公开(公告)号：US10542152B2

公开(公告)日：2020-01-21

申请号：US16426546

申请日：2019-05-30

申请人： TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED

发明人： Jun Bin Liang

IPC分类号： H04M9/08 ,  H04M9/10 ,  G10L21/0232 ,  G10L21/0208 ,  H04B17/336

摘要： An echo time delay detection method, an echo elimination device, and terminal equipment are provided. The echo time delay detection method includes: obtaining an audio signal transmitted through air and acquired by an audio input device of terminal equipment when detecting a call access request, the audio signal corresponding to an audio output by an audio output device of the terminal equipment; converting the audio signal to obtain a signal to be processed; determining a reference signal corresponding to the audio signal; and determining an echo time delay value according to the reference signal and the signal to be processed.

公开(公告)号：US10356249B2

公开(公告)日：2019-07-16

申请号：US15761694

申请日：2017-03-20

申请人： TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED

发明人： Jun Bin Liang

IPC分类号： H04M9/08 ,  H04M9/10 ,  H04B17/336 ,  G10L21/0208 ,  G10L21/0232

摘要： An echo time delay detection method, an echo elimination device, and terminal equipment are provided. The echo time delay detection method includes: obtaining an audio signal transmitted through air and acquired by an audio input device of terminal equipment when detecting a call access request, the audio signal corresponding to an audio output by an audio output device of the terminal equipment; converting the audio signal to obtain a signal to be processed; determining a reference signal corresponding to the audio signal; and determining an echo time delay value according to the reference signal and the signal to be processed.

公开(公告)号：US20150327035A1

公开(公告)日：2015-11-12

申请号：US14275631

申请日：2014-05-12

申请人： Intel Corporation

发明人： Swarnendu Kar ,  Saurabh Dadu

IPC分类号： H04W4/16 ,  G10L21/0208 ,  G10L21/02 ,  H04M9/08 ,  H04M9/10

CPC分类号： G10L21/0216 ,  G10L21/0205 ,  G10L21/0208 ,  H04M9/082 ,  H04M9/085 ,  H04W4/16 ,  H04W4/70 ,  H04W88/06

摘要： This application discusses among other things apparatus and methods for optimizing speech recognition at a far-end device. In an example, a method can include establishing a link with a far-end communication device using a near-end communication device, identifying a context of the far end communication device, and selecting one audio processing mode of a plurality of audio processing modes at the near-end communication device, the one audio processing mode associated with the identified context of the far-end device, and configured to reduce reception error by the far-end communication device of audio transmitted from the near-end communication device.

摘要翻译： 该应用程序还讨论了用于优化远端设备的语音识别的设备和方法。 在一个示例中，一种方法可以包括使用近端通信设备建立与远端通信设备的链接，识别远端通信设备的上下文，以及选择多种音频处理模式中的一种音频处理模式 近端通信设备，与远端设备的所识别的上下文相关联的一个音频处理模式，并且被配置为减少远端通信设备对从近端通信设备发送的音频的接收错误。

公开(公告)号：US06091937A

公开(公告)日：2000-07-18

申请号：US858009

申请日：1997-05-16

申请人： Stefan Uhlemann

发明人： Stefan Uhlemann

IPC分类号： H04M9/08 ,  H04M9/10 ,  H04B17/00

CPC分类号： H04M9/08 ,  H04M9/10

摘要： A method is disclosed for the automatic adjustment of a switch means for automatically switching between a reception operating mode and a transmission operating mode in a hands-free means of a communication terminal equipment comprising a reception signal branch in which received signals are processed and output via a loudspeaker, a transmission signal branch in which signals received via a microphone are processed and output, and comprising the switch means to be adjusted with which attenuation stages provided in the reception signal branch and in the transmission signal branch can be selectively driven dependent on signals transmitted over the reception signal branch and the transmission signal branch and whose sensitivity for the signals transmitted over the transmission signal branch and the reception signal branch is adjustable using an audio signal generator. The disclosed method is characterized in that the switch means is adjusted upon measurement of the extent of the coupling of a test tone signal generated by the audio signal generator from the reception signal branch onto the transmission signal branch and/or from the transmission signal branch onto the reception signal branch.

摘要翻译： 公开了一种用于自动调整用于在通信终端设备的免提装置中的接收操作模式和传输操作模式之间自动切换的开关装置的方法，该通信终端设备包括接收信号分支，其中接收信号经处理并经由 扬声器，其中经由麦克风接收的信号被处理和输出的传输信号分支，并且包括要被调整的开关装置，在接收信号分支中和传输信号分支中设置的衰减级可以根据信号被选择性地驱动 通过接收信号分支和发送信号分支发送，并且通过发送信号分支和接收信号分支发送的信号的灵敏度可以使用音频信号发生器来调节。 所公开的方法的特征在于，当测量由音频信号发生器产生的测试音信号从接收信号分支到传输信号分支和/或从传输信号分支到 接收信号分支。

公开(公告)号：US5867574A

公开(公告)日：1999-02-02

申请号：US858421

申请日：1997-05-19

申请人： Erol Eryilmaz

发明人： Erol Eryilmaz

IPC分类号： H04B1/46 ,  H04M9/08 ,  H04M9/10 ,  H04M1/00

CPC分类号： H04M9/10 ,  H04B1/46 ,  H04M9/08

摘要： An improved voice activity detection system and method is provided for use in speakerphones and other voice activated systems. To facilitate switching between various operating modes, the voice activity detection scheme utilizes a new voice energy term which is based on an integral of the absolute value of a derivative of a speech signal. Voice activity is detected during a silence mode by comparing a first ratio of a current voice energy value to a background noise value with a voice activity threshold value. Voice activity is detected when the first ratio is greater than the voice activity threshold value. Another step involves identifying a direction of the voice activity during a transmit and receive mode by comparing a second ratio of a transmit path voice energy value to a receive path voice energy value with a transmit threshold value and a receive threshold value. When the second ratio is greater than the transmit threshold value, voice activity is present in the transmit path. Similarly, when the second ratio is less than the receive threshold value, then voice activity is present in the receive path. Following the detection of voice activity in one of the paths, the speakerphone or voice activated system begins transitioning to the applicable mode by gradually suppressing the signal in the other path according to the value of the second ratio.

公开(公告)号：US5410592A

公开(公告)日：1995-04-25

申请号：US73204

申请日：1993-06-04

申请人： Randall M. Wagner ,  Yogi L. Mistry

发明人： Randall M. Wagner ,  Yogi L. Mistry

IPC分类号： H03F3/217 ,  H04M9/10

CPC分类号： H03F3/2171

摘要： An audio amplifier for providing a power boost for telephone-sourced audio signals that drive one or more paging speakers employs a class D amplifier and a state variable feedback network, which monitors voltage and current levels of an audio output filter to which the paging speakers are coupled, so as to adjust the operation of the amplifier circuit, as necessary, to compensate variations in the speaker loading of the audio output filter. The class D amplifier includes a pulse width modulator, which controls the switching of a power H-bridge-configured switching circuit. The switching circuit sources and sinks current with respect to the paging speaker load. The output of the power bridge switching circuit is a high energy square wave-type signal, which is filtered in a downstream audio filter to remove the switching transients and preserve the desired voice paging signal for application to the paging speakers. The state variable feedback network monitors variations in current flow and voltage at a plurality of circuit locations of the audio filter circuit and sums the monitored variations to produce an error signal, which is fed back to the input of the voice paging amplifier circuit and combined with the audio input signal.

摘要翻译： 用于为驱动一个或多个寻呼扬声器的电话提供的音频信号提供功率提升的音频放大器采用D类放大器和状态变量反馈网络，其监视寻呼扬声器所处的音频输出滤波器的电压和电流水平 耦合，以便根据需要调节放大器电路的操作，以补偿音频输出滤波器的扬声器负载的变化。 D类放大器包括一个脉冲宽度调制器，用于控制电源H桥配置的开关电路的切换。 开关电路相对于寻呼扬声器负载的电流源和吸收电流。 电源桥开关电路的输出是高能量方波信号，其在下游音频滤波器中被滤波以去除开关瞬变并保留所需的语音寻呼信号以应用于寻呼扬声器。 状态变量反馈网络监视音频滤波器电路的多个电路位置处的电流和电压的变化，并且对所监视的变化求和以产生误差信号，该误差信号被反馈到语音寻呼放大器电路的输入并与 音频输入信号。

公开(公告)号：US5048082A

公开(公告)日：1991-09-10

申请号：US480234

申请日：1990-02-15

申请人： Wolfgang Krafft

发明人： Wolfgang Krafft

IPC分类号： H04M9/10

CPC分类号： H04M9/10

摘要： A method for controlling a voice-controlled voice direction recognition unit for a digital telephone station, which can be connected to termination units having different hybrid attenuations. The method prevents self-interruption in the transmission side due to an excessively low hybrid attenuation. This is achieved by providing a counter unit that identifies the switching occurrences of the voice direction recognition per time unit and, when a predetermined number is exceeded, that causes the voice direction recognition unit to connect an auxiliary attenuation element into every voice channel. The method can be utilized in digital telephone stations whose termination units are located in an appertaining switching system.

摘要翻译： 一种用于控制用于数字电话台的语音控制语音方向识别单元的方法，其可以连接到具有不同混合衰减的终端单元。 该方法由于混合衰减过低而防止发送侧的自我中断。 这通过提供一个计数器单元来实现，该计数器单元识别每个时间单位的语音方向识别的切换发生，并且当超过预定数量时，使得语音方向识别单元将辅助衰减元件连接到每个语音信道中。 该方法可用于终端单元位于交换系统中的数字电话站。

公开(公告)号：US4965833A

公开(公告)日：1990-10-23

申请号：US232800

申请日：1988-08-16

申请人： Thomas McGregor ,  George A. Wemyss ,  Ian M. Firth

发明人： Thomas McGregor ,  George A. Wemyss ,  Ian M. Firth

IPC分类号： H04R3/02 ,  B60R11/02 ,  H04M1/60 ,  H04M9/08 ,  H04M9/10

CPC分类号： H04M9/087 ,  H04R3/02

摘要： A voice enhancer system for a car includes a pair of microphones positioned adjacent to the front seats of the car, and a pair of loudspeakers positioned adjacent to the rear seats. The microphones are connected to the loudspeakers, via an amplifier/electrical conditioning unit, by electrical wiring positioned behind the car's upholstery. The conditioning unit, which includes filters and a frequency shifter is adjusted to prevent acoustical `howl-around` within the enclosure of the car. For voice enhancement from the rear to the front of the car, microphones may be positioned adjacent to the rear seats, and loudspeakers may be positioned adjacent to the front seats, these components being connected together, via a second amplifier/electrical conditioning unit, by electrical wiring.

公开(公告)号：US4776006A

公开(公告)日：1988-10-04

申请号：US41567

申请日：1987-04-23

申请人： Timothy N. Comerford ,  Jan R. Holliday ,  Michael J. McLane

发明人： Timothy N. Comerford ,  Jan R. Holliday ,  Michael J. McLane

IPC分类号： H04Q3/58 ,  H04M1/723 ,  H04M9/02 ,  H04M1/72 ,  H04M9/10

CPC分类号： H04M9/027 ,  H04M1/723

摘要： A multiplexed data channel telephone system comprising a master station (221) and one or more remote stations (222) is disclosed. Each station (221, 222) is bridged, in a parallel electrical connection, onto a wire-pair (201) that extends from the stations to a telephone switching system. Each station (221, 222) includes a voiceband line interface (110, 310) for connecting to the wire-pair (201) at voiceband frequencies, and a radio frequency line interface (700, 800) for connecting to the wire-pair (201) at radio frequencies. Each station further includes multiplexer and demultiplexer equipment (500, 600) for frequency shifting a data channel between baseband and rf. Amplitude modulation and half-duplex transmission are used in the data channel. Telephone status and control information, including ringing and answer control, are exchanged between controllers (160, 360) via the data channel. Remote stations (222) minimize the amount of equipment required by using the data channel to control common equipment at the master station (221) that interacts with incoming telephone lines (201, 202).

摘要翻译： 公开了一种包括主站（221）和一个或多个远程站（222）的复用数据信道电话系统。 每个站（221,222）以并联电连接桥接到从站延伸到电话交换系统的有线对（201）上。 每个站（221,222）包括用于以语音频带频率连接到线对（201）的语音频带线路接口（110,310）和用于连接到线对的射频线路接口（700,800） 201）。 每个站还包括用于在基带和rf之间频移数据信道的多路复用器和解复用器设备（500,600）。 在数据通道中使用幅度调制和半双工传输。 电话状态和控制信息，包括振铃和应答控制，经由数据信道在控制器（160,360）之间交换。 远程站（222）使通过数据通道控制主站（221）与进入的电话线（201,202）相互作用的公用设备所需的设备的数量最小化。

公开(公告)号：US4400584A

公开(公告)日：1983-08-23

申请号：US365811

申请日：1982-04-05

申请人： Richard J. Vilmur

发明人： Richard J. Vilmur

IPC分类号： H04M9/10 ,  H04M1/62 ,  H04M9/08

CPC分类号： H04M9/10

摘要： An improved speakerphone (120 and 130 in FIG. 1) for radio and landline telephones is described. The improved speakerphone (120 and 130) includes a microphone (102 and 132), a speaker (104 and 134) and unique control circuitry (106 and 136). The control circuitry of speakerphone (200 in FIG. 2) interfaces a microphone (250) to a transmit signal (220) and speaker (260) to a receive signal (222) of a duplex communication path, such as a radio channel or telephone line. An audio switch (212) opens or closes the speaker audio path in response to a control signal (224) from control logic (230), and another audio switch (202) opens or closes the microphone audio path in response to the binary complement of the control signal (224). Transmit and receive signal detectors (206 and 207), each includes a logarithmic amplifier (240), an envelope detector (241), a smoothing filter (245 ), a valley detector (242), a summer (243) and a comparator (244) for detecting the presence of audio signals in environments that may be subject to high background noise. Binary output signals from the transmit and receive signal detectors (206 and 207) are applied to control logic (230) which generates the control signal (224) for opening and closing the transmit and receive audio paths. The control logic (230 in FIG. 3) includes delay circuitry (316 and 318) and logic circuitry (304, 306, 308, 310, 312 and 314) for setting and resetting a flip-flop (302) storing the control signal (224). The control logic (230) changes the state of the control signal flip-flop (302) for switching the audio path between the micorphone and speaker when audio signals from the presently closed audio path have not been detected for a time interval determined by the delay circuitry (316 and 318) and audio signals thereafter are detected on the other audio path.