公开(公告)号：EP4379718A2

公开(公告)日：2024-06-05

申请号：EP24165595.0

申请日：2012-04-17

Applicant: Sonos, Inc.

Inventor： MILLINGTON, Nicholas ,  CULLEN, Tom ,  REIMANN, Robert ,  LEHMANN, Brent

IPC: G11B27/10

CPC classification number: H03G3/10 ,  H03G3/3026

Abstract: A method for a playback device. The playback device is configured to receive a first audio signal from a first audio source and to receive a second audio signal from a second audio source. The method comprises: playing back the second audio signal from the second audio source at a first volume level; while playing back the second audio signal, determining that the first audio signal is present from the first audio source; and in response to determining that the first audio signal is present, causing the first playback device to playback the first audio signal at a second volume level.

公开(公告)号：EP3347985A1

公开(公告)日：2018-07-18

申请号：EP15759808.7

申请日：2015-09-07

Applicant: TDK Corporation

Inventor： ROMBACH, Pirmin Hermann Otto ,  ROCCA, Gino ,  LEIDL, Anton ,  SCHOBER, Armin

IPC: H03G3/30 ,  H04R1/04

CPC classification number: H03G3/3026 ,  H03F3/183 ,  H03F2200/03 ,  H03G3/301 ,  H03G5/16 ,  H04R1/04 ,  H04R3/00 ,  H04R2410/00

Abstract: The present invention relates to an integrated circuit comprising at least one supply voltage terminal (262) configured to receive a supply voltage for operation of the integrated circuit, at least one input terminal (122, 124) configured to receive an analog input signal corresponding to an audio signal, and at least one output terminal (132, 134) configured to provide an analog output signal. The integrated circuit further comprises a signal strength detector configured to detect the signal strength of the analog input signal. The integrated circuit is configured to amplify the audio signal based on the detected signal strength and to output a corresponding amplified signal at the at least one output terminal (132, 134), and a signaling circuit configured to indicate an amplification setting of the integrated circuit at the at least one output terminal (132, 134) . The invention further relates to a circuit assembly (100, 300) comprising a signal source (110), a signal processing device (190, 390) and an amplification circuit and a method for operating such a circuit assembly (100, 300).

公开(公告)号：EP3262849A1

公开(公告)日：2018-01-03

申请号：EP15707350.3

申请日：2015-02-27

Applicant: TDK Corporation

Inventor： ROCCA, Gino ,  HANZLIK, Tomasz

IPC: H04R3/00 ,  H03F3/187 ,  H03F1/30 ,  H04R29/00

CPC classification number: H03G3/3026 ,  H03F1/0272 ,  H03F1/26 ,  H03F1/304 ,  H03F3/187 ,  H03F2200/03 ,  H03F2200/15 ,  H03F2200/24 ,  H03F2200/411 ,  H03F2200/511 ,  H03F2200/519 ,  H03F2200/525 ,  H04R3/00 ,  H04R29/004 ,  H04R2201/003

Abstract: An integrated circuit arrangement for a microphone, a microphone system and a method for adjusting circuit parameters of the microphone are disclosed. In an embodiment an integrated circuit includes an amplifier circuit with a first switchable network circuit for adjusting an amplifier current of the amplifier circuit, the first switchable network circuit comprising a plurality of switches (SW1, . . . ,SWx) each coupled with a first control port of the first switchable network circuit and a control unit coupled with the first control port of the first switchable network circuit and configured to control a setting of the respective switches (SW1, . . . ,SWx) of the first switchable network circuit.

公开(公告)号：EP3111677A1

公开(公告)日：2017-01-04

申请号：EP15754660.7

申请日：2015-02-27

Applicant: DTS, Inc.

Inventor： MALAK, Fadi ,  KATSIANOS, Themis ,  JOT, Jean-Marc

IPC: H04S7/00

CPC classification number: H03G7/00 ,  G10L19/008 ,  H03G3/002 ,  H03G3/3026 ,  H04S7/30 ,  H04S2400/11 ,  H04S2400/13

Abstract: A method and apparatus for processing object-based audio signals is provided. The apparatus receives a plurality of object-based audio signals. Each object-based audio signal of the object-based audio signals includes audio waveform data and object metadata associated with the audio waveform data. The object metadata includes at least one of a loudness parameter or a power parameter associated with the audio waveform data. The apparatus determines a loudness metric based on the received object-based audio signals and based on the at least one of the loudness parameter or the power parameter for each object-based audio signal of the received object-based audio signals. In one configuration, the apparatus renders the received object-based audio signals to a set of output signals based on the determined loudness metric. In another configuration, the apparatus transmits (e.g., broadcast, file delivery, or streaming) the received object-based audio signals based on the determined loudness metric.

Abstract translation: 提供了一种用于处理基于对象的音频信号的方法和装置。 该装置接收多个基于对象的音频信号。 基于对象的音频信号的基于对象的音频信号包括与音频波形数据相关联的音频波形数据和对象元数据。 对象元数据包括与音频波形数据相关联的响度参数或功率参数中的至少一个。 该装置基于接收到的基于对象的音频信号，并且基于接收到的基于对象的音频信号的每个基于对象的音频信号的响度参数或功率参数中的至少一个来确定响度度量。 在一种配置中，设备基于所确定的响度度量将所接收的基于对象的音频信号呈现为一组输出信号。 在另一配置中，设备基于所确定的响度度量来发送（例如，广播，文件传送或流传输）所接收的基于对象的音频信号。

公开(公告)号：EP3073794A4

公开(公告)日：2016-11-16

申请号：EP14760981

申请日：2014-02-18

Applicant: ZTE CORP

Inventor： JIN HAIBING

IPC: H04W52/52 ,  H03G3/30 ,  H04W52/02

CPC classification number: H04W52/0261 ,  H03G3/3026 ,  H03G3/3042 ,  H04W52/52 ,  Y02B60/50 ,  Y02D70/00

Abstract: Provided is a method and device for reducing the power consumption of a mobile terminal. The method for reducing the power consumption of the mobile terminal includes the following steps: the current transmitting power of the mobile terminal and the current gain switching point of a power amplifier are obtained; when the difference between the obtained current transmitting power and the current gain switching point is less than a preset gain difference, the current gain switching point of the mobile terminal is increased by a first preset value. In the method for reducing the power consumption of the mobile terminal provided by the disclosure, when the difference between the obtained current transmitting power and the current gain switching point is less than the preset gain difference, the current gain switching point of the mobile terminal is increased by the first preset value, so that the low-medium gain working range of the power amplifier of the mobile terminal is extended, and the Power-Added Efficiency (PAE) is improved, thereby reducing the power consumption of the power amplifier.

公开(公告)号：EP3022840A1

公开(公告)日：2016-05-25

申请号：EP14826594.5

申请日：2014-07-18

Applicant: Harman International Industries, Incorporated

Inventor： PUTTA, Satish, K. ,  PENG, Shaomin, Sharon

IPC: H03G3/20 ,  H04R3/00

CPC classification number: H03G7/004 ,  H03G3/02 ,  H03G3/3026 ,  H04R3/00 ,  H04R2430/01

Abstract: A volume controller may maintain a volume mapping including a plurality of zones of volume level, each zone defined according to a range of included volume levels and specifying a volume ramp up control rate and a volume ramp down control rate for adjustment of volume levels within the range, determine, according to the volume mapping based on a current volume level and a direction of a requested volume change, a step value for adjusting the current volume level, and adjust the current volume level according to the step value.

公开(公告)号：EP2317647B1

公开(公告)日：2015-12-16

申请号：EP09252520.3

申请日：2009-10-30

Applicant: ST-Ericsson SA

Inventor： Teng, Robert Hwat Hian

IPC: G01R19/175 ,  H03G3/30 ,  H03K5/1536 ,  H03G1/00

CPC classification number: H03G1/0088 ,  G01R19/175 ,  H03G3/3026 ,  H03K5/1536

公开(公告)号：EP2301148A1

公开(公告)日：2011-03-30

申请号：EP09779714.6

申请日：2009-06-10

Applicant: Robert Bosch GmbH

Inventor： MAIER, Martin ,  TAFFNER, Josef ,  PLAGER, Josef

IPC: H03F3/217

CPC classification number: H03F3/217 ,  H03G3/3026

Abstract: Audio amplifiers are used in many known forms in music systems, for example for domestic use or for playing music in cinemas, discos etc., but also in public address systems, as are known, for example, in public buildings, schools, universities etc. for making announcements. The invention proposes an audio amplifier (1) for amplifying an input signal into an output signal using an output amplifier stage (6), wherein the output amplifier stage (6) is designed to amplify an intermediate signal into the output signal, and wherein the output amplifier stage (6) is in the form of an amplifier which operates in switching mode, and having a limiter device (4) which is designed, from a program and/or circuit point of view, to generate the intermediate signal on the basis of the input signal, wherein the level of the intermediate signal is always limited as a function of an adjustable maximum level in such a way that the output signal does not exceed the maximum level independently of the input signal.

公开(公告)号：EP1865598A2

公开(公告)日：2007-12-12

申请号：EP07104520.7

申请日：2007-03-20

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： KIM, Sung-woo ,  KIM, Yun-yong ,  KIM, Nam-in 1003-2102, Bangjuk-maeul

IPC: H03G3/30 ,  H03G7/00 ,  H03G11/00

CPC classification number: H03G3/3026 ,  H03G7/001 ,  H03G11/002

Abstract: Provided are input-gain control apparatus and method of an audio amplifier. A gain of an acoustic signal is automatically attenuated based on a pre-set limited level to minimize distortion of the acoustic signal caused by clipping of the acoustic signal, and thereby limit an over-input of the acoustic signal to input the acoustic signal within a dynamic range if the acoustic signal is not input within the dynamic range in an audio apparatus including an acoustic amplifier and a switching amplifier. Thus, only a gain of an over-input signal on a specific level or more can be attenuated while an original form of the over-input signal is maintained to minimize distortion of an output waveform caused by clipping of the output waveform. Also, a harmonic distortion and a stepped high frequency noise occurring during clipping can be simultaneously removed.

Abstract translation: 提供了一种音频放大器的输入增益控制装置和方法。 声信号的增益将基于预设的有限级别而自动衰减，以最小化由声信号的限幅引起的声信号的失真，从而限制声信号的过输入以将声信号输入到 如果声音信号在包括声学放大器和开关放大器的音频装置的动态范围内未被输入，则动态范围。 因此，只有在特定电平以上的过输入信号的增益才能衰减，同时维持过输入信号的原始形式，以最小化由输出波形的削波引起的输出波形的失真。 此外，可以同时去除在剪切期间发生的谐波失真和阶跃式高频噪声。

公开(公告)号：EP1253711A3

公开(公告)日：2003-12-17

申请号：EP02252142.1

申请日：2002-03-25

Applicant: Pioneer Corporation

Inventor： Honda, Jun, c/o Pioneer Tokorozawa Plant

IPC: H03G5/16 ,  H03F3/217

CPC classification number: H03G5/165 ,  H03G3/3026

Abstract: A class D amplifier is provided with a frequency characteristic compensation function. An automatic frequency characteristic compensation circuit is disposed at an input unit of a class D amplifier. The frequency characteristic of the class D amplifier is automatically measured while a load is connected, using a test signal having a predetermined frequency and signal level. An inverse characteristic is computed for compensating the frequency characteristic to the design frequency characteristic, and the inverse characteristic is set in the automatic frequency characteristic compensation circuit.

Abstract translation: D类放大器具有频率特性补偿功能。 自动频率特性补偿电路设置在D类放大器的输入单元上。 使用具有预定频率和信号电平的测试信号，在连接负载时自动测量D类放大器的频率特性。 计算用于补偿设计频率特性的频率特性的逆特性，并且在自动频率特性补偿电路中设置逆特性。