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1. 发明授权

US6035045A Sound image localization method and apparatus, delay amount control apparatus, and sound image control apparatus with using delay amount control apparatus 失效
标题翻译：声像定位方法和装置，延迟量控制装置和具有使用延迟量控制装置的声像控制装置
公开(公告)号：US6035045A
公开(公告)日：2000-03-07
申请号：US953314
申请日：1997-10-17
申请人： Akihiro Fujita , Kenji Kamada , Kouji Kuwano
发明人： Akihiro Fujita , Kenji Kamada , Kouji Kuwano
IPC分类号： H04S1/00 , H04R5/00
CPC分类号： H04S1/002 , H04S1/005
摘要： A sound image control apparatus is arranged by a time difference signal producing unit, and a function processing unit. The time difference producing unit sequentially outputs externally supplied input signals as a first time difference signal and a second time difference signal while giving an inter aural time difference corresponding to a sound image localization direction. This second time difference signal is externally outputted as a left channel signal. Also, the first time difference signal is processed in the function processing unit by using a relative function constituted by a ratio of a left head related acoustic transfer function to a right head related acoustic transfer function in correspondence with the sound image localization direction, and the processed signal is externally outputted as a right channel signal.
摘要翻译：由时差信号产生单元和功能处理单元设置声像控制装置。时间差产生单元在给出对应于声像定位方向的间隔时间差的同时，顺序地输出外部提供的输入信号作为第一时间差信号和第二时间差信号。该第二时间差信号作为左声道信号被外部输出。此外，第一时差信号在功能处理单元中通过使用由与左声道相关的声音传递函数与与声像定位方向对应的右头相关的声音传递函数的比率构成的相对函数来处理，并且被处理的信号作为右声道信号被外部输出。

2. 发明授权

US06430294B1 Sound image localization method and apparatus, delay amount control apparatus, and sound image control apparatus with using delay amount control apparatus 失效
标题翻译：声像定位方法和装置，延迟量控制装置和具有使用延迟量控制装置的声像控制装置
公开(公告)号：US06430294B1
公开(公告)日：2002-08-06
申请号：US09362148
申请日：1999-07-28
申请人： Akihiro Fujita , Kenji Kamada , Kouji Kuwano
发明人： Akihiro Fujita , Kenji Kamada , Kouji Kuwano
IPC分类号： H04R500
CPC分类号： H04S1/002 , H04S1/005
摘要： A delay amount control apparatus is arranged by a delay amount detecting unit, a delay amount saving unit, a delay unit, and a cross-fade mixing unit. The delay amount detecting unit detects as to whether or not the delay coefficient is changed. The delay amount saving unit saves a delay coefficient before being changed when the delay amount detecting unit detects that the delay coefficient is changed. Then, the delay unit outputs a first delay signal produced by delaying the externally supplied input signal by a delay amount designated by the delay coefficient before being changed, which is saved in the delay amount saving unit, and also a second delay signal produced by delaying the externally supplied input signal by a delay amount designated by the externally supplied delay coefficient. The cross-fade mixing unit cross-fades the first delay signal and the second delay signal outputted from the delay unit so as to mix the first delay signal with the second delay signal.
摘要翻译：延迟量控制装置由延迟量检测单元，延迟量保存单元，延迟单元和交叉淡入淡出混合单元来布置。延迟量检测单元检测延迟系数是否改变。当延迟量检测单元检测到延迟系数改变时，延迟量保存单元在改变之前保存延迟系数。然后，延迟单元输出通过将外部提供的输入信号延迟由改变之前的延迟系数指定的延迟量而产生的第一延迟信号，其被保存在延迟量保存单元中，以及通过延迟产生的第二延迟信号外部提供的输入信号由外部提供的延迟系数指定的延迟量。交叉淡入淡出混合单元使从延迟单元输出的第一延迟信号和第二延迟信号交叉淡化，以将第一延迟信号与第二延迟信号混合。

3. 发明授权

US06507657B1 Stereophonic sound image enhancement apparatus and stereophonic sound image enhancement method 失效
标题翻译：立体声声像增强装置和立体声声像增强方法
公开(公告)号：US06507657B1
公开(公告)日：2003-01-14
申请号：US09080057
申请日：1998-05-15
申请人： Kenji Kamada , Akihiro Fujita , Kouji Kuwano
发明人： Kenji Kamada , Akihiro Fujita , Kouji Kuwano
IPC分类号： H04R500
CPC分类号： H04S1/002
摘要： A stereophonic sound image enhancement apparatus comprises a first filter for changing a phase of a left channel input signal in response to a frequency of the left channel input signal; a second filter for changing a phase of a right channel input signal in response to a frequency of the right channel input signal; a first calculating means for calculating a difference between the left channel input signal and the phase-changed signal derived from the second filter to thereby output the difference signal as a left channel output signal; and a second calculating means for calculating a difference between the right channel input signal and the phase-changed signal derived from the first filter to thereby output.the difference signal as a right channel output signal.
摘要翻译：立体声声像增强装置包括：第一滤波器，用于响应于左声道输入信号的频率改变左声道输入信号的相位; 第二滤波器，用于响应于右声道输入信号的频率改变右声道输入信号的相位; 第一计算装置，用于计算左声道输入信号和从第二滤波器导出的相位改变信号之间的差，从而输出差信号作为左声道输出信号; 以及第二计算装置，用于计算右声道输入信号和从第一滤波器导出的相位改变信号之间的差，从而输出差分信号作为右声道输出信号。

4. 发明授权

US6091894A Virtual sound source positioning apparatus 失效
标题翻译：虚拟声源定位装置
公开(公告)号：US6091894A
公开(公告)日：2000-07-18
申请号：US766713
申请日：1996-12-13
申请人： Akihiro Fujita , Kenji Kamada , Kouji Kuwano
发明人： Akihiro Fujita , Kenji Kamada , Kouji Kuwano
IPC分类号： H04S1/00 , H04S7/00 , G06G7/62 , H04S5/00
CPC分类号： H04S1/002 , H04S1/005
摘要： A virtual sound source positioning apparatus includes a channel signal generating section for generating first and second channel signals, a first component signal indicative of a component of the first channel signal, and a second component signal indicative of a component of the second channel signal from an audio input signal, a control section including a low pass filter, for generating a difference signal associated with a difference between the first component signal and the second component signal, filtering the difference signal by the low pass filter to generate a filtered difference signal, and for generating a first audio image control signal from the filtered difference signal and the first channel signal, and a second audio image control signal from the second channel signal and the filtered difference signal, and a sound output section for positioning a virtual sound source in accordance with the first and second audio image control-signals. The difference signal may be generated by multiplying the first and second component signals by predetermined coefficients, and the filtered difference signal may be delayed in accordance with the difference signal transfer paths to the ears of a listener. The first and second channel signals can be generated using two head acoustic transfer functions. In this case, an IIR-type filter is used to generate a direct sound signal and an IIR-type filter and a FIR-type filter connected thereto in series are used to generate a reflection signal.
摘要翻译：虚拟声源定位装置包括：信道信号产生部分，用于产生第一和第二信道信号，指示第一信道信号的分量的第一分量信号和指示来自第一信道信号的分量的第二分量信号音频输入信号，包括低通滤波器的控制部分，用于产生与第一分量信号和第二分量信号之间的差相关的差分信号，通过低通滤波器对差分信号进行滤波以产生滤波差分信号;以及用于从所述经滤波的差分信号和所述第一声道信号产生第一音频图像控制信号，以及来自所述第二声道信号和滤波的差分信号的第二音频图像控制信号，以及用于根据具有第一和第二音频图像控制信号。可以通过将第一和第二分量信号乘以预定系数来产生差分信号，并且滤波的差分信号可以根据到收听者的耳朵的差分信号传递路径被延迟。可以使用两个头部声学传递函数来生成第一和第二信道信号。在这种情况下，使用IIR型滤波器来产生直接声音信号，并且使用IIR型滤波器和串联连接到其上的FIR型滤波器来产生反射信号。

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