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1.发明授权
公开(公告)号：US5164840A
公开(公告)日：1992-11-17
申请号：US400190
申请日：1989-08-28
申请人： Akihisa Kawamura , Masaharu Matsumoto , Mitsuhiko Serikawa , Ryo Tagami , Katsuaki Sato , Hiroko Yoshida , Hikari Hashimoto
发明人： Akihisa Kawamura , Masaharu Matsumoto , Mitsuhiko Serikawa , Ryo Tagami , Katsuaki Sato , Hiroko Yoshida , Hikari Hashimoto
CPC分类号： G11B20/00992 , G11B27/007 , G11B27/107 , G11B27/322 , G11B27/34 , H04N9/802 , H04S1/007
摘要： Control codes for controlling processing of an audio signal by a sound field variation circuit to produce desired sound fields are recorded on a monaural track of a video tape concurrent with recording of video and audio signals, and can thereby be subsequently played back for producing sound fields which are respectively synchronized with video images.
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公开(公告)号：US5144673A
公开(公告)日：1992-09-01
申请号：US623619
申请日：1990-12-07
摘要： A reflection sound compression apparatus extracts and compresses, most appropriately with a physical evaluation value, an impulse response of a hall, etc. which is obtained by calculation and actual experiments to reflection sounds in a number required by a sound field controller by using a learning identification method.
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公开(公告)号：US5233661A
公开(公告)日：1993-08-03
申请号：US687695
申请日：1991-04-19
摘要： A sound field is generated responsive to direct sound picked up by a direct-sound collecting microphone and indirect-sound picked up by an indirect-sound collecting microphone. Respective processing circuits are provided for signal processing the sound signals of the direct-sound collecting microphone and the indirect-sound collecting microphone. An adaptive filter is provided having a transfer function equal to a transfer function from a reproducing speaker to the indirect-sound collecting microphone. The output of the signal processing circuit associated with the indirect-sound collecting microphone is filtered by the adaptive filter, and the output of the adaptive filter is subtracted from the output of the indirect-sound collecting microphone. The output of the subtractor is then applied to the signal processing circuit associated with the indirect-sound collecting microphone for signal processing. The transfer function is initially set in the adaptive filter by applying an output of a signal generator thereto.
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公开(公告)号：US5123050A
公开(公告)日：1992-06-16
申请号：US596086
申请日：1990-10-11
CPC分类号： H04S1/002 , G10K15/08 , H03G5/165 , H03H17/0264 , H04S1/007
摘要： In the process of forming the effect sound for reproducing a sound field, a down-sampling part for reducing the sampling frequency of the digital signal is disposed before the step of the digital operation which becomes the central part of the forming process, by which a large amount of operation processing is carried out at a low sampling rate. With respect to the direct sound, processing such as gain adjustment is carried out without decreasing the sampling frequency. This results in a sound field control system which permits one to realize a higher quality and natural sound field control effect without significantly increasing the amount of hardware needed.
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公开(公告)号：US5073942A
公开(公告)日：1991-12-17
申请号：US645476
申请日：1991-01-24
CPC分类号： G10H1/0091 , G10H2210/301 , Y10S84/26
摘要： A sound field switcher inputs an output sound field signal from a sound field producer. The inputted sound field signal is delayed sequentially by plural delayers, after which they are multiplied by coefficients by plural multipliers, and the multiplied results are all added by an adder. Coefficients stored in an area of a memory indicated by a coefficient counter are read out and set to the plural multipliers. The sound field switcher carries out control of the timing for switching the sound field signal produced by the sound field producer and the timing for the coefficient counter to commence counting. Assuming the time required for switching the sound field to be N sampling periods, in case of carrying out a sound field switching from a sound field A to a sound field B, a sound field switching controller issues an order to the coefficient counter so as to count up one by one from 0 to N, and on each count the coefficients stored in an area of the coefficient memory is set to the multipliers. When the count value of the coefficient counter comes to (N/2) or nearest to (N/2), the sound field switching controller issues an order to the sound field producer to output the sound field signal of the sound field B. When the count value of the coefficient counter comes to N, the switching from the sound field A to the sound field B is completed.
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公开(公告)号：US5684881A
公开(公告)日：1997-11-04
申请号：US247269
申请日：1994-05-23
申请人： Mitsuhiko Serikawa , Ryou Tagami , Akihisa Kawamura , Masaharu Matsumoto , Mikio Oda , Hiroko Numazu
发明人： Mitsuhiko Serikawa , Ryou Tagami , Akihisa Kawamura , Masaharu Matsumoto , Mikio Oda , Hiroko Numazu
摘要： The apparatus of the invention calculates filter coefficients for controlling sound field and sound image, based on a plurality of first impulse response signals and a pair of second impulse response signals. The plurality of first impulse response signals indicate impulse responses from loudspeakers reproducing audio signals to both ears of a listener. The pair of second impulse response signals indicate impulse responses from a reference loudspeaker at a position at which a sound image is localized to both ears of the listener. The apparatus includes: a feature extracting section for receiving the pair of second impulse response signals, for extracting parameters representing features of the pair of second impulse response signals, and for outputting parameter signals; a signal adjusting section for adjusting at least one of the plurality of first impulse response signals based on the parameter signals, and for outputting a pair of third impulse response signals having the same features as the extracted features; and a coefficient calculating section for calculating the filter coefficients for controlling the sound field and sound image, based on the plurality of first impulse response signals and the pair of third impulse response signals applied from the signal adjusting means.
摘要翻译： 本发明的装置基于多个第一脉冲响应信号和一对第二脉冲响应信号来计算用于控制声场和声像的滤波器系数。 多个第一脉冲响应信号指示从再现音频信号的扬声器到听众的双耳的脉冲响应。 一对第二脉冲响应信号指示在声音图像被定位在收听者的两只耳朵的位置处的参考扬声器的脉冲响应。 该装置包括：特征提取部分，用于接收一对第二脉冲响应信号，用于提取表示该对第二脉冲响应信号的特征的参数，并用于输出参数信号; 信号调整部分，用于基于参数信号调整多个第一脉冲响应信号中的至少一个，并输出具有与提取的特征相同特征的一对第三脉冲响应信号; 以及系数计算部分，用于基于从信号调节装置施加的多个第一脉冲响应信号和一对第三脉冲响应信号，来计算用于控制声场和声像的滤波器系数。
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公开(公告)号：US5617478A
公开(公告)日：1997-04-01
申请号：US225602
申请日：1994-04-11
申请人： Ryou Tagami , Takeshi Norimatsu , Masaharu Matsumoto , Mikio Oda , Mitsuhiko Serikawa , Akihisa Kawamura , Hiroko Numazu
发明人： Ryou Tagami , Takeshi Norimatsu , Masaharu Matsumoto , Mikio Oda , Mitsuhiko Serikawa , Akihisa Kawamura , Hiroko Numazu
摘要： A sound reproduction system for automatically conducting a tone control for an audio signal according to the present invention includes: an input terminal for inputting an audio signal; a judgment circuit for determining a ratio between a stereophonic signal component and a monophonic signal component of the input audio signal and for outputting a judgment signal; a signal processing section for receiving the input audio signal and processing the input audio signal so as to generate an output signal having uniform transmission characteristics irrespective of the listening position; an adder for receiving the input audio signal and the output signal and for adding the input audio signal with the output signal at a certain addition ratio based on the judgment signal so as to generate an added signal; and a loudspeaker for receiving the added signal and for reproducing the added signal in a plurality of positions.
摘要翻译： 根据本发明的用于自动进行音频信号的音调控制的声音再现系统包括：用于输入音频信号的输入端; 用于确定所述输入音频信号的立体声信号分量和单声道信号分量之间的比率并用于输出判断信号的判断电路; 信号处理部分，用于接收输入音频信号并处理输入音频信号，以产生具有均匀传输特性的输出信号，而与收听位置无关; 加法器，用于接收所述输入音频信号和所述输出信号，并且用于基于所述判断信号以一定的相加比例将所述输入音频信号与所述输出信号相加以产生相加信号; 以及用于接收所附加的信号并用于在多个位置再现附加的信号的扬声器。
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公开(公告)号：US4751739A
公开(公告)日：1988-06-14
申请号：US921768
申请日：1986-10-22
CPC分类号： H03G5/165
摘要： A digital signal represents a desired amplitude frequency characteristic. A desired transmission characteristic is derived from the desired amplitude frequency characteristic. A sound signal is processed in accordance with the desired transmission characteristic. The processed sound signal is converted by a speaker into corresponding sound. The process of the sound signal corrects and compensates for the original sound pressure frequency characteristic of the speaker and thereby actualizes the desired amplitude frequency characteristic.
摘要翻译： 数字信号表示期望的振幅频率特性。 从期望的幅度频率特性导出期望的传输特性。 根据期望的传输特性来处理声音信号。 经处理的声音信号由扬声器转换为相应的声音。 声音信号的处理校正和补偿扬声器的原始声压频率特性，从而实现期望的振幅频率特性。
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公开(公告)号：US5381482A
公开(公告)日：1995-01-10
申请号：US12265
申请日：1993-02-01
申请人： Masaharu Matsumoto , Mitsuhiko Serikawa , Akihisa Kawamura , Hiroko Numazu , Takeshi Norimatsu , Ryo Tagami , Mikio Oda
发明人： Masaharu Matsumoto , Mitsuhiko Serikawa , Akihisa Kawamura , Hiroko Numazu , Takeshi Norimatsu , Ryo Tagami , Mikio Oda
CPC分类号： H04S1/002 , H04S7/305 , H04S1/007 , H04S2400/01 , H04S5/00
摘要： A sound field controller for generating apparent sound sources by adjusting the amplitude and delay time of a sound signal so that the sound will be perceived by plural listeners as sound coming from a location separated from the specific location of the front speakers, and for additionally controlling the effect of the apparent sound sources by evaluating the attributes of the source sound signal. The controller includes FIR filters for generating a left sound pattern signal, FIR filters for generating a right sound pattern signal, a first delay circuit for delaying the left and right sound pattern signals by a first predetermined time and applying the delayed left and right sound pattern signals to the left and right speakers, respectively, to introduce an apparent sound source located left rear of a center listener; and a second delay circuit for delaying the left and right sound pattern signals by a second predetermined time and applying the delayed left and right sound pattern signals to the right and left speakers, respectively, to introduce an apparent sound source located right rear of a center listener.
摘要翻译： 一种声场控制器，用于通过调节声音信号的幅度和延迟时间来产生视在声源，使得声音将被多个听众感知为来自与前置扬声器的特定位置分离的位置的声音，并且用于另外控制 通过评估源声音信号的属性来观察视声源的影响。 控制器包括用于产生左声音模式信号的FIR滤波器，用于产生右声音模式信号的FIR滤波器，用于将左右声音图形信号延迟第一预定时间的第一延迟电路，并将延迟的左右声音模式 分别向左右扬声器发出信号，引入位于中心听众左后方的明显声源; 以及第二延迟电路，用于将左右声音图形信号延迟第二预定时间，并将延迟的左右声音图案信号分别施加到左右扬声器，以引入位于中心右后方的表观声源 听众
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公开(公告)号：US5023913A
公开(公告)日：1991-06-11
申请号：US358282
申请日：1989-05-26
申请人： Masaharu Matsumoto , Katsuaki Satoh , Seiichi Ishikawa , Mitsuhiko Serikawa , Akihisa Kawamura , Hikari Hashimoto
发明人： Masaharu Matsumoto , Katsuaki Satoh , Seiichi Ishikawa , Mitsuhiko Serikawa , Akihisa Kawamura , Hikari Hashimoto
摘要： An apparatus for changing a sound field, comprising at least two signal processing means, which can smoothly and continuously switch a sound field into an arbitrary sound field without a break of signals by alternately switching one of the signal processing means into the other.
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