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公开(公告)号：US4188504A
公开(公告)日：1980-02-12
申请号：US899892
申请日：1978-04-25
申请人： Masao Kasuga , Nobuaki Takahashi , Masaaki Sato , Kohji Seki , Toshinori Mori , Makoto Iwahara
发明人： Masao Kasuga , Nobuaki Takahashi , Masaaki Sato , Kohji Seki , Toshinori Mori , Makoto Iwahara
CPC分类号： H04S5/00 , H04S7/30 , H04S2400/11
摘要： A binaural signal processing circuit comprising a first system for imparting an input signal with a transfer characteristic equal to the transfer characteristic hL(t; .theta., r) from a sound source to the left ear of a listener, where .theta. represents an angle between the front direction of the listener and the sound source, and r represents a distance between the sound source and the listener, a second system for imparting the input signal with a transfer characteristic equal to the transfer characteristic hR(t; .theta., r) from the sound source to the right ear of the listener, a system for variably controlling the transfer functions of the first and second transfer function imparting systems, and a further system for deriving binaural signals from the first and second transfer function imparting systems.
摘要翻译： 一种双耳信号处理电路，包括：第一系统，用于赋予输入信号具有等于从收听者的声源到左耳的传递特性hL（t; theta，r）的传递特性，其中θ表示 收听者的前方向和声源，r表示声源与收听者之间的距离，第二系统用于赋予输入信号具有等于来自该音源的传送特性hR（t; theta，r）的传递特性 声源到收听者的右耳，用于可变地控制第一和第二传递函数赋予系统的传递函数的系统，以及用于从第一和第二传递函数赋予系统导出双耳信号的另一系统。
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公开(公告)号：US4143244A
公开(公告)日：1979-03-06
申请号：US752964
申请日：1976-12-21
申请人： Makoto Iwahara , Fumio Maruyama , Goro Fujiki , Toshinori Mori , Norio Hiyama , Mitsuru Kikuchi
发明人： Makoto Iwahara , Fumio Maruyama , Goro Fujiki , Toshinori Mori , Norio Hiyama , Mitsuru Kikuchi
CPC分类号： H04S1/005
摘要： A binaural sound reproducing system includes a transducer for translating the recorded binaural information into an electrical signal on each of separate channels and a convolution integrator on each separate channel connected to receive the output from the transducer to compensate for acoustical differences resulting from the facial difference between the dummy head used for recording the binaural signal and a particular listener.
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公开(公告)号：US4118599A
公开(公告)日：1978-10-03
申请号：US772149
申请日：1977-02-25
申请人： Makoto Iwahara , Toshinori Mori
发明人： Makoto Iwahara , Toshinori Mori
摘要： A stereophonic sound reproduction system comprises a first signal converter receptive of an audio signal for converting it into a binaural signal containing information as to the localization of the original sound source at a desired location in a listening area, and a second signal converter for converting the binaural signal into a signal containing no acoustic components which would produce the effect of crosstalk between listener's ears when the signal is reproduced in the listening area. A sound field expansion system is also disclosed which includes a converter which processes an input signal for generating an acoustic signal which localizes virtual sound sources so that the listener is given the impression of an expanded listening area.
摘要翻译： 立体声声音再现系统包括接收音频信号的第一信号转换器，用于将其转换为包含关于原始声源在收听区域中的期望位置处的定位的信息的双耳信号;以及第二信号转换器，用于转换 双耳信号转换成不包含声音分量的信号，当在收听区域中再现信号时，这将产生听众耳朵之间串扰的影响。 还公开了一种声场扩展系统，其包括转换器，该转换器处理用于产生定位虚拟声源的声信号的输入信号，从而给予收听者更大的收听区域的印象。
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4.发明授权Acoustic translation of quadraphonic signals for two- and four-speaker sound reproduction 失效用于双扬声器声音再现的四声道信号的声学平移
公开(公告)号：US4159397A
公开(公告)日：1979-06-26
申请号：US903774
申请日：1978-05-05
申请人： Makoto Iwahara , Toshinori Mori
发明人： Makoto Iwahara , Toshinori Mori
CPC分类号： H04S1/002
摘要： Each of quadraphonic signals is applied to a respective one of a plurality of binaural localization networks to deliver a pair of binaurally correlated output signals to a respective one of a plurality of crosstalk cancellation networks where the input signals are modified so as to eliminate acoustic crosstalk which might be perceived by a listener if the non-modified signals were directly used to produce sound waves. The output signals from each crosstalk cancellation network are a pair of crosstalk-free signals which are combined in adders with signals from the other crosstalk cancellation networks to deliver a plurality of localized output signals to loudspeakers. The localization networks are so adjusted to make the localized output signals to appear to originate from anywhere in front of a listener.
摘要翻译： 每个四声信号被施加到多个双耳定位网络中的相应一个，以将一对双耳相关的输出信号递送到多个串扰消除网络中的相应一个，其中输入信号被修改，以便消除声串扰 如果未修改的信号直接用于产生声波，则可能被听众感知到。 来自每个串扰消除网络的输出信号是一对无串扰的信号，其在加法器中与来自其他串扰消除网络的信号组合以将多个局部输出信号传送到扬声器。 定位网络进行了如此调整，使本地化的输出信号似乎来自于收听者前面的任何地方。
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公开(公告)号：US4060696A
公开(公告)日：1977-11-29
申请号：US697122
申请日：1976-06-17
申请人： Makoto Iwahara , Fumio Maruyama , Goro Fujiki , Toshinori Mori , Norio Hiyama , Mitsuru Kikuchi
发明人： Makoto Iwahara , Fumio Maruyama , Goro Fujiki , Toshinori Mori , Norio Hiyama , Mitsuru Kikuchi
CPC分类号： H04S5/02 , H04R5/027 , H04S3/00 , H04S1/00 , H04S2400/01
摘要： A binaural four-channel stereophony comprises at least two dummy heads each provided with microphones at the ears of the dummy to pick up signals from various sound sources or groups of sound sources. The binaural signals representing each sound source or a group of sound sources are coupled to an acoustic crosstalk cancellation circuit and eventually applied to two front or two rear loudspeakers. Each sound source or group of sound sources is localized between adjacent ones of the four speakers to simulate the binaural effect produced in a closed-circuit type binaural sound reproducing system.
摘要翻译： 双耳四通道立体声包括至少两个虚拟头，每个哑头在虚拟的耳朵处设有麦克风，以拾取来自各种声源或声源组的信号。 表示每个声源或一组声源的双耳信号被耦合到声学串扰消除电路，并且最终应用于两个前置或两个后部扬声器。 每个声源或一组声源被定位在四个扬声器的相邻的扬声器之间，以模拟在闭路型双耳声音再现系统中产生的双耳效果。
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6.发明授权
公开(公告)号：US4739418A
公开(公告)日：1988-04-19
申请号：US840588
申请日：1986-03-17
CPC分类号： G11B21/085 , G11B27/3054 , H04N5/7605 , H04N5/9205 , G11B2220/20 , Y10S358/907
摘要： An information signal recording disc is recorded with a stereoscopic television signal comprising a stereoscopic video signal and audio signals. The disc comprises a spiral track made up of a plurality of track turns, and video signals related to four fields are recorded on each of the plurality of track turns. Each track turn is time-sequentially recorded with right-eye and left-eye video signals of mutually different field numbers out of the right-eye and left-eye video signals of a simultaneous stereoscopic television signal in a sequence of field numbers together with audio signals, so that the right-eye video signal and the left-eye video signal are respectively recorded for a time period of two fields in each track turn. The right-eye and left-eye video signals related to identical fields are recorded side by side to each other in two mutually adjacent track turns. A predetermined sequence with which the right-eye and left-eye video signals are recorded on the spiral track is repeated with a period of eight fields.
摘要翻译： 用包括立体视频信号和音频信号的立体电视信号记录信息信号记录盘。 盘包括由多个轨道匝组成的螺旋轨道，并且与多个轨道匝中的每一个记录有与四个场相关的视频信号。 时间顺序地记录具有相同不同场号的右眼和左眼视频信号的时间顺序记录在场序列中的同时立体电视信号的右眼和左眼视频信号以及音频 信号，使得右眼视频信号和左眼视频信号分别在每个轨道转弯中记录两个场的时间段。 与相同场相关的右眼和左眼视频信号在两个相互相邻的轨道匝中彼此并排记录。 以8个字段的周期重复在螺旋轨道上记录右眼和左眼视频信号的预定顺序。
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公开(公告)号：US4137510A
公开(公告)日：1979-01-30
申请号：US888561
申请日：1978-03-20
申请人： Makoto Iwahara
发明人： Makoto Iwahara
摘要： A frequency band dividing filter comprises at least two unit circuits connected in cascade connection of at least two stages, and at least one supplemental delay circuit. Each of the unit circuits comprises a low-pass filter having a specific filtering frequency band with a steep cut-off characteristic, a delay circuit connected in parallel with said low-pass filter and having a frequency phase characteristic substantially equal to the frequency phase characteristic of said low-pass filter in the pass band thereof, and a subtraction circuit connected to the output sides of said low-pass filter and said delay circuit thereby to carry out subtraction of the outputs of said low-pass filter and said delay circuit. The supplemental delay circuit is connected in parallel with the second stage unit circuit, which is connected to the first stage unit circuit in cascade connection, and has the same characteristic as the characteristic of the delay circuit of the second stage unit circuit.
摘要翻译： 频带分割滤波器包括至少两个连接在至少两级的级联中的单元电路和至少一个辅助延迟电路。 每个单元电路包括具有陡峭截止特性的特定滤波频带的低通滤波器，与所述低通滤波器并联连接并具有基本上等于频率相位特性的频率相位特性的延迟电路 的所述低通滤波器和所述延迟电路的输出相减，所述减法电路连接到所述低通滤波器的输出侧和所述延迟电路，从而执行所述低通滤波器和所述延迟电路的输出的相减。 补充延迟电路与第二级单元电路并联连接，第二级单元电路以级联方式连接到第一级单元电路，并且具有与第二级单元电路的延迟电路的特性相同的特性。
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公开(公告)号：US4628525A
公开(公告)日：1986-12-09
申请号：US709209
申请日：1985-03-07
申请人： Makoto Iwahara , Hiroshi Ogawa
发明人： Makoto Iwahara , Hiroshi Ogawa
摘要： An M-S type stereophonic microphone comprises a mid microphone unit having a main axis thereof directed to the front of the M-S type stereophonic microphone, a side microphone unit having a main axis thereof directed to the side of the M-S type stereophonic microphone and perpendicular to the direction of the main axis of the mid microphone unit, a unit support body for unitarily supporting the mid and side microphone units, a main microphone body frame, and a resilient support mechanism comprising resilient support members for resiliently supporting the unit support body on the frame. The resilient support mechanism resiliently supports the unit support body so that the unit support body is movable in the main axis direction of the mid microphone unit and in the main axis direction of the side microphone unit.
摘要翻译： MS型立体声麦克风包括具有主轴指向MS型立体声麦克风前部的中麦克风单元，侧麦克风单元，其主轴指向MS型立体声麦克风侧并垂直于方向 中间麦克风单元的主轴线，用于一体地支撑中间和侧面麦克风单元的单元支撑体，主麦克风主体框架和弹性支撑机构，其包括弹性支撑构件，用于将单元支撑体弹性地支撑在框架上。 弹性支撑机构弹性地支撑单元支撑体，使得单元支撑体可在中间麦克风单元的主轴线方向和侧麦克风单元的主轴线方向上移动。
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公开(公告)号：US4559642A
公开(公告)日：1985-12-17
申请号：US524777
申请日：1983-08-19
申请人： Naotaka Miyaji , Atsushi Sakamoto , Makoto Iwahara
发明人： Naotaka Miyaji , Atsushi Sakamoto , Makoto Iwahara
CPC分类号： H04R3/005 , G10K11/346 , H04R1/406
摘要： A phased-array sound pickup apparatus has an array of directional microphones having individual directivity patterns equally oriented in a given direction. The directivity patterns of the microphones combine into the main lobe of the array. A plurality of variable delay circuits are connected to be responsive respectively to individual signals from the microphones for providing incremental delays to the individual signals and combining the delayed signals for delivery as an output of the apparatus. A delay control circuit is coupled to the variable delay circuits for generating a delay control signal for controlling the amount of the incremental delays to cause the main lobe to be steered at an angle to the given direction as a function of the delay control signal.
摘要翻译： 相控阵拾音装置具有定向麦克风阵列，其具有在给定方向上等同取向的各个方向性图案。 麦克风的方向性图案组合成阵列的主瓣。 连接多个可变延迟电路以分别响应来自麦克风的各个信号，以向各个信号提供增量延迟，并组合延迟的信号作为装置的输出。 延迟控制电路耦合到可变延迟电路，用于产生用于控制增量延迟量的延迟控制信号，以使主瓣以与延迟控制信号的函数成一定角度转向给定方向。
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公开(公告)号：US4349698A
公开(公告)日：1982-09-14
申请号：US160543
申请日：1980-06-18
申请人： Makoto Iwahara
发明人： Makoto Iwahara
摘要： Spatially correlated input audio signals are combined in a first combination of adder and subtracter to produce an input summation signal and an input difference signal, which are respectively translated by first and second filter circuits. The transfer function of the first filter circuit describes the relationship between the input summation signal and a summation of output audio signals and the transfer function of the second filter circuit describes the relationship between the input difference signal and a difference between the output audio signals. The translated signals are combined in a second combination of adder and subtracter to produce the output audio signals. Each of the filter circuits is designed with a minimum amount of phase shift which allows elimination of delay elements.
摘要翻译： 空间相关的输入音频信号在加法器和减法器的第一组合中组合以产生分别由第一和第二滤波器电路转换的输入求和信号和输入差分信号。 第一滤波器电路的传递函数描述输入和信号与输出音频信号的和的关系，第二滤波器电路的传递函数描述输入差分信号与输出音频信号之间的差值之间的关系。 转换的信号以加法器和减法器的第二组合组合以产生输出音频信号。 每个滤波器电路被设计为具有最小量的相移，其允许消除延迟元件。
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