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1045 条记录 (耗时 0.023 秒)

    Subband domain echo masking for improved duplexity of spectral domain echo suppressors
    5.
    发明授权
    Subband domain echo masking for improved duplexity of spectral domain echo suppressors 有权

    公开(公告)号：EP2741481B1

    公开(公告)日：2018-10-31

    申请号：EP13152594.1

    申请日：2013-01-24

    申请人： Dialog Semiconductor B.V.

    发明人： Helsloot, Michiel ,  Radolan, Gavin

    IPC分类号： H04M9/08

    CPC分类号： H04B15/00 ,  H04M9/082

    摘要： The present document relates to echo cancellation and/or echo suppression. In particular, the present document relates to a method and system for improving the perceived duplexity of handsfree telephone applications. An echo suppression circuit (202) for an electronic device (100) comprising a loudspeaker (107) and a microphone (105) is described. The attenuation circuit (202) is configured to attenuate a subband of a transmit signal (223), wherein the transmit signal (223) is captured by the microphone (105) and wherein the transmit signal (313) comprises an echo of a far-end signal (220) rendered by the loudspeaker (107) and a near-end signal (222). The attenuation circuit (202) is further configured to determine a subband far-end indicator of a voice activity in the far-end signal (220) based on the far-end signal (220) in the subband; determine a subband near-end indicator of a voice activity of the near-end signal (222) based on the far-end signal (220) and based on the transmit signal (223) in the subband; determine a subband masking weight, based on the subband far-end indicator and based on the subband near-end indicator; wherein the subband masking weight is indicative of a masking of the echo of the far-end signal (220) by the near-end signal (222) in the subband; determine a subband attenuation for the transmit signal (223) in the subband based on an estimate of a level of the echo of the far-end signal (220) in the subband and based on the subband masking weight; and attenuate the subband of the transmit signal (223) using the determined subband attenuation.

    SOUND EMISSION AND COLLECTION DEVICE, AND SOUND EMISSION AND COLLECTION METHOD
    8.
    发明授权
    SOUND EMISSION AND COLLECTION DEVICE, AND SOUND EMISSION AND COLLECTION METHOD 有权

    公开(公告)号：EP3133835B1

    公开(公告)日：2018-09-12

    申请号：EP15779431.4

    申请日：2015-04-14

    申请人： Yamaha Corporation

    发明人： UKAI Satoshi ,  YAMAKAWA Takashi

    IPC分类号： H04R3/02 ,  H04B3/23 ,  H04M1/60 ,  H04M3/56

    CPC分类号： H04M1/6033 ,  H04M1/6016 ,  H04M1/62 ,  H04M9/082 ,  H04M2203/509

    摘要： A sound emission and collection device is provided with: a speaker (16); a filter (24) which processes a sound emission signal that is a sound signal supplied to the speaker (16); a plurality of microphones (11); a plurality of echo cancelers (32) which are provided to correspond to the plurality of microphones (11), respectively, and each cancel a recursion sound signal of sound emitted by the speaker (16) from a sound collection signal of the microphone corresponding thereto; a first integration unit which integrates adaptive filter coefficients taken out from the plurality of echo cancelers (32); a reverberation time estimation unit (41) which, on the basis of the integrated adaptive filter coefficients, estimates the reverberation time in each frequency band of a space in which the speaker (16) and the plurality of microphone (11) are present; and a calculation unit which, on the basis of the estimated reverberation time, specifies a frequency band in which the reverberation time is long from the sound emission signal, and calculates and sets, in the filter, a filter coefficient by which power in the specified frequency band is suppressed.

    ELECTRONIC DEVICE AND CONTROL PROGRAM OF ELECTRONIC DEVICE
    10.
    发明公开
    ELECTRONIC DEVICE AND CONTROL PROGRAM OF ELECTRONIC DEVICE 审中-公开

    公开(公告)号：EP3349356A1

    公开(公告)日：2018-07-18

    申请号：EP17208825.4

    申请日：2017-12-20

    申请人： Onkyo Corporation

    发明人： KONDO, Yusuke

    IPC分类号： H03G3/00 ,  H03G3/30 ,  H04M1/60 ,  H04M9/08

    CPC分类号： H03G3/3005 ,  H04M1/6016 ,  H04M9/082 ,  H04R1/1041

    摘要： Problem: To be able to observe regulation in audio output by telephone function.
    Solution: A mobile phone 1 includes a DAC 7 that has volume adjustment function and converts digital audio data into analog audio data and an SoC 2. The SoC 2 performs volume control for sound pressure regulation by the DAC 7 except during call. Further, the SoC 2 releases volume control for sound pressure regulation by the DAC 7 and performs control for regulation in audio output by telephone function during call.