会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 43. 发明授权
    • Subband acoustic echo canceller
    • 子带声回波消除器
    • US5774561A
    • 1998-06-30
    • US695446
    • 1996-08-12
    • Akira NakagawaYoichi HanedaShoji MakinoSuehiro ShimauchiJunji Kojima
    • Akira NakagawaYoichi HanedaShoji MakinoSuehiro ShimauchiJunji Kojima
    • H04M9/08H04B3/20
    • H04M9/082
    • In a subband acoustic echo canceller which generates an echo replica from a subband received signal x.sub.k (m) by an estimated echo path in each subband, subtracts the echo replica from a subband echo signal y.sub.k (m) by a subtractor to generate a subband error signal e.sub.k (m) and uses an adaptive algorithm in an echo path estimation part to estimate the transfer function of the estimated echo path from the subband error signal e.sub.k (m) and the subband received signal x.sub.k (m) so that the subband error signal e.sub.k (m) approaches zero, the stop-band attenuation of each band-pass filter of a received signal subband analysis part for generating the subband received signal x.sub.k (m) is set to be smaller than the stop-band attenuation of each band-pass filter of an echo subband analysis part for generating the subband echo signal Y.sub.k (m) to thereby flatten the frequency characteristics of the subband received signals relative to the subband echo signals.
    • 在通过每个子带中的估计回波路径从子带接收信号xk(m)生成回波复制品的子带声回波消除器中,通过减法器从子带回波信号yk(m)中减去回波复制品,以产生子带误差 信号ek(m),并且在回波路径估计部分中使用自适应算法来估计来自子带误差信号ek(m)和子带接收信号xk(m)的估计回波路径的传递函数,使得子带误差信号 ek(m)接近零时,用于产生子带接收信号xk(m)的接收信号子带分析部分的每个带通滤波器的阻带衰减被设置为小于每个频带衰减的阻带衰减, 用于产生子带回波信号Y k(m)的回波子带分析部件的通过滤波器,从而相对于子带回波信号使子带接收信号的频率特性变平。
    • 49. 发明授权
    • Tape reel
    • 磁带卷轴
    • US4403749A
    • 1983-09-13
    • US241240
    • 1981-03-06
    • Akira Nakagawa
    • Akira Nakagawa
    • G11B23/037B65H75/18B65H75/20
    • G11B23/037
    • A tape reel, comprising a hub and a pair of flanges attached one each to the opposite ends of the hub and obtainable by integrally molding one of the pair of flanges at the end of the hub and separately molding the other flange and subsequently fastening the separately molded flange by ultrasonic welding to the free end of the hub, is provided either on the hub or on the separately molded flange with means for absorbing impacts of the ultrasonic vibrations and, thereby, is prevented from sustaining fractures and distortions during the work of ultrasonic welding.
    • 一种磁带卷盘,包括一个轮毂和一对凸缘,每个凸缘分别连接到轮毂的相对两端,并可通过在毂的端部整体模制一对凸缘中的一个并分别模制另一个凸缘并随后紧固单独 通过超声波焊接到轮毂的自由端的模制法兰被提供在轮毂或单独模制的凸缘上,具有用于吸收超声波振动的冲击的装置,从而防止在超声波作业期间保持断裂和变形 焊接。