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11.发明申请Binaural sound localization using a formant-type cascade of resonators and anti-resonators 有权双声道定位使用共振峰型级联的谐振器和反谐振器公开(公告)号：US20050117762A1
公开(公告)日：2005-06-02
申请号：US10983251
申请日：2004-11-04
申请人： Atsuhiro Sakurai , Steven Trautmann
发明人： Atsuhiro Sakurai , Steven Trautmann
CPC分类号： H04S1/002
摘要： This invention is a method for binaural localization using a cascade of resonators and anti-resonators to implement an HRTF (head-related transfer function). The spectrum of the cascade reproduces the magnitude spectrum of a desired HRTF. The proposed method provides a considerably more computationally efficient implementation of HRTF filters with no detectable deterioration of output quality while saving memory when storing a large quantity of HRTFs due to the parameterization of its resonators and anti-resonators. Finally, the method offers additional flexibility since the resonators and anti-resonators can be manipulated individually during the design process, making it possible to interpolate smoothly between HRTFs, reduce spectral coloring or achieve higher accuracy at perceptually relevant frequency regions. These HRTF are useful in stereo enhancement and multi-channel virtual surround simulation.
摘要翻译： 本发明是使用级联的谐振器和反谐振器来实现HRTF（头部相关传递函数）的双耳定位的方法。 级联的光谱重现所需HRTF的幅度谱。 所提出的方法提供了相对更高的HRTF滤波器的计算有效的实现，在由于其谐振器和反谐振器的参数化而存储大量的HRTF时，无需检测到输出质量的恶化，同时节省存储器。 最后，该方法提供了额外的灵活性，因为在设计过程中可以单独操纵谐振器和反谐振器，使得可以在HRTF之间平滑地内插，减少频谱着色或在感知相关的频率区域实现更高的精度。 这些HRTF在立体声增强和多通道虚拟环绕模拟中非常有用。
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12.发明授权Method and system for estimating frequency and amplitude change of spectral peaks 有权用于估计频谱峰值的频率和振幅变化的方法和系统公开(公告)号：US08275475B2
公开(公告)日：2012-09-25
申请号：US12193678
申请日：2008-08-18
IPC分类号： G06F17/00
CPC分类号： G10L19/093
摘要： Methods, digital systems, and computer readable media are provided for estimating change of amplitude and frequency in a digital audio signal by transforming a frame of the digital audio signal to the frequency domain, locating a frequency peak in the transformed frame, determining an interpolated peak of the located frequency peak, computing inner products of a portion of the transformed frame about the interpolated peak with a plurality of test signals, and estimating change of amplitude and change of frequency for the frequency peak from results of the inner products.
摘要翻译： 提供方法，数字系统和计算机可读介质，用于通过将数字音频信号的帧变换为频域来估计数字音频信号中的幅度和频率的变化，在变换帧中定位频率峰值，确定内插峰值 通过多个测试信号来计算关于内插峰值的变换帧的一部分的内积，以及从内积的结果估计频率峰值的频率变化和频率变化。
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13.发明授权Phase locking method for frequency domain time scale modification based on a bark-scale spectral partition 有权基于树皮刻度光谱分区的频域时标修正相位锁定方法公开(公告)号：US08019598B2
公开(公告)日：2011-09-13
申请号：US10714174
申请日：2003-11-14
申请人： Atsuhiro Sakurai , Steven Trautmann
发明人： Atsuhiro Sakurai , Steven Trautmann
IPC分类号： G10L19/14
CPC分类号： G10L21/04
摘要： This invention improves the perceived quality of frequency-domain time scale modification by selection of spectral bands used in phase locking based upon a Bark scale according to the variation in human hearing frequency response. A spectral peak is identified for each band. At these peaks the phases are rotated using the phase vocoder algorithm. For a few spectral lines near these peaks, the phase differences are copied from the non-rotated spectrum. The number selected is preferably 4. Remaining spectral lines within each spectral band located farther from the peak are phase rotated using the phase vocoder algorithm. The boundaries of the spectral bands may be adjusted based upon the digital audio data to maintain important frequency groups within the same spectral band.
摘要翻译： 本发明根据人类听觉频率响应的变化，通过基于Bark量表选择用于锁相的频谱带来改进频域时标修正的感知质量。 为每个频带识别出频谱峰。 在这些峰上，使用相位声码器算法旋转相位。 对于这些峰附近的几条光谱线，相位差从非旋转光谱复制。 所选择的数字优选为4.使用相位声码器算法相位旋转位于离峰值更远的每个频带内的剩余谱线。 可以基于数字音频数据来调整频谱带的边界，以维持相同频谱范围内的重要频率组。
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公开(公告)号：US20110026718A1
公开(公告)日：2011-02-03
申请号：US12900176
申请日：2010-10-07
IPC分类号： H04R5/00
CPC分类号： H04S1/005 , H04S2420/01 , H04S2420/07
摘要： Audio loudspeaker and headphone virtualizers and cross-talk cancellers and methods use separate virtual speaker locations for different Bark frequency bands and a single reverberation filter for multi-channel virtualizer inputs.
摘要翻译： 音频扬声器和耳机虚拟器和串扰消除器和方法使用不同的Bark频带的单独的虚拟扬声器位置和用于多通道虚拟器输入的单个混响滤波器。
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15.发明授权Time-scale modification of music signals based on polyphase filterbanks and constrained time-domain processing 有权基于多相滤波器组的音乐信号的时间尺度修改和受限的时域处理公开(公告)号：US06982377B2
公开(公告)日：2006-01-03
申请号：US10739632
申请日：2003-12-18
IPC分类号： G10H5/00
CPC分类号： G10H1/125 , G10H2240/061
摘要： A time scale modification method employs separate bands obtained through an analysis polyphase filter bank with separate time-scale modification processing for the bands. The outputs are combined using a synthesis filter bank. Some constraints are imposed on the time-scale modification processing, such a limitation of the range of overlap adjustment values for bands other than the greatest energy band, to eliminate noise due to aliasing and inter-channel phase mismatch. This invention produces output quality considerably higher than conventional time-domain time-scale modification methods for general music signals with computational requirements comparable to those of conventional time-domain time-scale modification methods.
摘要翻译： 时间尺度修正方法采用通过分析多相滤波器组获得的分离带，对带进行单独的时间尺度修正处理。 输出使用合成滤波器组合成。 对时间尺度修改处理施加了一些约束，这是对最大能带以外的频带的重叠调整值的范围的限制，以消除由于混叠和信道间相位失配引起的噪声。 本发明产生的输出质量明显高于用于一般音乐信号的常规时域时间尺度修改方法，其计算要求与常规时域时间尺度修改方法相当。
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公开(公告)号：US08085958B1
公开(公告)日：2011-12-27
申请号：US11752723
申请日：2007-05-23
IPC分类号： H04R5/02
CPC分类号： H04S7/30 , H04S2420/01
摘要： Audio loudspeaker virtualizers and cross-talk cancellers and methods use a combination of interaural intensity difference and interaural time difference to define virtualizing filters. This allows enlargement of a listener's sweet spot based on psychoacoustic effects.
摘要翻译： 音频扬声器虚拟化器和串扰消除器和方法使用昼间强度差异和间隔时间差的组合来定义虚拟化滤波器。 这可以基于心理声学效应扩大听众的甜蜜点。
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17.发明授权Method and system for determining a gain reduction parameter level for loudspeaker equalization 有权用于确定扬声器均衡的增益降低参数电平的方法和系统公开(公告)号：US08085951B2
公开(公告)日：2011-12-27
申请号：US12409347
申请日：2009-03-23
摘要： Methods, digital systems, and computer readable media are provided for determining a gain reduction parameter level for loudspeaker equalization by determining a noise score, an equalization effectiveness score, and an equalization non-effectiveness score for a candidate gain reduction parameter level, determining a composite quality score using the three scores, and designing a compensating filter for the loudspeaker using the candidate gain reduction parameter level if the composite quality score is better than composite quality scores of all other candidate gain reduction parameter levels.
摘要翻译： 提供方法，数字系统和计算机可读介质，用于通过确定候选增益降低参数水平的噪声分数，均衡有效性得分和均衡非有效性评分来确定用于扬声器均衡的增益降低参数水平， 使用三个分数的质量得分，以及如果复合质量得分优于所有其他候选增益降低参数水平的综合质量得分，则使用候选增益降低参数水平设计用于扬声器的补偿滤波器。
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公开(公告)号：US08065140B2
公开(公告)日：2011-11-22
申请号：US12185800
申请日：2008-08-04
IPC分类号： G10L19/00
CPC分类号： G10L25/90
摘要： Methods, digital systems, and computer readable media are provided for determining a predominant fundamental frequency of a frame of an audio signal by finding a maximum absolute signal value in history data for the frame, determining a number of bits for downshifting based on the maximum absolute signal value, computing autocorrelations for the frame using signal values downshifted by the number of bits, and determining the predominant fundamental frequency using the computed autocorrelations.
摘要翻译： 提供方法，数字系统和计算机可读介质，用于通过在帧的历史数据中找到最大绝对信号值来确定音频信号的帧的主要基频，基于最大绝对值确定用于降档的位数 信号值，使用由位数减少的信号值来计算帧的自相关性，以及使用所计算的自相关来确定主要基频。
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19.发明申请Method and System for Determining a Gain Reduction Parameter Level for Loudspeaker Equalization 有权用于确定扬声器均衡的增益减小参数级别的方法和系统公开(公告)号：US20100239097A1
公开(公告)日：2010-09-23
申请号：US12409347
申请日：2009-03-23
摘要： Methods, digital systems, and computer readable media are provided for determining a gain reduction parameter level for loudspeaker equalization by determining a noise score, an equalization effectiveness score, and an equalization non-effectiveness score for a candidate gain reduction parameter level, determining a composite quality score using the three scores, and designing a compensating filter for the loudspeaker using the candidate gain reduction parameter level if the composite quality score is better than composite quality scores of all other candidate gain reduction parameter levels.
摘要翻译： 提供方法，数字系统和计算机可读介质，用于通过确定候选增益降低参数水平的噪声分数，均衡有效性得分和均衡非有效性评分来确定用于扬声器均衡的增益降低参数水平， 使用三个分数的质量得分，以及如果复合质量得分优于所有其他候选增益降低参数水平的综合质量得分，则使用候选增益降低参数水平设计用于扬声器的补偿滤波器。
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公开(公告)号：US20050254660A1
公开(公告)日：2005-11-17
申请号：US11125927
申请日：2005-05-10
申请人： Atsuhiro Sakurai , Steven Trautmann
发明人： Atsuhiro Sakurai , Steven Trautmann
CPC分类号： H04S1/002 , H04S2420/01
摘要： Audio cross-talk cancellation by inverse HRTF matrix only for low frequencies; high frequencies rely upon the natural barrier of a listener's head. The low frequency cutoff is determined by a peak in the inverse matrix of the head-related transfer functions.
摘要翻译： 通过反向HRTF矩阵对低频进行音频串扰消除; 高频依靠听众头脑的天然屏障。 低频截止由头相关传递函数的逆矩阵中的峰值确定。
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