利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

24 条记录 (耗时 0.014 秒)

    Tone restoring apparatus
    2.
    发明公开
    Tone restoring apparatus 失效
    音调恢复装置

    公开(公告)号：EP0197758A3

    公开(公告)日：1988-07-13

    申请号：EP86302439

    申请日：1986-04-02

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Nakama, Yasutoshi ,  Misaki, Masayuki ,  Ishikawa, Seiichi

    IPC分类号： G11B27/00 ,  G11B20/00

    CPC分类号： G11B27/005 ,  G10L21/04 ,  G11B20/00007 ,  G11B2220/90

    摘要： In a tone-restoring apparatus, a first and a second hold circuit (4, 5) latch at a period of 2T data signals read from a digital memory (2) in response to a first and a second address supplied to the digital memory (2), and a first and second multiplier circuit multiply the data signals latched in the first and second hold circuit by a monotonously increasing weighting function W,(x) (0 ≤ x ≤ NT, 0 ≤ W 1 (x) ≤ 1) or a monotonously increasing weighting function W 2 (x) (0 ≤ x ≤ NT, 0 ≤ W 2 (x) ≤ 1). An adder circuit (8) adds the output signals from the first and second multiplier circuits to each other.

    Reverberator having tapped and recirculating delay lines
    3.
    发明公开
    Reverberator having tapped and recirculating delay lines 失效
    混响发生器与抽头延迟线和循环电流。

    公开(公告)号：EP0115215A2

    公开(公告)日：1984-08-08

    申请号：EP83308001.3

    申请日：1983-12-29

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Nakama, Yasutoshi ,  Watanabe, Koji

    IPC分类号： G10H1/06 ,  G10H1/043

    CPC分类号： G10K15/12 ,  G10H1/06 ,  G10H2210/281 ,  G10H2250/046 ,  Y10S84/04 ,  Y10S84/26

    摘要： A reverberator comprises a tapped delay line (2, 3, 4, 5, 10) connected to an analog audio signal source (1) for deriving therefrom at least one pair of output signals which are respectively delayed by first and second different values with respect to the source signal, the ratio of the first to second values being an irrational number. A recirculating delay line (6, 7, 11, 12) is connected to the output of the tapped delay line having a delay element (63, 73, 113, 123) for introducing an additional delay to the output signals of the tapped delay line and a resistive recirculating path (65, 75,115,125) for recirculating the additionally delayed signals through the delay element. The output of the recirculating delay line is combined with the source signal to derive a reverberating audio signal.

    Noise controller
    5.
    发明公开
    Noise controller 失效
    Lärmkontrollegerät。

    公开(公告)号：EP0590350A2

    公开(公告)日：1994-04-06

    申请号：EP93114166.7

    申请日：1993-09-03

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Terai, Kenichi ,  Nakama, Yasutoshi ,  Hashimoto, Hiroyuki ,  Tamura, Tadashi

    IPC分类号： G10K11/16

    CPC分类号： G10K11/178 ,  G10K2210/1282 ,  G10K2210/3012 ,  G10K2210/3032 ,  G10K2210/3045

    摘要： An active noise controller includes a prediction filter which comprises a delayer (3) for delaying the noise or error detection signal by a predetermined period of time, a first adaptive filter (4) for processing the output of the delayer to deliver its periodic component, and a subtractor (14) for subtracting the output of the first adaptive filter (4) from the noise detection signal to deliver a random component of the signal. More specifically, the prediction filter is capable of dividing the noise or error detection signal into two, periodic and random, components. In addition, two, second and third, adaptive filters (5,6) are provided for processing the periodic and random components respectively. Accordingly, the second and third adaptive filters (5,6) become responsive precisely to their respective periodic and random components regardless of the ratio in level between the two components, whereby any undesired noise consisting of the two discrete components will be suppressed.

    摘要翻译： 有源噪声控制器包括预测滤波器，该预测滤波器包括用于将噪声或误差检测信号延迟预定时间段的延迟器，用于处理延迟器的输出以递送其周期性分量的第一自适应滤波器，以及减法器 从噪声检测信号输出第一自适应滤波器以递送该信号的随机分量。 更具体地，预测滤波器能够将噪声或误差检测信号分成两个，周期性和随机的分量。 另外，提供两个，第二和第三个自适应滤波器用于分别处理周期性和随机分量。 因此，第二和第三自适应滤波器对于它们各自的周期性和随机分量而言都是精确地响应，而与两个分量之间的电平之比无关，由此将抑制由两个分立组件组成的任何不期望的噪声。

    Noise suppressor
    8.
    发明公开
    Noise suppressor 失效
    Lärmunterdrücker。

    公开(公告)号：EP0517525A2

    公开(公告)日：1992-12-09

    申请号：EP92305138.7

    申请日：1992-06-04

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Hashimoto, Hiroyuki ,  Terai, Kenichi ,  Nakama, Yasutoshi ,  Ogata, Hironari ,  Yano, Tomoe

    IPC分类号： G10K11/16

    CPC分类号： G10K11/178 ,  G10K2210/3012 ,  G10K2210/3028 ,  G10K2210/3045

    摘要： Disclosed is a noise suppressor in which a noise signal detected by a first detector (1 a ) is inputted to an adaptive filter (2) and a FIR filter (3). An output signal of the adaptive filter is reproduced by a speaker (5). The reproduced signal by the speaker (5) and a noise signal from a noise source are detected by a second detector (1 b ). The detected signal by the second detector is band-limited by a filter circuit (6) and sent to a LMS computing circuit (4). The LMS computing circuit (4) updates a coefficient of the adaptive filter (2) so as to minimize an output signal (e'(n)) of the filter circuit (6) in response to an output signal (r(n)) of the FIR filter (3) and an output signal (e'(n)) of the filter circuit (6).

    摘要翻译： 公开了一种噪声抑制器，其中由第一检测器检测的噪声信号被输入到自适应滤波器和FIR滤波器。 自适应滤波器的输出信号由扬声器再现。 扬声器的再现信号和来自噪声源的噪声信号由第二检测器检测。 由第二检测器检测到的信号被滤波器电路限幅并发送到LMS计算电路。 LMS计算电路更新自适应滤波器的系数，以便响应于FIR滤波器的输出信号和滤波器电路的输出信号使滤波器电路的输出信号最小化。

    Sound reproducing apparatus for use in vehicle
    10.
    发明公开
    Sound reproducing apparatus for use in vehicle 失效
    Schallwiedergabe-Apparat zur Anwendung在einem Fahrzeug。

    公开(公告)号：EP0252522A2

    公开(公告)日：1988-01-13

    申请号：EP87110010.3

    申请日：1987-07-10

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Terai, Kenichi ,  Saiki, Shuji ,  Murata, Kosaku ,  Satoh, Katsuaki ,  Kimura, Yoichi ,  Nakama, Yasutoshi ,  Ogawa, Michiko ,  Obata, Shuichi

    IPC分类号： H04R1/28 ,  B60R11/02

    CPC分类号： H04R1/2857 ,  H04R1/2842 ,  H04R1/2865

    摘要： A sound reproducing apparatus for use in a vehicle having a speaker system constituted by at least one acoustic duct and a speaker unit disposed at a throat of the acoustic duct, an opening formed at the other end of the acoustic duct facing the passenger compartment of a vehicle. The apparatus is arranged such that, F0 and Fs are substantially equal to each other. Where Fs is the lowest frequency in a frequency range within which the imaginary part of the acoustic impedance at the sound radiating surface of the speaker system in the direction of the space within the passenger compartment is zero and F0 is the low-range resonance frequency of the speaker system itself in the free space.

    摘要翻译： 一种用于具有扬声器系统的车辆的声音再现装置，所述扬声器系统由设置在所述声学管道的喉部处的至少一个声学导管和扬声器单元构成，所述扬声器系统在所述声学导管的另一端形成， 车辆。 该装置被布置成使得F0和Fs彼此基本相等。 其中Fs是在扬声器系统的声辐射表面上的声阻抗的虚部在乘客室内的空间方向上为零的频率范围内的最低频率，F0是低频共振频率 扬声器系统本身在自由空间。