公开(公告)号：JPH04150200A

公开(公告)日：1992-05-22

申请号：JP27090190

申请日：1990-10-09

Applicant: YAMAHA CORP

Inventor： IWAMATSU MASAYUKI

IPC: H04S5/02 ,  G10K15/12 ,  H04S5/00 ,  H04S7/00

Abstract: PURPOSE:To realize a sense of surrounding as if to surround a listener by generating a reflecting sound from a main signal and a surround signal separately based on a reflection sound parameter of a sound field and outputting them through synthesis. CONSTITUTION:A main signal M and a surround signal S are generated from two left/right channel signals L,R inputted from input terminals 12,14. Then a main sound field signal generating means 32 based on a reflection sound parameter P1 gives a 1st sound field to the main signal M and a surround sound field signal generating means 54 base on a reflection parameter P2 gives a 2nd sound field to the surround signal S and a main sound field signal Mo and a surround sound field signal So comprising the collection of the relection sound signals in each direction in each sound field are generated and the signals of channels corresponding to each other are synthesized and outputted as a sound field signal. Thus, a sense of surrounding as if to surround a listener 38 is obtained.

公开(公告)号：JPS64899A

公开(公告)日：1989-01-05

申请号：JP15577887

申请日：1987-06-23

Applicant: YAMAHA CORP

Inventor： IWAMATSU MASAYUKI

IPC: H04S5/02

Abstract: PURPOSE:To reproduce directivity in respect of a backward sound as well and to improve the attendance feeling and in addition, to simplify a constitution, by controlling the respective outputs of a rear left and a rear right speakers according to the height of the level of two-channel stereoscopic input signals. CONSTITUTION:Level control means 5L, 5R which control respectively the level quantity of signals to be supplied to respective speakers are provided between a delay circuit 3 and the rear left and the rear right channel speakers LR, RR, and the level quantity of them is controlled by the output signal of a level detection circuit 7. The detection circuit 7 inputs respectively the two- channel stereoscopic input signals L, R from terminals 1L, 1R, and outputs respectively the signals of L/R proportion and R/L proportion. The difference signal L-R, and further, the signal through the delay circuit 3 are inputted respectively to voltage control amplifiers 51L, 51R, and a four-channel stereoscopic rear left and rear right output signals are controlled according to the signals from the detection circuit 7.

公开(公告)号：JPS63211908A

公开(公告)日：1988-09-05

申请号：JP4487887

申请日：1987-02-27

Applicant: YAMAHA CORP

Inventor： IWAMATSU MASAYUKI

IPC: H03M1/18 ,  H03G1/00 ,  H03G3/02

Abstract: PURPOSE:To prevent the signal clip due to overflow by providing an electronic volume before and after a digital signal processing section and setting the volume of the post-stage to make through in setting the overall gain to be -g (a gain not overflowed)) or over and setting the volume of the pre-stage to make through when the overall gain is set below the gain -g. CONSTITUTION:In the case of the overall gain of 0--gdB, the volumes 20, 38 and 24, 36 are selected to make through and the volume 30 is controlled. The clipping of the signal waveform due to overflow of a digital signal processing section 14 is prevented against the input of the range from a level lower than the reference level by -gdB to the reference level to prevent the decrease in the permissible input. In the case of the overall gain of -g--infinity dB, the volumes 20, 38 are set to make through and the volume 30 is set respectively to -gdB to control the volumes 24, 36. Since a head margin of -gdB is formed to the digital signal processing section 32, the signal is inputted up to the reference level without being clipped and the decrease in the permissible input is prevented.

公开(公告)号：JPS6387000A

公开(公告)日：1988-04-18

申请号：JP23014386

申请日：1986-09-30

Applicant: YAMAHA CORP

Inventor： IWAMATSU MASAYUKI

IPC: H03G5/02 ,  G10K15/08 ,  H03G3/00 ,  H03G5/00 ,  H04S3/00 ,  H04S5/02 ,  H04S7/00

Abstract: PURPOSE:To instantaneously reproduce a control state dealing with multidimension and to faithfully reproduce a sound field through a simple operation by combining both a parameter setting a sound field characteristic added to a source reproduction sound and a parameter controlling the frequency characteristic of the sound so as to store them and simultaneously calling them. A CONSTITUTION:An acoustic signal is inputted to a digital equalizer 1. It can freely set parameters for central frequency, Q, level and cut-off frequency. The output of the equalizer 1 is inputted to a sound field processor 2. It convolutionally operates reflected sound data stored in a reflected sound pattern memory 3 and an input signal, and generates a sound field effect signal. A memory 5 combines and stores the parameter that the equalizer 1 sets and the parameter of another reflected sound data, which is obtained by modifying the parameter of the reflection sound data. According to instructions from a CPU, those parameters are simultaneously called, and they control the equalizer 1 and the processor 2. Thus the control state handling multidimension such as time, space and frequency characteristics can be reproduced instantaneously, and a sound field can be faithfully reproduced through the simple operation.

公开(公告)号：JPS6386907A

公开(公告)日：1988-04-18

申请号：JP23014086

申请日：1986-09-30

Applicant: YAMAHA CORP

Inventor： IWAMATSU MASAYUKI

IPC: H03G3/02 ,  H03G3/00 ,  H03G3/20 ,  H03G5/16

Abstract: PURPOSE:To make it unnecessary to provide a sound volume adjusting means on every input source, by providing an input level storage means for storing an input level adjustment quantity set value of every input source, a level control means, and a means for reading out the corresponding input level adjustment quantity set value from the level storage means in accordance with a selection of the input source, and controlling the level control means. CONSTITUTION:A CPU 6 selects and outputs the corresponding source signal from an input selector 5, based on a source selection data by a source selection key. Subsequently, the CPU 6 reads out a data related to a source selected from in input level adjustment quantity set values of each input source, which have been stored in a preset level memory 9. By operating this value and a manipulated variable of a main volume, etc., a level adjustment quantity is derived, and it is inputted as a command value to a gain control means 13. The gain control means 13 adjusts the gain of level control means 7, 8 so that it becomes an output level corresponding to this command value. In this way, even if the input source is switched, an equal output level is always obtained, and it becomes unnecessary to adjust a master volume.

公开(公告)号：JP2011066727A

公开(公告)日：2011-03-31

申请号：JP2009216337

申请日：2009-09-18

Applicant: Yamaha Corp ,  ヤマハ株式会社

Inventor： IWAMATSU MASAYUKI

IPC: H03F1/02 ,  H03F3/181

CPC classification number: H03F3/303 ,  H03F1/0233 ,  H03F3/185 ,  H03F2200/511

Abstract: PROBLEM TO BE SOLVED: To further improve output efficiency of electric power in an amplifying apparatus. SOLUTION: The amplifying apparatus 1 includes an amplifying unit 100A for outputting an input signal Vin after performing voltage amplification, an output unit 100B for supplying an output signal Vout to a load 400 after performing current amplification about an output of the amplifying unit 100A, a high voltage power line L1 to which a high voltage Va is supplied, a low voltage power line L2 to which a low voltage Vb is supplied, a control unit 200, and a power supply 300 for supplying the high voltage Va and the low voltage Vb. The control unit 200 produces a control signal CTL for indicating which is to be selected from a first voltage Vb1 and a second voltage Vb2 in response to a signal level of the output signal Vout. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：为了进一步提高放大装置中的电力的输出效率。 解决方案：放大装置1包括用于在执行电压放大之后输出输入信号Vin的放大单元100A，用于在对放大单元的输出执行电流放大之后将负载400提供给负载400的输出单元100B 100A，供给高电压Va的高电压电力线L1，供给低电压Vb的低电压电力线L2，控制部200以及供给高电压Va的电源300和 低电压Vb。 控制单元200根据输出信号Vout的信号电平产生用于指示从第一电压Vb1和第二电压Vb2选择的控制信号CTL。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2011035661A

公开(公告)日：2011-02-17

申请号：JP2009179854

申请日：2009-07-31

Applicant: Yamaha Corp ,  ヤマハ株式会社

Inventor： IWAMATSU MASAYUKI

IPC: H04R3/00 ,  H04B1/10

CPC classification number: H04R3/007

Abstract: PROBLEM TO BE SOLVED: To reduce intrinsic noise that occurs at switching with a voice signal switching means, relating to a voice reproduction system which has a configuration for reproduction by an electric acoustic converter through a low-cut filter that cuts off lower band of voice signal frequencies after going through the voice signal switching means.
SOLUTION: A variable low-cut filter 22 is arranged on a front side of a voice signal switching means 12. When no voice signal switching is performed, the cut off frequency of the variable low-cut filter 22 is set to be a low value so that the entire band of voice signal frequencies output from a voice source 10 is allowed to pass. In the case where the voice signal switching is performed, the cut off frequency of the variable low-cut filter 22 is temporarily changed to be a higher value before switching, and the value is restored to a lower value after switching.
COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：为了减少与语音信号切换装置的切换时发生的固有噪声，涉及具有通过电切换滤波器再现的配置的语音再现系统，该低频滤波器切断较低的 通过语音信号切换装置后的语音信号频带。 解决方案：可变低频滤波器22布置在语音信号切换装置12的前侧。当不执行语音信号切换时，可变低频滤波器22的截止频率被设置为 使得从语音源10输出的语音信号频率的整个频带被允许通过。 在执行语音信号切换的情况下，可变低通滤波器22的截止频率在切换之前暂时变为较高值，并且在切换之后该值被恢复为较低值。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2010034700A

公开(公告)日：2010-02-12

申请号：JP2008192603

申请日：2008-07-25

Applicant: Yamaha Corp ,  ヤマハ株式会社

Inventor： IWAMATSU MASAYUKI

IPC: H03G7/00

Abstract: PROBLEM TO BE SOLVED: To provide an audio signal processing apparatus including a DRC (Dynamic Range Compression) achieving also trouble countermeasures in large volume while preventing atmospheres of various contents from being lost and to provide a speaker system and a television. SOLUTION: In the television, a first level D1 and a second level D2 for regulating a first section, a second section and a third section in input/output characteristics set in a compression part are set to fixed values independently of the setting of a volume value Vol, compression ratios of the first section and the second section occupying most of an audio part of a movie are made different from each other independently of the setting of the volume value Vol, so that a range of the third section in which the compression ratio is changed according to the volume value Vol can be reduced. Thereby, an audio-visual environment having a higher flexibility corresponding to a reproducing condition can be constructed without remarkably losing movie producer's intentions, even when the television is viewed at any volume value Vol. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：为了提供包括DRC（动态范围压缩）的音频信号处理装置，其在大量的情况下也实现了大量的故障对策，同时防止各种内容的气氛被丢失并提供扬声器系统和电视机。 解决方案：在电视机中，用于调节设置在压缩部分中的输入/输出特性的第一部分，第二部分和第三部分的第一级D1和第二级D2独立于设置被设置为固定值 使卷积值Vol的第一部分和第二部分的压缩率占据电影的大部分音频部分，而与音量值Vol的设置无关，使得第三部分的范围在 可以减小压缩比根据体积值Vol而变化。 因此，即使在以任何音量值Vol。观看电视机的情况下，也可以构成具有与再现条件相对应的较高灵活性的视听环境，而不会显着地损失电影制作人的意图。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2009134128A

公开(公告)日：2009-06-18

申请号：JP2007310764

申请日：2007-11-30

Applicant: Yamaha Corp ,  ヤマハ株式会社

Inventor： IWAMATSU MASAYUKI

IPC: G10K15/12 ,  H04S5/02

CPC classification number: H04S7/305

Abstract: PROBLEM TO BE SOLVED: To provide an acoustic processing device and an acoustic processing method, capable of generating an initial reflected sound which can enhance a sound image by giving a sound source reinforcing effect, while maintaining stereophonic sensation. SOLUTION: The acoustic processing device 1, to which audio signals that are stereo signals are input, can generate a spatial reflected sound from an audio signal obtained by combining the audio signals of a right channel and of a left channel as a monophonic signal, and also generate an initial reflected sound from an audio signal that is a stereo signal. By generating the initial reflected sound from the stereophonic audio signal, a sound source reinforcing effect can be given, while maintaining a stereophonic feeling; and consequently, a sound that is richer and mellower than that generated from an audio signal that is a monophonic signal can be obtained. COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 要解决的问题：提供一种声音处理装置和声学处理方法，能够产生能够通过提供声源增强效果来提高声像的初始反射声，同时保持立体声感。 解决方案：输入立体声信号的音频信号的声音处理装置1可以从通过将右声道和左声道的音频信号组合为单声道而获得的音频信号产生空间反射声音 并且还从作为立体声信号的音频信号产生初始反射声音。 通过从立体声音频信号产生初始的反射声，可以保持声源的增强效果，同时保持立体声的感觉; 因此，可以获得比从单声道信号的音频信号产生的声音更丰富和更柔和的声音。 版权所有（C）2009，JPO＆INPIT

公开(公告)号：JP2008306270A

公开(公告)日：2008-12-18

申请号：JP2007149202

申请日：2007-06-05

Applicant: Yamaha Corp ,  ヤマハ株式会社

Inventor： IWAMATSU MASAYUKI

IPC: H03F1/02 ,  H03F3/21

Abstract: PROBLEM TO BE SOLVED: To reduce loss in a power amplifying circuit which drives a capacitive load.
SOLUTION: The power amplifying circuit comprises a pre-amplifying circuit 110 and a BTL-connected amplifying circuit 140 for amplifying input signals Vin and Vip, generating output signals, and driving a piezoelectric loudspeaker 120 as a capacitive load, and a control section 130. The control section 130 detects the frequency of the input or output signal and controls the voltage supplied to the BTL-connected amplifying circuit 140 according to the result of frequency detection and the output signal of the comparator 132.
COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 要解决的问题：减少驱动电容性负载的功率放大电路的损耗。 解决方案：功率放大电路包括预放大电路110和用于放大输入信号Vin和Vip的BTL连接放大电路140，产生输出信号，以及驱动压电扬声器120作为电容性负载，以及控制 控制部分130检测输入或输出信号的频率，并根据频率检测的结果和比较器132的输出信号控制提供给连接到BTL的放大电路140的电压。版权所有： （C）2009，JPO＆INPIT