公开(公告)号：US20150280678A1

公开(公告)日：2015-10-01

申请号：US14228903

申请日：2014-03-28

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： KHENG SHIANG TEH ,  CHEAH HENG TAN

IPC: H03G9/14 ,  H03G3/30 ,  H04B1/3827

CPC classification number: H03G9/14 ,  H03G3/3026 ,  H03G3/3089 ,  H03G9/025 ,  H04B1/3827 ,  H04R5/04

Abstract: A method and apparatus for detecting the connection of an external audio accessory to an audio device via a two-wire audio jack includes providing a DC bias on the output of the audio circuit connected to the audio jack. The audio jack is such that, when a plug is inserted into the audio jack, the DC bias is removed from an internal routing pin of the audio jack. The change in DC voltage at the internal routing pin indicates connection of the external audio accessory. Furthermore, upon detection, the AC response of the external audio accessory can be determined, and used to select a set of audio settings to be applied to the audio components of the audio device to optimize the performance of the external audio accessory.

Abstract translation: 用于经由双线音频插孔检测外部音频附件与音频设备的连接的方法和装置包括在连接到音频插孔的音频电路的输出上提供DC偏压。 音频插孔使得当插头插入音频插孔时，直流偏压从音频插孔的内部路由引脚移除。 内部路由引脚上的直流电压变化表示外部音频附件的连接。 此外，在检测到时，可以确定外部音频附件的AC响应，并且用于选择要应用于音频设备的音频组件的一组音频设置，以优化外部音频附件的性能。

公开(公告)号：US20180315443A1

公开(公告)日：2018-11-01

申请号：US15498560

申请日：2017-04-27

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： CHEAH HENG TAN ,  THEAN HAI OOI ,  WEI QING ONG ,  ALAN WEE CHIAT TAN

IPC: G10L25/84 ,  G10L25/21 ,  G10L25/18

CPC classification number: G10L25/84 ,  G10L25/03 ,  G10L25/18 ,  G10L2025/786

Abstract: A voice activity detection system (100) filters audio input frames (102), on a frame=by-frame basis through a gammatone filterbank (104) to generate filtered gammatone output signals (106). A signal energy calculator (108) takes the filtered gammatone output signals and generates a plurality of energy envelopes. Weighting factors are constructed (112) are applied to each of the energy envelopes thereby producing normalized weighted signal (116), in which voice regions are emphasized and noise regions are minimized. An entropy measurement (118) is taken to extract information from the normalized weighted signals (116) and generate an entropy signal (120). The entropy signal (120) is averaged and compared to an adaptive entropy threshold (122), indicative of a noise floor. Decision logic (124) is used to identifying speech and noise from the comparison of the averaged entropy signal to the adaptive entropy threshold.

公开(公告)号：US20160134956A1

公开(公告)日：2016-05-12

申请号：US14539739

申请日：2014-11-12

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： CHEAH HENG TAN ,  KHENG SHIANG TEH ,  PEK BING TEO

IPC: H04R1/08 ,  G10L17/22

CPC classification number: H04R3/005 ,  G10L25/84 ,  H04R1/1041 ,  H04R2410/05 ,  H04R2460/13

Abstract: A communication device is configured to receive signals using at least one acoustic microphone and at least one structural microphone. The communication device calculates one of first a signal-to-noise (SNR) ratio and a speech-to-noise ratio for the at least one acoustic microphone from received signals and calculates a SNR for the at least one structural microphone from received signals. The communication device compares one of the first SNR and the speech-to-noise ratio for the at least one acoustic microphone with the SNR for the at least one structural microphone. The communication device selects one of the at least one acoustic microphone and at least one structural microphone to receive speech responsive to the comparing and places a selected one of the at least one acoustic microphone and at least one structural microphone in a standby mode.

Abstract translation: 通信设备被配置为使用至少一个声学麦克风和至少一个结构麦克风来接收信号。 通信装置根据接收到的信号计算至少一个声学麦克风的第一信噪比（SNR）比和语音噪声比之一，并根据接收信号计算出至少一个结构麦克风的SNR。 通信设备将至少一个声学麦克风的第一SNR和语音噪声比之一与用于至少一个结构麦克风的SNR进行比较。 所述通信设备选择所述至少一个声学麦克风和至少一个结构麦克风中的一个，以响应于所述至少一个声学麦克风和至少一个结构麦克风中的所选择的一个在待机模式下进行比较并接收语音。

公开(公告)号：US20170149461A1

公开(公告)日：2017-05-25

申请号：US15127469

申请日：2014-04-30

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： JIAN HAN ,  CHARLES H CARTER ,  JESUS F CORRETJER ,  MENG-GE DUAN ,  YI GAO ,  CHEAH HENG TAN

IPC: H04B1/10 ,  H04B1/00 ,  G10L21/02 ,  G10L25/78 ,  G10L21/0364 ,  G10L25/21

CPC classification number: H04B1/1018 ,  G10L21/0205 ,  G10L21/0364 ,  G10L25/21 ,  G10L25/78 ,  H04B1/0057 ,  H04M9/082

Abstract: A method and apparatus for distinguishing voice signals that are played together over the same speaker employs spectral reshaping of one or more of the audio signals. The spectral reshaping shifts modifies the timber of the voice signal while not modifying the pitch of the voice signal. Additional techniques can be used to further distinguish voice signals, such as dynamic gain offset and frequency shifting. After processing one or more signals to spectrally reshape them, they can be played over the same speaker. A user hearing the resulting acoustic signal will be more able to distinguish between the multiple voice signals being played.

公开(公告)号：US20150086026A1

公开(公告)日：2015-03-26

申请号：US14037900

申请日：2013-09-26

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： CHEAH HENG TAN ,  FRIEDRICH J. BOLLMANN ,  TEIK SENG SAW ,  PETER WILLIAM HILDING SVENDSEN ,  KHENG SHIANG TEH

IPC: H04R3/00

CPC classification number: H04R3/007 ,  H04R9/022 ,  H04R2209/024 ,  H04R2209/041

Abstract: An intrinsically safe audio circuit and intrinsically safe portable two-way radio device meet conventional audio output requirements and intrinsically safe design limitations by separating the speaker coil of the device's speaker into separate coils to limit the energy storage possible in any one of the coils. Each separate coil is driven by one of several different audio power amplifiers that each output a substantially identical signal, and each of which are current limited.

Abstract translation: 本质安全的音频电路和本质安全的便携式双向无线电设备通过将设备扬声器的扬声器线圈分离成单独的线圈来限制任何一个线圈中的能量存储，从而满足传统的音频输出要求和本质安全的设计限制。 每个单独的线圈由几个不同的音频功率放大器中的一个驱动，每个音频功率放大器输出基本相同的信号，并且其中的每个都是电流限制的。

公开(公告)号：US20170136886A1

公开(公告)日：2017-05-18

申请号：US14942904

申请日：2015-11-16

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： DIPTI V. DESAI ,  DANIEL J. JAKL ,  WILLIAM B. KIGER ,  EDMOND LOUIE ,  FRANCESCA SCHULER ,  CHEAH HENG TAN

IPC: B60L11/18 ,  H02J7/02 ,  H02J7/00

CPC classification number: B60L11/182 ,  B60R16/03 ,  H02J7/0052 ,  H02J7/025

Abstract: An apparatus, system and method for wirelessly charging are provided within a vehicular environment. The wireless charging system (500) comprises a seatbelt receptacle (102) containing a transmit coil (104) integrated therein for transmitting a charging signal to a battery or powering a battery operated device. A repeater coil (506) may be wirelessly coupled to the transmit coil (104) via the seatbelt's buckle, as a buckle repeater coil (206) or a retrofit cover repeater coil (308). Additional repeater coils (514, 524) may be added to a shoulder strap (510), lap strap (520), or other portions of the seat belt harness for additional charging points. The additional repeater coils (514, 524) are slideable to adjust for different body sizes. One or more portable devices having receive coils can be charged or powered wirelessly from the transmit coil (104) in the seatbelt receptacle (102), the repeater coil (506) of the seatbelt buckle or cover, and/or the additional adjustable strap repeater coils (514, 524).

公开(公告)号：US20150138020A1

公开(公告)日：2015-05-21

申请号：US14081681

申请日：2013-11-15

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： ROSHAN BAPURAO KHOBRAGADE ,  SOLOMON ARULANANDAM LORTHU ,  CHEAH HENG TAN ,  WOOI PING TEOH

IPC: H01Q1/24

CPC classification number: H01Q1/243 ,  H01Q9/42 ,  H01Q21/28 ,  Y10T29/49016

Abstract: A radio device housing uses an exterior layer or surface made of an electrically conductive anti-static material that is formed over an interior or inner layer that is made of a non-conductive material. The anti-static material prevents the accumulation of static charge on the device housing in accordance with intrinsically safe design standards. An antenna portion is formed on a section of the non-conductive material that is not covered by the conductive material. An antenna element is disposed on the antenna portion and coupled to a radio circuit inside the device.

Abstract translation: 无线电设备外壳使用形成在由非导电材料制成的内部或内部层上的导电抗静电材料制成的外层或表面。 防静电材料可以根据本质安全的设计标准防止静电荷堆积在设备外壳上。 天线部分形成在不被导电材料覆盖的非导电材料的一部分上。 天线元件设置在天线部分上并且耦合到设备内部的无线电电路。

公开(公告)号：US20150111622A1

公开(公告)日：2015-04-23

申请号：US14057414

申请日：2013-10-18

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： CHEAH CHAN KEE ,  MARIA C. FORERO MUJICA ,  DEBORAH A. GRUENHAGEN ,  CHI MENG KHONG ,  DHARMENDRASINH R. MAHIDA ,  ANDREW P. MIEHL ,  BAN HIN OOI ,  BERNIE PENG CHUNG TAN ,  CHEAH HENG TAN

IPC: H04M1/02

CPC classification number: H04M1/03 ,  H04B1/3888 ,  H04M1/18 ,  H04M1/23

Abstract: An improved keypad and speaker assembly is provided. The assembly (100) comprises a speaker grille formed of torturous porting (220), and a keyboard (108) comprising audio slots (120) which are offset beneath the tortuous porting (220). The speaker (104) is aligned beneath the keyboard (108). The tortuous porting (220) and audio slots (120) provide an unobstructed air passage/path between the speaker and ambient while protecting against water intrusion.

Abstract translation: 提供改进的键盘和扬声器组件。 组件（100）包括由弯曲端口（220）形成的扬声器格栅和包括在曲折端口（220）下方偏移的音频槽（120）的键盘（108）。 扬声器（104）在键盘（108）下方对准。 曲折的端口（220）和音频槽（120）在扬声器和环境之间提供无阻碍的空气通道/路径，同时防止水侵入。