公开(公告)号：WO1997019515A1

公开(公告)日：1997-05-29

申请号：PCT/SE1996001440

申请日：1996-11-08

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (publ)

Inventor： TELEFONAKTIEBOLAGET LM ERICSSON (publ) ,  ENGMAN, Anders ,  ROSTAMY, Jafar ,  VON PERNER, Johan

IPC: H03G03/34

CPC classification number: H03G3/344

Abstract: Detection of in-band noise in a radio communications voice channel is provided by mixing a signal having a known frequency into a radio signal containing a voice channel signal in an in-band range, thereby translating the voice channel signal out of the in-band range. The in-band range is thereafter examined for the presence of noise signal energy whose presence can be indicative of in-band noise. Squelching of the voice channel is provided in the event that in-band noise energy exceeds a predetermined threshold.

Abstract translation: 无线电通信语音信道中的带内噪声的检测通过将具有已知频率的信号混合到包含带内范围的语音信道信号的无线电信号中来提供，从而将语音信道信号转换成带内 范围。 此后检查带内范围是否存在能够指示带内噪声的噪声信号能量。 在带内噪声能量超过预定阈值的情况下，提供语音信道的静噪。

公开(公告)号：WO1993020622A1

公开(公告)日：1993-10-14

申请号：PCT/US1993002982

申请日：1993-03-30

Applicant: MOTOROLA, INC.

Inventor： MOTOROLA, INC. ,  GHOMESHI, Mansour ,  WONG, Chin, Pan ,  SIMMONS, John, W.

IPC: H04B01/10

CPC classification number: H04B1/1027 ,  H03G3/344

Abstract: A communication device (100) having a receiver (106) and an audio output device (116) is provided. The communication device (100) includes a digital signal processor DSP (110) for measuring the level of signal energy in a first segment of the frequency spectrum of the received signal to dynamically establish a squelch threshold. The DSP (110) is also used to measure the level of signal energy in a second segment of the frequency spectrum of the received signal. The communication device (100) also includes audio gates (114). The audio gates (114) provide for the unmuting of the audio output device (116) when the signal energy contained in the second segment of the frequency spectrum of the received signal is below the squelch threshold.

公开(公告)号：WO1993003551A1

公开(公告)日：1993-02-18

申请号：PCT/US1992006421

申请日：1992-08-03

Applicant: MOTOROLA, INC.

Inventor： MOTOROLA, INC. ,  SIMMONS, John, W. ,  KEHLER, Walter, H., Jr.

IPC: H04B01/10

CPC classification number: H03G3/344 ,  H04B1/1027

Abstract: A squelch circuit (118) is provided having a squelch hysteresis window for preventing squelch chatter in a communication device (100). The communication device (100) includes a plurality of squelch states. The squelch circuit (118) comprises a first means (206) for sensing when the communication device (100) is in a first squelch state. The squelch circuit (118) also includes a second means (116) which is responsive to the first means (206) for varying the squelch hysteresis window to prevent squelch chatter.

Abstract translation: 提供了一种静噪电路（118），具有用于防止通信装置（100）中的静噪颤动的静噪窗口。 通信装置（100）包括多个静噪状态。 静噪电路（118）包括用于感测何时通信装置（100）处于第一静噪状态的第一装置（206）。 静噪电路（118）还包括第二装置（116），其响应于第一装置（206）来改变静噪窗口以防止静噪颤动。

公开(公告)号：WO2017142916A1

公开(公告)日：2017-08-24

申请号：PCT/US2017/017922

申请日：2017-02-15

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： GUNAWAN, David ,  LI, Chunjian

IPC: G10L19/008 ,  G10L21/034 ,  H03G3/30 ,  H03G7/00 ,  H04S7/00

CPC classification number: G10L19/008 ,  G10L21/034 ,  H03G3/3089 ,  H03G3/344 ,  H03G5/005 ,  H03G5/165 ,  H04R5/04 ,  H04R2430/01 ,  H04R2430/03 ,  H04S7/30 ,  H04S2400/13 ,  H04S2400/15 ,  H04S2420/07

Abstract: A sound processing system operative to measure the level of diffusivity of the sounds present in the input sound signal. The system includes a plurality of input channels for receiving audio signals from an audio scene, the audio scene comprising at least one target sound in the presence of background noise. A diffusivity measurement unit is included so as to be operably coupled to the plurality of input channels to receive the audio signals therefrom and measure a level of diffusivity of the sounds present therein. A leveler unit is operably coupled to the plurality of input channels for receiving the audio signals therefrom and for applying a gain to the audio signals to minimize variations in the audio signal levels. A controller is operably coupled to the diffusivity measurement unit and the leveler unit to control the gain applied to the audio signals by the leveler unit based on the level of diffusivity of the sounds present therein.

Abstract translation: 声音处理系统用于测量输入声音信号中存在的声音的扩散率水平。 该系统包括多个输入通道，用于接收来自音频场景的音频信号，该音频场景包括存在背景噪声的至少一个目标声音。 包括扩散率测量单元以便可操作地耦合到多个输入通道以从其接收音频信号并测量其中存在的声音的扩散率水平。 整平器单元可操作地耦合到多个输入通道，用于从其接收音频信号并将增益施加到音频信号以最小化音频信号电平的变化。 控制器可操作地耦合到扩散率测量单元和整平器单元，以基于其中存在的声音的扩散率水平来控制整平器单元施加到音频信号的增益。

公开(公告)号：WO2005091512A1

公开(公告)日：2005-09-29

申请号：PCT/JP2005/002894

申请日：2005-02-23

Applicant: 三洋電機株式会社 ,  齋藤 康二 ,  平社 豊 ,  平 正明

Inventor： 齋藤 康二 ,  平社 豊 ,  平 正明

IPC: H04B1/10

CPC classification number: H03G3/3052 ,  H03F1/26 ,  H03F1/32 ,  H03F3/68 ,  H03F2200/03 ,  H03G3/344 ,  H04B1/1661

Abstract: 【課題】マルチパスノイズによるノイズ感および歪み感を小さくすることができる信号処理回路を提供する。 【解決手段】受信信号を検波して得られる復調信号を減衰する減衰部と、前記復調信号の強度を示す第１信号を検出する検出部と、前記第１信号に基づいて前記減衰部の減衰率を設定する減衰率設定部と、を備えた信号処理回路において、前記減衰率設定部は、前記受信信号の中間周波信号に基づいて得られる包絡線の変化を示す第２信号、前記中間周波信号に基づいて得られる電界強度を示す第３信号の少なくとも一つの信号と、前記第１信号に応じて前記減衰部の減衰率を設定する。

Abstract translation: [问题]提供能够降低归因于多路径噪声的噪声和失真的信号处理电路。 解决问题的手段信号处理电路包括：衰减单元，用于衰减通过检测接收信号而获得的解调信号; 检测单元，用于检测指示解调信号的强度的第一信号; 以及衰减比设定单元，用于根据第一信号设定衰减单元的衰减比。 衰减比设定单元根据指示根据接收信号的中频信号获得的包络的变化的第二信号和表示根据接收信号的中频信号获得的场强的第三信号中的至少一个来设置衰减单元的衰减比 到中频信号，并根据第一信号。

公开(公告)号：WO1997038543A1

公开(公告)日：1997-10-16

申请号：PCT/FI1997000217

申请日：1997-04-09

Applicant: NOKIA TELECOMMUNICATIONS OY ,  VIMPARI, Markku ,  REPONEN, Kari ,  SIPPOLA, Jaakko

Inventor： NOKIA TELECOMMUNICATIONS OY

IPC: H04Q07/34

CPC classification number: H03G3/344

Abstract: The invention relates to a squelch control arrangement in an analogue mobile network. The invention is characterized by comprising a first information activity detector (23) for monitoring the information activity of an uplink transmission from a mobile station (MS); a second information activity detector (24) for monitoring the information activity of a downlink transmission; and a squelch control unit (25), responsive to said first and second information activity detectors (23, 24), for controlling a squelch switch (21). The invention also relates to a method of controlling the squelch in an analogue mobile system.

Abstract translation: 本发明涉及模拟移动网络中的静噪控制装置。 本发明的特征在于包括：用于监视来自移动台（MS）的上行链路传输的信息活动的第一信息活动检测器（23）。 第二信息活动检测器（24），用于监视下行链路传输的信息活动; 以及响应于所述第一和第二信息活动检测器（23,24）的静噪控制单元（25），用于控制静噪开关（21）。 本发明还涉及一种在模拟移动系统中控制静噪的方法。

公开(公告)号：WO1997027669A1

公开(公告)日：1997-07-31

申请号：PCT/FR1997000134

申请日：1997-01-23

Applicant: GROUPE PRESIDENT ELECTRONICS ,  BERTRANA, Albert

Inventor： GROUPE PRESIDENT ELECTRONICS

IPC: H03G03/34

CPC classification number: H03G3/344

Abstract: A radio receiver for receiving audio frequency communications conveyed by a high-frequency carrier and occurring randomly over time. In addition to the tuning circuits (1), a detector (2), audio frequency amplifier means (4) and a sound transducer (5), said receiver includes controlled switching means (3) connected between the detector (2) and the amplifier means (4) for disabling or reenabling the transfer of the audio signal from the detector (2) to the sound transducer (5). Filtering and detection means (12, 13) set a silence threshold to provide squelch. The means are arranged to set the silence threshold in accordance with the level of a part of the audio spectrum from the detector (2) of which the frequency band only contains noise and is located outside the frequency band of the signal representing the useful audio communication to be received. Said receiver is particularly suitable for use in citizen's band equipment.

Abstract translation: 一种用于接收由高频载波传送并随时间随机发生的音频通信的无线电接收机。 除了调谐电路（1），检测器（2），音频放大器装置（4）和声音传感器（5）之外，所述接收机还包括被连接在检测器（2）和放大器 用于禁止或重新启动音频信号从检测器（2）传输到声音传感器（5）的装置（4）。 滤波和检测装置（12,13）设置静音阈值以提供静噪。 该装置被设置成根据来自其频带仅包含噪声的检测器（2）的一部分音频频谱的水平设置静音阈值，并且位于表示有用音频通信的信号的频带之外 被接收。 所述接收器特别适用于公民乐队设备。

公开(公告)号：WO2014166525A1

公开(公告)日：2014-10-16

申请号：PCT/EP2013/057377

申请日：2013-04-09

Applicant: PHONAK AG

Inventor： MARQUIS, Francois ,  MULDER, Hans ,  HARSCH, Samuel ,  JOST, Tim

IPC: H04R25/00 ,  H03G3/34

CPC classification number: H04R25/554 ,  H03G3/344 ,  H04R25/50 ,  H04R2225/43

Abstract: There is provided a method for providing hearing assistance to a user, comprising: capturing audio signals by a microphone arrangement (17) of a transmission unit (10, 1 10); analyzing, by a voice activity detector (24) of the transmission unit, the captured audio signals in order to judge whether a voice is present close to the microphone arrangement or not, analyzing, by a noise level estimator (25), the captured audio signals in order to estimate a surrounding noise level, processing the captured audio signals and transmitting, by a transceiver (28) of the transmission unit, the processed audio signals via a wireless link (12) to a receiver unit (14, 1 14, 214), and stimulating the user's hearing, by stimulating means (16, 64, 82, 182) worn at or in at least one of the user's ears, according to the received audio signals, wherein the audio signals are processed prior to and/or after transmission via the wireless link by setting the gain applied to the audio signals according to the close voice / no close judgement of the voice activity detector and the estimated surrounding noise level, wherein said gain is set to a first gain value (g 1 ) during times when the presence of close voice is judged, wherein said gain is reduced from the first gain value by an attenuation value (a) to a second gain value (g 2 ) when a change from close voice to no close voice is judged, and wherein the attenuation value is selected as a function of the estimated surrounding noise level in such a manner that the attenuation value increases with increasing estimated surrounding noise level.

Abstract translation: 提供了一种用于向用户提供听力辅助的方法，包括：通过传输单元（10,110）的麦克风装置（17）捕获音频信号; 通过传输单元的语音活动检测器（24）分析所捕获的音频信号，以便判断语音是否靠近麦克风布置存在，由噪声级估计器（25）分析​​所捕获的音频 信号，以估计周围噪声电平，处理所捕获的音频信号，并由传输单元的收发器（28）将处理的音频信号经由无线链路（12）发送到接收机单元（14,144） 214），并且通过根据接收的音频信号刺激佩戴在用户耳朵中或其中的至少一个耳朵上的装置（16,64,82,182）来刺激用户的听力，其中音频信号在之前和/ 或者在通过根据语音活动检测器的紧密语音/不接近判断和估计的周围噪声电平设置应用于音频信号的增益之后经由无线链路传输，其中所述增益被设置为第一增益值（g1） 期间 判断是否存在接近的声音，其中当从闭合声音到无关闭声音的改变被判断时，所述增益从第一增益值减小衰减值（a）到第二增益值（g2），并且其中 衰减值被选择为估计的周围噪声电平的函数，使得衰减值随着估计的周围噪声电平的增加而增加。

公开(公告)号：WO2010011362A1

公开(公告)日：2010-01-28

申请号：PCT/US2009/032846

申请日：2009-02-02

Applicant: QUALCOMM INCORPORATED ,  MAJUMDAR, Somdeb ,  GARUDADRI, Harinath

Inventor： MAJUMDAR, Somdeb ,  GARUDADRI, Harinath

IPC: H03G3/34

CPC classification number: H03G3/344

Abstract: An apparatus and method for processing signals are disclosed. The apparatus may include a receiver configured to receive an audio signal having a plurality of audio artifacts, and an audio circuit configured to reduce the audio artifacts during at least a portion of a time period as a function of an energy level of the audio signal during that time period.

Abstract translation: 公开了一种用于处理信号的装置和方法。 该装置可以包括被配置为接收具有多个音频伪像的音频信号的接收机，以及音频电路，被配置为在时间段的至少一部分期间减小作为音频信号的能级的函数的音频伪像 那段时间。

公开(公告)号：WO2006054702A1

公开(公告)日：2006-05-26

申请号：PCT/JP2005/021260

申请日：2005-11-18

Applicant: パイオニア株式会社 ,  小野 康 ,  菅野 英之

Inventor： 小野 康 ,  菅野 英之

IPC: H04B1/16 ,  G10L11/02

CPC classification number: H03G3/344

Abstract: 　ＡＲＣ部（３０８）のハイカット制御部（４０２）では、電界レベルノイズ信号、ノイズレベル信号およびソース種別判別信号に基づいてハイカット制御量調整回路（４０９）がハイカット制御の制御量を調整し、また、セパレーション制御部（４０３）では、電界レベル信号、ノイズレベル信号および再生モード判別信号に基づいてセパレーション制御量調整回路（４１２）がセパレーション回路（４１０）におけるセパレーション制御の制御量を調整する。

Abstract translation: 在ARC单元（308）的高切割控制单元（402）中，高切割控制量调整电路（409）根据场电平信号，噪声电平信号调整高切割控制的控制量， 和源类型判断信号。 此外，在分离控制单元（403）中，分离控制量调整电路（412）根据场电平信号，噪声电平信号和再现模式来调整分离电路（410）中的分离控制的控制量 调整信号。