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公开(公告)号：US06643375B1
公开(公告)日：2003-11-04
申请号：US09185711
申请日：1998-11-04
IPC分类号： H04R500
CPC分类号： H04S1/005
摘要： A method of processing a plural channel audio signal representing a three dimensional sound-field for generation by respective left and right loudspeakers arranged at a given distance from a listener, including: a) choosing a distance between said loudspeakers and said listener; b) determining from this chosen distance an optimal amount of transaural acoustic crosstalk compensation, the optimal amount being a function of the chosen distance; and c) applying said optimal amount of crosstalk compensation to said left and right channels. The optimal transaural crosstalk cancellation is preferably achieved using a near ear response transfer function and a far ear response transfer function which asymptotically approach different values at low frequencies. The method may further include choosing an angle between the left channel loudspeaker and the right channel loudspeaker, and determining from both the chosen angle and the chosen distance an optimal amount of transaural crosstalk compensation.
摘要翻译： 一种处理表示三维声场的多声道音频信号的方法，所述多声道音频信号用于通过从收听者以给定距离布置的相应左和右扬声器生成，包括：a）选择所述扬声器和所述收听者之间的距离; b）从该选择的距离确定最佳数量的经弦波声学串扰补偿，最佳量是所选距离的函数; 以及c）将所述最佳量的串扰补偿应用于所述左和右声道。 优选的超音速串扰消除优选使用近耳响应传递函数和在低频处渐近地接近不同值的远耳响应传递函数来实现。 该方法还可以包括选择左声道扬声器和右声道扬声器之间的角度，以及从所选择的角度和所选距离两者确定最佳量的经弦波串扰补偿。
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公开(公告)号：US07197151B1
公开(公告)日：2007-03-27
申请号：US09270768
申请日：1999-03-17
摘要： A method of improving 3D sound reproduction is described, in which virtual sound sources to be positioned behind a listener 10 are filtered using an HF-cut filter in order to remove distracting high-frequency components caused by incomplete transaural crosstalk cancellation. Sound sources placed in the rearward hemisphere of reference sphere 30 are filtered by an amount dependent on the position of the sound source in order to provide a smooth transition between the filtered and unfiltered hemispheres. HF-cut filtering is at a maximum when the sound source is placed directly behind the listener, and is progressively reduced as the forward hemisphere is approached. The invention offers an advantage in that virtual sound images may be placed more effectively behind the listener, given improved realism of 3D effects.
摘要翻译： 描述了一种改善3D声音再现的方法，其中使用HF截止滤波器对要置于收听者10后面的虚拟声源进行滤波，以便消除由不完整的超音速串扰消除引起的分心的高频分量。 放置在参考球30的后半球中的声源被滤波取决于声源的位置的量，以便提供滤光和未过滤的半球之间的平滑过渡。 当声源直接放置在收听者后面时，HF截止滤波处于最大值，并且随着前半球的接近逐渐减小。 本发明提供了一种优点，其中，假设改进的3D效果的真实性，虚拟声音图像可以更有效地放置在听众的后面。
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公开(公告)号：US06208687B1
公开(公告)日：2001-03-27
申请号：US09171366
申请日：1999-05-04
申请人： Richard David Clemow
发明人： Richard David Clemow
IPC分类号： H04B1500
CPC分类号： H03H17/0294 , H03H2017/0295
摘要： A filter apparatus (1) has a digital FIR filter (8) divided into two or more sections (6, 12) with means (18, 20, 22, 24, 26, 40) for varying the filter function of each section (6, 12). The filter (1) has an input switch (2,4) and an output switch (28, 30,32) which includes a fader (28, 30, 32) to enable one or more section (6, 12) to be switched out of circuit without disrupting the passage of signals to be filtered through the other section or sections (6, 12) of the filter (8). The filter function of each section (6, 12) is adjustable when the section (6,12) is switched out of circuit.
摘要翻译： 滤波器装置（1）具有数字FIR滤波器（8），其被分成具有用于改变每个部分（6）的滤波器功能的装置（18,20,22,24,26,40）的两个或多个部分（6,12） ，12）。 滤波器（1）具有输入开关（2,4）和输出开关（28,30,32），输出开关包括推子（28,30,32），以使得能够切换一个或多个区段（6,12） 不会扰乱通过过滤器（8）的另一部分（6,12）而被过滤的信号的通过。 当部分（6,12）切断电路时，每个部分（6,12）的滤波器功能可调。
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公开(公告)号：US08645444B2
公开(公告)日：2014-02-04
申请号：US12745726
申请日：2008-12-12
IPC分类号： G06F17/10
CPC分类号： H03H17/04 , H03H17/0227
摘要： An infinite impulse response (IIR) filter is provided for receiving an input signal and outputting a filtered signal. The filter comprises feedback circuitry for feeding back said filtered signal, the feedback circuitry comprising a first delay element for delaying said filtered signal; and a sub-unit, for receiving said delayed filtered signal, for outputting a summed signal which is the difference between said delayed filtered signal and a further-delayed filtered signal, and for outputting a multiplied signal which is an inverted further-delayed filtered signal multiplied by a first filter coefficient. At least said input signal, said delayed filtered signal, said multiplied signal, and said summed signal are employed to generate said filtered signal.
摘要翻译： 提供无限脉冲响应（IIR）滤波器用于接收输入信号并输出滤波信号。 滤波器包括用于反馈所述滤波信号的反馈电路，所述反馈电路包括用于延迟所述滤波信号的第一延迟元件; 以及用于接收所述延迟滤波信号的子单元，用于输出作为所述延迟滤波信号与另一延迟滤波信号之差的加和信号，并输出作为反相进一步延迟滤波信号的相乘信号 乘以第一滤波器系数。 采用至少所述输入信号，所述延迟滤波信号，所述相乘信号和所述求和信号来产生所述滤波信号。
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公开(公告)号：US07167567B1
公开(公告)日：2007-01-23
申请号：US09367153
申请日：1998-12-11
CPC分类号： H04S7/302 , H04S5/00 , H04S2400/01
摘要： A method of processing a single channel audio signal to provide an audio source signal having left and right channels corresponding to a sound source at a given direction in space, includes performing a binaural synthesis introducing a time delay between the channels corresponding to the inter-aural time difference for a signal coming from said given direction, and controlling the left ear signal magnitude and the right ear signal magnitude to be at respective values. These values are determined by choosing a position for the sound source relative to the position of the head of a listener in use, calculating the distance from the chosen position of the sound source to respective ears of the listener, and determining the corresponding left ear signal magnitude and right ear signal magnitude using the inverse square law dependence of sound intensity with distance to provide cues for perception of the distance of said sound source in use.
摘要翻译： 一种处理单声道音频信号以在空间中给定方向上提供具有对应于声源的左声道和右声道的音频源信号的方法包括：执行双声道合成，引入对应于听觉间的声道之间的时间延迟 来自所述给定方向的信号的时间差，以及将左耳信号幅度和右耳信号幅度控制在各自的值。 这些值通过选择声源相对于正在使用的收听者的头部的位置的位置来确定，计算从声源的选定位置到听众的相应耳朵的距离，以及确定相应的左耳信号 幅度和右耳信号幅度，使用声音强度与距离的反平方律依赖性来提供用于感知所述声源在使用中的距离的线索。
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公开(公告)号：US5751815A
公开(公告)日：1998-05-12
申请号：US663317
申请日：1996-06-21
摘要： An audio signal balance control arranged is described in which, by utilizing binaural head related transfer functions, balance control beyond a first plane (22) in which two loudspeakers lie may be achieved. The transfer functions are derived from conventional artificial-head recording techniques with various attitudes of the artificial head in a further plane (25) normal to the first plane (22).
摘要翻译： PCT No.PCT / GB94 / 02756 Sec。 371日期：1996年6月21日 102（e）日期1996年6月21日PCT 1994年12月16日PCT PCT。 第WO95 / 17799号公报 日期：1995年6月29日描述了一种布置的音频信号平衡控制，其中通过利用双耳头相关的传递函数，可以实现超过可以实现两个扬声器所在的第一平面（22）的平衡控制。 传递函数是从具有人造头的各种姿态的常规人造头记录技术导出的，在另一平面（25）中垂直于第一平面（22）。
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公开(公告)号：US20100306297A1
公开(公告)日：2010-12-02
申请号：US12745726
申请日：2008-12-12
IPC分类号： G06F17/10
CPC分类号： H03H17/04 , H03H17/0227
摘要： An infinite impulse response (IIR) filter is provided for receiving an input signal and outputting a filtered signal. The filter comprises feedback circuitry for feeding back said filtered signal, the feedback circuitry comprising a first delay element for delaying said filtered signal; and a sub-unit, for receiving said delayed filtered signal, for outputting a summed signal which is the difference between said delayed filtered signal and a further-delayed filtered signal, and for outputting a multiplied signal which is an inverted further-delayed filtered signal multiplied by a first filter coefficient. At least said input signal, said delayed filtered signal, said multiplied signal, and said summed signal are employed to generate said filtered signal.
摘要翻译： 提供无限脉冲响应（IIR）滤波器用于接收输入信号并输出滤波信号。 滤波器包括用于反馈所述滤波信号的反馈电路，所述反馈电路包括用于延迟所述滤波信号的第一延迟元件; 以及用于接收所述延迟滤波信号的子单元，用于输出作为所述延迟滤波信号与另一延迟滤波信号之差的加和信号，并输出作为反相进一步延迟滤波信号的相乘信号 乘以第一滤波器系数。 采用至少所述输入信号，所述延迟滤波信号，所述相乘信号和所述求和信号来产生所述滤波信号。
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公开(公告)号：US20090029681A1
公开(公告)日：2009-01-29
申请号：US12161952
申请日：2007-01-26
CPC分类号： H04M19/04 , G06F9/451 , G06F9/542 , G06F2209/545 , H04M1/72544 , H04M1/72569 , H04M1/72572 , H04M1/72597
摘要： A mobile electronic device is programmed so that when the device is running a an application and an event occurs that the device needs to notify the user about, then the device alters the visual and/or sonic behaviour of the application according to, a pre-defined event notification profile. The user can select a desired event notification profile from a menu of available profiles stored in the device. For example, the event notification profile could be graphics and/or audio in the application gently fading to an alternative state using a pre-defined transition effect.
摘要翻译： 移动电子设备被编程，使得当设备正在运行应用程序并且发生设备需要通知用户的事件时，设备根据预先设定的方式更改应用程序的视觉和/或声音行为， 定义的事件通知配置文件。 用户可以从存储在设备中的可用简档的菜单中选择所需的事件通知简档。 例如，事件通知简档可以是应用中的图形和/或音频，使用预定义的转换效果轻轻地衰落到替代状态。
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公开(公告)号：US06614910B1
公开(公告)日：2003-09-02
申请号：US09297460
申请日：1999-07-16
IPC分类号： H04R2500
摘要： A stereo sound expander reproduces a realistic sound image in three dimensions by coupling modified and unmodified stereo signals. By not modifying a Head Related Transfer Function (HRTF) for one signal and equalizing the HRTF for the other signal, a flattened frequency response is produced with no tonal changes, but with a high degree of spatial accuracy. Resultant output signals may be used to generate binaural signals or can be fed into crosstalk cancellers.
摘要翻译： 立体声扩音器通过耦合修改和未修改的立体声信号，三维地再现逼真的声像。 通过不修改一个信号的头部相关传递函数（HRTF）并对其他信号均衡HRTF，产生没有色调变化但具有高空间精度的扁平化频率响应。 结果输出信号可用于产生双耳信号或可以馈送到串音消除器。
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公开(公告)号：US06577736B1
公开(公告)日：2003-06-10
申请号：US09332601
申请日：1999-06-14
申请人： Richard David Clemow
发明人： Richard David Clemow
IPC分类号： H04R500
CPC分类号： H04R5/02 , H04R5/027 , H04S5/00 , H04S5/02 , H04S2420/01
摘要： A method of synthesizing a three dimensional sound-field using a pair of front and a pair of rear loudspeakers, including: a) determining the desired position of a sound source; b) providing a binaural pair of signals corresponding to the sound source using an HRTF filter; c) providing the left signal of said binaural pair of signals to both the left front and left rear loudspeakers through a front and a rear gain control means respectively; d) providing the right signal of said binaural pair of signals to both the right front and right rear loudspeakers through a front and a rear gain control means respectively; e) controlling the ratio of the front signal gains to the rear signal gains as a function of the azimuth angle of the sound source; and f) performing transaural crosstalk cancellation on the front and rear signal pairs through respective transaural crosstalk cancellation means.
摘要翻译： 一种使用一对前置扬声器和一对后置扬声器来合成三维声场的方法，包括：a）确定声源的期望位置; b）使用HRTF滤波器提供对应于声源的双耳对信号; c）分别通过前后增益控制装置向左前后扬声器和左后扬声器提供所述双耳信号的左信号; d）分别通过前和后增益控制装置向右前扬声器和右后扬声器提供所述双耳信号的正确信号; e）根据声源的方位角控制前信号增益与后信号增益的比率; 以及f）通过相应的经弦波串扰消除装置在前信号对和后信号对上执行经昼夜串扰消除。
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