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1. 发明授权

US6104726A Simultaneous transfer of voice and data information using multi-rate vocoder and bit control protocol 失效
标题翻译：使用多速率声码器和位控制协议同时传输语音和数据信息
公开(公告)号：US6104726A
公开(公告)日：2000-08-15
申请号：US829074
申请日：1997-03-31
申请人： William Chunhung Yip , Steven Peter Allen , James Brian Piket
发明人： William Chunhung Yip , Steven Peter Allen , James Brian Piket
IPC分类号： H04J3/16 , H04L29/06 , H04W28/06 , H04W28/22 , H04W72/12 , H04W88/06 , H04J3/22
CPC分类号： H04L29/06027 , H04J3/1688 , H04W28/06 , H04W28/22 , H04W88/06
摘要： A technique and method that efficiently and simultaneously transfers both voice and data information over a single communications link (11). The technique and method utilizes a multi-rate vocoder (12) for providing voice information at a plurality of different rates. Accordingly, the vocoder may be dynamically adjusted during transfer of information to meet channel bandwidth requirements. The technique and method also utilizes a bit-control protocol for inserting voice information within a stream of data information by the use of inserting flags having predetermined bitstreams. Accordingly, voice information is dynamically inserted into an existing bitstream of data information such that voice information is transferred only upon demand and when needed. This prevents the transfer of useless information, such as voice information when a speaker is silent and, thus, allows for very efficient utilization of system bandwidth.
摘要翻译：一种通过单个通信链路（11）有效并同时传送语音和数据信息的技术和方法。该技术和方法利用多速率声码器（12）来提供多种不同速率的语音信息。因此，可以在传送信息期间动态地调整声码器以满足信道带宽要求。该技术和方法还利用位控制协议，通过使用插入具有预定比特流的标志来将语音信息插入数据信息流内。因此，语音信息被动态地插入到数据信息的现有比特流中，使得语音信息仅在需要时和需要时传送。这防止了传播无用信息，例如当扬声器静音时的语音信息，因此允许非常有效地利用系统带宽。

2. 发明授权

US06707912B2 Method and apparatus for setting a step size for an adaptive filter coefficient of an echo canceller 有权
标题翻译：用于设置回波消除器的自适应滤波器系数的步长的方法和装置
公开(公告)号：US06707912B2
公开(公告)日：2004-03-16
申请号：US09266280
申请日：1999-03-11
申请人： James Allen Stephens , James Brian Piket , Ernest Pei-Ching Chen , William Chunhung Yip
发明人： James Allen Stephens , James Brian Piket , Ernest Pei-Ching Chen , William Chunhung Yip
IPC分类号： H04M908
CPC分类号： H04M9/082 , H03H2021/0078
摘要： The step sizes for tap positions of an adaptive filter (124) in an echo canceller (125) for canceling an echo signal are individually selected based upon a profile of the echo environment. A training signal (112) is injected into the echo canceller and to the echo path during a training interval, or period. The adaptive filter profiles the echo path during the training interval. Respective step sizes &agr;[k] for the tap positions are generated as a function of the echo profile so generated.
摘要翻译：基于回波环境的轮廓，单独地选择用于消除回波信号的回波消除器（125）中的自适应滤波器（124）的抽头位置的步长。训练信号（112）在训练间隔或周期期间被注入回波消除器和回波路径。自适应滤波器在训练间隔期间对回波路径进行轮廓。作为抽头位置的相应步长α[k]被生成为所生成的回波曲线的函数。

3. 发明授权

US5721782A Partitioned echo canceler utilizing decimation echo location 失效
标题翻译：分频回波消除器利用抽取回波位置
公开(公告)号：US5721782A
公开(公告)日：1998-02-24
申请号：US621788
申请日：1996-03-25
申请人： James Brian Piket , Daryl Leslie Bergstrom , William Chunhung Yip
发明人： James Brian Piket , Daryl Leslie Bergstrom , William Chunhung Yip
IPC分类号： H04B3/23 , H04B3/20
CPC分类号： H04B3/23
摘要： The present invention includes an adaptive filter (40) for use within an echo canceler. The adaptive filter operates in a first mode for performing Decimation Echo Location (DEL). During the DEL mode, high energy regions occurring within the echo impulse response are identified over an extended time range through signal decimation. The adaptive filter then operates in a second mode for performing Partitioned Echo Cancellation (PEC). During the PEC mode, filter coefficients not associated with these high energy regions are modeled as zero while the identified high energy region filter coefficients of the impulse response are partitioned and convolution of the reference signal, x(n), with the impulse response signal, h(n), is accomplished by performing convolution on only those samples in the reference signal memory block (50) that correspond to respective high energy region filter coefficients in the adaptive filter block (56). Accordingly, the adaptive filter of the present invention extends the tail length time range of conventional adaptive filters while not increasing the number of required filter coefficient taps and substantially reduces the number of convolution multiply accumulate operations and coefficient update calculations required for performing echo cancellation over the extended time range.
摘要翻译：本发明包括在回波消除器内使用的自适应滤波器（40）。自适应滤波器以用于执行抽取回波位置（DEL）的第一模式操作。在DEL模式期间，通过信号抽取在延长的时间范围内识别在回波脉冲响应内发生的高能量区域。然后，自适应滤波器在用于执行分区回波消除（PEC）的第二模式中操作。在PEC模式期间，与这些高能量区域不相关的滤波器系数被建模为零，而脉冲响应的识别的高能量区域滤波器系数被分割并且参考信号x（n）与脉冲响应信号的卷积，通过对与自适应滤波器块（56）中的各个高能量区域滤波器系数相对应的参考信号存储块（50）中的那些样本执行卷积来实现h（n）。因此，本发明的自适应滤波器扩展了常规自适应滤波器的尾长度时间范围，同时不增加所需滤波器系数抽头的数量，并且基本上减少了卷积乘法运算的数量和在延长时间范围

4. 发明授权

US06415029B1 Echo canceler and double-talk detector for use in a communications unit 有权
标题翻译：回波消除器和双通话检测器用于通信单元
公开(公告)号：US06415029B1
公开(公告)日：2002-07-02
申请号：US09317575
申请日：1999-05-24
申请人： James Brian Piket , Lance Foreman Amos , Holly Elizabeth Hall , William Chunhung Yip
发明人： James Brian Piket , Lance Foreman Amos , Holly Elizabeth Hall , William Chunhung Yip
IPC分类号： H04M908
CPC分类号： H04B3/234
摘要： A hands-free communications unit employs a downlink peak power memory element (150, FIG. 1), a downlink voice activity detector (140), and an uplink voice activity detector (180). The downlink voice activity detector (140) evaluates the incoming signal to determine if the signal includes voice. In a similar manner, the uplink voice activity detector (180) determines if an outgoing signal includes voice. In the event that the incoming signal includes voice and the energy of the outgoing signal exceeds a threshold calculated from the peak power of the incoming signal, the uplink voice activity detector (180) indicates that a double-talk condition exists (350, FIG. 3). In the event that the incoming signal does not include voice, the uplink voice activity detector (180) compares the uplink signal to a voice threshold above a noise floor to determine if the outgoing signal includes voice.
摘要翻译：免提通信单元采用下行链路峰值功率存储元件（150，图1），下行链路语音活动检测器（140）和上行链路语音活动检测器（180）。下行语音活动检测器（140）评估输入信号以确定该信号是否包括语音。以类似的方式，上行语音活动检测器（180）确定传出信号是否包括语音。在输入信号包括语音并且输出信号的能量超过从输入信号的峰值功率计算出的阈值的情况下，上行语音活动检测器（180）指示存在双方通话条件（图3B）。 3）。在输入信号不包括语音的情况下，上行语音活动检测器（180）将上行链路信号与噪声本底之上的语音阈值进行比较，以确定输出信号是否包括语音。

5. 发明授权

US5926756A Method and system for programming a cellular phone 失效
标题翻译：蜂窝电话编程方法和系统
公开(公告)号：US5926756A
公开(公告)日：1999-07-20
申请号：US703270
申请日：1996-08-26
申请人： Gerald Vincent Piosenka , Marc Alan Newman , William Chunhung Yip , James Brian Piket
发明人： Gerald Vincent Piosenka , Marc Alan Newman , William Chunhung Yip , James Brian Piket
IPC分类号： H04B1/38 , H04M1/2745 , H04M1/725 , H04M11/00 , H04W8/24 , H04W92/18 , H04Q7/30
CPC分类号： H04W8/245 , H04M1/72525 , H04M1/2745 , H04W92/18
摘要： A method and system simplifies and accomplishes the programming of a PED (12), such as a cellular telephone (22), via the use of a personal computer (PC). The present invention includes software (52, 54) within the PC (14) for providing a graphical user interface (GUI) to the user for ease and simplicity of selecting various programming features and settings associated with the cellular telephone to be programmed. The software further includes a translator (56) for translating these user selected features/settings into specific key depresses to be sent to the cellular telephone, via software and hardware interfaces (58, 18, 20), for accomplishing the programming of such features/settings. Additionally, the software includes the capability to monitor the data being displayed on the cellular telephone because such data may be required to accomplish various programming features.
摘要翻译：方法和系统通过使用个人计算机（PC）来简化和完成诸如蜂窝电话（22）的PED（12）的编程。本发明包括PC（14）内的用于向用户提供图形用户界面（GUI）的软件（52,54），以方便和简单地选择与待编程的蜂窝电话相关联的各种编程特征和设置。该软件还包括一个翻译器（56），用于经由软件和硬件接口（58,18,20）将这些用户所选择的特征/设置转换成要被发送到蜂窝电话的特定按键，用于完成这些特征/ 设置。此外，该软件包括监视在蜂窝电话上显示的数据的能力，因为可能需要这样的数据来完成各种编程特征。

6. 发明授权

US5856970A Multi-channel echo cancellation method and apparatus 失效
标题翻译：多声道回波消除方法及装置
公开(公告)号：US5856970A
公开(公告)日：1999-01-05
申请号：US692353
申请日：1996-08-05
申请人： Donald Fong Gee , Bruce Edward Geren , James Brian Piket , William Chunhung Yip
发明人： Donald Fong Gee , Bruce Edward Geren , James Brian Piket , William Chunhung Yip
IPC分类号： H03H21/00 , H04B7/005 , H04B3/23
CPC分类号： H04B7/005 , H03H21/0012
摘要： An echo canceller (500) utilizes a central control unit (502) (CCU) and at least one convolution processing unit (504) (CPU) to perform echo cancellation on one or more channels. A method for operating the echo canceller (500) controls reading (706) one or more reference signals (510) and reflected signals (512), convolution and adaptive processing (11, 21, 31, 41) using the CPUs (504), and post-processing (702) to produce one or more echo cancelled signals (514). Convolution and adaptive processing for multiple channels can be performed simultaneously (11, 31) by multiple CPUs (504), or in a time-multiplexed manner (11, 21) by a single CPU (504), or a combination (11, 21, 31, 41) of simultaneous and time-multiplexing by multiple CPUs (504). CCU (502) is able to perform processing functions (702-730) while CPUs (504) perform convolution and adaptive processing (11, 21, 31, 41).
摘要翻译：回声消除器（500）利用中央控制单元（502）（CCU）和至少一个卷积处理单元（CPU）来在一个或多个通道上执行回波消除。用于操作回波消除器（500）的方法使用CPU（504）控制读取（706）一个或多个参考信号（510）和反射信号（512），卷积和自适应处理（11,21,31,41）和后处理（702）以产生一个或多个回波消除信号（514）。多个通道的卷积和自适应处理可以由多个CPU（504）或者以单个CPU（504）或组合（11,21）的时间复用方式（11,21）同时执行（11,31），31,41）由多个CPU同时和时间复用（504）。 CCU（502）能够执行处理功能（702-730），而CPU（504）执行卷积和自适应处理（11,21,31,41）。

7. 发明授权

US5815020A Balance differential receiver 失效
标题翻译：平衡差动接收器
公开(公告)号：US5815020A
公开(公告)日：1998-09-29
申请号：US718733
申请日：1996-09-24
申请人： Steven Peter Allen , William Chunhung Yip
发明人： Steven Peter Allen , William Chunhung Yip
IPC分类号： G06K7/00 , G06K19/07 , H03H11/16
CPC分类号： G06K7/0008 , G06K19/0723
摘要： A quadrant detector circuit (400) has a comparator (442) having a pair of inputs (438, 440). A first (438) of the pair of inputs (438, 440) is coupled to an in-phase signal (434) and a second (440) of the pair of inputs (438, 440) is coupled to a quadrature phase signal (436). A sample counter (448) has a reset (446) coupled to an output (444) of the comparator (442). A controllable switch (456) has a selection input (454) coupled to an output (452) of the sample counter (448). The controllable switch (456) is capable of switching between a local oscillator signal (458) and an inverse local oscillator signal (460).
摘要翻译：象限检测器电路（400）具有具有一对输入（438,440）的比较器（442）。一对输入（438,440）中的第一（438）耦合到同相信号（434），并且该对输入（438,440）中的第二（440）耦合到正交相位信号 436）。采样计数器（448）具有耦合到比较器（442）的输出（444）的复位（446）。可控开关（456）具有耦合到采样计数器（448）的输出（452）的选择输入（454）。可控开关（456）能够在本地振荡器信号（458）和反向本地振荡器信号（460）之间切换。

8. 发明授权

US06658112B1 Voice decoder and method for detecting channel errors using spectral energy evolution 失效
标题翻译：语音解码器和使用频谱能量演化来检测信道误差的方法
公开(公告)号：US06658112B1
公开(公告)日：2003-12-02
申请号：US09369463
申请日：1999-08-06
申请人： David L. Barron , William Chunhung Yip , Paul Lopez Kennedy
发明人： David L. Barron , William Chunhung Yip , Paul Lopez Kennedy
IPC分类号： H04L900
CPC分类号： G10L19/005
摘要： A voice decoder detects channel errors and loss of cryptographic synchronization using the change in spectral energy between sequential frames. The change in energy between frames is determined between corresponding LSP's of said successive frames and summed together. A running average of the change in energy for a predetermined number of frames is maintained. Current voice frames are eliminated based on the difference between the change in energy associated with the current frame and the running average. Accordingly, offensive audio associated with such channel errors or cryptographic synchronization loss is eliminated.
摘要翻译：语音解码器使用顺序帧之间的频谱能量的变化来检测信道错误和密码同步的丢失。在所述连续帧的相应LSP之间确定帧之间的能量变化并且相加在一起。维持预定数量的帧的能量变化的平均运行。基于与当前帧相关联的能量变化与运行平均值之间的差异来消除当前语音帧。因此，消除了与这种信道错误或密码同步丢失相关联的令人反感的音频。

9. 发明授权

US06928409B2 Speech recognition using polynomial expansion and hidden markov models 失效
标题翻译：使用多项式扩展和隐马尔可夫模型的语音识别
公开(公告)号：US06928409B2
公开(公告)日：2005-08-09
申请号：US09871063
申请日：2001-05-31
申请人： David L. Barron , William Chunhung Yip
发明人： David L. Barron , William Chunhung Yip
IPC分类号： G10L15/02 , G10L15/14
CPC分类号： G10L15/142 , G10L15/02 , G10L25/27
摘要： A speech recognition system (10) having a sampler block (12) and a feature extractor block (14) for extracting time domain and spectral domain parameters from a spoken input speech into a feature vector. A polynomial expansion block (16) generates polynomial coefficients from the feature vector. A correlator block (20), a sequence vector block (22), an HMM table (24) and a Viterbi block (26) perform the actual speech recognition based on the speech units stored in a speech unit table (18) and the HMM word models stored in the HMM table (24). The HMM word model that produces the highest probability is determined to be the word that was spoken.
摘要翻译：具有采样器块（12）和特征提取器块（14）的语音识别系统（10），用于将时域和频域参数从口语输入语音提取到特征向量中。多项式展开块（16）从特征向量生成多项式系数。相关器块（20），序列向量块（22），HMM表（24）和维特比块（26）根据存储在语音单元表（18）和HMM中的语音单元执行实际语音识别存储在HMM表中的单词模型（24）。产生最高概率的HMM字模型被确定为所说的单词。

10. 发明授权

US5751718A Simultaneous transfer of voice and data information using multi-rate vocoder and byte control protocol 失效
标题翻译：使用多速率声码器和字节控制协议同时传输语音和数据信息
公开(公告)号：US5751718A
公开(公告)日：1998-05-12
申请号：US603974
申请日：1996-02-20
申请人： William Chunhung Yip , David T. Gustafson
发明人： William Chunhung Yip , David T. Gustafson
IPC分类号： H04J3/07 , H04J3/12 , H04J3/16 , H04M11/06 , H04J3/22
CPC分类号： H04M11/062 , H04J3/07 , H04J3/12 , H04J3/1688 , H04M11/06 , H04M11/064
摘要： A technique and method that efficiently and simultaneously transfers both voice and data information over a single communications link (11). The technique and method utilizes a multi-rate vocoder (12) for providing voice information at a plurality of different rates. Accordingly, the vocoder may be dynamically adjusted during transfer of information to meet channel bandwidth requirements. The technique and method also utilizes a byte-control protocol for inserting voice information within a stream of data information by the use of a data link escape (DLE) byte command (34). Accordingly, voice information is dynamically inserted into an existing stream of data information such that voice information is transferred only upon demand and when needed. This prevents the transfer of useless information, such as voice information when a speaker is silent and, thus, allows for very efficient utilization of system bandwidth.
摘要翻译：一种通过单个通信链路（11）有效并同时传送语音和数据信息的技术和方法。该技术和方法利用多速率声码器（12）来提供多种不同速率的语音信息。因此，可以在传送信息期间动态地调整声码器以满足信道带宽要求。该技术和方法还利用字节控制协议，通过使用数据链路转义（DLE）字节命令（34）将数据信息流插入语音信息。因此，语音信息被动态地插入到现有的数据信息流中，使得语音信息仅在需要时和需要时被传送。这防止了传播无用信息，例如当扬声器静音时的语音信息，因此允许非常有效地利用系统带宽。

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