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    • 15. 发明公开
      EP0661858A3 Background noise compensation in a telephone set 失效
    • Background noise compensation in a telephone set
    • 在电话机背景噪音消除。
    • EP0661858A3
    • 1999-04-28
    • EP94309189.2
    • 1994-12-09
    • AT&T Corp.
    • Allen, Jonathan Brandon , Youtkus, Donald Joseph
    • H04M1/60 , H04M1/19
    • H04M1/60 , H04M1/19
    • An automated method for modifying a speech signal communicated over a telephone network applies a gain factor (in 25) in a telephone set before any side tone is added thereto. The gain factor is a function (24) of a received signal indicative of the background noise (22) at the location of the telephone set. The gain applied may be a function of both the background noise level (22) and the original speech signal (23). Either a linear or a non-linear (e.g., compressed) amplification of the original speech signal may be performed, where a compressed amplification results in the higher level portions of the speech signal being amplified by a smaller gain factor than lower level portions. The speech signal may be separated into a plurality of subbands, each resultant subband signal being individually modified in accordance with the present invention. In this case, each subband speech signal is amplified by a gain factor based on a corresponding subband noise signal, generated by separating the background noise signal into a corresponding plurality of subbands. The individual modified subband signals may then be combined to form the resultant modified speech signal.
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Global Dossier Espacenet 法律信息 同族专利 专利引用
    • 16. 发明公开
      EP0871312A1 Two-way voice communication device 失效
    • Two-way voice communication device
    • 双语教学
    • EP0871312A1
    • 1998-10-14
    • EP97105554.6
    • 1997-04-03
    • Pan Communications, Inc.
    • Yamaguchi, Noboru , Konomi, Masao
    • H04M1/02 , H04R1/38 , H04M1/19
    • H04M1/03 , H04M1/0214 , H04M1/19 , H04R1/38
    • A two-way voice terminal device which prevents the occurrence of howling or echo, avoids such an occurrence that communication becomes difficult due to ambient noise, and does not cause communication to be interrupted. A transmitter/receiver 1 contains a transmitter 2 and a receiver fabricated integrally together, the transmitter 2 and the receiver are so arranged that the distance is not shorter than 7 cm between the sound pick-up port of the transmitter 2 and the center C of a speaker 3 of the receiver, the transmitter 2 has a two-way microphone 2b arranged nearly at the center of the pipe 2a and is stuffed with a sound-absorbing material 2c at both ends of the pipe 2a and has a net 2d at both ends thereof. The direction of the transmitter 2 is adjustable.
    • 一种防止啸叫或回声发生的双向语音终端装置，避免了由于环境噪声而导致通信变得困难的事件，并且不会导致通信被中断。 发射机/接收机1包含发射机2和整体地一起制造的接收机，发射机2和接收机被布置成使发射机2的拾音口与中心C之间的距离不小于7cm 接收器的扬声器3，发射机2具有几乎位于管道2a的中心处的双向麦克风2b，并且在管2a的两端填充有吸音材料2c，并且在两者处具有网2d 其端部。 变送器2的方向可调。
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Global Dossier Espacenet 法律信息 同族专利 专利引用
    • 19. 发明公开
      EP0742678A2 Noise canceling gradient microphone assembly 失效
    • Noise canceling gradient microphone assembly
    • Gradientmikrophon mitRauschunterdrückungsanordnung
    • EP0742678A2
    • 1996-11-13
    • EP96303051.5
    • 1996-05-01
    • AT&T Corp.
    • Baumhauer, John Charles, Jr. , Marcus, Larry Allen
    • H04R1/38 , H04R1/40 , H04M1/03 , H04M1/19
    • H04M1/03 , H04M1/035 , H04M1/19 , H04R1/38
    • An improved Broadside SOG microphone assembly is realized by employing a microphone assembly having at least three ports arranged in a non-colinear fashion with the at least three ports defining and being in a "gradient" plane and with both outer adjacent differential pair of ports aligned in a direction substantially toward a prospective talker's lips. Thus, the inner port(s) is always closer to the prospective talker's lips. Each outer differential pair of ports forms a dipole which yields a high spatial gradient and, hence, higher speech sensitivity since they are pointed substantially toward the prospective talker's lips. Just as important, as the prospective talker's lip position relative to the microphone varies, this alignment of each outer differential pair of ports will result in the least change in the dipole sensitivity and, therefore, the lowest Broadside SOG microphone position sensitivity. Another advantage of this arrangement is that it similarly has significantly reduced position sensitivity with angular departure from the nominal Broadside prospective talker's lip position, owing again to the orientation of the prospective talker's lips. In a preferred embodiment, a single FOG microphone element is employed which accepts four distinct acoustic signals from acoustic transmission lines from four distinct ports arranged in a non-colinear fashion. The four ports define and are in a "gradient" plane with both outer adjacent differential pair of ports aligned in a direction substantially toward the prospective talker's lips. Thus, the inner ports are always closer to the prospective talker's lips. Each outer differential pair of ports forms a dipole which yields a high spatial gradient and, hence, higher speech sensitivity since they are pointed in a direction substantially toward the prospective talker's lips. To this end, the outer ports are plus (+) ports and the inner ports are minus (-) ports, or vice versa,. referring to each side of the FOG element's diaphragm.
    • 改进的Broadside SOG麦克风组件通过采用麦克风组件来实现，所述麦克风组件具有至少三个端口以非共线方式布置，所述至少三个端口限定并处于“梯度”平面中，并且两个外部相邻的差分对端口对准 在大致朝向潜在的谈话者的嘴唇的方向上。 因此，内部港口总是更接近预期的谈话者的嘴唇。 每个外部差分对的端口形成偶极子，其产生高的空间梯度，并且因此具有较高的语音敏感性，因为它们基本上指向潜在的讲话人的嘴唇。 同样重要的是，由于相对于麦克风的预期谈话者的嘴唇位置变化，每个外部差分对端口的对齐将导致偶极灵敏度的最小变化，并因此导致最低的Broadside SOG麦克风位置灵敏度。 这种安排的另一个优点是，它同样地显着地降低了位置灵敏度，与角度偏离名义上的Broadside预期谈话者的嘴唇位置，这再次取决于潜在的谈话者的嘴唇的方向。 在优选实施例中，采用单个FOG麦克风元件，其接收来自四个不同端口的声波传输线的四个不同的声音信号，这四个不同的端口以非共线方式排列。 四个端口定义并且处于“梯度”平面中，两个外部相邻的差分对端口在基本上朝向潜在谈话者的嘴唇的方向上对齐。 因此，内部端口总是更接近预期的谈话者的嘴唇。 每个外部差分对端口形成偶极子，其产生高空间梯度，并且因此具有更高的语音敏感度，因为它们被指向基本上朝向潜在讲话者的嘴唇的方向。 为此，外部端口是正（+）端口，内部端口是负（ - ）端口，反之亦然。 指的是FOG元件的隔膜的每一侧。
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Global Dossier Espacenet 法律信息 同族专利 专利引用
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