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1. 发明授权

US4757495A Speech and data multiplexor optimized for use over impaired and bandwidth restricted analog channels 失效
标题翻译：语音和数据多路复用器被优化用于受损和带宽限制的模拟通道
公开(公告)号：US4757495A
公开(公告)日：1988-07-12
申请号：US836438
申请日：1986-03-05
申请人： Dwight W. Decker , Payne Freret , Dirk Hughes-Hartogs , Mark B. Flowers , Frederick L. Mueller
发明人： Dwight W. Decker , Payne Freret , Dirk Hughes-Hartogs , Mark B. Flowers , Frederick L. Mueller
IPC分类号： H04L27/26 , H04M11/06 , H04J1/14
CPC分类号： H04L5/0005 , H04L5/0044 , H04M11/062 , H04L5/0053
摘要： The present invention relates to an apparatus and method for the simultaneous transmission of analog speech and modulated data, such apparatus and method being optimized for use over impaired and bandwidth restricted analog channels, or digital representations of such channels. In each instance of use, an evaluation is made of the available channel bandwidth, with a frequency division multiplex scheme allocating a voice sub-band, with data transmission allocated to sub-bands above, below, or around, this selected voice sub-band. The speech and data sub-band allocations are made by the multiplexor in response to user input of either a requested speech quality, a requested data rate, or a value indicating the relative user weighting of speech quality and data rate. A multi-carrier multi-mode modulation scheme is employed for data transmission, with this scheme having the ability to fully utilize the remaining bandwidth, and further, being capable of adapting to the impairments most likely present on the fringes of bandwidth restricted analog channels. When the analog channel employed is the standard voice-grade telephone circuit, good speech quality simultaneously with 3000 bps data transmission may be expected. The further ability to automatically switch to full bandwidth data transmission when voice transmission is not being attempted is also provided.
摘要翻译：本发明涉及一种用于同时传输模拟语音和调制数据的装置和方法，该装置和方法被优化用于受损和带宽限制的模拟信道或这些信道的数字表示。在每个使用情况下，对可用信道带宽进行评估，其中分配多个分配多个方式的语音子带，其数据传输被分配给该选择的话音子带上方，下方或周围的子带。响应于请求的语音质量，请求的数据速率或指示语音质量和数据速率的相对用户权重的值的用户输入，多路复用器进行语音和数据子带分配。采用多载波多模调制方案进行数据传输，该方案具有充分利用剩余带宽的能力，并且还能够适应最有可能存在于带宽限制的模拟信道边缘上的损伤。当采用的模拟通道是标准语音级电话电路时，可以预期在3000bps的数据传输的同时具有良好的语音质量。还提供了在不尝试语音传输时自动切换到全带宽数据传输的进一步能力。

2. 发明授权

US09391834B2 Apparatus, systems and methods of common-mode rejection ratio based diagnostics 有权
标题翻译：基于共模抑制比的诊断装置，系统和方法
公开(公告)号：US09391834B2
公开(公告)日：2016-07-12
申请号：US14384368
申请日：2012-03-12
申请人： Chan-Soo Hwang , Geoffrey G. Moyer , Mark B. Flowers , Mehdi Mohseni
发明人： Chan-Soo Hwang , Geoffrey G. Moyer , Mark B. Flowers , Mehdi Mohseni
IPC分类号： H04M1/24 , H04M3/08 , H04M3/22 , H04L12/24 , H04M3/30 , H04M11/06
CPC分类号： H04L41/0631 , H04M3/305 , H04M3/306 , H04M11/062
摘要： In accordance with embodiments disclosed herein, there are provided apparatus, systems and methods for detecting a boundary condition via common mode diagnostics; and to apparatus, systems and methods for detecting a fault condition via common-mode rejection ratio diagnostics. For example, in one embodiment such means include, means for injecting differential mode signal probes onto two conductors of a Digital Subscriber Line (DSL line); means for measuring a common-mode rejection ratio (CMRR) of the differential mode signal probes; means for measuring impedance of the differential mode signal probes; and means for identifying which of an asymmetric fault condition or a symmetric fault condition is present on the line based on both: (a) the measured CMRR of the differential mode signal probes and (b) the measured impedance of the differential mode signal probes.
摘要翻译：根据本文公开的实施例，提供了通过共模诊断来检测边界条件的装置，系统和方法; 以及用于通过共模抑制比诊断来检测故障状态的装置，系统和方法。例如，在一个实施例中，这种装置包括用于将差模信号探针注入到数字用户线（DSL线路）的两个导体上的装置; 用于测量差模信号探头的共模抑制比（CMRR）的装置; 用于测量差模信号探头阻抗的装置; 以及用于基于以下两者来识别在线上存在不对称故障状况或对称故障状况中的哪一个的装置：（a）差模信号探头的测量CMRR和（b）差模信号探针的测量阻抗。

3. 发明申请

US20120051410A1 DSL NOISE CANCELLATION 有权
标题翻译： DSL噪音消除
公开(公告)号：US20120051410A1
公开(公告)日：2012-03-01
申请号：US13254454
申请日：2009-03-04
申请人： Mark B. Flowers , Mark Mallory , Mark Brady , John M. Cioffi , Mehdi Mohseni
发明人： Mark B. Flowers , Mark Mallory , Mark Brady , John M. Cioffi , Mehdi Mohseni
IPC分类号： H04L25/08 , H04L5/16 , H04B17/00
CPC分类号： H04B3/32 , H04B1/7107 , H04J11/004 , H04L27/2647 , H04N7/102
摘要： A method and apparatus in a noise cancellation system that receives a noise reference signal via a noise reference signal input port, and performs at least one of procedures a and b set forth below for reducing noise in a DSL data signal transmitted on a DSL transmission line to which the noise cancellation system is coupled: a.i.) creating a noise free representation of a DSL synchronization symbol repeatedly occurring in the transmitted DSL data signal, and a.ii.) reducing the noise in the transmitted DSL data signal based on the noise free representation of the DSL synchronization symbol and the received noise reference signal, and b.i.) analyzing at least one of the received noise reference signal and the transmitted DSL data signal to identify one or more frequency bands in which to de-emphasize noise cancellation in the transmitted DSL data signal, and b.ii.) causing the noise cancellation system to de-emphasize noise cancellation in the identified one or more frequency bands of the transmitted DSL data signal, responsive to the analysis.
摘要翻译：一种噪声消除系统中的方法和装置，其经由噪声参考信号输入端口接收噪声参考信号，并执行以下步骤a和b中的至少一个，以减少在DSL传输线路上发送的DSL数据信号中的噪声噪声消除系统被耦合到其上：ai）创建在所发送的DSL数据信号中重复发生的DSL同步符号的无噪声表示，以及a）基于无噪声来减少发送的DSL数据信号中的噪声 DSL同步符号和接收到的噪声参考信号的表示，以及bi）分析接收到的噪声参考信号和所发送的DSL数据信号中的至少一个，以识别在所发送的DSL数据信号中去除强调噪声消除的一个或多个频带 DSL数据信号和b.ii.），使得噪声消除系统在所识别的一个或多个频带中去强调噪声消除发送的DSL数据信号，响应于分析。

4. 发明申请

US20150043720A1 APPARATUS, SYSTEMS AND METHODS OF COMMON-MODE REJECTION RATIO BASED DIAGNOSTICS 有权
标题翻译：共模抑制率比较法的设备，系统与方法
公开(公告)号：US20150043720A1
公开(公告)日：2015-02-12
申请号：US14384368
申请日：2012-03-12
申请人： Chan-Soo Hwang , Geoffrey G. Moyer , Mark B. Flowers , Mehdi Mohseni
发明人： Chan-Soo Hwang , Geoffrey G. Moyer , Mark B. Flowers , Mehdi Mohseni
IPC分类号： H04L12/24 , H04M3/30
CPC分类号： H04L41/0631 , H04M3/305 , H04M3/306 , H04M11/062
摘要： In accordance with embodiments disclosed herein, there are provided apparatus, systems and methods for detecting a boundary condition via common mode diagnostics; and to apparatus, systems and methods for detecting a fault condition via common-mode rejection ratio diagnostics. For example, in one embodiment such means include, means for injecting differential mode signal probes onto two conductors of a Digital Subscriber Line (DSL line); means for measuring a common-mode rejection ratio (CMRR) of the differential mode signal probes; means for measuring impedance of the differential mode signal probes; and means for identifying which of an asymmetric fault condition or a symmetric fault condition is present on the line based on both: (a) the measured CMRR of the differential mode signal probes and (b) the measured impedance of the differential mode signal probes.
摘要翻译：根据本文公开的实施例，提供了通过共模诊断来检测边界条件的装置，系统和方法; 以及用于通过共模抑制比诊断来检测故障状态的装置，系统和方法。例如，在一个实施例中，这种装置包括用于将差模信号探针注入到数字用户线（DSL线路）的两个导体上的装置; 用于测量差模信号探头的共模抑制比（CMRR）的装置; 用于测量差模信号探头阻抗的装置; 以及用于基于以下两者来识别在线上存在不对称故障状况或对称故障状况中的哪一个的装置：（a）差模信号探头的测量CMRR和（b）差模信号探针的测量阻抗。

5. 发明申请

US20130170629A1 NON-INVASIVE DIAGNOSTIC TRANSMISSION LINE TESTING 有权
标题翻译：非入门诊断传输线测试
公开(公告)号：US20130170629A1
公开(公告)日：2013-07-04
申请号：US13696798
申请日：2010-05-10
申请人： Mark B. Flowers , Mark H. Brady , Marc H. Goldburg , Mark P. Mallory , Ardavan Maleki Tehrani
发明人： Mark B. Flowers , Mark H. Brady , Marc H. Goldburg , Mark P. Mallory , Ardavan Maleki Tehrani
IPC分类号： H04M3/28
CPC分类号： H04M3/28 , H04B3/46 , H04M3/306 , H04M11/062
摘要： A probing signal transmitted on a twisted pair telephone line in a DSL system is reflected and received at a DSL device. An estimate of one of a DSL data transmission signal or DSL synch symbol transmission signal is removed from the received probing signal to recover the reflected probing signal. The recovered reflected probing signal is processed to determine characteristics information of the twisted pair telephone line.
摘要翻译：在DSL系统的双绞线电话线上发送的探测信号在DSL设备被反射和接收。从接收到的探测信号中去除DSL数据传输信号或DSL同步符号传输信号之一的估计，以恢复反射的探测信号。处理恢复的反射探测信号以确定双绞线电话线的特征信息。

6. 发明授权

US5754592A Method and apparatus for randomized oversampling 失效
标题翻译：随机抽样方法和装置
公开(公告)号：US5754592A
公开(公告)日：1998-05-19
申请号：US678882
申请日：1996-07-02
申请人： Mark B. Flowers , John A. C. Bingham , Michael D. Agah
发明人： Mark B. Flowers , John A. C. Bingham , Michael D. Agah
IPC分类号： H03M1/08 , H03M1/12 , H03M1/66 , H04B14/04 , H03M1/10
CPC分类号： H03M1/0854 , H04B14/046 , H03M1/12 , H03M1/66
摘要： An oversampling technique that improves signal-to-quantization noise ratio without requiring substantial amounts of processing power is disclosed. The oversampling technique determines the oversample values by successively scaling the previous value using a scaling factor. The effect of the invention is the randomize the quantization error for each of the oversample values so that the quantization error becomes uncorrelated from one oversample value to the next. When such decorrelation occurs, the quantization noise is spread over the enlarged frequency band associated with the oversampling. The invention is applicable to any transmission scheme which utilizes oversampling and digital-to-analog conversion.
摘要翻译：公开了一种在不需要大量处理能力的情况下提高信号到量化噪声比的过采样技术。过采样技术通过使用缩放因子连续缩放先前值来确定过采样值。本发明的效果是随机化每个过采样值的量化误差，使得量化误差从一个过采样值到下一个过采样值变得不相关。当发生这种去相关时，量化噪声在与过采样相关联的放大频带上扩展。本发明适用于利用过采样和数模转换的任何传输方案。

7. 发明申请

US20150030139A1 APPARATUS, SYSTEMS AND METHODS OF COMMON MODE BASED DIAGNOSTICS 有权
标题翻译：基于通用模式诊断的装置，系统和方法
公开(公告)号：US20150030139A1
公开(公告)日：2015-01-29
申请号：US14384366
申请日：2012-03-12
申请人： Chan-Soo Hwang , Geoffrey G. Moyer , Mark B. Flowers
发明人： Chan-Soo Hwang , Geoffrey G. Moyer , Mark B. Flowers
IPC分类号： H04M3/26
CPC分类号： H04M3/26 , H04M3/306 , H04M11/062
摘要： In accordance with embodiments disclosed herein, there are provided apparatus, systems and methods for detecting a boundary condition via common mode diagnostics; and to apparatus, systems and methods for detecting a fault condition via common-mode rejection ratio diagnostics. For example, in one embodiment such means include, means for injecting a common mode signal probe onto a first end of a Digital Subscriber Line (DSL line); means for measuring impedance of the common mode signal probe on the DSL line at the first end of the DSL line; means for detecting an impedance anomaly on the DSL line based on the measured impedance of the common mode signal probe; and means for correlating the impedance anomaly on the DSL line to a boundary condition on the DSL line.
摘要翻译：根据本文公开的实施例，提供了通过共模诊断来检测边界条件的装置，系统和方法; 以及用于通过共模抑制比诊断来检测故障状态的装置，系统和方法。例如，在一个实施例中，这种装置包括用于将共模信号探针注入到数字用户线路（DSL线路）的第一端上的装置; 用于在DSL线路的第一端测量DSL线上的共模信号探头的阻抗的装置; 用于根据测得的共模信号探头的阻抗来检测DSL线路上的阻抗异常的装置; 以及用于将DSL线路上的阻抗异常与DSL线路上的边界条件相关联的装置。

8. 发明申请

US20140334609A1 NON-INVASIVE DIAGNOSTIC TRANSMISSION LINE TESTING 审中-公开
标题翻译：非入门诊断传输线测试
公开(公告)号：US20140334609A1
公开(公告)日：2014-11-13
申请号：US14341659
申请日：2014-07-25
申请人： Mark B. Flowers , Mark H. Brady , Marc Goldburg , Mark P. Mallory , Ardavan Maleki Tehrani
发明人： Mark B. Flowers , Mark H. Brady , Marc Goldburg , Mark P. Mallory , Ardavan Maleki Tehrani
IPC分类号： H04M3/30 , H04M11/06
CPC分类号： H04M3/306 , H04M11/062
摘要： A probing signal transmitted on a twisted pair telephone line in a DSL system is reflected and received at a DSL device. An estimate of one of a DSL data transmission signal or DSL synch symbol transmission signal is removed from the received probing signal to recover the reflected probing signal. The recovered reflected probing signal is processed to determine characteristics information of the twisted pair telephone line.
摘要翻译：在DSL系统的双绞线电话线上发送的探测信号在DSL设备被反射和接收。从接收到的探测信号中去除DSL数据传输信号或DSL同步符号传输信号之一的估计，以恢复反射的探测信号。处理恢复的反射探测信号以确定双绞线电话线的特征信息。

9. 发明授权

US5623513A Mitigating clipping and quantization effects in digital transmission systems 失效
标题翻译：减轻数字传输系统中的限幅和量化效应
公开(公告)号：US5623513A
公开(公告)日：1997-04-22
申请号：US165509
申请日：1993-12-13
申请人： Jacky S. Chow , John A. C. Bingham , Mark B. Flowers , John M. Cioffi
发明人： Jacky S. Chow , John A. C. Bingham , Mark B. Flowers , John M. Cioffi
IPC分类号： H04M1/60 , H04B3/23 , H04B14/04 , H04J11/00 , H04L27/26 , H04Q3/42 , H04L5/16 , H04B15/00
CPC分类号： H04L27/2647 , H04B14/046 , H04B3/23 , H04L27/2602 , H04L27/2623
摘要： A transmission system includes transmit and receive paths coupled via a hybrid circuit to a bidirectional transmission path. The transmit path includes a digital-to-analog converter (DAC) having a given range and precision. The transmit path signal is limited and truncated to this range and precision before the DAC. In one arrangement including an echo canceller coupled between the transmit and receive paths, a difference of the transmit path signal before and after limiting and truncation is used to produce an estimated echo response which is subtracted from the receive path signal. In another arrangement, all of the inputs to the echo canceller are derived from the transmit path after the limiting and truncation. Instead, or in addition, the amplitudes of transmit path signal samples can be shaped in conjunction with the limiting. The system can in particular be an ADSL transmission system using multicarrier modulation. In such a system the amplitudes of transmit path signal samples can be scaled to reduce clipping, with an indication of the scaling being transmitted to a remote receiver.
摘要翻译：传输系统包括经由混合电路耦合到双向传输路径的发射和接收路径。发射路径包括具有给定范围和精度的数模转换器（DAC）。传输路径信号被限制并在DAC之前被截断到这个范围和精度。在包括耦合在发送和接收路径之间的回波消除器的一种布置中，使用限制和截断之前和之后的发送路径信号的差异来产生从接收路径信号中减去的估计回波响应。在另一种布置中，回波消除器的所有输入从限制和截断之后的发送路径导出。替代地，或者另外，传输路径信号样本的幅度可以与限制一起成形。该系统可以特别地是使用多载波调制的ADSL传输系统。在这样一个系统中，发送路径信号样本的幅度可以被缩放以减少削波，并且缩放的指示被发送到远程接收机。

10. 发明授权

US09819388B2 DSL noise cancellation 有权
公开(公告)号：US09819388B2
公开(公告)日：2017-11-14
申请号：US13254454
申请日：2009-03-04
申请人： Mark B. Flowers , Mark Mallory , Mark Brady , John M. Cioffi , Mehdi Mohseni
发明人： Mark B. Flowers , Mark Mallory , Mark Brady , John M. Cioffi , Mehdi Mohseni
IPC分类号： H04L25/08 , H04B3/32 , H04B1/7107 , H04N7/10 , H04J11/00 , H04L27/26
CPC分类号： H04B3/32 , H04B1/7107 , H04J11/004 , H04L27/2647 , H04N7/102
摘要： A method and apparatus in a noise cancellation system that receives a noise reference signal via a noise reference signal input port, and performs at least one of procedures a and b set forth below for reducing noise in a DSL data signal transmitted on a DSL transmission line to which the noise cancellation system is coupled: a.i.) creating a noise free representation of a DSL synchronization symbol repeatedly occurring in the transmitted DSL data signal, and a.ii.) reducing the noise in the transmitted DSL data signal based on the noise free representation of the DSL synchronization symbol and the received noise reference signal, and b.i.) analyzing at least one of the received noise reference signal and the transmitted DSL data signal to identify one or more frequency bands in which to de-emphasize noise cancellation in the transmitted DSL data signal, and b.ii.) causing the noise cancellation system to de-emphasize noise cancellation in the identified one or more frequency bands of the transmitted DSL data signal, responsive to the analysis.

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