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11. 发明授权

US06721426B1 Speaker device 失效
标题翻译：扬声器装置
公开(公告)号：US06721426B1
公开(公告)日：2004-04-13
申请号：US09694976
申请日：2000-10-24
申请人： Hirofumi Kurisu , Yuji Yamada
发明人： Hirofumi Kurisu , Yuji Yamada
IPC分类号： H04M1100
CPC分类号： H04R3/00
摘要： A signal processor with a small circuit size, a simplified arrangement, and reduced cost and which can generate the same sound field as that in a case of listening to a reproduced sound using speakers to a location outside of a head of the listener has FIR filters and reverberation adding circuits. At an addition point provided to a tap midpoint of one FIR filter, a delay output signal of a tap end from another FIR filter is multiplied by a predetermined multiplication coefficient and then added. Output of one FIR filter is subjected to reverberation adding processing by the reverberation adding circuits and then output of yet another FIR filter is added to the above output to obtain an output signal. Therefore, even if the FIR filters with short tap lengths are used, long impulse response can be reproduced and a scale of signal processing can be reduced substantially.
摘要翻译：具有小电路尺寸，简化布置和降低成本的信号处理器，并且可以产生与使用扬声器收听再现声音到收听者头部之外的位置相同的声场的FIR滤波器和混响加法电路。在提供给一个FIR滤波器的抽头中点的加法点处，将来自另一个FIR滤波器的抽头端的延迟输出信号乘以预定的乘法系数，然后相加。一个FIR滤波器的输出由混响加法电路进行混响加法处理，然后将另一个FIR滤波器的输出添加到上述输出以获得输出信号。因此，即使使用具有短抽头长度的FIR滤波器，可以再现长脉冲响应，并且可以显着降低信号处理的规模。

12. 发明授权

US6108430A Headphone apparatus 失效
标题翻译：耳机设备
公开(公告)号：US6108430A
公开(公告)日：2000-08-22
申请号：US381961
申请日：1999-09-30
申请人： Hirofumi Kurisu
发明人： Hirofumi Kurisu
IPC分类号： H04R5/033 , H04S1/00 , H04S3/00 , H04S7/00 , H04R5/02 , H04R1/10
CPC分类号： H04S7/304 , H04R5/033 , H04S1/007 , H04S2400/01 , H04S2420/01
摘要： A signal processing circuit for performing predetermined signal processes to input audio signals of four channels, headphones to which an output signal of the signal processing circuit is supplied, and detecting method for detecting a rotation of the head of the listener are provided. Digital filters for convoluting impulse responses obtained by converting head portion transfer functions from sound sources to the right and left ears into time regions to the input audio signals of four channels, time-difference adding circuits, and level-difference adding circuits are provided in the signal processing circuit. In the adding circuits, a time difference and a level difference of the signals which are transmitted through the adding circuits are controlled in accordance with detection outputs of the detecting method.
摘要翻译： PCT No.PCT / JP99 / 00425 Sec。 371 1999年9月30日第 102（e）1999年9月30日PCT提交1999年2月2日PCT公布。 WO99 / 40756 PCT公开号日期1999年8月12日一种信号处理电路，用于执行预定信号处理以输入四个声道的音频信号，提供信号处理电路的输出信号的耳机和用于检测收听者头部的旋转的检测方法提供。数字滤波器用于通过将头部传递函数从声源转换为左耳到左耳到时间区域获得的卷积脉冲响应，提供给四个通道的输入音频信号，时差添加电路和电平差加法电路。信号处理电路。在加法电路中，根据检测方法的检测输出来控制通过加法电路发送的信号的时间差和电平差。

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