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1. 发明授权

US06662154B2 Method and system for information signal coding using combinatorial and huffman codes 有权
标题翻译：使用组合和huffman码的信息信号编码的方法和系统
公开(公告)号：US06662154B2
公开(公告)日：2003-12-09
申请号：US10015871
申请日：2001-12-12
申请人： Udar Mittal , Edgardo Manuel Cruz-Zeno , James Patrick Ashley
发明人： Udar Mittal , Edgardo Manuel Cruz-Zeno , James Patrick Ashley
IPC分类号： G10L1910
CPC分类号： G06T9/005 , G10L19/10
摘要： The invention provides a method of coding an information signal. An information signal is represented by a sequence of pulses. A plurality of pulse parameters are determined based on the sequence of pulses including a non-zero pulse parameter corresponding to a number of non-zero pulse positions in the sequence of pulses. The non-zero pulse parameter is coded using a variable-length codeword.
摘要翻译：本发明提供一种编码信息信号的方法。信息信号由脉冲序列表示。基于脉冲序列确定多个脉冲参数，脉冲序列包括对应于脉冲序列中的非零脉冲位置数量的非零脉冲参数。非零脉冲参数使用可变长度码字进行编码。

2. 发明授权

US06236960B1 Factorial packing method and apparatus for information coding 有权
标题翻译：信息编码的因子包装方法和装置
公开(公告)号：US06236960B1
公开(公告)日：2001-05-22
申请号：US09370057
申请日：1999-08-06
申请人： Weimin Peng , Edgardo Manuel Cruz Zeno , James Patrick Ashley
发明人： Weimin Peng , Edgardo Manuel Cruz Zeno , James Patrick Ashley
IPC分类号： G10L2104
CPC分类号： G10L19/10
摘要： An improved speech coder takes advantage of the fact that any given pulse combination can be uniquely described by the following four properties: number of degenerate pulses, signs of pulses, positions of pulses, and pulse magnitudes. In accordance with the invention, a four stage iterative classification of the pulse combinations, where each stage groups the pulse combinations by one of these four properties, is performed. The process starts with the number of pulses, then determines the total number of possible sign combinations, pulse position combinations, and pulse magnitude combinations. This flexibility allows for the sign combinations to be grouped in the last stage. Since the number of sign combinations is always a power of two, leaving the sign combinations for last along with appropriately ordering the elements in the previous three stages allows the signs to be coded by independent bits, in turn allowing for error protection of those bits.
摘要翻译：改进的语音编码器利用以下事实：任何给定的脉冲组合可以通过以下四个特性唯一描述：简并脉冲数，脉冲符号，脉冲位置和脉冲幅度。根据本发明，执行脉冲组合的四阶段迭代分类，其中每个阶段通过这四个属性之一来组合脉冲组合。该过程以脉冲数开始，然后确定可能的符号组合的总数，脉冲位置组合和脉冲幅度组合。这种灵活性允许在最后阶段将符号组合分组。由于符号组合的数量总是2的幂，所以最后留下符号组合以及前三个阶段中的元素的适当排序允许符号被独立的位编码，从而允许这些位的错误保护。

3. 发明授权

US06366880B1 Method and apparatus for suppressing acoustic background noise in a communication system by equaliztion of pre-and post-comb-filtered subband spectral energies 有权
标题翻译：通过前后梳状滤波的子带频谱能量的均衡来抑制通信系统中的声学背景噪声的方法和装置
公开(公告)号：US06366880B1
公开(公告)日：2002-04-02
申请号：US09451074
申请日：1999-11-30
申请人： James Patrick Ashley
发明人： James Patrick Ashley
IPC分类号： G10L2102
CPC分类号： G10L21/0208
摘要： A noise suppression system implemented in communication system provides an improved level of quality during severe signal-to-noise ratio (SNR) conditions. The noise suppression system, inter alia, incorporates a frequency domain comb-filtering (289) technique which supplements a traditional spectral noise suppression method. The invention includes a real cepstrum generator (285) for an input signal (285) G(k) to produce a likely voiced speech pitch lag component and converting a result to frequency domain to obtain a comb-filter function (290) C(k), applying input signal (291) G(k) to comb-filter function (290) C(k), and equalizing the energies of the corresponding pre and post filtered subbands, to produce a signal (293) G″(k) to be used for noise suppression. This prevents high frequency components from being unnecessarily attenuated, thereby reducing muffling effects of prior art comb-filters.
摘要翻译：在通信系统中实现的噪声抑制系统在严重的信噪比（SNR）条件下提供了改善的质量水平。噪声抑制系统尤其包含频域梳状滤波（289）技术，其补充传统的频谱噪声抑制方法。本发明包括用于输出信号（285）G（k）的真实倒谱发生器（285），以产生可能的有声语音音调滞后分量并将结果转换到频域以获得梳状滤波器函数（290）C（k ），将输入信号（291）G（k）应用于梳状滤波器函数（290）C（k），并且对相应的前和后滤波后的子带的能量进行均衡，以产生信号（293）G“ ）用于噪声抑制。这防止高频分量被不必要地衰减，从而减少现有技术梳状滤波器的消音效果。

4. 发明授权

US06415252B1 Method and apparatus for coding and decoding speech 失效
标题翻译：用于语音编码和解码的方法和装置
公开(公告)号：US06415252B1
公开(公告)日：2002-07-02
申请号：US09086396
申请日：1998-05-28
申请人： Weimin Peng , James Patrick Ashley
发明人： Weimin Peng , James Patrick Ashley
IPC分类号： G10L1106
CPC分类号： G10L19/04 , G10L25/93 , G10L2019/0004
摘要： Bits are allocated to short-term repetition information for unvoiced input signals. Stated differently, more bits are allocated for pitch information during unvoiced input speech than in the prior art. The improved method and apparatus in an encoder (300) and decoder (700) result in improved consistency of amplitude pulses compared to prior art methods which indicates improved stability due to increased search resolution. Also, the improved method and apparatus result in higher energy compared to prior art methods which indicates that the synthesized waveform matches the target waveform more closely, resulting in a higher fixed codebook (FCB) gain.
摘要翻译：位被分配给无声输入信号的短期重复信息。换句话说，在清音输入语音中比现有技术更多的比特被分配用于音调信息。与现有技术方法相比，编码器（300）和解码器（700）中改进的方法和装置导致振幅脉冲的一致性提高，这表明由于增加的搜索分辨率而提高了稳定性。此外，与现有技术方法相比，改进的方法和装置导致更高的能量，这表明合成波形更加紧密地匹配目标波形，导致更高的固定码本（FCB）增益。

5. 发明授权

US6134232A Method and apparatus for providing a multi-party speech connection for use in a wireless communication system 失效
标题翻译：用于提供在无线通信系统中使用的多方语音连接的方法和装置
公开(公告)号：US6134232A
公开(公告)日：2000-10-17
申请号：US885234
申请日：1997-06-30
申请人： James Patrick Ashley , Lee Michael Proctor
发明人： James Patrick Ashley , Lee Michael Proctor
IPC分类号： H04L12/18 , H04B7/26 , H04M3/56 , H04Q11/00 , H04W4/00 , H04J3/22
CPC分类号： H04M3/561 , H04M2203/1091 , H04M2207/18 , H04W4/00
摘要： An apparatus (200) for providing a multi-party speech connection for use in a wireless communication system (10). The apparatus (200) comprises a first speech encoder (202) producing a first encoded speech signal, a second speech encoder (20) producing a second encoded speech signal, a conference circuit (22), and a speech decoder (208) responsive to the conference circuit (22). The conference circuit (22) receives the first and second speech encoded signals and produces a multiplexed encoded speech signal. The speech decoder (208) receives the multiplexed encoded speech signal and produces a decoded speech signal.
摘要翻译：一种用于提供在无线通信系统（10）中使用的多方语音连接的装置（200）。该设备（200）包括产生第一编码语音信号的第一语音编码器（202），产生第二编码语音信号的第二语音编码器（20），会议电路（22）和响应于会议电路（22）。会议电路（22）接收第一和第二语音编码信号并产生复用的编码语音信号。语音解码器（208）接收多路复用的编码语音信号并产生解码语音信号。

6. 发明授权

US07283956B2 Noise suppression 有权
标题翻译：噪声抑制
公开(公告)号：US07283956B2
公开(公告)日：2007-10-16
申请号：US10245963
申请日：2002-09-18
申请人： James Patrick Ashley , Tenkasi Vaideeswaran Ramabadran , Michael Joseph McLaughlin
发明人： James Patrick Ashley , Tenkasi Vaideeswaran Ramabadran , Michael Joseph McLaughlin
IPC分类号： G10L21/00 , G10L21/02
CPC分类号： H04B1/1027
摘要： A method and apparatus for noise suppression is described herein. The channel gain is controlled based on a degree of variability of the background noise. The noise variability estimate is used in conjunction with a variable attenuation concept to produce a family of gain curves that are adaptively suited for a variety of combinations of long-term peak SNR and noise variability. More specifically, a measure of the variability of the background noise is used to provide an optimized threshold that reduces the occurrence of non-stationary background noise entering into the transition region of the gain curve.
摘要翻译：本文描述了用于噪声抑制的方法和装置。基于背景噪声的变化程度控制信道增益。噪声可变性估计与可变衰减概念一起使用，以产生适应于长期峰值SNR和噪声变异性的各种组合的增益曲线族。更具体地，使用背景噪声的可变性的度量来提供优化的阈值，其减少进入增益曲线的过渡区域的非平稳背景噪声的发生。

7. 发明授权

US6070089A Method and apparatus for control of vocoder bypass utilizing inband signaling 有权
标题翻译：利用带内信号控制声码器旁路的方法和装置
公开(公告)号：US6070089A
公开(公告)日：2000-05-30
申请号：US229230
申请日：1999-01-12
申请人： John Douglas Brophy , James Patrick Ashley , Lee Michael Proctor , Krsman Martinovich
发明人： John Douglas Brophy , James Patrick Ashley , Lee Michael Proctor , Krsman Martinovich
IPC分类号： H04B7/26 , H04M3/00 , H04M7/00 , H04Q11/04 , H04W88/18 , H04Q7/00
CPC分类号： H04W88/181
摘要： Vocoder bypass is provided using a combination of out-of-band and in-band signaling. In preferred embodiments of the present invention, two signaling channels are arranged for transmission within the compressed speech. Each of the signaling channels are communicated at a preferred rate to permit fast, reliable detection of conditions indicating vocoder bypass mode of operation and to synchronize and communicate compressed speech in a vocoder bypass mode of operation.
摘要翻译：使用带外和带内信令的组合来提供声码器旁路。在本发明的优选实施例中，两个信令信道被布置用于在压缩语音内传输。以优选的速率传送每个信令信道，以允许快速，可靠地检测指示声码器旁路操作模式的条件，并且以声码器旁路操作模式同步和通信压缩语音。

8. 发明授权

US06188979B1 Method and apparatus for estimating the fundamental frequency of a signal 失效
标题翻译：用于估计信号的基频的方法和装置
公开(公告)号：US06188979B1
公开(公告)日：2001-02-13
申请号：US09086509
申请日：1998-05-28
申请人： James Patrick Ashley
发明人： James Patrick Ashley
IPC分类号： G10L1914
CPC分类号： G10L25/90 , G10L19/09
摘要： A method and apparatus for improved pitch period (&tgr;) estimation in a compression system is disclosed. The system uses original estimates of integer lag (&tgr;0) and open-loop prediction gain (&bgr;ol) as input to an adaptive filter parameter initialization block (304) which supplies inputs to a plurality of adaptive filter elements (306-308). Adaptive filter elements (306-308) provide information regarding the harmonics of the residual signal (&egr;(n)) to an adaptive filter parameter analysis block (310). Adaptive filter parameter analysis block (310) estimates the fundamental frequency of the residual signal based on the analysis of the harmonics and outputs a pitch period (&tgr;) for eventual use in a delay contour computation.
摘要翻译：公开了一种用于改进压缩系统中的音调周期（＆tgr）估计的方法和装置。系统使用整数滞后（＆tgr; 0）的原始估计和开环预测增益（βOL）作为向多个自适应滤波器元件（306-308）提供输入的自适应滤波器参数初始化块（304）的输入。自适应滤波器元件（306-308）将关于残余信号（epsi（n））的谐波的信息提供给自适应滤波器参数分析块（310）。自适应滤波器参数分析块（310）基于谐波分析估计残余信号的基频，并输出用于延迟轮廓计算中最终使用的音调周期（＆tgr）。

9. 发明授权

US06141638A Method and apparatus for coding an information signal 失效
标题翻译：用于对信息信号进行编码的方法和装置
公开(公告)号：US06141638A
公开(公告)日：2000-10-31
申请号：US86149
申请日：1998-05-28
申请人： Weimin Peng , James Patrick Ashley
发明人： Weimin Peng , James Patrick Ashley
IPC分类号： G10L19/00 , G10L19/10 , G10L19/14 , G10L9/00
CPC分类号： G10L19/18 , G10L19/10
摘要： A speech coder (400) for coding an information signal varies the codebook configuration based on parameters inherent in the information signal. The speech coder (400) requires no additional overhead for sending of mode parameters while allowing subframe resolution. The configurations vary not only for voicing level, but also for pitch period since different physiological traits yield different codebook configurations. A dispersion matrix (406) within the speech coder (400) facilitates a codebook search which is performed on vectors whose length can be less than a subframe length. Additionally, use of the dispersion matrix (406) allows the addition of random events for very slightly voiced speech which incurs little computational overhead but produces a rich excitation.
摘要翻译：用于编码信息信号的语音编码器（400）根据信息信号中固有的参数来改变码本配置。语音编码器（400）不需要用于发送模式参数的额外开销，同时允许子帧分辨率。这些配置不仅对于发声水平而言也是变化的，而且对于音调周期也是不同的，因为不同的生理特征产生不同的码本配置。语音编码器（400）内的分散矩阵（406）便于对长度可以小于子帧长度的矢量执行的码本搜索。此外，使用色散矩阵（406）允许为非常轻微的语音语音添加随机事件，这引起很少的计算开销，但产生了丰富的激励。

10. 发明授权

US6091969A Method and apparatus for inband signaling control of vocoder bypass 有权
标题翻译：用于声码器旁路的带内信令控制的方法和装置
公开(公告)号：US6091969A
公开(公告)日：2000-07-18
申请号：US138183
申请日：1998-08-21
申请人： John Douglas Brophy , James Patrick Ashley , Lee Michael Proctor
发明人： John Douglas Brophy , James Patrick Ashley , Lee Michael Proctor
IPC分类号： H04B7/26 , H04M3/00 , H04M7/00 , H04Q11/04 , H04W88/18 , H04Q7/00
CPC分类号： H04W88/181
摘要： Vocoder bypass is provided using in-band signaling. In preferred embodiments of the present invention, three signaling channels are arranged for transmission within the compressed speech. Each of the signaling channels are communicated at a preferred rate to permit fast, reliable detection of conditions indicating vocoder bypass mode of operation, to negotiate suitable vocoder type if necessary, and to synchronize and communicate compressed speech in a vocoder bypass mode of operation.
摘要翻译：使用带内信令提供声码器旁路。在本发明的优选实施例中，三个信令信道被布置用于在压缩语音内传输。以优选的速率传送每个信令信道，以允许快速，可靠地检测指示声码器旁路操作模式的条件，如果需要协商合适的声码器类型，以及在声码器旁路操作模式下同步和通信压缩语音。

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