公开(公告)号：US20110293230A1

公开(公告)日：2011-12-01

申请号：US13133571

申请日：2008-12-09

申请人： Ben Wells ,  John Sach ,  Martin Hanchard ,  Grant Davidson

发明人： Ben Wells ,  John Sach ,  Martin Hanchard ,  Grant Davidson

IPC分类号： G02B6/44 ,  G02B6/00

CPC分类号： G02B6/4494 ,  G02B6/4405 ,  G02B6/4411 ,  G02B6/4486

摘要： An optical fiber cable includes at least one buffer tube that includes a plurality of water-blocking plugs and an optical fiber. The water-blocking plugs can be spaced along the buffer tubes, substantially filling the cross-sectional space within the buffer tube not already filled by the optical fiber. The water-blocking plugs can provide a stronger bond between the optical fibers and the inner tube. This is reflected by a high normalized pullout force for the optical fiber, such as, above 5.0 N/m. Yet, the resulting fiber optic cable does not suffer from problems associated with a higher pullout force, such as attenuation.

摘要翻译： 光纤电缆包括至少一个包括多个阻水塞和光纤的缓冲管。 阻水塞可以沿着缓冲管间隔开，基本上填充尚未由光纤填充的缓冲管内的横截面空间。 防水塞可以在光纤和内管之间提供更强的粘结。 这通过光纤的高归一化拔出力反映，例如高于5.0N / m。 然而，所得到的光纤电缆不会遭受与较高拔出力（例如衰减）相关联的问题。

公开(公告)号：US08660394B2

公开(公告)日：2014-02-25

申请号：US13133571

申请日：2008-12-09

申请人： Ben Wells ,  John Sach ,  Martin Hanchard ,  Grant Davidson

发明人： Ben Wells ,  John Sach ,  Martin Hanchard ,  Grant Davidson

IPC分类号： G02B6/44

CPC分类号： G02B6/4494 ,  G02B6/4405 ,  G02B6/4411 ,  G02B6/4486

摘要： An optical fiber cable includes at least one buffer tube that includes a plurality of water-blocking plugs and an optical fiber. The water-blocking plugs can be spaced along the buffer tubes, substantially filling the cross-sectional space within the buffer tube not already filled by the optical fiber. The water-blocking plugs can provide a stronger bond between the optical fibers and the inner tube. This is reflected by a high normalized pullout force for the optical fiber, such as, above 5.0 N/m. Yet, the resulting fiber optic cable does not suffer from problems associated with a higher pullout force, such as attenuation.

摘要翻译： 光纤电缆包括至少一个包括多个阻水塞和光纤的缓冲管。 阻水塞可以沿着缓冲管间隔开，基本上填充尚未由光纤填充的缓冲管内的横截面空间。 防水塞可以在光纤和内管之间提供更强的粘结。 这通过光纤的高归一化拔出力反映，例如高于5.0N / m。 然而，所得到的光纤电缆不会遭受与较高拔出力（例如衰减）相关联的问题。

公开(公告)号：US06195487B1

公开(公告)日：2001-02-27

申请号：US09108248

申请日：1998-06-30

申请人： Aaron Anderson ,  Grant Davidson ,  John Sach

发明人： Aaron Anderson ,  Grant Davidson ,  John Sach

IPC分类号： G02B644

CPC分类号： G02B6/4494 ,  G02B6/4416 ,  G02B6/4427

摘要： A composite cable for distributing electrical power to components in an optical fiber network and for transmitting optical signals between optical fiber network components includes at least one layer of insulated electrical conductors arranged in side-by-side relation to provide a layer of conductors of a thickness substantially equal to the thickness of the conductors. The conductors of the at least one layer of conductors are S-Z stranded and surround the optical fibers which are loosely contained in at least one plastic buffer tube to provide desirable structural and operational features to the cable and to an optical fiber network in which the cable can be included.

摘要翻译： 用于将电力分配到光纤网络中的组件并用于在光纤网络部件之间传输光信号的复合电缆包括至少一层并排布置的绝缘电导体层，以提供一层厚度的导体层 基本上等于导体的厚度。 所述至少一层导体的导体是SZ绞合的并且包围光纤，所述光纤松散地容纳在至少一个塑料缓冲管中，以向电缆和光纤网提供期望的结构和操作特征，其中电缆可以 被包括在内。

公开(公告)号：US08392179B2

公开(公告)日：2013-03-05

申请号：US12921752

申请日：2009-03-12

申请人： Rongshan Yu ,  Regunathan Radhakrishnan ,  Robert Andersen ,  Grant Davidson

发明人： Rongshan Yu ,  Regunathan Radhakrishnan ,  Robert Andersen ,  Grant Davidson

IPC分类号： G10L11/06

CPC分类号： G10L19/18 ,  G10L19/093 ,  G10L19/12 ,  G10L2019/0004 ,  G10L2019/0005

摘要： The invention relates to the coding of audio signals that may include both speech-like and non-speech-like signal components. It describes methods and apparatus for code excited linear prediction (CELP) audio encoding and decoding that employ linear predictive coding (LPC) synthesis filters controlled by LPC parameters, a plurality of codebooks each having codevectors, at least one codebook providing an excitation more appropriate for non-speech-like signals and at least one codebook providing an excitation more appropriate for speech-like signals, and a plurality of gain factors, each associated with a codebook. The encoding methods and apparatus select from the codebooks codevectors and/or associated gain factors by minimizing a measure of the difference between the audio signal and a reconstruction of the audio signal derived from the codebook excitations. The decoding methods and apparatus generate a reconstructed output signal from the LPC parameters, codevectors, and gain factors.

摘要翻译： 本发明涉及可以包括语音类和非语音类信号分量的音频信号的编码。 它描述了采用由LPC参数控制的线性预测编码（LPC）合成滤波器的码激励线性预测（CELP）音频编码和解码的方法和装置，每个具有码矢量的多个码本，提供更适合于 非语音类信号和至少一个提供更适合于类似语音的信号的激励的码本，以及多个增益因子，每个与码本相关联。 编码方法和装置通过最小化音频信号与从码本激励导出的音频信号的重建之间的差异的度量来从码本代码矢量和/或相关联的增益因子中选择。 解码方法和装置从LPC参数，代码矢量和增益因子产生重构的输出信号。

公开(公告)号：US4868867A

公开(公告)日：1989-09-19

申请号：US35518

申请日：1987-04-06

申请人： Grant Davidson ,  Allen Gersho

发明人： Grant Davidson ,  Allen Gersho

IPC分类号： G10L19/00 ,  G10L19/10

CPC分类号： G10L19/10 ,  G10L25/06

摘要： A vector excitation coder compresses vectors by using an optimum codebook designed off line, using an initial arbitrary codebook and a set of speech training vectors exploiting codevector sparsity (i.e., by making zero all but a selected number of samples of lowest amplitude in each of N codebook vectors). A fast-search method selects a number N.sub.c of good excitation vectors from the codebook, where N.sub.c is much smaller thaORIGIN OF INVENTIONThe invention described herein was made in the performance of work under a NASA contract, and is subject to the provisions of Public Law 96-517 (35 USC 202) under which the inventors were granted a request to retain title.

摘要翻译： 矢量激励编码器使用初始任意码本和利用码矢量稀疏性的一组语音训练矢量（即，通过使N中的每一个中的所有选定数量的最低幅度的采样数除零之外，通过使用离线设计的最佳码本来压缩向量 码本矢量）。 快速搜索方法从码本中选择Nc个良好的激励矢量，其中Nc远小于N，并且在穷举搜索中仅使用Nc向量来感知加权的输入向量zn与估计之间的最佳匹配 zn从通过长期和短期滤波器处理的码本向量导出，以及感知加权滤波器。 这些级联滤波器的零输入响应被计算，并且在感知加权之后从输入语音矢量sn中减去以产生向量rn。 使用通过计算快速内积的分子并通过用于每个码本向量cj的快速内积计算分母来执行码本搜索操作，计算方程的右侧一次一帧，然后乘法乘法 通过确定N1D2> N2D1来确定N2 / D2是否小于N1 / D1的分子和分母。 如果N2和D2不是在寄存器En和Ed中替换N1和D1。

公开(公告)号：US20110158363A1

公开(公告)日：2011-06-30

申请号：US13060030

申请日：2009-08-24

申请人： Robert L Andersen ,  Grant Davidson

发明人： Robert L Andersen ,  Grant Davidson

IPC分类号： H04B1/10

CPC分类号： H03H21/0012 ,  G10L19/012 ,  H04B3/235

摘要： The application relates to a method for determining at least one updated filter coefficient of an adaptive filter (22) adapted by an LMS algorithm. According to the method, filter coefficients of a first whitening filter (25′) are determined, in particular filter coefficients of an LPC whitening filter. The first whitening filter (25′) generates a filtered signal. A normalization value is determined based on one or more computed values obtained in the course of determining the filter coefficients of the first whitening filter (25′). The normalization value is associated with the energy of the filtered signal. At least one updated filter coefficient of the adaptive filter (22) is determined in dependency on the filtered signal and the normalization value. Preferably, updated filter coefficients for all filter coefficients of the adaptive filter (22) are determined.

摘要翻译： 本申请涉及一种用于确定由LMS算法适应的自适应滤波器（22）的至少一个更新的滤波器系数的方法。 根据该方法，确定第一白化滤波器（25'）的滤波器系数，特别是LPC白化滤波器的滤波器系数。 第一白化滤光器（25'）产生滤波信号。 基于在确定第一白化滤波器（25'）的滤波器系数的过程中获得的一个或多个计算值来确定归一化值。 归一化值与滤波信号的能量相关联。 根据滤波信号和归一化值来确定自适应滤波器（22）的至少一个更新的滤波器系数。 优选地，确定自适应滤波器（22）的所有滤波器系数的更新的滤波器系数。

公开(公告)号：US20050185850A1

公开(公告)日：2005-08-25

申请号：US10783951

申请日：2004-02-19

申请人： Mark Vinton ,  Grant Davidson

发明人： Mark Vinton ,  Grant Davidson

IPC分类号： G06F17/14 ,  G06T9/00 ,  H04N7/26 ,  H04N7/30 ,  G06K9/36

CPC分类号： G06F17/147 ,  G10L19/0212 ,  H04N19/122 ,  H04N19/60

摘要： Analysis and synthesis filter banks such as those used in audio and video coding systems are each implemented by a hybrid transform that comprises a primary transform in cascade with one or more secondary transforms. The primary transforms for the filter banks implement an analysis/synthesis system in which time-domain aliasing artifacts are cancelled. The secondary transforms, which are in cascade with the primary transforms, are applied to blocks of transform coefficients. The length of the blocks is varied to adapt the time resolution of the analysis and synthesis filter banks.

摘要翻译： 分析和合成滤波器组（例如在音频和视频编码系统中使用的滤波器组）各自通过包含与一个或多个次级变换级联的初级变换的混合变换来实现。 滤波器组的主要变换实现了时域混叠伪像被取消的分析/综合系统。 与主变换级联的次级变换被应用于变换系数块。 改变块的长度以适应分析和合成滤波器组的时间分辨率。

公开(公告)号：US20110142247A1

公开(公告)日：2011-06-16

申请号：US13056251

申请日：2009-07-29

申请人： Matthew Fellers ,  Grant Davidson ,  Rongshan Yu ,  Eric Benjamin ,  Kenneth Gundry

发明人： Matthew Fellers ,  Grant Davidson ,  Rongshan Yu ,  Eric Benjamin ,  Kenneth Gundry

IPC分类号： G10K11/16

CPC分类号： H04R3/04 ,  G10K11/178 ,  G10K2210/1081 ,  G10K2210/30232 ,  H04R1/1083 ,  H04R2430/03

摘要： An electroacoustic channel soundfield is altered. An audio signal is applied by an electromechanical transducer to an acoustic space, causing air pressure changes therein. Another audio signal is obtained by a second electromechanical transducer, responsive to air pressure changes in the acoustic space. A transfer function estimate of the electroacoustic channel is established, responsive to the second audio signal and part of the first audio signal. The transfer function estimate is derived to be adaptive to temporal variations in the electroacoustic channel transfer function. Filters are obtained with transfer functions based on the transfer function estimate. Part of the first audio signal is filtered therewith.

摘要翻译： 改变电声通道声场。 音频信号由机电换能器施加到声学空间，导致其中的空气压力变化。 另一个音频信号是通过响应于声学空间中的气压变化的第二机电换能器获得的。 响应于第二音频信号和第一音频信号的一部分，建立电声通道的传递函数估计。 导出传递函数估计是适应于电声通道传递函数中的时间变化。 基于传递函数估计的传递函数获得滤波器。 第一音频信号的一部分被滤波。

公开(公告)号：US20110010168A1

公开(公告)日：2011-01-13

申请号：US12921752

申请日：2009-03-12

申请人： Rongshan Yu ,  Regunathan Radhakrishnan ,  Robert Andersen ,  Grant Davidson

发明人： Rongshan Yu ,  Regunathan Radhakrishnan ,  Robert Andersen ,  Grant Davidson

IPC分类号： G10L19/04

CPC分类号： G10L19/18 ,  G10L19/093 ,  G10L19/12 ,  G10L2019/0004 ,  G10L2019/0005

摘要： The invention relates to the coding of audio signals that may include both speech-like and non-speech-like signal components. It describes methods and apparatus for code excited linear prediction (CELP) audio encoding and decoding that employ linear predictive coding (LPC) synthesis filters controlled by LPC parameters, a plurality of codebooks each having codevectors, at least one codebook providing an excitation more appropriate for non-speech-like signals and at least one codebook providing an excitation more appropriate for speech-like signals, and a plurality of gain factors, each associated with a codebook. The encoding methods and apparatus select from the codebooks codevectors and/or associated gain factors by minimizing a measure of the difference between the audio signal and a reconstruction of the audio signal derived from the codebook excitations. The decoding methods and apparatus generate a reconstructed output signal from the LPC parameters, codevectors, and gain factors.

摘要翻译： 本发明涉及可以包括语音类和非语音类信号分量的音频信号的编码。 它描述了采用由LPC参数控制的线性预测编码（LPC）合成滤波器的码激励线性预测（CELP）音频编码和解码的方法和装置，每个具有码矢量的多个码本，提供更适合于 非语音类信号和至少一个提供更适合于类似语音的信号的激励的码本，以及多个增益因子，每个与码本相关联。 编码方法和装置通过最小化音频信号与从码本激励导出的音频信号的重建之间的差异的度量来从码本代码矢量和/或相关联的增益因子中选择。 解码方法和装置从LPC参数，代码矢量和增益因子产生重构的输出信号。

公开(公告)号：USD281318S

公开(公告)日：1985-11-12

申请号：US414170

申请日：1982-09-02

申请人： Grant Davidson

设计人： Grant Davidson