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    • 1. 发明申请
    • SOUND SIGNAL PROCESSOR AND DELAY TIME SETTING METHOD
    • 声信号处理器和延迟时间设置方法
    • US20100183163A1
    • 2010-07-22
    • US12663332
    • 2008-06-05
    • Takeshi MatsuiYasuhiko KatoNobuyuki KiharaHideki KishiYasuhiro KodamaYohei Sakuraba
    • Takeshi MatsuiYasuhiko KatoNobuyuki KiharaHideki KishiYasuhiro KodamaYohei Sakuraba
    • H04B3/20
    • H04R3/02H04M9/082
    • An echo canceller formed of an adaptive filter is designed such that even under a condition where a system transmission delay is undefined, an appropriate delay time can be set in a delay circuit that absorbs a system delay, and that an effective echo cancellation effect can always be achieved. A time difference of a transmission path until a reproduction audio signal input to the delay circuit is input as a processing target signal of an adaptive filter system through a space between a speaker and a microphone is determined, and the delay time corresponding to this time difference is set in the delay circuit. At this time, the speaker and the microphone are placed so that the distance therebetween is small, and the delay time of the delay circuit is set to 0. Thus, the determined time difference indicates a system transmission delay in the above transmission path. That is, an accurate delay time corresponding to the system transmission delay can be set in the delay circuit.
    • 由自适应滤波器构成的回波消除器被设计成即使在系统传输延迟未定义的条件下,也可以在吸收系统延迟的延迟电路中设置适当的延迟时间,并且有效的回波消除效果可以始终 实现。 确定通过扬声器和麦克风之间的空间输入到延迟电路输入的再现音频信号之间的传输路径的时间差作为自适应滤波器系统的处理目标信号,并且确定对应于该时间差的延迟时间 被设置在延迟电路中。 此时,扬声器和麦克风被放置成使得它们之间的距离小,并且延迟电路的延迟时间被设置为0.因此,所确定的时间差表示上述传输路径中的系统传输延迟。 也就是说,可以在延迟电路中设置与系统传输延迟相对应的准确的延迟时间。
    • 8. 发明授权
    • Disc drive with rotational driving and optical pickup
    • 带旋转驱动和光学拾音器的光盘驱动器
    • US07843781B2
    • 2010-11-30
    • US12002583
    • 2007-12-18
    • Yuichiro IkemotoTatsumi ItoTakeshi MatsuiKoji Ashizaki
    • Yuichiro IkemotoTatsumi ItoTakeshi MatsuiKoji Ashizaki
    • G11B7/00
    • G11B7/0045G11B7/005G11B19/28G11B2007/0006
    • Disclosed is a disc drive apparatus. The disc drive apparatus includes a rotational driving unit rotating a disc-shaped recording medium having a plurality of addresses recorded on an information recording surface of the disc-shaped recording medium; an optical pickup recording and/or reproducing an information signal on the information recording surface of the disc-shaped recording medium rotated by the rotational driving unit; and a control unit controlling rotation of the disc-shaped recording medium via the rotational driving unit. In the disc drive apparatus, the control unit carries out a disc constant velocity rotating processing that sets a predetermined address out of the plurality of addresses as a constant velocity rotation address and continuously reproduces the constant velocity rotation address using the optical pickup.
    • 公开了一种盘驱动装置。 盘驱动装置包括旋转驱动单元,其旋转具有记录在盘形记录介质的信息记录表面上的多个地址的盘形记录介质; 在由旋转驱动单元旋转的盘状记录介质的信息记录表面上记录和/或再现信息信号的光学拾取器; 以及控制单元,其经由旋转驱动单元控制盘状记录介质的旋转。 在盘驱动装置中,控制单元执行盘定速旋转处理,其将多个地址中的预定地址设置为恒速旋转地址,并使用光学拾取器连续地再现等速旋转地址。