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1. 发明授权

US06608897B1 Double-talk insensitive NLMS algorithm 有权
标题翻译：双语不敏感的NLMS算法
公开(公告)号：US06608897B1
公开(公告)日：2003-08-19
申请号：US09175881
申请日：1998-10-21
申请人： Gary Q. Jin , Gordon J. Reesor , Thomas Qian
发明人： Gary Q. Jin , Gordon J. Reesor , Thomas Qian
IPC分类号： H04M176
CPC分类号： H04M9/082
摘要： A method of canceling echo signals in a telephone network operating in a double talk mode has been developed. A system for implementing the method is also presented. In the invention the conventional normalized least mean square (NLMS) algorithm for echo cancellers is modified such that echo path changes continue to be tracked even after a double talk condition has been detected. The modified algorithm, known herein as a double-talk normalized least mean square (DNLMS) algorithm adaptively adjusts the convergence rate based on the power difference between the echo signal or the residual signal and the far end signal.
摘要翻译：已经开发了以双通道模式操作的电话网络中消除回波信号的方法。还提出了一种实现该方法的系统。在本发明中，用于回波消除器的常规归一化最小均方（NLMS）算法被修改，使得即使在检测到双重通话条件之后，回波路径改变仍继续被跟踪。经修改的算法，这里称为双方通话归一化最小均方（DNLMS）算法，基于回波信号或残差信号与远端信号之间的功率差自适应地调整收敛速度。

2. 发明授权

US6138244A Timing recovery with minimum jitter movement 失效
标题翻译：具有最小抖动运动的定时恢复
公开(公告)号：US6138244A
公开(公告)日：2000-10-24
申请号：US163248
申请日：1998-09-30
申请人： Gary Q. Jin , Gordon J. Reesor
发明人： Gary Q. Jin , Gordon J. Reesor
IPC分类号： H04L7/00 , H04L7/02 , G06F1/12 , G06F1/04
CPC分类号： H04L7/0062 , H04L7/0083
摘要： A symbol synchronization and timing recovery method for stabilizing jitter in a data receiver is provided. A one tap LMS algorithm is used for a pre-cursor estimate. A dead zone is set around the desired timing location and the local clock in the receiver is updated only if the timing signal is outside of the dead zone.
摘要翻译：提供了一种用于稳定数据接收机中的抖动的符号同步和定时恢复方法。一次性LMS算法用于前置估计。在期望的定时位置周围设置死区，并且只有当定时信号在死区之外时才更新接收器中的本地时钟。

3. 发明授权

US5937009A Sub-band echo canceller using optimum wavelet packets and cross-band cancellation 失效
标题翻译：子带回波消除器使用最佳小波包和交叉带消除
公开(公告)号：US5937009A
公开(公告)日：1999-08-10
申请号：US784849
申请日：1997-01-15
申请人： Kon Max Wong , Qu Jin , Qiang Wu , Phillippe Wu , Gordon J. Reesor
发明人： Kon Max Wong , Qu Jin , Qiang Wu , Phillippe Wu , Gordon J. Reesor
IPC分类号： H04R3/02 , H03H17/02 , H03H21/00 , H04B3/23 , H04L27/00 , H04M1/60 , H04M9/08 , H04L25/34 , H04B3/20 , H04M1/00
CPC分类号： H04M9/082 , H04B3/23 , H04L27/0004
摘要： An echo canceller comprising a first wavelet decomposition block for decomposing a reference signal into a plurality of reference wavelet packets; a second wavelet decomposition block for decomposing an echo signal into a plurality of echo signal packets; an adaptive filter bank for receiving and filtering the reference wavelet packets and in response generating a plurality of filtered output packets replicating the echo signal packets; a plurality of subtracters for receiving and subtracting respective ones of the filtered output packets from the echo signal packets and in response generating and applying a plurality of error signals to the adaptive filter bank for modifying the transfer function of the adaptive filter bank; and a wavelet reconstruction block for receiving and reconstructing the error signals to form a residual signal from which the echo signal has been cancelled. Optimum wavelet filters for the best echo cancellation are provided, as are two wavelet echo cancellation structures.
摘要翻译：一种回波消除器，包括用于将参考信号分解成多个参考小波包的第一小波分解块; 第二小波分解块，用于将回波信号分解成多个回波信号分组; 自适应滤波器组，用于接收和滤波参考小波包，并且响应于产生复制回波信号分组的多个滤波输出分组; 多个减法器，用于从所述回波信号分组中接收和减去所述经滤波的输出分组中的相应的减法器，并且响应于产生并将多个误差信号施加到所述自适应滤波器组以修改所述自适应滤波器组的传递函数; 以及小波重建块，用于接收和重构误差信号以形成已经从其消除了回波信号的残余信号。提供了用于最佳回波消除的最佳小波滤波器，两个小波回声消除结构也是如此。

4. 发明授权

US4694482A Digital tone detector 失效
标题翻译：数字音检测器
公开(公告)号：US4694482A
公开(公告)日：1987-09-15
申请号：US921526
申请日：1986-10-22
申请人： Gordon J. Reesor , Patrick R. Beirne , Zbigniew B. Styrna
发明人： Gordon J. Reesor , Patrick R. Beirne , Zbigniew B. Styrna
IPC分类号： H04Q1/457 , H04M1/24
CPC分类号： H04Q1/4575
摘要： A digital progess tone detector, for connection to a telephone line and a PABX, comprising circuitry for generating one or more reference tones having user definable frequencies and performing single frequency discrete Fourier transforms on one or more signals received from the telephone line at the defined frequencies, and providing an output signal to the PABX in response thereto. The output signal provides an indication of whether or not a predetermined one or more progress tone frequencies have been detected in the received signals. Because the generated reference tone frequencies are user definable, the present invention can be easily adapted for use in various foreign countries having different progress tone frequency requirements. A preferred embodiment of the invention is implemented on a single microcomputer chip in conjunction with peripherals (such as codecs, crosspoint switches, etc.). The progress tone detector is simple, small and inexpensive, thus conforming to the miniaturization and cost efficiency requirements of modern day PABX circuits.
摘要翻译：一种用于连接到电话线路和PABX的数字渐进音检测器，包括用于产生具有用户可定义频率的一个或多个参考音调并且以定义的频率对从电话线接收的一个或多个信号执行单频离散付里叶变换的电路并且响应于此向PABX提供输出信号。输出信号提供在接收到的信号中是否已经检测到预定的一个或多个进行音频率的指示。由于所生成的参考音频率是用户可定义的，因此本发明可以容易地适用于具有不同进度音频要求的各个国家。结合外围设备（如编解码器，交叉点开关等），在单个微型计算机芯片上实现本发明的优选实施例。进度音检测器简单，小巧便宜，符合现代PABX电路的小型化和成本效益要求。

5. 发明申请

US20090154484A1 SCALEABLE VOIP TELEPHONE LINE CIRCUIT 有权
标题翻译：可扩展的电话线路电路
公开(公告)号：US20090154484A1
公开(公告)日：2009-06-18
申请号：US12332563
申请日：2008-12-11
申请人： Gordon J. Reesor , Zaher Baidas , Paul Nicholas
发明人： Gordon J. Reesor , Zaher Baidas , Paul Nicholas
IPC分类号： H04L12/66
CPC分类号： H04M7/0069 , H04L65/1026 , H04M3/005
摘要： A telephone subscriber line device for providing an interface between a legacy telephone circuit based on circuit-switched technology and a packet network has a legacy interface for connection to telephone circuit; a packet interface for connection to a packet network, processing circuitry for converting between legacy telephone signals and packet signals, and a cascadable expansion bus permitting multiple said devices to be connected to a common port on a packet network. Such a device is highly scalable.
摘要翻译：用于在基于电路交换技术的传统电话电路与分组网络之间提供接口的电话用户线路设备具有用于连接到电话电路的传统接口; 用于连接到分组网络的分组接口，用于在传统电话信号和分组信号之间转换的处理电路，以及允许多个所述设备连接到分组网络上的公共端口的级联扩展总线。这样的设备是高度可扩展的。

6. 发明授权

US06661895B1 Zero-delay structure for sub-band echo cancellation 有权
标题翻译：用于子带回波消除的零延迟结构
公开(公告)号：US06661895B1
公开(公告)日：2003-12-09
申请号：US09414413
申请日：1999-10-07
申请人： Qu Jin , Kon Max Wong , Qiang Wu , Philippe Wu , Gordon J. Reesor
发明人： Qu Jin , Kon Max Wong , Qiang Wu , Philippe Wu , Gordon J. Reesor
IPC分类号： H04M908
CPC分类号： H04M9/082
摘要： A zero-delay structure to be used in sub-band echo cancellation systems. In telecommunications, a delay is usually introduced in sub-band decomposition and/or sub-band reconstruction. This invention will help remove this. This structure not only removes the delay but does not sacrifice the performance of the echo canceller. It is to be used in combination with any sub-band-based echo canceller or wavelet echo canceller.
摘要翻译：用于子带回波消除系统的零延迟结构。在电信中，通常在子带分解和/或子带重建中引入延迟。本发明将有助于消除这一点。该结构不仅消除延迟，而且不会牺牲回声消除器的性能。它与任何基于子带的回波消除器或小波回波消除器组合使用。

7. 发明授权

US5991784A Signal processing circuit 失效
标题翻译：信号处理电路
公开(公告)号：US5991784A
公开(公告)日：1999-11-23
申请号：US765205
申请日：1997-04-24
申请人： Gordon J. Reesor
发明人： Gordon J. Reesor
IPC分类号： H03M7/38 , H03M7/00 , H04B14/06 , G06F7/00 , G06F7/44
CPC分类号： H03M7/3046
摘要： A circuit for applying a predetermined algorithm to an input signal, has an input for receiving the input signal, a signal processing device for processing the input signal in accordance with the predetermined algorithm, and a device for outputting the processed signal. The signal processing device incorporates distributed bit-serial logic circuits to implement the predetermined algorithm.
摘要翻译： PCT No.PCT / CA95 / 00400 Sec。 371日期1997年04月24日 102（e）日期1997年4月24日PCT提交1995年7月6日PCT公布。出版物WO96 / 01527 日期1996年1月18日用于对输入信号应用预定算法的电路具有用于接收输入信号的输入端，用于根据预定算法处理输入信号的信号处理装置，以及用于输出处理信号的装置。信号处理装置包括分布式位串行逻辑电路以实现预定算法。

8. 发明授权

US07843954B2 Scaleable VoIP telephone line circuit 有权
标题翻译：可扩展的VoIP电话线路电路
公开(公告)号：US07843954B2
公开(公告)日：2010-11-30
申请号：US12332563
申请日：2008-12-11
申请人： Gordon J. Reesor , Zaher Baidas , Paul Nicholas
发明人： Gordon J. Reesor , Zaher Baidas , Paul Nicholas
IPC分类号： H04L12/66
CPC分类号： H04M7/0069 , H04L65/1026 , H04M3/005
摘要： A telephone subscriber line device for providing an interface between a legacy telephone circuit based on circuit-switched technology and a packet network has a legacy interface for connection to telephone circuit; a packet interface for connection to a packet network, processing circuitry for converting between legacy telephone signals and packet signals, and a cascadable expansion bus permitting multiple said devices to be connected to a common port on a packet network. Such a device is highly scalable.
摘要翻译：用于在基于电路交换技术的传统电话电路与分组网络之间提供接口的电话用户线路设备具有用于连接到电话电路的传统接口; 用于连接到分组网络的分组接口，用于在传统电话信号和分组信号之间转换的处理电路，以及允许多个所述设备连接到分组网络上的公共端口的级联扩展总线。这样的设备是高度可扩展的。

9. 发明授权

US06697423B1 Precursor decision feedback equalizer (PDFE) 失效
标题翻译：前身判决反馈均衡器（PDFE）
公开(公告)号：US06697423B1
公开(公告)日：2004-02-24
申请号：US09685489
申请日：2000-10-10
申请人： Gary Q. Jin , Gordon J. Reesor
发明人： Gary Q. Jin , Gordon J. Reesor
IPC分类号： H03H730
CPC分类号： H04L25/03057 , H04L2025/03363 , H04L2025/0349 , H04L2025/03694
摘要： A decision feedback equalizer is provided which is capable of canceling precursor Inter-Symbol Interference (ISI) even when knowledge of future data is unavailable. A novel DFE algorithm is utilized whereby the detection signal-to-noise ratio (SNR) is increased in two aspects: the precursor contribution is eliminated and the sampling location (relative to the channel response) is positioned at the maximum SNR location. As a result, the loop length for data transmission in a cable can be extended.
摘要翻译：提供了一种判决反馈均衡器，即使在将来数据的知识不可用的情况下，它也能够抵消先前的符号间干扰（ISI）。使用了一种新颖的DFE算法，从而在两个方面增加了检测信噪比（SNR）：前体贡献被消除，并且采样位置（相对于信道响应）位于最大SNR位置。结果，可以延长电缆中数据传输的环路长度。

10. 发明授权

US6122652A Tone and periodical signal detection 有权
标题翻译：音频和周期信号检测
公开(公告)号：US6122652A
公开(公告)日：2000-09-19
申请号：US161434
申请日：1998-09-24
申请人： Gary Q. Jin , Gordon J. Reesor
发明人： Gary Q. Jin , Gordon J. Reesor
IPC分类号： H04Q1/444 , H04Q1/45 , G06F17/10
CPC分类号： H04Q1/444 , H04Q1/45
摘要： Algorithms for quickly and efficiently detecting a periodic signal such as a DTMF signal in a telephone system are described. The algorithms, implemented in a tone detector, detect the periodicity of the input data and do not require an estimation of the tone frequency.
摘要翻译：描述用于快速有效地检测诸如电话系统中的DTMF信号的周期性信号的算法。在音调检测器中实现的算法检测输入数据的周期性，并且不需要对音调频率的估计。

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