公开(公告)号：US20100150363A1

公开(公告)日：2010-06-17

申请号：US12316695

申请日：2008-12-15

申请人： James H. James ,  Wallace F. Smith, JR.

发明人： James H. James ,  Wallace F. Smith, JR.

IPC分类号： H04B3/20

CPC分类号： H04B3/23 ,  H04B3/493

摘要： The performance of an echo canceller is assessed using a) a test signal launched from originating test equipment and b) a simulated echo of the test signal launched from terminating test equipment. The launch of the simulated echo signal is timed in such a way that it arrives at the tandem echo canceller(s) at a point in time relative to the arrival of the test signal thereat that the tandem echo canceller(s) is (are) not able to cancel the simulated echo signal. The latter thus arrives uncanceled at the target echo canceller. The launch of the simulated echo signal is further timed in such a way that it arrives at the target echo canceller at a point in time relative to the arrival of the test signal thereat that the target echo canceller IS able to cancel the simulated echo signal. As a result, any residual echo received at the originating test equipment is a measure of the performance of the target echo canceller exclusive of the performance of the tandem echo canceller(s).

摘要翻译： 使用以下方式评估回声消除器的性能：a）从原始测试设备发射的测试信号，以及b）从终端测试设备发射的测试信号的模拟回波。 模拟回波信号的发射被定时，使得其在相对于测试信号到达的时间点到达串联回波消除器，其中串联回波消除器是（或） 不能取消模拟回波信号。 因此，后者到达目标回波消除器。 仿真回波信号的发射被进一步定时，使得其在相对于测试信号到达的时间点到达目标回波消除器，目标回波消除器IS能够消除模拟的回波信号。 因此，在始发测试设备处接收到的任何残余回波是除了串联回波消除器的性能之外的目标回波消除器的性能的度量。

公开(公告)号：US08112273B2

公开(公告)日：2012-02-07

申请号：US12647863

申请日：2009-12-28

申请人： James H. James ,  Joshua Hal Rosenbluth

发明人： James H. James ,  Joshua Hal Rosenbluth

IPC分类号： G10L15/20

CPC分类号： G10L19/167 ,  G10L19/012 ,  G10L25/78 ,  H04J3/17 ,  H04L65/1059 ,  H04L65/80

摘要： The present invention is a system and method that improves upon voice activity detection by packetizing actual noise signals, typically background noise. In accordance with the present invention an access network receives an input voice signal (including noise) and converts the input voice signal into a packetized voice signal. The packetized voice signal is transmitted via a network to an egress network. The egress network receives the packetized voice signal, converts the packetized voice signal into an output voice signal, and outputs the output voice signal. The egress network also extracts and stores noise packets from the received packetized voice signal and converts the packetized noise signal into an output noise signal. When the access network ceases to receive the input voice signal while the call is still ongoing, the access network instructs the egress network to continually output the output noise signal.

摘要翻译： 本发明是一种系统和方法，其通过打包实际的噪声信号（通常是背景噪声）来改善语音活动检测。 根据本发明，接入网接收输入语音信号（包括噪声），并将输入的语音信号转换为分组语音信号。 分组化语音信号经由网络传输到出口网络。 出口网络接收分组语音信号，将分组语音信号转换为输出语音信号，并输出输出语音信号。 出口网络还从接收的分组语音信号中提取并存储噪声分组，并将分组化的噪声信号转换成输出噪声信号。 当接入网络在呼叫仍然进行时停止接收输入语音信号，接入网络指示出口网络连续地输出输出噪声信号。

公开(公告)号：US20090161835A1

公开(公告)日：2009-06-25

申请号：US12395176

申请日：2009-02-27

申请人： WALLACE SMITH ,  James H. James ,  David Ramsden

发明人： WALLACE SMITH ,  James H. James ,  David Ramsden

IPC分类号： H04M1/24 ,  H04M9/08

CPC分类号： H04B3/23

摘要： A system that incorporates teachings of the present disclosure may include, for example, an echo measurement device having a controller to transmit a test signal in a communication path which is looped back at an end point identified as having an echo problem. The test signal can be transmitted at a remote location from the end point. The test signal can be represented by a limited burst signal of one or more frequencies operating outside a range of an operating frequency of an echo canceller deactivation signal transmitted in the communication path. Additional embodiments are disclosed.

摘要翻译： 包括本公开的教导的系统可以包括例如具有控制器的回波测量装置，该控制器在通信路径中发送测试信号，所述通信路径在被识别为具有回波问题的终点处被环回。 测试信号可以在距终点的远程位置传输。 测试信号可以由在通信路径中发送的回波消除器去激活信号的操作频率范围之外的一个或多个频率的有限突发信号来表示。 公开了另外的实施例。

公开(公告)号：US08208622B2

公开(公告)日：2012-06-26

申请号：US12582746

申请日：2009-10-21

申请人： Bing Chen ,  James H. James

发明人： Bing Chen ,  James H. James

IPC分类号： H04M9/08

CPC分类号： H04M3/26 ,  H04B3/23 ,  H04B3/493

摘要： Testing equipment for and a method of performance testing an echo canceller are disclosed. The method includes generating a white noise test signal that includes a plurality of high-level white noise time segments, each of which is separated by a low-level white noise time gap. The generated white noise test signal is transmitted to the echo canceller. At least one echo output signal is received from the echo canceller, and the echo output signal results from the white noise test signal. The level and duration of the received at least one echo output signal are measured.

摘要翻译： 公开了用于测试回波消除器的测试设备和性能测试方法。 该方法包括产生白噪声测试信号，该信号包括多个高电平白噪声时间段，每个白噪声时间段由低电平白噪声时间间隔分开。 产生的白噪声测试信号被传送到回波消除器。 从回波消除器接收至少一个回波输出信号，并且回波输出信号来自白噪声测试信号。 测量所接收的至少一个回波输出信号的电平和持续时间。

公开(公告)号：US07876718B1

公开(公告)日：2011-01-25

申请号：US11594599

申请日：2006-11-08

申请人： James H. James

发明人： James H. James

IPC分类号： H04B3/20 ,  H04M9/08

CPC分类号： H04B3/23

摘要： This invention provides a technique to reduce echoes not adequately attenuated by echo cancellers during initial periods of voice communication. Signals transmitted across communication networks are often reflected back to the caller resulting in echo. Echo cancellers are employed in the communication system to cancel this effect in order to maintain a high quality transmission. However, echo cancellers require time to detect, adapt, and effectively remove echo, often resulting in echo during the initial moments of the call and thereby degrading the quality of service. By installing an attenuation device into the communication system, all signals that pass through it are reduced to a preset value for a set period of time. This reduces any echo below a detectable threshold. After the period of time expires, the attenuation device allows the signal to pass unaffected, by which time the echo cancellers have adaptively adjusted to any echoes in the system.

摘要翻译： 本发明提供了一种在语音通信的初始阶段减少由回波消除器未充分衰减的回波的技术。 通过通信网络传输的信号通常反映给呼叫者，从而产生回声。 在通信系统中采用回波消除器来消除此效应，以保持高质量的传输。 然而，回声消除器需要时间来检测，适应和有效地去除回声，通常在通话的初始时刻导致回声，从而降低服务质量。 通过将衰减装置安装到通信系统中，通过它的所有信号在一段时间内被减少到预设值。 这减少了可检测阈值以下的任何回波。 在该时间段到期后，衰减装置允许信号通过不受影响，此时回波消除器已经自适应地调整到系统中的任何回波。

公开(公告)号：US20100040204A1

公开(公告)日：2010-02-18

申请号：US12582746

申请日：2009-10-21

申请人： Bing Chen ,  James H. James

发明人： Bing Chen ,  James H. James

IPC分类号： H04M1/24

CPC分类号： H04M3/26 ,  H04B3/23 ,  H04B3/493

摘要： Testing equipment for and a method of performance testing an echo canceller are disclosed. The method includes generating a white noise test signal that includes a plurality of high-level white noise time segments, each of which is separated by a low-level white noise time gap. The generated white noise test signal is transmitted to the echo canceller. At least one echo output signal is received from the echo canceller, and the echo output signal results from the white noise test signal. The level and duration of the received at least one echo output signal are measured.

摘要翻译： 公开了用于测试回波消除器的测试设备和性能测试方法。 该方法包括产生白噪声测试信号，该信号包括多个高电平白噪声时间段，每个白噪声时间段由低电平白噪声时间间隔分开。 产生的白噪声测试信号被传送到回波消除器。 从回波消除器接收至少一个回波输出信号，并且回波输出信号来自白噪声测试信号。 测量所接收的至少一个回波输出信号的电平和持续时间。

公开(公告)号：US08346543B2

公开(公告)日：2013-01-01

申请号：US13050022

申请日：2011-03-17

申请人： Bing Chen ,  James H. James

发明人： Bing Chen ,  James H. James

IPC分类号： G10L11/06

CPC分类号： G10L25/93 ,  G10L15/20 ,  G10L19/012 ,  G10L25/21 ,  G10L25/45 ,  G10L25/78 ,  G10L25/84 ,  G10L2025/935

摘要： A VAD/SS system is connected to a channel of a transmission pipe. The channel provides a pathway for the transmission of energy. A method for operating a VAD/SS system includes detecting the energy on the channel, and activating or suppressing activation of the VAD/SS system depending upon the nature of the energy detected on the channel.

摘要翻译： VAD / SS系统连接到传输管道的通道。 该通道为能量传输提供了一条途径。 用于操作VAD / SS系统的方法包括检测信道上的能量，以及根据在信道上检测到的能量的性质来激活或抑制VAD / SS系统的激活。

公开(公告)号：US07831025B1

公开(公告)日：2010-11-09

申请号：US11434473

申请日：2006-05-15

申请人： John D. Francis ,  Laurie F. Garrison ,  James H. James

发明人： John D. Francis ,  Laurie F. Garrison ,  James H. James

IPC分类号： H04M1/24 ,  H04M3/08 ,  H04M3/22

CPC分类号： H04M3/2236

摘要： A method and system for administering a subjective listening test to remote users. A user can participate in a subjective listening test, such as an MOS listening test, over a telephone call. The telephone call is received and audio recordings are sequentially played over the telephone call. Quality ratings corresponding to the audio recordings are input by the user over the telephone call. The user can input digits corresponding to the quality ratings. This allows a user to take part in a subjective listening test without traveling to a lab.

摘要翻译： 一种用于向远程用户管理主观听力测试的方法和系统。 用户可以通过电话参与主观聆听测试，例如MOS聆听测试。 收到电话，并通过电话顺序播放录音。 与音频记录对应的质量等级由用户通过电话呼叫输入。 用户可以输入与质量等级对应的数字。 这允许用户在不去实验室的情况下参加主观聆听测试。

公开(公告)号：US07830862B2

公开(公告)日：2010-11-09

申请号：US11030785

申请日：2005-01-07

申请人： James H. James

发明人： James H. James

IPC分类号： H04L12/66

CPC分类号： H04L29/06027 ,  G10L19/005 ,  G10L19/167 ,  H04L47/10 ,  H04L47/2416 ,  H04L47/38 ,  H04L49/90 ,  H04L65/80

摘要： A system and method for reducing delay introduced by de-jitter buffers in a VoIP network is presented. The method aspect for receiving and presenting speech data received from a VoIP network comprises monitoring speech-related packets received from a packet network and based on the monitoring, either maintaining a normal speech rate, compressing the speech rate or expanding the speech rate. The speech associated with the received packets is played out (presented audible via a speaker or other means) at the normal, compressed or expanded speech rate.

摘要翻译： 提出了一种用于减少由VoIP网络中的抖动缓冲器引入的延迟的系统和方法。 用于接收和呈现从VoIP网络接收的语音数据的方法方面包括监视从分组网络接收到的语音相关分组，并且基于监视，维持正常语速，压缩语速或扩展语速。 与所接收的分组相关联的语音以普通的，压缩的或扩展的语音速率被播放（通过扬声器或其他方式呈现出来）。

公开(公告)号：US07516033B2

公开(公告)日：2009-04-07

申请号：US11426226

申请日：2006-06-23

申请人： Wallace F. Smith ,  James H. James ,  David B. Ramsden

发明人： Wallace F. Smith ,  James H. James ,  David B. Ramsden

IPC分类号： G06F19/00

CPC分类号： H04B3/23

摘要： A method and apparatus for identifying echo sources in a communication path. A system that incorporates teachings of the present disclosure may include, for example, an echo measurement device (EMD) having a transmit module to transmit an echo canceller deactivation signal in a communication path of the communication system, wherein the echo canceller deactivation signal deactivates one or more echo cancellers in said communication path. The transmit module can also transmit a test signal in the communication path which is looped back at an end point identified as having an echo problem, wherein the test signal is transmitted at a remote location from the end point. The EMD can further include a detection module to detect one or more echo signals associated with the test signal. Additional embodiments are disclosed.

摘要翻译： 一种用于识别通信路径中的回波源的方法和装置。 结合本公开的教导的系统可以包括例如具有发射模块以在通信系统的通信路径中发送回波消除器去激活信号的回波测量装置（EMD），其中回波消除器去激活信号使一个 或更多的回声消除器。 发射模块还可以在通信路径中发送测试信号，该测试信号在被识别为具有回波问题的终点被环回，其中测试信号在距离终点的远程位置发送。 EMD还可以包括检测模块以检测与测试信号相关联的一个或多个回波信号。 公开了另外的实施例。