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公开(公告)号：US07447722B2
公开(公告)日：2008-11-04
申请号：US10492801
申请日：2002-11-11
IPC分类号： G06F17/10
CPC分类号： G06F17/15
摘要： A method for applying a computation utilizing a processor (112) capable of accessing an on-chip memory (114) and data from an off-chip source (116), the method comprising the iterative steps of retrieving at the on-chip memory (114) successive frames of input data from the off-chip source (116); computing from a current input frame of data (30) available in the on-chip memory current result elements for completing a current output frame of results (33, 34, 35), and pre-computing from the current frame of input data future result elements for contributing to at least one future output frame of results.
摘要翻译： 一种利用能够访问片上存储器（114）的处理器（112）和来自芯片外源（116）的数据来应用计算的方法，所述方法包括迭代步骤，以在片上存储器 114）来自片外源（116）的连续帧的输入数据; 从可用于片上存储器当前结果元素的数据（30）的当前输入帧计算以完成当前输出结果帧（33,34,35），以及从当前输入数据帧的未来计算结果 促成至少一个未来输出结果框架的元素。
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12.发明授权Automatic equalization using adaptive frequency-domain filtering and dynamic fast convolution 有权使用自适应频域滤波和动态快速卷积自动均衡公开(公告)号：US09084049B2
公开(公告)日：2015-07-14
申请号：US13878705
申请日：2011-09-13
申请人： Louis D. Fielder , David S. McGrath
发明人： Louis D. Fielder , David S. McGrath
CPC分类号： H04R3/04 , H03H17/06 , H04L25/03286
摘要： Frequency-domain techniques are used for adaptive equalization that is responsive to spectral magnitude characteristics but not sensitive to phase characteristics of system response. Signal correlation may be used to improve adaptation accuracy when significant levels of ambient sounds are present. A preferred filter implementation uses convolution-based block transforms and cross-fade windows.
摘要翻译： 频域技术用于响应于光谱幅度特性但对系统响应的相位特性不敏感的自适应均衡。 当存在显着水平的环境声音时，可以使用信号相关性来提高适应精度。 优选的滤波器实现使用基于卷积的块变换和交叉渐变窗口。
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公开(公告)号：US07685218B2
公开(公告)日：2010-03-23
申请号：US11612895
申请日：2006-12-19
申请人： David S. McGrath
发明人： David S. McGrath
IPC分类号： G06F17/10
CPC分类号： G11B20/10212 , G11B20/10037 , G11B20/10046 , G11B20/1876 , G11B2020/10546
摘要： A method of adding high frequency content to an input signal to form an augmented signal, the method comprising the steps of: (a) providing an initial signal having a first predetermined lower spectral range; (b) utilizing the initial signal to form synthesized high frequency components of the initial signal; (c) filtering the initial signal with a low pass filter and filtering the synthesized high frequency components with a high pass filter (d) combining the filtered signals to form the augmented signal.
摘要翻译： 一种将高频内容添加到输入信号以形成增强信号的方法，所述方法包括以下步骤：（a）提供具有第一预定较低光谱范围的初始信号; （b）利用初始信号形成初始信号的合成高频分量; （c）用低通滤波器对初始信号进行滤波，并用合成滤波信号的高通滤波器（d）对合成的高频分量进行滤波，形成增强信号。
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公开(公告)号：US07533346B2
公开(公告)日：2009-05-12
申请号：US10500902
申请日：2003-01-09
摘要： An interactive spatialized audiovisual system links a plurality of remote used terminals. The system comprises a networked computer having an associated user database including user status information. Input means are provided at the computer for receiving a plurality of audio streams and associated locating data from the remote user terminals for, virtually locating the users relative to one another within a virtual user environment such as a chat room environment Selection means are provided for enabling selection of at least the first group of the audio streams in a first selection process based on status information in the user database. Output means output the selected group of audio streams and associated locating data for spatialization of the audio streams relative to a first listener-based audio reference frame which is substantially coherent with visual representations of the audio sources defined by the locating data at the first user terminal. Merging means are provided for merging at least some of the audio streams into a merged audio stream for transmittal to the first and other user terminal, with the merged audio stream being spatialized so as to provide for a spatialized background audio effect in the audio reference frame at the user terminal.
摘要翻译： 交互式空间化视听系统链接多个远程使用终端。 该系统包括具有包括用户状态信息的关联用户数据库的联网计算机。 在计算机上提供输入装置，用于从远程用户终端接收多个音频流和相关联的定位数据，用于在诸如聊天室环境的虚拟用户环境中虚拟地定位用户相互之间的用户选择装置用于启用 基于用户数据库中的状态信息，在第一选择过程中至少选择第一组音频流。 输出装置输出所选择的一组音频流和相关联的定位数据，用于相对于基于第一听众的音频参考帧进行空间化，该音频参考帧与由第一用户终端上的定位数据定义的音频源的视觉表示基本一致 。 合并装置被提供用于将至少一些音频流合并成合并的音频流以传送到第一和其他用户终端，合并的音频流被空间化，以便在音频参考帧中提供空间化的背景音频效果 在用户终端。
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公开(公告)号：US08885836B2
公开(公告)日：2014-11-11
申请号：US13121323
申请日：2009-09-28
申请人： David S. McGrath , Mark S. Vinton
发明人： David S. McGrath , Mark S. Vinton
摘要： An improved decorrelator is disclosed that processes an input audio signal in two separate paths. In one path, a banded phase-flip filter is applied to lower frequencies of the input audio signal. In a second path, a frequency-dependent delay is applied to higher frequencies of the input audio signal. Signals from the two paths are combined to obtain an output signal that is psychoacoustically decorrelated with the input audio signal. The decorrelated signal can be mixed with the input audio signal without generating audible artifacts.
摘要翻译： 公开了一种改进的去相关器，其处理两个独立路径中的输入音频信号。 在一个路径中，带状相位倒相滤波器被施加到输入音频信号的较低频率。 在第二路径中，频率依赖的延迟被施加到输入音频信号的较高频率。 来自两个路径的信号被组合以获得与输入音频信号心理声学去相关的输出信号。 解相关信号可以与输入音频信号混合，而不会产生可听见的伪影。
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16.发明申请Method and System for Generating A Matrix-Encoded Two-Channel Audio Signal 有权用于生成矩阵编码的双通道音频信号的方法和系统公开(公告)号：US20140219460A1
公开(公告)日：2014-08-07
申请号：US14239510
申请日：2012-08-14
申请人： David S. McGrath
发明人： David S. McGrath
IPC分类号： H04S3/02
CPC分类号： H04S3/02
摘要： In some embodiments, a method for generating a matrix-encoded two-channel audio signal in response to a horizontal B-format signal by performing a mixing operation. In other embodiments, a method for generating a matrix-encoded two-channel audio signal, including steps of generating microphone output signals (by capturing sound with a microphone array), and performing a mixing operation on the microphone output signals, where the mixing operation is equivalent to generating a horizontal B-format signal in response to the microphone output signals, and generating the matrix-encoded two-channel audio signal in response to the horizontal B-format signal. The microphone array is typically a small array of cardiod microphones (e.g., an array consisting of three cardiod microphones). Other aspects include systems (e.g., encoders) programmed or otherwise configured to perform any embodiment of the method for generating a matrix-encoded two-channel audio signal.
摘要翻译： 在一些实施例中，一种用于通过执行混合操作来响应于水平B格式信号来产生矩阵编码的双声道音频信号的方法。 在其他实施例中，一种用于产生矩阵编码的双声道音频信号的方法，包括产生麦克风输出信号（通过用麦克风阵列捕获声音）和对麦克风输出信号执行混频操作的步骤，其中混合操作 等效于响应于麦克风输出信号产生水平B格式信号，并且响应于水平B格式信号产生矩阵编码的双声道音频信号。 麦克风阵列通常是少量的心形麦克风（例如，由三个心形麦克风组成的阵列）。 其它方面包括已编程或以其他方式配置为执行用于生成矩阵编码的双声道音频信号的方法的任何实施例的系统（例如，编码器）。
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17.发明申请Automatic Equalization Using Adaptive Frequency-Domain Filtering and Dynamic Fast Convolution 有权使用自适应频域滤波和动态快速卷积的自动均衡公开(公告)号：US20130208917A1
公开(公告)日：2013-08-15
申请号：US13878705
申请日：2011-09-13
申请人： Louis D. Fielder , David S. McGrath
发明人： Louis D. Fielder , David S. McGrath
IPC分类号： H04R3/04
CPC分类号： H04R3/04 , H03H17/06 , H04L25/03286
摘要： Frequency-domain techniques are used for adaptive equalization that is responsive to spectral magnitude characteristics but not sensitive to phase characteristics of system response. Signal correlation may be used to improve adaptation accuracy when significant levels of ambient sounds are present. A preferred filter implementation uses convolution-based block transforms and cross-fade windows.
摘要翻译： 频域技术用于响应于光谱幅度特性但对系统响应的相位特性不敏感的自适应均衡。 当存在显着水平的环境声音时，可以使用信号相关性来提高适应精度。 优选的滤波器实现使用基于卷积的块变换和交叉渐变窗口。
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公开(公告)号：US07321913B2
公开(公告)日：2008-01-22
申请号：US10731618
申请日：2003-12-08
申请人： David S. McGrath
发明人： David S. McGrath
IPC分类号： G06F17/10
CPC分类号： H03H17/0621 , H03H17/0211 , H03H17/0261
摘要： A method of determining filter coefficients for filter stages in a multirate digital filter device to achieve a desired filter response. The method includes the step of determining a first plurality of evenly spaced sample points representing the desired response function on a logarithmic time scale, such that the sample points of the first plurality have an increasing spacing when viewed in a linear time scale. The method further includes the step determining filter coefficients for each filter stage from an associated group of sample points out of the first plurality of sample points.
摘要翻译： 一种确定多速率数字滤波器装置中的滤波器级的滤波器系数以实现期望的滤波器响应的方法。 该方法包括以对数时间尺度确定表示期望的响应函数的第一多个均匀间隔的采样点的步骤，使得当以线性时间尺度观看时，第一多个采样点具有增加的间隔。 所述方法还包括步骤：从所述第一多个采样点中的相关联的一组采样点确定每个滤波器级的滤波器系数。
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公开(公告)号：US5115614A
公开(公告)日：1992-05-26
申请号：US703806
申请日：1991-05-21
申请人： David S. McGrath
发明人： David S. McGrath
CPC分类号： E04B1/703 , E02D31/02 , E04B1/644 , E04C1/39 , E04B1/7038
摘要： A composite cored masonry unit with a moisture collection void that has a waterproof material that coats the surface of the portion of said unit adjacent to said void with the masonry unit having a base with a sloped top surface and flat bottom surface and with a weep hole located so as to drain moisture from the moisture collection void.
摘要翻译： 一种具有水分收集空隙的复合芯砌体单元，其具有防水材料，其涂覆与所述空隙相邻的所述单元的部分的表面，所述砖石单元具有具有倾斜顶表面和平坦底表面的基部以及具有漏水孔 以便从水分收集空间排出水分。
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