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    Testing telecommunications equipment
    1.
    发明授权
    Testing telecommunications equipment 有权
    测试电信设备

    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。

    DECODING MEDIA CONTENT AT A WIRELESS RECEIVER
    2.
    发明申请
    DECODING MEDIA CONTENT AT A WIRELESS RECEIVER 有权
    在无线接收器上解码媒体内容

    公开(公告)号：US20090304115A1

    公开(公告)日：2009-12-10

    申请号：US12373382

    申请日：2007-06-26

    申请人： Richard E. Pittaway ,  Antony W. Rix ,  Philip Michaelson-Yeates

    发明人： Richard E. Pittaway ,  Antony W. Rix ,  Philip Michaelson-Yeates

    IPC分类号： H04L27/06

    CPC分类号： H04N21/835 ,  H04H60/14 ,  H04H60/40 ,  H04H60/91 ,  H04N7/17318 ,  H04N21/2541 ,  H04N21/41407 ,  H04N21/4627 ,  H04N21/47202 ,  H04N21/6112 ,  H04N21/6181 ,  H04N21/63775 ,  H04N21/8355

    摘要： A wireless receiver (17), in the form of a mobile telephone, comprises a DAB receiver (31) and a GSM/GPRS transceiver (29) which enables bi-directional point-to-point data communications via a service provider (55). The DAB receiver (31) is arranged to receive media data from an over-the-air broadcast channel, the media data primarily representing television and radio streams. In order that the streams can be decoded and decrypted by media playing software (47) on the wireless receiver (17), a provisioning operation is employed to provide NSC header files and DRM licences to users in response to them making content requests. The header files and licenses are sent over a separate data channel and in advance of the broadcast content.

    摘要翻译： 移动电话形式的无线接收器（17）包括DAB接收器（31）和GSM / GPRS收发器（29），其能够经由服务提供商（55）进行双向点对点数据通信， 。 DAB接收器（31）被布置成从空中广播信道接收媒体数据，媒体数据主要表示电视和无线电流。 为了使流可以由无线接收器（17）上的媒体播放软件（47）解码和解密，采用供应操作来向用户提供NSC头文件和DRM许可证，以响应于它们进行内容请求。 头文件和许可证通过单独的数据信道发送，并在广播内容之前发送。

    Test signalling
    3.
    发明授权
    Test signalling 有权
    测试信号

    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。

    Test signalling
    6.
    发明授权
    Test signalling 有权
    测试信号

    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。

    Measurement of signal quality
    7.
    发明授权
    Measurement of signal quality 有权
    信号质量测量

    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。