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11. 发明专利

JP2011029787A Signal processor 审中-公开
标题翻译：信号处理器
公开(公告)号：JP2011029787A
公开(公告)日：2011-02-10
申请号：JP2009171431
申请日：2009-07-22
申请人： Yamaha Corp , ヤマハ株式会社
发明人： ISHIJIMA KIYOSHI , MORISHIMA MORIHITO
IPC分类号： H03F1/32 , H03F3/217 , H03M3/02
摘要： PROBLEM TO BE SOLVED: To reduce the folding noise of a higher harmonic generated in nonlinear processing. SOLUTION: A signal processor 100 includes: an over-sampling circuit 20 for performing the over-sampling processing of PCM data Din sampled by a sampling frequency Fs; an interpolation circuit 30 for raising a sampling frequency to 128 Fs by interpolation processing; a slice circuit 40 for performing the slice processing of an output signal of the interpolation circuit 30; a noise shaper 50; and a PWM circuit 60. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：减少在非线性处理中产生的高次谐波的折叠噪声。解决方案：信号处理器100包括：用于执行由采样频率Fs采样的PCM数据Din的过采样处理的过采样电路20; 用于通过内插处理将采样频率提高到128Fs的内插电路30; 用于对插值电路30的输出信号进行片段处理的片电路40; 噪音整形器50; 和PWM电路60.版权所有（C）2011，JPO＆INPIT

12. 发明专利

JP2010233059A Amplifier circuit 审中-公开
标题翻译：放大器电路
公开(公告)号：JP2010233059A
公开(公告)日：2010-10-14
申请号：JP2009079642
申请日：2009-03-27
申请人： Yamaha Corp , ヤマハ株式会社
发明人： MORISHIMA MORIHITO
IPC分类号： H03F1/32
摘要： PROBLEM TO BE SOLVED: To provide an amplifier circuit that maintains an output power as much as possible while preventing clipping of output signals.
SOLUTION: The amplifier circuit includes: an amplification section (50) for amplifying a first signal to generate a second signal (Vo), and a characteristic correction section (20) for generating the first signal by performing or without performing frequency characteristic processing to all or a part of input signals (Vg) based on a state variable (VxTyp) that varies according to the state of the amplification section. In the figure, the characteristic correction section generates Vx=Vg, Vx=Vg', or Vx=G1×Vg'+ G2×Vg(0
摘要翻译：要解决的问题：提供尽可能保持输出功率同时防止输出信号削波的放大器电路。解决方案：放大器电路包括：用于放大第一信号以产生第二信号（Vo）的放大部分（50），以及用于通过执行或不执行频率特性来产生第一信号的特性校正部分（20）基于根据放大部分的状态而变化的状态变量（VxTyp）对全部或一部分输入信号（Vg）进行处理。在该图中，特征校正部根据由Vx得到的VxMAX之间的关系，生成Vx = Vg，Vx = Vg'或Vx = G1×Vg'+ G2×Vg（0

13. 发明专利

JP2009284072A Noise canceling circuit and headphone 审中-公开
标题翻译：噪音消除电路和耳机
公开(公告)号：JP2009284072A
公开(公告)日：2009-12-03
申请号：JP2008131970
申请日：2008-05-20
申请人： Yamaha Corp , ヤマハ株式会社
发明人： MORISHIMA MORIHITO
IPC分类号： H04R3/00 , G10K11/178 , H04B3/23 , H04R1/10 , H04R5/04
摘要： PROBLEM TO BE SOLVED: To suppress current consumption while suppressing the mounting area of a noise canceling circuit.
SOLUTION: The noise canceling circuit 50 includes: an A/D converting circuit 56 which converts an analog signal n1 output from a speaker 70 into a digital noise signal dn; a digital signal receiver 51 to which a multiplex digital audio signal dX with a first digital audio signal dL and a second digital audio signal dR multiplexed thereto is supplied from outside, and which separates and outputs one digital audio signal; a DSP which generates a driving digital signal dT by performing an arithmetic operation so as to cancel external noise; and a class D amplifying circuit 55 which drives the speaker 70 according to a control signal P having a pulse width corresponding to the driving digital signal dT.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：在抑制噪声消除电路的安装面积的同时抑制电流消耗。解决方案：噪声消除电路50包括：A / D转换电路56，其将从扬声器70输出的模拟信号n1转换为数字噪声信号dn; 数字信号接收器51从外部提供具有第一数字音频信号dL和第二数字音频信号dR的复用数字音频信号dX和第二数字音频信号dX，并分离并输出一个数字音频信号; DSP，其通过执行算术运算来产生驱动数字信号dT，以消除外部噪声; 和D类放大电路55，根据具有与驱动数字信号dT对应的脉冲宽度的控制信号P来驱动扬声器70。版权所有（C）2010，JPO＆INPIT

14. 发明专利

JP2009105703A Signal generator and d-class amplifier 有权
标题翻译：信号发生器和D类放大器
公开(公告)号：JP2009105703A
公开(公告)日：2009-05-14
申请号：JP2007276112
申请日：2007-10-24
申请人： Yamaha Corp , ヤマハ株式会社
发明人： MORISHIMA MORIHITO
IPC分类号： H03F3/217 , H03F1/26
CPC分类号： H03F3/217 , H03F3/2173
摘要： PROBLEM TO BE SOLVED: To set a sampling period to a sufficiently short time for a pulse period. SOLUTION: A noise shaping filter 12 suppresses quantization noise while generating a data series DTb obtained by arranging a plurality of data X (X[1], X[2], ...) by a sampling period Tns. A pulse width modulation circuit 14 contains signal generating parts 54[1], 54[2]. The signal generating parts 54[1] generates a pulse width modulation signal S1 in which a pulse P1 setting a time point of a front edge according to the data X[1] and setting a time point of a rear edge according to the data X[2] is disposed by a pulse period TP longer than the sampling period Tns. The signal generating part 54[2] generates a pulse width modulation signal S2 in which a pulse P2 setting a time point of the front edge according to the data X[3] and setting a time point of the rear edge according to the data X[4] is disposed between the respective pulses P1 of the pulse width modulation signal S1. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：将采样周期设置为足够短的脉冲周期时间。解决方案：噪声整形滤波器12抑制量化噪声，同时产生通过将多个数据X（X [1]，X [2]，...）排列在采样周期Tns上而获得的数据序列DTb。脉宽调制电路14包含信号产生部分54 [1]，54 [2]。信号产生部分54 [1]产生脉冲宽度调制信号S1，其中根据数据X [1]设置前沿时间点的脉冲P1，并根据数据X设置后沿的时间点 [2]通过长于采样周期Tns的脉冲周期TP来布置。信号生成部54 [2]生成脉冲宽度调制信号S2，脉冲P2根据数据X [3]设定前端的时间点，根据数据X设定后方的时间点 [4]设置在脉冲宽度调制信号S1的各个脉冲P1之间。版权所有（C）2009，JPO＆INPIT

15. 发明专利

JP2008125004A Class-d amplifier 有权
标题翻译： CLASS-D放大器
公开(公告)号：JP2008125004A
公开(公告)日：2008-05-29
申请号：JP2006309485
申请日：2006-11-15
申请人： Yamaha Corp , ヤマハ株式会社
发明人： NISHIOKA NAOTOSHI , MORISHIMA MORIHITO
IPC分类号： H03F1/00 , H03F3/217 , H03M5/08 , H03M7/32
摘要： PROBLEM TO BE SOLVED: To provide a data processing apparatus such as a class-D amplifier circuit reducing manufacturing costs by reducing a size and the number of components, and improving operability by facilitating waveform setting or adjustment with flexibility in constructing a system.
SOLUTION: A class-D amplifier 100 is adapted to generate cosine wave data with which an output voltage of an LPF 190 is not rapidly changed, as a PWM signal for the LPF 190 during a starting period or an ending period, apply noise shaping and modulate the cosine wave data into a PWM signal while selectively switching them with inputted data such as sound data to be amplified, and output the signal to the LPF 190.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供诸如D类放大器电路之类的数据处理装置，通过减小组件的尺寸和数量来减少制造成本，并且通过在构造系统方面具有灵活性便利波形设置或调整来提高可操作性。解决方案：D类放大器100适于产生余弦波数据，LPF 190的输出电压不会快速改变，因为LPF 190在开始周期或结束周期期间的PWM信号适用噪声整形并将余弦波数据调制成PWM信号，同时用输入的数据（例如待放大的声音数据）选择性地切换它们，并将信号输出到LPF 190.（C）2008，JPO＆INPIT

16. 发明专利

JP2008047290A Optical disk device 有权
标题翻译：光盘设备
公开(公告)号：JP2008047290A
公开(公告)日：2008-02-28
申请号：JP2007280860
申请日：2007-10-29
申请人： Yamaha Corp , ヤマハ株式会社
发明人： MORISHIMA MORIHITO
IPC分类号： G11B7/09 , G11B7/0045 , G11B7/125
摘要： PROBLEM TO BE SOLVED: To perform more accurate focus control even if a laser beam is applied to a region where no sufficient reflection light can be obtained on an optical disk. SOLUTION: An optical disk recording/reproducing device performs processing (step Sa7) for determining focus control content before recording, or the like when applying the laser beam to a region having a small reflection factor for recording/reproduction. In the focus control content determination process, a test laser beam is applied to a region (for example, the innermost periphery region) having a large reflection factor on an optical disk, and the focus control content is determined and stored in a memory, based on the focus control content executed at that time. Then, focus control according to the focus control content stored in the memory is executed, when applying laser beams to the region having a small reflection factor. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：即使在光盘上不能获得足够的反射光的区域上施加激光束，也可以进行更精确的聚焦控制。解决方案：当将光束施加到具有小的记录/再现反射系数的区域时，光盘记录/再现装置执行用于在记录之前确定聚焦控制内容的处理（步骤Sa7）。在焦点控制内容确定处理中，将测试激光束施加到在光盘上具有大的反射系数的区域（例如，最内周边区域），并且基于该存储器确定聚焦控制内容并存储在存储器中在当时执行的焦点控制内容上。然后，当将激光束施加到具有小的反射系数的区域时，执行根据存储在存储器中的聚焦控制内容的聚焦控制。版权所有（C）2008，JPO＆INPIT

17. 发明专利

JP2006238293A Class-d amplifier 审中-公开
标题翻译： CLASS-D放大器
公开(公告)号：JP2006238293A
公开(公告)日：2006-09-07
申请号：JP2005052990
申请日：2005-02-28
申请人： Yamaha Corp , ヤマハ株式会社
发明人： MORISHIMA MORIHITO
IPC分类号： H03F3/217
摘要： PROBLEM TO BE SOLVED: To provide a class-d amplifier which is capable of performing volume processing or feedback processing without performing analog conversion or multi-bit digital signal conversion upon a ΔΣ modulated bit stream.
SOLUTION: A data converting circuit 1 converts an "H" level of a ΔΣ modulated bit stream into data "+1" and converts an "L" level into data "-1". A multiplier 3 multiplies an output of the data converting circuit 1 by a volume value. A PLL 4 generates a clock pulse of multiplication of a clock pulse of the bit stream and outputs the clock pulse to a PWM (pulse width modulation) circuit 2. The PWM circuit 2 converts the output of the multiplier 3 into a PWM signal based on the clock pulse outputted from the PLL 4 and supplies the PWM signal to a load 6 via an output buffer amplifier 5.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供能够进行体积处理或反馈处理而不在ΔΣ调制比特流上进行模拟转换或多位数字信号转换的D类放大器。解决方案：数据转换电路1将ΔΣ调制比特流的“H”电平转换为数据“+1”，并将“L”电平转换为数据“-1”。乘法器3将数据转换电路1的输出乘以体积值。 PLL 4产生乘以比特流的时钟脉冲的时钟脉冲，并将时钟脉冲输出到PWM（脉冲宽度调制）电路2. PWM电路2将乘法器3的输出转换为基于从PLL4输出的时钟脉冲，并通过输出缓冲放大器5将PWM信号提供给负载6.版权所有（C）2006，JPO＆NCIPI

18. 发明专利

JP2006155897A Optical disk drive, focus control method and program 有权
标题翻译：光盘驱动，聚焦控制方法和程序
公开(公告)号：JP2006155897A
公开(公告)日：2006-06-15
申请号：JP2006075428
申请日：2006-03-17
申请人： Yamaha Corp , ヤマハ株式会社
发明人： MORISHIMA MORIHITO
IPC分类号： G11B7/095 , G11B7/0045 , G11B7/005
摘要： PROBLEM TO BE SOLVED: To perform more accurate focus control even when an area where reflected light on an optical disk cannot be sufficiently obtained is irradiated with a laser beam. SOLUTION: An optical disk recorder/player performs processing that decides focus control contents prior to recording or the like when recording and reproduction is performed by irradiating an area having small reflectance with the laser beam (a step Sa7). In focus control contents decision processing, an area (for example, innermost circumferential area) having large reflectance in the optical disk is irradiated with a test laser beam, and focus control contents are decided on the basis of focus control contents executed at that time and stored in a memory. when the area having small reflectance is irradiated with the laser beam, focus control is performed according to the focus control contents stored in the memory. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：即使当不能充分获得光盘上的反射光的区域时，也可以用激光束照射更精确的聚焦控制。解决方案：光盘记录器/播放器执行通过用激光束照射具有小反射率的区域进行记录再现时在记录之前等等的焦点控制内容的处理（步骤Sa7）。在聚焦控制内容决定处理中，用测试激光束照射在光盘中具有大反射率的区域（例如，最内圆周区域），并且基于当时执行的聚焦控制内容来确定聚焦控制内容，存储在内存中。当用激光束照射具有小反射率的区域时，根据存储在存储器中的聚焦控制内容进行聚焦控制。版权所有（C）2006，JPO＆NCIPI

19. 发明专利

JP2005341550A Class-d amplifier 有权
标题翻译： CLASS-D放大器
公开(公告)号：JP2005341550A
公开(公告)日：2005-12-08
申请号：JP2005127648
申请日：2005-04-26
申请人： Yamaha Corp , ヤマハ株式会社
发明人： MORISHIMA MORIHITO
IPC分类号： H03F1/32 , H03F3/217 , H03F3/38 , H03K5/13 , H03K5/131 , H03K7/08
CPC分类号： H03F3/217 , H03F1/3247 , H03F3/38 , H03F2200/331
摘要： PROBLEM TO BE SOLVED: To provide a class-D amplifier which can reduce distortions by digital processing, without using ADC.
SOLUTION: A PWM circuit 3 converts output data of a calculator 2 into a pulse width modulated signal, and outputs it to a load (speaker) 6 via a buffer amplifier 4 and a low-pass filter 5. A digital low-pass filter 7 has the same filter characteristics as those of the low-pass filter 5. An error calculator 8 calculates an error Δ(z) between the input data and the output of the filter 7, and outputs it to the calculator 2. The output of the filter 7 becomes a digital signal, having substantially the same waveform as that of an analog signal applied to the load 6, and also no distortion is contained in the digital signal. Accordingly, the output data Δ(z) of the error calculator 8 becomes the data, corresponding to the distortion of the output signal, and in the calculator 2, the data Δ(z) is subtracted from the input data, and the subtraction result is applied to the PWM circuit 3, to reduce the distortions.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种可以在不使用ADC的情况下通过数字处理减少失真的D类放大器。解决方案：PWM电路3将计算器2的输出数据转换为脉冲宽度调制信号，经由缓冲放大器4和低通滤波器5将其输出到负载（扬声器）6。滤波器7具有与低通滤波器5相同的滤波器特性。误差计算器8计算输入数据和滤波器7的输出之间的误差Δ（z），并将其输出到计算器2。滤波器7的输出变为具有与施加到负载6的模拟信号基本相同的波形的数字信号，并且也不会在数字信号中包含失真。因此，误差计算器8的输出数据Δ（z）成为与输出信号的失真对应的数据，在运算器2中，从输入数据中减去数据Δ（z），减法结果被施加到PWM电路3，以减少失真。版权所有（C）2006，JPO＆NCIPI

20. 发明专利

JP2005182859A Optical disk recording device 有权
标题翻译：光盘记录装置
公开(公告)号：JP2005182859A
公开(公告)日：2005-07-07
申请号：JP2003417988
申请日：2003-12-16
申请人： Yamaha Corp , ヤマハ株式会社
发明人： NAGANO HISASHI , MORISHIMA MORIHITO
IPC分类号： G11B23/40 , G11B7/00 , G11B7/0037 , G11B7/004 , G11B7/0045 , G11B7/24 , G11B20/12 , G11B23/38 , G11B27/034 , G11B27/10 , G11B27/32 , H04H1/00 , H04H60/27 , H04N5/76 , H04N5/765 , H04N5/781 , H04N5/85 , H04N5/92
CPC分类号： H04N5/76 , G11B7/0037 , G11B27/034 , G11B27/105 , G11B27/329 , G11B2220/218 , G11B2220/257 , H04H60/27 , H04N5/765 , H04N5/781 , H04N5/85 , H04N5/9201
摘要： PROBLEM TO BE SOLVED: To provide an optical disk recording device capable of performing play back of an optical disk without any problem even if a title and a content of a program image/sound-recorded in the optical disk are displayed on the optical disk. SOLUTION: A DVD recorder 1 acquires content information of a broadcasting program to be recorded in the optical disk from any of electronic program guide information (EPG) sent together with a broadcasting wave, a program information providing site provided via the Internet, or content information of a program recorded together with program data in the optical disk. The DVD recorder 1 forms a visible image displaying content information of the program whose image is recorded in an optical disk (DVD+R5) by a process for irradiating a data recording surface of the optical disk with a laser beam to form marks and spaces on a data recording surface of the optical disk. The DVD recorder 1 prints the content information of the program on a label surface of the optical disk by a label writer 21. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：为了提供一种能够无问题地执行光盘的回放的光盘记录装置，即使标题和节目图像的内容/记录在光盘中的内容被显示在光盘。解决方案：DVD记录器1从与广播波一起发送的电子节目指南信息（EPG），经由因特网提供的节目信息提供站点获取要记录在光盘中的广播节目的内容信息，或与光盘中的节目数据一起记录的节目的内容信息。 DVD记录器1通过用激光束照射光盘的数据记录表面的处理形成显示其图像被记录在光盘（DVD + R5）中的程序的内容信息的可见图像，以形成标记和空格光盘的数据记录表面。 DVD记录器1由标签写入器21在光盘的标签表面上打印程序的内容信息。（C）2005年，JPO和NCIPI

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