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1. 发明授权

US4525846A Modem in-band secondary channel via radial modulation 失效
标题翻译：调制解调器带内二次通道径向调制
公开(公告)号：US4525846A
公开(公告)日：1985-06-25
申请号：US453165
申请日：1982-12-27
申请人： Gordon Bremer , William L. Betts , Robert T. Greene
发明人： Gordon Bremer , William L. Betts , Robert T. Greene
IPC分类号： H04L27/20 , H04L27/34 , H04L27/08
CPC分类号： H04L27/2071 , H04L27/3472
摘要： A transmission system for transmitting a first data series, and a second data series from a first modem to a second modem using QAM or PSK type modulation techniques. The first data series is sent using standard QAM techniques such as an 8-point scheme, wherein each point has a radial component. The second data series is sent by modulating slightly the radial components of the transmitted symbols between two values in accordance with the second data series.
摘要翻译：一种用于使用QAM或PSK型调制技术从第一调制解调器发送第一数据序列和第二数据序列的传输系统。使用诸如8点方案的标准QAM技术发送第一数据系列，其中每个点具有径向分量。通过根据第二数据序列稍微调制两个值之间的发射符号的径向分量来发送第二数据序列。

2. 发明授权

US4037226A Pulse code modulation compressor 失效
标题翻译：脉冲编码调制压缩机
公开(公告)号：US4037226A
公开(公告)日：1977-07-19
申请号：US647298
申请日：1976-01-07
申请人： William L. Betts , Robert T. Greene
发明人： William L. Betts , Robert T. Greene
IPC分类号： H03G7/00 , H03M7/50 , H04L3/00
CPC分类号： H03M7/50 , H03G7/007
摘要： A pulse code modulation compressor converts linear pulse code modulation words into companded pulse code modulation words. A read only memory is loaded with a conversion table and used to perform successive approximations for the conversion. The converted output is then passed through a double buffer to allow independent operation of the conversion clock and output clock.
摘要翻译：脉冲编码调制压缩器将线性脉冲编码调制字转换为压缩脉冲编码调制字。只读存储器加载了一个转换表，用于对转换执行逐次逼近。转换的输出然后通过双缓冲器，以允许转换时钟和输出时钟的独立操作。

3. 发明授权

US06782096B1 Subscriber line driver and termination 有权
标题翻译：用户线路驱动和终止
公开(公告)号：US06782096B1
公开(公告)日：2004-08-24
申请号：US09439933
申请日：1999-11-12
申请人： Gordon Bremer , Chuck Coston , Ed Thoenes , William L. Betts , Thomas J. Bingel , Rafael Martinez
发明人： Gordon Bremer , Chuck Coston , Ed Thoenes , William L. Betts , Thomas J. Bingel , Rafael Martinez
IPC分类号： H04M100
CPC分类号： H04L25/028 , H04L5/06 , H04L25/03343 , H04M11/062
摘要： A subscriber line driver (SLD) is provided for the continuous and automatic transformation of the characteristics of a communication system signal so that the signal conforms to a power spectral distribution (PSD) standard. The signal is transformed by the SLD which may increase (amplify) portions of the signal to a predefined specification, decrease (attenuate) portions of the signal to a predefined specification, and/or frequency modulate or filter the transmit signal frequencies to fit within the communication channel frequency bandwidth as defined by a predefined frequency band. After modification by the SLD, the transformed communication signal is injected (transmitted) into a communication transmission line. An SLD device can be employed in a variety of communication systems such as a public telephony system, a private branch exchange (PBX), a coaxial cable system, a fiber optic system, a microwave system, a radio communication system or the like. In the preferred embodiment, the SLD device operates in connection with a telephony system local loop which is operated as a digital subscriber loop (DSL). The SLD has an infinite input impedance at all frequencies. Addition of a parallel resister can enable the design engineer to set the transmission system terminating impedance to any desired value. This SLD can also be implemented in connection with a telephony system central office (CO) or a PBX.
摘要翻译：提供用户线驱动器（SLD）用于连续和自动地变换通信系统信号的特性，使得信号符合功率谱分布（PSD）标准。信号被SLD变换，SLD可以将信号的部分增加（放大）到预定义的规范，将信号的部分减少（衰减）到预定义的规范，和/或频率调制或滤波发射信号频率以适应通信信道频带宽度由预定频带定义。在通过SLD修改之后，将变换的通信信号注入（发送）到通信传输线中。 SLD设备可以用于诸如公共电话系统，私人交换机（PBX），同轴电缆系统，光纤系统，微波系统，无线电通信系统等各种通信系统中。在优选实施例中，SLD设备与作为数字用户环路（DSL）操作的电话系统本地环路相连。 SLD在所有频率都有无限的输入阻抗。添加并联电阻可以使设计工程师将传输系统的终端阻抗设置为任何所需的值。该SLD还可以与电话系统中心局（CO）或PBX相连。

4. 发明授权

US06307893B1 System and method for transmit signal spectral shaping 失效
标题翻译：发射信号频谱整形的系统和方法
公开(公告)号：US06307893B1
公开(公告)日：2001-10-23
申请号：US09015478
申请日：1998-01-28
申请人： Gordon Bremer , William L. Betts
发明人： Gordon Bremer , William L. Betts
IPC分类号： H04K102
CPC分类号： H04L27/34 , H04L25/497
摘要： A system and method for shaping a transmit signal spectrum allows a transmit precoder and a spectral shaping filter to precode and shape a transmit signal without the need for receiving communication channel response information from a receiver or the need for a training period. The resultant shaped transmit spectrum signal meets regulatory requirements for the amount of energy transmitted per hertz of bandwidth.
摘要翻译：用于整形发射信号频谱的系统和方法允许发射预编码器和频谱整形滤波器对发射信号进行预编码和形状，而不需要从接收机接收通信信道响应信息或者需要训练周期。所得到的成形的发射频谱信号满足每赫兹带宽传输的能量的规定要求。

5. 发明授权

US6157680A Audio distortion canceler method and apparatus 失效
标题翻译：音频失真消除器方法和装置
公开(公告)号：US6157680A
公开(公告)日：2000-12-05
申请号：US34508
申请日：1998-03-04
申请人： William L. Betts , Gordon Bremer
发明人： William L. Betts , Gordon Bremer
IPC分类号： H04L5/02 , H04B15/00 , H04L5/16
CPC分类号： H04L5/023
摘要： In a communications environment where it is desirable to allow the simultaneous transmission of digital data and conventional voice on a single communication line, an audio distortion canceler method and apparatus is configured to adaptively cancel the nonlinear low frequency audible harmonic distortion caused by a device, such as a conventional telephone, connected to the communication line. The method and apparatus of the present invention has application where a harmonic distortion signal resides in a region of the frequency spectrum that is apart from that of the transmit spectrum.
摘要翻译：在希望允许在单个通信线路上同时传输数字数据和常规语音的通信环境中，音频失真消除器方法和装置被配置为自适应地抵消由设备引起的非线性低频可听谐波失真，例如作为常规电话，连接到通信线路。本发明的方法和装置具有应用，其中谐波失真信号驻留在与发射频谱的频谱分开的频谱的区域中。

6. 发明授权

US5521942A Method for increasing the dynamic range of a signal in a simultaneous voice and data system by the use of overlapping signal point regions and trellis coding 失效
标题翻译：通过使用重叠信号点区域和网格编码来增加同时语音和数据系统中的信号的动态范围的方法
公开(公告)号：US5521942A
公开(公告)日：1996-05-28
申请号：US76507
申请日：1993-06-14
申请人： William L. Betts , Gordon Bremer , Luke J. Smithwick , Edward S. Zuranski
发明人： William L. Betts , Gordon Bremer , Luke J. Smithwick , Edward S. Zuranski
IPC分类号： H03M13/00 , H03M13/01 , H03M13/25 , H04L27/34 , H04L27/04 , G06F11/10 , H04L5/12 , H04L23/02
CPC分类号： H03M13/25 , H03M13/01 , H04L27/3433 , H04L27/3483
摘要： A communications system simultaneously transmits both a primary data signal and a secondary voice signal in such a way that the dynamic range of the secondary voice signal is increased even though deliberate errors are introduced into the transmitted data portion of the signal. In particular, the communications system includes an error correcting technique like channel encoding and the constellation signal space is divided into a number of regions, where at least one of the regions overlaps with another region. The primary signal is channel encoded to select a particular one of the number of regions, the region being represented by a reference signal point value. The voice signal is encoded to provide a signal point vector, which is added to the reference signal point in such a way that the resultant signal point is located in the overlapping region thereby deliberately introducing an error into the resulting transmitted signal point stream. Notwithstanding the deliberately introduced error, the channel encoding of the primary signal allows a receiver to recover the originally selected reference signal point value, which when subtracted from the received signal point value approximates the voice signal.
摘要翻译：通信系统同时发送主数据信号和辅助语音信号，使得即使有意的错误被引入到信号的发送数据部分中，辅助语音信号的动态范围也增加。特别地，通信系统包括像信道编码的纠错技术，并且星座信号空间被划分成多个区域，其中至少一个区域与另一个区域重叠。信道编码主信号以选择区域数目中的特定一个，该区域由参考信号点值表示。语音信号被编码以提供信号点向量，其被添加到参考信号点，使得所得到的信号点位于重叠区域中，从而故意将错误引入到所得到的发送信号点流中。尽管故意引入的误差，主信号的信道编码允许接收机恢复原来选择的参考信号点值，当从接收信号点值减去近似该语音信号时。

7. 发明授权

US5099478A Communication of secondary channel byte in a synchronous modem without statistical uncertainty 失效
标题翻译：在同步调制解调器中的二次通道字节的通信没有统计学不确定性
公开(公告)号：US5099478A
公开(公告)日：1992-03-24
申请号：US355663
申请日：1989-05-23
申请人： Gordon Bremer , William L. Betts
发明人： Gordon Bremer , William L. Betts
IPC分类号： H04L5/24
CPC分类号： H04L5/24
摘要： A method and system for communicating data over a communications channel such as a telephone line includes the conversion of asynchronous data transmitted from a diagnostic microcomputer through a modem into synchronous data for transmission over the communications channel. The method includes the use of error vectors to shift the asynchronous data into a continuous synchronous stream of data bits.
摘要翻译：用于通过诸如电话线的通信信道传送数据的方法和系统包括通过调制解调器从诊断微型计算机发送的异步数据的转换为通过通信信道传输的同步数据。该方法包括使用错误向量将异步数据移动到连续同步的数据位流中。

8. 发明授权

US07747000B2 Subscriber line driver with equalizer 有权
标题翻译：具有均衡器的用户线路驱动器
公开(公告)号：US07747000B2
公开(公告)日：2010-06-29
申请号：US10889858
申请日：2004-07-13
申请人： Gordon Bremer , Chuck Coston , Ed Thoenes , William L. Betts , Thomas J. Bingel , Rafael Martinez
发明人： Gordon Bremer , Chuck Coston , Ed Thoenes , William L. Betts , Thomas J. Bingel , Rafael Martinez
IPC分类号： H04M1/00 , H04M9/00
CPC分类号： H04L25/028 , H04L5/06 , H04L25/03343 , H04M11/062
摘要： Various embodiments are configured to transform characteristics of a communication signal. One embodiment is a method comprising decreasing amplitude of a first detected portion of the communication signal so that the decreased amplitude is in close proximity to a predefined specification; and increasing amplitude of a second portion of the communication signal so that the increased amplitude is in close proximity to the predefined specification, thereby resulting in a transformed communication signal.
摘要翻译：各种实施例被配置为变换通信信号的特性。一个实施例是一种方法，包括减小通信信号的第一检测部分的振幅，使得减小的振幅接近于预定规格; 并且增加通信信号的第二部分的幅度，使得增加的幅度接近预定义的规范，从而导致变换的通信信号。

9. 发明授权

US5280503A Data communication system with data rate throttling 失效
标题翻译：具有数据速率限制的数据通信系统
公开(公告)号：US5280503A
公开(公告)日：1994-01-18
申请号：US820111
申请日：1992-01-13
申请人： William L. Betts , Gordon Bremer
发明人： William L. Betts , Gordon Bremer
IPC分类号： H04L27/34 , H04L23/00
CPC分类号： H04L27/34
摘要： Fractional rate modulation is accomplished by separating incoming data into frames of bits. Each frame in partitioned into bit words of unequal lengths. The words are divided by a modulus to obtain remainders. The remainders are transmitted using, for example, QAM modulation. At the receiving end, the process is reversed. The ratio of baud rate of the system to the incoming bit rate defines the modulus as well as the number of QAM modulation points. A "data rate throttling" technique takes advantage of the capabilities provided by the foregoing to allow the rate at which data is channel mapped and transmitted over a communication channel to be easily varied in small increments.
摘要翻译：分数速率调制是通过将输入数据分成比特帧来完成的。每帧分割成不等长的位字。这些词被模数除以获得余数。余数使用例如QAM调制来发送。在接收端，该过程相反。系统的波特率与输入比特率的比率定义了模数以及QAM调制点的数量。 “数据速率调节”技术利用前述提供的能力来允许通过通信信道将信道映射和传输的速率以小的增量容易地变化。

10. 发明授权

US07289610B2 Digital subscriber line service over loaded loops 失效
标题翻译：数字用户线服务负载循环
公开(公告)号：US07289610B2
公开(公告)日：2007-10-30
申请号：US10435219
申请日：2003-05-08
申请人： Gordon Bremer , William L. Betts , Edward A. Thoenes , Joseph Q. Chapman
发明人： Gordon Bremer , William L. Betts , Edward A. Thoenes , Joseph Q. Chapman
IPC分类号： H04M11/00
CPC分类号： H04L12/66 , H04L5/16
摘要： The preferred embodiments of the present invention generally provide improved communications over a subscriber loop that is loaded with at least one and potentially a plurality of load coils. The preferred embodiments of the present invention will work over loaded subscriber loops that also support a native POTS interface as well as over loaded subscriber loops that are not providing a native POTS interface. Furthermore, although the preferred embodiments of the present invention are intended to address the technical and business problems of service providers delivering digital subscriber line service over loaded loops, the preferred embodiments will also work over unloaded loops. Various duplexing strategies such as, but not limited to, time-division duplexing (TDD), adaptive time-division duplexing (ATDD), four-wire duplexing, and/or extended performance echo cancelled duplexing (EP ECD) provide improved performance on loaded loops that generally offer significant signal attenuation at frequencies above 4 KHz. In addition, such duplexing strategies can start and stop quickly enough to pass various POTS interface signaling generally without creating a significant adverse effect on DSL data communications.
摘要翻译：本发明的优选实施例通常提供加载有至少一个并且潜在地多个负载线圈的用户环路的改进的通信。本发明的优选实施例可以用于也支持本地POTS接口的负载用户环路以及不提供本机POTS接口的过载用户环路。此外，尽管本发明的优选实施例旨在解决在负载环路上提供数字用户线服务的服务提供商的技术和业务问题，但优选实施例也将在无负载环路上工作。诸如但不限于时分双工（TDD），自适应时分双工（ATDD），四线双工和/或扩展性能回波消除双工（EP ECD）的各种双工策略在加载通常在高于4KHz的频率下提供有效信号衰减的环路。此外，这种双工策略可以快速启动和停止，足以通过各种POTS接口信令，而不会对DSL数据通信产生显着的不利影响。

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