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21. 发明授权

US09930450B2 Audio apparatus, and current control method 有权
公开(公告)号：US09930450B2
公开(公告)日：2018-03-27
申请号：US15151630
申请日：2016-05-11
申请人： ALPINE ELECTRONICS, INC.
发明人： Minoru Matsuyama
IPC分类号： H03G11/00 , H04R3/00 , H03G3/30 , H03G7/00 , H03G7/06 , H03G7/08 , H03F1/02 , H03F3/183 , H03F3/21 , H04R29/00
CPC分类号： H04R3/007 , H03F1/0211 , H03F3/183 , H03F3/21 , H03F2200/03 , H03F2200/462 , H03F2200/465 , H03F2200/471 , H03G3/3005 , H03G7/002 , H03G7/06 , H03G7/08 , H04R29/001 , H04R2499/13
摘要： An audio apparatus includes a signal processor, a power amplifier, a speaker, and a controller. A current consumption prediction unit in the controller predicts current consumption on the basis of a monitoring result of an output level monitoring unit in the signal processor and/or a monitoring result of a power supply voltage monitoring unit in the controller. A limiter control unit in the controller controls a limiter in the signal processor in a normal mode or a current limiting mode on the basis of predicted current consumption. In the current limiting mode, the limiter is controlled so that an attenuation speed higher than that in the normal mode and a threshold value smaller than that in the normal mode are obtained.

22. 发明授权

US09843345B2 Transmitter with quantization noise compensation 有权
公开(公告)号：US09843345B2
公开(公告)日：2017-12-12
申请号：US15017852
申请日：2016-02-08
申请人： Telefonaktiebolaget L M Ericsson (publ)
发明人： Ulf Gustavsson , Johan Thorebäck
IPC分类号： H03F1/32 , H04B1/04 , H03G3/30 , H03G11/00 , H03F1/02 , H04L25/49 , H04L27/36
CPC分类号： H04B1/0475 , H03C2200/0058 , H03F1/0244 , H03F1/3241 , H03F1/3247 , H03F3/24 , H03G3/3042 , H03G11/002 , H04B2001/0408 , H04B2001/0425 , H04L25/49 , H04L25/4902 , H04L27/361 , H04L27/366
摘要： The invention discloses a transmitter comprising a pulse encoder for creating pulses from the amplitude of an input signal to the transmitter, a compensation signal generator for cancelling quantization noise caused by the pulse encoder, a mixer or I/Q modulator for mixing an output of the pulse encoder with the phase of an input signal to the transmitter, said output of the pulse encoder comprising the amplitude of the complex input signal plus the quantization noise caused by the pulse encoder, and an amplifier for creating an output signal from the transmitter. In the transmitter, a control signal (CA) for controlling a function of the amplifier comprises an output signal from the compensation signal generator, and an input signal to the amplifier comprises an output from the mixer having been modulated to a desired frequency.

23. 发明授权

US09800810B2 Imaging apparatus and imaging system 有权
公开(公告)号：US09800810B2
公开(公告)日：2017-10-24
申请号：US15236234
申请日：2016-08-12
申请人： CANON KABUSHIKI KAISHA
发明人： Shin Kikuchi , Kei Ochiai
IPC分类号： H04N5/378 , H04N5/357 , H04N5/359 , H03F3/45 , H03G11/00 , H03F3/08
CPC分类号： H04N5/359 , H03F3/08 , H03F3/45183 , H03F3/45475 , H03F2200/411 , H03F2203/45026 , H03F2203/45512 , H03F2203/45536 , H03F2203/45544 , H03F2203/45618 , H03F2203/45674 , H03F2203/45728 , H03G11/00 , H03G11/002 , H04N5/3575 , H04N5/378
摘要： One imaging apparatus includes a first amplifier circuit, a second amplifier circuit, and a limiter circuit that limits the output of the first amplifier circuit, and further includes a configuration to clamp the output of the limiter circuit. Moreover, another imaging apparatus includes a fully differential amplifier circuit that outputs an amplified noise signal amplified from a noise signal, and an amplified optical signal amplified from an optical signal, and an output limiting circuit that limits each of the amplitude range of the amplified noise signal and the amplitude range the amplified optical signal.

24. 发明授权

US09794687B2 Loudspeaker protection circuitry and methods 有权
公开(公告)号：US09794687B2
公开(公告)日：2017-10-17
申请号：US14867758
申请日：2015-09-28
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： Roberto Napoli , Jason William Lawrence
IPC分类号： H03G11/00 , H04R3/00 , H03G3/00 , H03G3/20 , H04R29/00 , H03G3/30 , H03F1/52
CPC分类号： H04R3/007 , H03F1/52 , H03G3/001 , H03G3/20 , H03G3/3005 , H03G7/002 , H04R29/003 , H04R2430/01
摘要： This application relates to methods and apparatus for thermal protection of a loudspeaker (102). A controller (106) is configured to generate a control signal (Gmod) for modulating the gain of a signal processing chain (101) that drives the loudspeaker. The controller is configured such that the control signal is generated as a function of each of: an indication of voice coil temperature of the loudspeaker (TVC); an indication of power dissipation in the voice coil of the loudspeaker (PVC); and an indication of a reservoir temperature (Tres) of a thermal reservoir for heat flow from the voice coil. The reservoir temperature may be an ambient temperature of the environment or a temperature of a component of the loudspeaker or apparatus that acts as a heat sink.

25. 发明授权

US09729969B2 System and method for bass enhancement 有权
公开(公告)号：US09729969B2
公开(公告)日：2017-08-08
申请号：US15085245
申请日：2016-03-30
申请人： CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD.
发明人： Pär Gunnars Risberg
IPC分类号： H04R3/00 , H04R3/04 , H03G5/16 , H03G9/02 , H03G11/00 , H04R3/12
CPC分类号： H04R3/04 , G10H2210/321 , H03G5/165 , H03G9/025 , H03G11/008 , H04R3/12 , H04R2499/11
摘要： A system and method for enhancing the real and/or perceived bass band of an audio signal is disclosed. A computationally simple yet effective bass band enhancement system for use in consumer electronics applications is disclosed. An audio processing system including bass enhancement functionality for use in a mobile audio system is disclosed.

26. 发明申请

US20170111020A1 System and Method for Distortion Limiting 有权
公开(公告)号：US20170111020A1
公开(公告)日：2017-04-20
申请号：US14918145
申请日：2015-10-20
申请人： Bose Corporation
发明人： Zukui Song , Michael S. Dublin , Jeffery R. Vautin , Christopher J. Cheng
IPC分类号： H03G11/00 , H04R3/04 , H03G5/16 , H04R3/00
CPC分类号： H03G11/00 , H03G5/165 , H04R3/002 , H04R3/007 , H04R3/04 , H04R2430/01
摘要： A system is provided for limiting distortion of an audio speaker. The system includes a first lowpass filter circuitry that is configured to receive a system input signal and generate a first lowpass filtered output signal. The system also includes a first limiter circuitry that is configured to limit the first lowpass filtered output signal. Limiting the first low pass filtered output signal includes reducing an amplitude of the first lowpass filtered output signal below a first predetermined threshold value, thereby to generate a first limited output signal. A second lowpass filter circuitry is configured to receive the first limited output signal and to generate a second lowpass filtered output signal.

27. 发明授权

US09627730B1 Non-magnetic frequency selective limiters and signal-to-noise enhancers 有权
公开(公告)号：US09627730B1
公开(公告)日：2017-04-18
申请号：US14720164
申请日：2015-05-22
申请人： Alexander B. Kozyrev
发明人： Alexander B. Kozyrev
IPC分类号： H03G11/00 , H01P1/20 , H03H7/01 , H03H7/06 , H03H11/00
CPC分类号： H01P1/20 , H03H7/0107 , H03H7/0138 , H03H7/0161 , H03H7/06 , H03H7/1741 , H03H11/00
摘要： A non-magnetic material frequency selective limiter circuit has first and second resonators and a non-linear coupling component. The first resonator oscillates at a fundamental frequency. The second resonator oscillates at one half of the fundamental frequency. The non-linear coupling component non-linearly and parametrically couples the first resonator and the second resonator. The first resonator, second resonator and the non-linear coupling component are arranged so as to reduce the amplitude of an output signal for an input signal of frequency ω when an input signal amplitude is above a voltage threshold value, by converting part of the input signal to a signal at the frequency ω/2. The first resonator, second resonator and the non-linear coupling component are formed of non-magnetic materials.

28. 发明授权

US09525939B2 Overheat protector and protection methodology for electrodynamic loudspeakers 有权
标题翻译：电动扬声器过热保护器和保护方法
公开(公告)号：US09525939B2
公开(公告)日：2016-12-20
申请号：US14511955
申请日：2014-10-10
申请人： ANALOG DEVICES GLOBAL
发明人： Kim Spetzler Berthelsen , Kasper Strange
IPC分类号： H03G11/00 , H04R3/00 , H04R29/00 , H04R9/06
CPC分类号： H04R3/007 , H04R9/06
摘要： The present invention relates in one aspect to a voice coil temperature protector for electrodynamic loudspeakers. The voice coil temperature protector comprises an audio signal input for receipt of an audio signal supplied by an audio signal source and a probe signal source for generation of a low-frequency probe signal. A signal combiner is configured to combine the audio signal with the low-frequency probe signal to provide a composite loudspeaker drive signal comprising an audio signal component and a probe signal component. The voice coil temperature protector comprises a current detector configured for detecting a level of a probe current component flowing through the voice coil in response to the composite loudspeaker drive signal and a current comparator which is configured to comparing the detected level of the probe current component with a predetermined probe current threshold. The predetermined probe current threshold corresponds to a predetermined voice coil temperature via a known temperature dependency of a voice coil resistance. The voice coil temperature protector further comprises a signal controller configured for attenuating a level of the audio signal in response to the probe current component falls below the predetermined probe current threshold.
摘要翻译：本发明在一个方面涉及一种用于电动扬声器的音圈温度保护器。音圈温度保护器包括用于接收由音频信号源提供的音频信号的音频信号输入端和用于产生低频探测信号的探测信号源。信号组合器被配置为将音频信号与低频探测信号组合以提供包括音频信号分量和探测信号分量的复合扬声器驱动信号。音圈温度保护器包括电流检测器，其被配置为响应于复合扬声器驱动信号检测流过音圈的探头电流分量的电平;以及电流比较器，其被配置为将探测电流分量的检测电平与预定的探针电流阈值。预定的探针电流阈值通过音圈电阻的已知温度依赖性对应于预定的音圈温度。音圈温度保护器还包括信号控制器，该信号控制器被配置为响应于探头电流分量而降低到低于预定探针电流阈值的音频信号的电平。

29. 发明申请

US20160352300A1 Digital Signal Processor and Audio Device 审中-公开
标题翻译：数字信号处理器和音频设备
公开(公告)号：US20160352300A1
公开(公告)日：2016-12-01
申请号：US15162877
申请日：2016-05-24
申请人： ZOOM CORPORATION
发明人： Michihito Nozokido
IPC分类号： H03G11/00 , H03F3/183 , H03M1/06
CPC分类号： H03G11/008 , H03F3/183 , H03F2200/03 , H03G7/007 , H03M1/0614 , H03M1/185
摘要： A digital signal processor that is capable of suppressing a signal level of an input analog signal at not more than the maximum voltage for A/D conversion and capable of preventing distortion of an A/D converted digital signal while maintaining a good S/N ratio. The digital signal processor 2 of the present invention includes amplification factor setting mechanisms to set amplification factors of the analog amplifiers to second amplification factors lower than first amplification factors specified by amplification factor adjustment knobs, digital amplifier mechanisms to amplify A/D converted digital signals by third amplification factors lower than the first amplification factors, and digital limiter mechanisms to compare the signal levels of the digital signals amplified by the third amplification factors with a threshold defined in advance and attenuate the digital signals within the range of the third amplification factors based on a result of the comparison.
摘要翻译：一种数字信号处理器，其能够以不大于A / D转换的最大电压来抑制输入模拟信号的信号电平，并且能够防止A / D转换的数字信号的失真，同时保持良好的S / N比。本发明的数字信号处理器2包括放大因子设定机构，用于将模拟放大器的放大系数设定为比放大倍数调节旋钮所规定的第一放大系数低的第二放大系数，放大A / D转换数字信号的数字放大器机构第三放大因子低于第一放大因子，以及数字限幅器机制，用于将由第三放大因子放大的数字信号的信号电平与预先定义的阈值进行比较，并且基于第三放大因子的范围内的数字信号衰减比较的结果。

30. 发明授权

US09496843B1 Smart volume guard 有权
标题翻译：智能音量防护
公开(公告)号：US09496843B1
公开(公告)日：2016-11-15
申请号：US14832822
申请日：2015-08-21
申请人： Nagravision S.A.
发明人： Prabhu Chawandi
IPC分类号： H03G7/00 , H03G11/00
CPC分类号： H03G7/007 , H03G3/3026 , H04R5/04 , H04R29/001 , H04R2430/01
摘要： Aspects of the present disclose involve a method, a device, and a system comprising a processor and a machine-readable storage medium storing a set of instructions for providing audio level safeguards for output audio signals. In example embodiments, the method includes accessing a most recent audio level of an audio output device and determining whether the most recent audio level transgresses a threshold value. Based on determining the most recent audio level transgresses the threshold value, a current audio level output by the audio output device is set to the threshold value. Thereafter, the current audio level is gradually increased, at repeated time intervals, until it reaches the most recent audio level.
摘要翻译：本公开的方面涉及一种方法，设备和包括处理器和机器可读存储介质的系统，所述处理器和机器可读存储介质存储用于为输出音频信号提供音频电平保护的一组指令。在示例实施例中，该方法包括访问音频输出设备的最新音频电平并确定最近的音频电平是否超过阈值。基于确定最近的音频电平越过阈值，由音频输出装置输出的当前音频电平被设置为阈值。此后，当前的音频电平以重复的时间间隔逐渐增加，直到达到最近的音频电平。

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