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    ADAPTIVE FILTER UNIT FOR BEING USED AS AN ECHO CANCELLER
    1.
    发明申请
    ADAPTIVE FILTER UNIT FOR BEING USED AS AN ECHO CANCELLER 审中-公开

    公开(公告)号：US20190222699A1

    公开(公告)日：2019-07-18

    申请号：US16362156

    申请日：2019-03-22

    申请人： Sennheiser Communications A/S

    发明人： Stig PETRI ,  Svend FELDT

    IPC分类号： H04M9/08 ,  G10L21/0232 ,  H04R3/02 ,  G10L21/0208 ,  G06F17/14 ,  H04B3/23 ,  H03H21/00

    CPC分类号： H04M9/082 ,  G06F17/142 ,  G10L21/0208 ,  G10L21/0232 ,  G10L2021/02082 ,  H03H21/0027 ,  H04B3/23 ,  H04R1/1091 ,  H04R3/02 ,  H04R25/453

    摘要： The invention relates to an adaptive filter unit, in particular for being used as an echo canceller, comprising a first filter input, configured to receive a first electric audio signal, indicative of a first audio signal A(t), a second filter input, configured to receive a second electric audio signal, indicative of a second audio signal B(t), a processor and a filter output. The processor is configured to calculate and provide audio estimation data X(fn, A(t1, . . . , tM(fn))) in the frequency domain; to calculate a transformed second audio signal Y(fn, B(t)), formed by a transformation of the second audio signal B(t) into the frequency domain; and to calculate a filtered audio signal by subtracting delayed audio estimation data from the transformed second audio signal, wherein the delayed audio estimation data is provided by a memory unit of the adaptive filter unit, which is arranged to provide a data exchange with the processor, and wherein the delayed audio estimation data comprises a frequency dependent time delay compared to the transformed second audio signal.

    COMMUNICATION SYSTEM INCLUDING EAVESDROPPING
    3.
    发明申请
    COMMUNICATION SYSTEM INCLUDING EAVESDROPPING 审中-公开

    公开(公告)号：US20180255119A1

    公开(公告)日：2018-09-06

    申请号：US15908332

    申请日：2018-02-28

    申请人： Sennheiser Communications A/S

    发明人： Torben CHRISTIANSEN ,  Svend FELDT ,  Bjarne KLEMMENSEN

    IPC分类号： H04L29/06 ,  H04N21/439

    CPC分类号： H04L65/608 ,  H04L12/66 ,  H04L47/2416 ,  H04L63/0428 ,  H04L63/0442 ,  H04L63/064 ,  H04L65/403 ,  H04N21/439 ,  H04W12/003 ,  H04W84/20 ,  H04W88/16

    摘要： The disclosure presents a method and a communication system comprising; an audio gateway including; a first wireless interface configured to transmit and receive an audio signal via a first communication link, a processing unit configured to transfer the audio signal into an audio streaming signal, a second wireless interface configured to transmit the audio streaming signal via a second communication link, a plurality of communication units comprising a master communication unit and at least a first slave communication unit, wherein each of the communication unit comprises: a first wireless interface configured to receive the audio streaming signal via the second communication link and to communicate with a communication unit, a speaker configured to sound the audio streaming signal received from the audio gateway, a memory unit, and wherein the master communication unit is configured to transmit a pairing request via the second communication link to the audio gateway, and the audio gateway transmits then an encryption key to the master communication unit, and the first slave communication unit is configured to request the encryption key by transmitting an encryption request including an identification of the first slave communication unit to the master communication unit via a first internal communication link, and the master communication unit transmits then the encryption key relating to the second communication link to the first slave communication unit based on an access criteria, and the first slave communication unit is then configured to eavesdrop the audio streaming signal being communicated via the second communication link between the audio gateway and the master communication unit.

    MICROPHONE BOOM
    6.
    发明申请
    MICROPHONE BOOM 审中-公开
    麦克风加热

    公开(公告)号：US20150304749A1

    公开(公告)日：2015-10-22

    申请号：US14788308

    申请日：2015-06-30

    申请人： SENNHEISER COMMUNICATIONS A/S

    发明人： Esge Brandt ANDERSEN ,  Claus BENJAMINSEN ,  Svend FELDT ,  Christian WANG ,  Torben CHRISTIANSEN ,  Brian BRORSBØL

    IPC分类号： H04R1/02 ,  H04R1/08

    CPC分类号： H04R1/02 ,  H04R1/08 ,  H04R1/083 ,  H04R1/1041 ,  H04R1/406

    摘要： A microphone boom is provided with an extendable microphone assembly, and a headset having such a microphone boom. The headset includes a casing accommodating the signal transmission circuitry and further includes a speaker adapted to serve a sound signal at the proximity of a user's ear and the speaker is protruding from the casing at a speaker-end of the casing and a microphone assembly is fixated relative to the casing distally with respect to the speaker-end.

    摘要翻译： 麦克风吊杆设置有可延伸的麦克风组件和具有这种麦克风吊杆的耳机。 耳机包括容纳信号传输电路的壳体，并且还包括适于在用户耳朵附近服务声音信号的扬声器，并且扬声器在壳体的扬声器端处从壳体突出并且固定麦克风组件 相对于外壳相对于扬声器端向远侧。