分析。 将来自神经网络的输出与存储在网络定义函数中的参数进行比较，以导出提供给源的语音信号的质量的测量。 网络定义功能通过向可训练处理设备应用指示失真对人类听众可感知的程度的失真感知度量来确定。