公开(公告)号：US09619199B2

公开(公告)日：2017-04-11

申请号：US15098511

申请日：2016-04-14

Applicant: DOLBY LABORATORIES LICENSING CORPORATION ,  DOLBY INTERNATIONAL AB

Inventor： Jeroen Koppens ,  Jeffrey Riedmiller ,  Kristofer Kjoerling ,  Alexander Groeschel ,  Holger Hoerich ,  Alan J. Seefeldt

IPC: H03G7/00 ,  G06F3/16 ,  H03G9/00 ,  G10L19/16 ,  H03G3/30 ,  H03G9/12 ,  H04S1/00 ,  H04S7/00 ,  G10L21/0324

CPC classification number: G06F3/165 ,  G10L19/167 ,  G10L21/0324 ,  H03G3/3005 ,  H03G3/3089 ,  H03G7/002 ,  H03G7/007 ,  H03G9/005 ,  H03G9/12 ,  H04S1/00 ,  H04S7/30 ,  H04S2400/13

Abstract: In an audio encoder, for audio content received in a source audio format, default gains are generated based on a default dynamic range compression (DRC) curve, and non-default gains are generated for a non-default gain profile. Based on the default gains and non-default gains, differential gains are generated. An audio signal comprising the audio content, the default DRC curve, and differential gains is generated. In an audio decoder, the default DRC curve and the differential gains are identified from the audio signal. Default gains are re-generated based on the default DRC curve. Based on the combination of the re-generated default gains and the differential gains, operations are performed on the audio content extracted from the audio signal.

公开(公告)号：US20170094409A1

公开(公告)日：2017-03-30

申请号：US15275162

申请日：2016-09-23

Applicant: Apple Inc.

Inventor： Frank Baumgarte

IPC: H04R3/04 ,  H03G5/16 ,  H03G7/00 ,  G10L19/16

CPC classification number: H04R3/04 ,  G06F3/165 ,  G10L19/00 ,  G10L19/167 ,  H03G5/165 ,  H03G7/007 ,  H04N21/8113 ,  H04N21/84 ,  H04R2430/01

Abstract: Dynamic loudness equalization of received audio content in a playback system, using metadata that includes instantaneous loudness values for the audio content. A playback level is derived from a user volume setting of the playback system, and is compared with a mixing level that is assigned to the audio content. Parameters are computed, that define an equalization filter that is filtering the audio content before driving a speaker with the filtered audio content, based on the instantaneous loudness values and the comparing of the playback level with the assigned mixing level. Other embodiments are also described and claimed.

公开(公告)号：US20170093356A1

公开(公告)日：2017-03-30

申请号：US14871363

申请日：2015-09-30

Applicant: Lenovo (Singapore) Pte. Ltd.

Inventor： Gary David Cudak ,  Nathan J. Peterson ,  Amy Leigh Rose ,  Jennifer Lee-Baron ,  John Scott Crowe ,  Bryan Loyd Young

IPC: H03G7/00 ,  H04W4/00 ,  H04W4/02 ,  G06F3/16

Abstract: One embodiment provides a method, including: detecting, using a processor, a presence of a known device within a predetermined range; and adjusting, using the processor, an audio output volume based on the presence of the known device. Other aspects are described and claimed.

公开(公告)号：US09607624B2

公开(公告)日：2017-03-28

申请号：US14226596

申请日：2014-03-26

Applicant: Apple Inc.

Inventor： Frank M. Baumgarte

IPC: G10L19/00 ,  G10L21/00 ,  G10L19/02 ,  G10L19/008 ,  G10L19/032 ,  G10L19/16 ,  H03G7/00

CPC classification number: G10L19/02 ,  G10L19/008 ,  G10L19/032 ,  G10L19/167 ,  H03G7/002 ,  H03G7/007

Abstract: A system for encoding and applying Dynamic Range Control/Compression (DRC) gain values to a piece of sound program content is described. In particular, a set of DRC gain values representing a DRC gain curve for the piece of content may be divided into frames corresponding to frames of the piece of content. A set of fields may be included with an audio signal representing the piece of content. The additional fields may represent the DRC gain values using linear or spline interpolation. The additional fields may include 1) an initial gain value for each DRC frame, 2) a set of slope values at particular points in the DRC curve, 3) a set of time delta values for each consecutive pair of slope values, and/or 4) one or more gain delta values representing changes of DRC gain values in the DRC gain curve between points of the slope values.

公开(公告)号：US09571055B2

公开(公告)日：2017-02-14

申请号：US14657331

申请日：2015-03-13

Applicant: YAMAHA CORPORATION

Inventor： Mitsutaka Goto ,  Kenji Suzuki

IPC: H04R29/00 ,  H03G3/30 ,  H03G7/00

CPC classification number: H03G3/301 ,  H03G3/3089 ,  H03G7/002 ,  H03G7/007 ,  H04R2430/01 ,  H04S2400/13

Abstract: A level of an input signal is detected according to a first following rate, and a first level signal indicating the detected level is generated. A level of the input signal is detected according to a second following rate lower than the first following rate, and a second level signal indicating the detected level is generated. One of the first and second level signals is selected based on a relation (e.g., ratio) between the first and second level signals so that a gain is determined based on the selected one of the first and second level signals. The level of the first input signal is adjusted according to the determined gain. For example, if the level variation is dominant, the gain adjustment suitable for the level variation can be performed, whereas, if the stable level is dominant, the gain adjustment suitable for the stable level can be performed.

Abstract translation: 根据第一跟随速率检测输入信号的电平，并且产生指示检测到的电平的第一电平信号。 根据低于第一跟随速率的第二跟随速率来检测输入信号的电平，并且产生指示检测到的电平的第二电平信号。 基于第一和第二电平信号之间的关系（例如，比率）来选择第一和第二电平信号中的一个，使得基于第一和第二电平信号中选择的一个确定增益。 根据确定的增益调整第一输入信号的电平。 例如，如果电平变化是主导的，则可以执行适合于电平变化的增益调整，而如果稳定电平是主要的，则可以执行适合于稳定电平的增益调整。

公开(公告)号：US09565497B2

公开(公告)日：2017-02-07

申请号：US14449159

申请日：2014-08-01

Applicant: Caavo Inc

Inventor： Ashish Dharmpal Aggarwal ,  Sharath Hariharpur Satheesh

IPC: H04R3/00 ,  H04R3/04 ,  H03G3/20 ,  H03G5/16 ,  H04R25/00 ,  G06F3/16 ,  G10L25/51 ,  H03G3/30 ,  G10L21/0232 ,  H03G7/00 ,  H03H17/04 ,  H04R1/08 ,  H04R29/00

CPC classification number: H04R3/04 ,  G06F3/165 ,  G10L21/0232 ,  G10L25/51 ,  H03G3/20 ,  H03G3/3005 ,  H03G3/32 ,  H03G5/005 ,  H03G5/165 ,  H03G7/002 ,  H03H17/04 ,  H03H2017/0472 ,  H04R1/08 ,  H04R3/00 ,  H04R25/50 ,  H04R25/505 ,  H04R29/00 ,  H04R29/001 ,  H04R29/004 ,  H04R2430/01 ,  H04R2499/11

Abstract: Embodiment disclosed herein enable detection and improvement of the quality of the audio signal using a mobile device by determining the loss in the audio signal and enhancing audio by streaming the remainder portion of audio. Embodiments disclosed herein enable an improvement in the sound quality rendered by rendering devices by emitting an test audio signal from the source device, measuring the test audio signal using microphones, detecting variation in the frequency response, loudness and timing characteristics using impulse responses and correcting for them. Embodiments disclosed herein also compensate for the noise in the acoustic space by determining the reverberation and ambient noise levels and their frequency characteristics and changing the digital filters and volumes of the source signal to compensate for the varying noise levels.

Abstract translation: 本文公开的实施例通过确定音频信号的损失并通过流式传输音频的剩余部分来增强音频，从而能够利用移动设备来检测和改善音频信号的质量。 本文公开的实施例能够通过从源设备发射测试音频信号，使用麦克风测量测试音频信号，使用脉冲响应来检测频率响应的变化，响度和定时特性来改善渲染设备所呈现的声音质量， 他们。 本文公开的实施例还通过确定混响和环境噪声水平及其频率特性以及改变源信号的数字滤波器和体积以补偿变化的噪声水平来补偿声学空间中的噪声。

公开(公告)号：US09544707B2

公开(公告)日：2017-01-10

申请号：US15134761

申请日：2016-04-21

Applicant: Sonos, Inc.

Inventor： Aurelio Rafael Ramos

IPC: H04R5/02 ,  H04S7/00 ,  H04R11/00 ,  H04R3/04 ,  H03G3/00 ,  H04R3/14 ,  H04R5/04 ,  H04R27/00 ,  H03G7/00 ,  H04S1/00

CPC classification number: H04R27/00 ,  G06F3/165 ,  H03G3/001 ,  H03G7/002 ,  H04R3/04 ,  H04R3/14 ,  H04R5/04 ,  H04R11/00 ,  H04R29/007 ,  H04R2227/003 ,  H04R2227/005 ,  H04R2430/01 ,  H04R2430/03 ,  H04S1/007 ,  H04S7/307 ,  H04S7/308 ,  H04S2400/01

Abstract: An example implementation involves a first playback device receiving audio content to be played back by the first playback device and a second playback device in synchrony. The audio content includes a first stereo component to be played by the first playback device and a second stereo component to be played by the second playback device. The first playback device determines a first limiting result that represents playback of the second stereo component by a second playback device by applying, to the second stereo component, a pre-determined volume-limiting function that is associated with the second playback device. The first playback device determines another volume-limiting function based on the first limiting result and applies the determined volume-limiting function to the first stereo component when playing the first stereo component in synchrony with the playback of the second stereo component by the second playback device.

Abstract translation: 示例性实现涉及第一播放设备，其接收由第一播放设备和第二播放设备同步播放的音频内容。 音频内容包括要由第一播放设备播放的第一立体声分量和要由第二播放设备播放的第二立体声分量。 第一播放装置通过向第二立体声部件应用与第二播放装置相关联的预定音量限制功能来确定第二播放装置表示第二立体声部分的重放的第一限制结果。 第一播放装置基于第一限制结果确定另一个音量限制功能，并且当与第二播放装置的第二立体声部件的再现同步地播放第一立体声部件时，将所确定的音量限制功能应用于第一立体声部件 。

公开(公告)号：US20160378430A1

公开(公告)日：2016-12-29

申请号：US15262491

申请日：2016-09-12

Applicant: EchoStar Techonogies L.L.C.

Inventor： Bernard A. McCarthy

IPC: G06F3/16 ,  H04N21/485 ,  G06F3/0484 ,  H03G7/00 ,  H03G3/32

CPC classification number: G06F3/165 ,  G06F3/04842 ,  H03G3/32 ,  H03G7/007 ,  H04N21/4852

Abstract: Volume limiting systems and methods are operable to limit volume output from media presentation devices. An exemplary embodiment detects a sound using a microphone, wherein the sound corresponds to an audio output of at least one controlled media presentation device, and wherein the microphone is remotely located from the at least one controlled media presentation device; compares a level of the detected sound with a predefined maximum volume limit; generates a volume output limit command in response to the detected sound exceeding the predefined maximum volume limit; and communicates the volume output limit command to the media presentation device. The media presentation device then reduces a volume level of its audio output. In some instances, volume may be limited during user specified periods.

公开(公告)号：US09515619B2

公开(公告)日：2016-12-06

申请号：US14598331

申请日：2015-01-16

Applicant: Robert Bosch GmbH

Inventor： Josef Plager ,  Patrick Engl ,  Thomas Stein

IPC: H03F99/00 ,  H03F3/181 ,  H03G7/00 ,  H03G11/00

CPC classification number: H03F3/181 ,  H03F2200/321 ,  H03G7/007 ,  H03G11/008

Abstract: An amplifier arrangement for amplifying an audio input signal AES into an audio output signal AAS, having a conditioning apparatus for converting the audio input signal AES into a conditioned intermediate signal ZS. The conditioning apparatus includes an audio input interface for accepting the audio input signal and a digital data processing device. The amplifier arrangement also includes an amplifier apparatus for amplifying the intermediate signal ZS into the audio output signal AAS and the amplifier apparatus has at least one operating voltage BS. The amplifier arrangement also includes a limiting module for limiting the audio output signal AAS by changing a gain parameter VK.

Abstract translation: 一种用于将音频输入信号AES放大成音频输出信号AAS的放大器装置，具有用于将音频输入信号AES转换成调节中间信号ZS的调节装置。 调节装置包括用于接受音频输入信号的音频输入接口和数字数据处理装置。 放大器装置还包括用于将中间信号ZS放大到音频输出信号AAS的放大器装置，并且放大器装置具有至少一个工作电压BS。 放大器装置还包括限制模块，用于通过改变增益参数VK来限制音频输出信号AAS。

公开(公告)号：US09473102B2

公开(公告)日：2016-10-18

申请号：US14745897

申请日：2015-06-22

Applicant: ROHM CO., LTD.

Inventor： Takeshi Onodera

IPC: H03G7/00 ,  H03G9/02 ,  H03G9/00

CPC classification number: H03G9/025 ,  H03G9/005

Abstract: Level adjusting circuit for adjusting level of input audio signal, includes: N filters, N being integer of two or more; N dynamic range compression (DRC) circuits corresponding to N filters; adder; (N−1) band pass filters corresponding to crossover frequencies of N filters; and (N−1) gain correcting units corresponding to (N−1) band pass filters. Each filter receives and passes input audio signal through its respective set band. ith (1≦i≦N) DRC circuit amplifies signal from ith filter and adjust its gain to prevent level of its output signal from exceeding threshold level. Adder adds each of output signals of DRC circuits. jth (1≦j≦N−1) band pass filter passes band including crossover frequencies of jth and (j+1)th filters from output signal of adder. jth gain correcting unit adjusts at least one of gains of jth and (j+1)th DRC circuits based on level of output signal of jth band pass filter.

Abstract translation: 用于调节输入音频信号电平的电平调节电路，包括：N个滤波器，N为2或更大的整数; N个滤波器对应的N个动态范围压缩（DRC）电路; 加法器 （N-1）个带通滤波器，对应于N个滤波器的交叉频率; 和（N-1）个带通滤波器的（N-1）增益校正单元。 每个滤波器通过其各自的设定频带接收和传递输入音频信号。 ith（1≤i≤N）DRC电路放大第i个滤波器的信号并调整其增益，以防止其输出信号的电平超出阈值电平。 加法器添加DRC电路的每个输出信号。 第j（1≤j≤N-1）带通滤波器通过加法器输出信号包括第j和第（j + 1）个滤波器的交叉频率的频带。 第j增益校正单元基于第j个带通滤波器的输出信号的电平来调整第j和第（j + 1）个DRC电路的增益中的至少一个。