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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：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：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：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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7.发明授权公开(公告)号：US06795556B1
公开(公告)日：2004-09-21
申请号：US09579122
申请日：2000-05-25
IPC分类号： H04R500
CPC分类号： H04S1/002 , B33Y80/00 , H04S1/005 , H04S2420/01
摘要： Original head-related transfer functions (HRTFs) are modified for a non-standard dimensioned head. The HRTF includes a near-ear response function, a far-ear response function, and an inter-aural time delay (ITD). The modified HRTF resembles an HRTF approximating that derived for a listener having different head and/or ear dimensions to the standard dimensions. The ITD value of the HRTF is multiplied by a given scaling factor independent of frequency. The near ear and/or far ear response function of the HRTF is multiplied by a constant scaling factor in the frequency domain independent of time delay, to expand or compress the functions in the frequency domain. The near ear and/or far ear response function of the HRTF are provided with a positive or negative offset value in the frequency domain. The amplitude of the near ear and/or far ear response function of the original HRTF(s) is (are) multiplied by a given gain factor.
摘要翻译： 原始头部相关传输功能（HRTF）针对非标准尺寸头进行了修改。 HRTF包括近耳响应功能，远耳响应功能和听觉间延迟（ITD）。 修改的HRTF类似于对于具有与标准尺寸不同的头部和/或耳朵尺寸的收听者导出的HRTF近似。 HRTF的ITD值乘以与频率无关的给定比例因子。 HRTF的近耳和/或远耳响应功能与时间延迟无关地在频域中乘以恒定缩放因子，以扩展或压缩频域中的功能。 HRTF的近耳和/或远耳响应功能在频域中具有正或负偏移值。 原始HRTF的近耳和/或远耳响应函数的幅度乘以给定的增益因子。
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公开(公告)号：US5917916A
公开(公告)日：1999-06-29
申请号：US851721
申请日：1997-05-05
CPC分类号： H04S1/002 , H04R2420/05 , H04S1/005 , H04S2420/01
摘要： Stereophonic sound reproduction apparatus comprising an input means (2) for producing binaural signals, cross-talk cancellation means, (10) loudspeaker means, (20, 22) headphone means, (26) and a switch means (12, 18, 24, 30, 32) which in a first position (plug 24 not inserted in socket 18) couples the binaural signals from the input means (2) to the loudspeaker means (20, 22) through the cross-talk cancellation means (10) and in a second position (plug 24 inserted in socket 18) renders the cross-talk cancellation means (10) inoperable and couples the binaural signals from the input means (2) to the headphones (26).
摘要翻译： 立体声再现装置，包括用于产生双耳信号的输入装置（2），串扰消除装置，（10）扬声器装置，（20,22）耳机装置，（26）和开关装置（12,18,24， 在第一位置（未插入插座18中的插头24）通过串扰消除装置（10）将来自输入装置（2）的双耳信号耦合到扬声器装置（20,22），并且 第二位置（插入插座18中的插头24）使得串扰消除装置（10）不可操作，并将来自输入装置（2）的双耳信号耦合到耳机（26）。
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公开(公告)号：US5666425A
公开(公告)日：1997-09-09
申请号：US507437
申请日：1996-03-20
CPC分类号： H04S3/002 , H04S2400/01 , H04S2400/15
摘要： An artificial head (2) and a plurality of discrete monophonic microphones (8, 10, 12) are used to record one or more sound sources. The signals (14, 16, 18) from each of the microphones (8, 10, 12) then undergo binaural synthesis based upon acoustical properties of a real human head or the artificial head (2), and the signals (4, 6) from the head are equalised using air-to-ear transfer functions of the artificial head (2) or a real head. The resultant signals are combined by summing the individual left (48) and right (50) channels together and then these summed signals (52, 54) are transaural crosstalk compensated (56) to provide final left and right channel signals (58, 60) suitable for recording or playback which provide a three-dimensional sound effect to a listener both via headphones and loudspeakers.
摘要翻译： PCT No.PCT / GB94 / 00350 Sec。 371日期：1996年3月20日 102（e）1996年3月20日PCT PCT 1994年2月23日PCT公布。 出版物WO94 / 22278 日期1994年9月29日人造头（2）和多个离散单声道麦克风（8,10,12）用于记录一个或多个声源。 来自每个麦克风（8,10,12）的信号（14,16,18）然后基于真实人头或人造头（2）的声学特性进行双耳合成，并且信号（4,6） 使用人造头（2）的空气 - 耳朵传递功能或真正的头部从头部均衡。 所得到的信号通过将各个左（48）和右（50）通道相加在一起而组合，然后这些相加信号（52,54）经过经弦波串扰补偿（56）以提供最终的左和右声道信号（58,60） 适合于通过耳机和扬声器向收听者提供三维声音效果的记录或回放。
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公开(公告)号：US08953814B2
公开(公告)日：2015-02-10
申请号：US12599026
申请日：2008-05-08
申请人： Alastair Sibbald
发明人： Alastair Sibbald
CPC分类号： G10K11/16 , G10K11/178 , G10K2210/1081 , H04M1/6066 , H04M1/7253 , H04R1/1041 , H04R1/1083 , H04R5/033 , H04R2420/05 , H04R2499/11
摘要： Noise reduction circuitry for a communication apparatus can apply different noise reduction transfer functions, depending on whether a listening device is connected to the apparatus. If no listening device is connected, the noise reduction transfer function can be adapted for use with microphones (12) and speakers (28) that form an integral part of the communication apparatus, which may be a cellular telephone. If a listening device is connected, the noise reduction transfer function can be adapted for use with microphones (12) and speakers (28) that form a part of the listening device. This allows the noise reduction circuitry to provide improved noise reduction performance.
摘要翻译： 用于通信设备的降噪电路可以根据听音设备是否连接到该设备来应用不同的降噪传递功能。 如果没有连接听音装置，则降噪传递功能可适用于形成通信装置的组成部分的麦克风（12）和扬声器（28），扬声器可以是蜂窝电话。 如果连接了听音装置，则降噪传递功能可适用于构成听音装置一部分的麦克风（12）和扬声器（28）。 这允许降噪电路提供改进的降噪性能。
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