公开(公告)号：US10142731B2

公开(公告)日：2018-11-27

申请号：US15473200

申请日：2017-03-29

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Erwin Goesnar ,  David Gunawan

IPC: H03G11/00 ,  H04R3/04 ,  H04R3/00 ,  H04R29/00 ,  H03F1/32 ,  H03G5/16

Abstract: Systems and methods are described for dynamically suppressing non-linear distortion for a device, such as a speakerphone. A device may receive a signal, where the device has non-linear distortion at a predetermined frequency. The received signal may be analyzed to compute a tone strength parameter and a band level. The received signal may be filtered such that a spectrum of the input signal is dynamically limited by reducing suppression of the non-linear distortion when the tone strength parameter is in a lower portion of a predetermined range and increasing suppression of the non-linear distortion when the tone strength parameter is in an upper portion of the predetermined range, the predetermined range of the tone strength parameter corresponding to a loudness range of the device.

公开(公告)号：US09883314B2

公开(公告)日：2018-01-30

申请号：US15323724

申请日：2015-07-01

Applicant: Dolby Laboratories Licensing Corporation

Inventor： David Gunawan ,  Glenn N. Dickins ,  Richard J. Cartwright

IPC: H04S7/00 ,  H04S3/00

CPC classification number: H04S7/30 ,  H04R2420/01 ,  H04R2430/25 ,  H04S3/002 ,  H04S2400/11 ,  H04S2400/15 ,  H04S2420/05 ,  H04S2420/11

Abstract: A method for altering an audio signal of interest in a multi-channel soundfield representation of an audio environment, the method including the steps of: (a) extracting the signal of interest from the soundfield representation; (b) determining a residual soundfield signal; (c) inputting a further associated audio signal, which is associated with the signal of interest; (d) transforming the associated audio signal into a corresponding associated soundfield signal compatable with the residual soundfield; and (e) combining the residual soundfield signal with the associated soundfield signal to produce an output soundfield signal.

公开(公告)号：US20170127089A1

公开(公告)日：2017-05-04

申请号：US15277027

申请日：2016-09-27

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Dong Shi ,  Xuejing Sun ,  Glenn N. Dickins ,  David Gunawan

IPC: H04N19/86 ,  H04N19/42

CPC classification number: G10L19/0212 ,  H04N19/12 ,  H04N19/136 ,  H04N19/179

Abstract: A method of processing data comprises processing first frequency-domain audio or video data using signal processing of a first type, and transforming the processed first frequency-domain audio or video data to processed time-domain audio or video data using a transform which is the inverse of the first transform, and transforming the processed time-domain audio or video data using a second transform which is matched to a second type of signal processing. The method further comprises identifying time-domain audio or video data for which signal processing of the first type, after transformation using the second transform, would yield satisfactory results. The method further comprises transforming the identified time-domain audio or video data to frequency-domain identified audio or video data using the second transform, instead of using the first transform, and processing the identified frequency-domain audio or video data using signal processing of the first type.

公开(公告)号：US09520140B2

公开(公告)日：2016-12-13

申请号：US14782746

申请日：2014-03-31

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Erwin Goesnar ,  Glenn N. Dickins ,  David Gunawan

IPC: G10L21/0232 ,  G10L21/0208 ,  G10L25/18 ,  G10L25/21

CPC classification number: G10L21/0232 ,  G10L21/0208 ,  G10L25/18 ,  G10L25/21 ,  G10L2021/02082

Abstract: Improved audio data processing method and systems are provided. Some implementations involve dividing frequency domain audio data into a plurality of subbands and determining amplitude modulation signal values for each of the plurality of subbands. A band-pass filter may be applied to the amplitude modulation signal values in each subband, to produce band-pass filtered amplitude modulation signal values for each subband. The band-pass filter may have a central frequency that exceeds an average cadence of human speech. A gain may be determined for each subband based, at least in part, on a function of the amplitude modulation signal values and the band-pass filtered amplitude modulation signal values. The determined gain may be applied to each subband.

Abstract translation: 提供了改进的音频数据处理方法和系统。 一些实施方式涉及将频域音频数据划分成多个子带并且确定多个子带中的每一个的幅度调制信号值。 可以将带通滤波器应用于每个子带中的幅度调制信号值，以产生每个子带的带通滤波的幅度调制信号值。 带通滤波器可以具有超过人类语音的平均节奏的中心频率。 至少部分地基于幅度调制信号值和带通滤波的幅度调制信号值的函数，可以为每个子带确定增益。 确定的增益可以应用于每个子带。

公开(公告)号：US20160006879A1

公开(公告)日：2016-01-07

申请号：US14788963

申请日：2015-07-01

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Glenn N. Dickins ,  Gary Spittle ,  David Gunawan ,  Anthony Tucker

IPC: H04M3/56 ,  H04M9/08

CPC classification number: H04M9/085 ,  H04M3/567 ,  H04M3/568

Abstract: A method in a soundfield-capturing endpoint and the capturing endpoint that comprises a microphone array capturing soundfield, and an input processor pre-processing and performing auditory scene analysis to detect local sound objects and positions, de-clutter the sound objects, and integrate with auxiliary audio signals to form a de-cluttered local auditory scene that has a measure of plausibility and perceptual continuity. The input processor also codes the resulting de-cluttered auditory scene to form coded scene data comprising mono audio and additional scene data to send to others. The endpoint includes an output processor generating signals for a display unit that displays a summary of the de-cluttered local auditory scene and/or a summary of activity in the communication system from received data, the display including a shaped ribbon display element that has an extent with locations on the extent representing locations and other properties of different sound objects.

Abstract translation: 声场捕获端点中的方法和包括麦克风阵列捕获声场的捕获端点，以及输入处理器预处理和执行听觉场景分析以检测局部声音对象和位置，使声音对象变得杂乱，并与 辅助音频信号，形成一个整洁的本地听觉场景，具有可信度和感知连续性的度量。 输入处理器还对所产生的去混乱的听觉场景进行编码，以形成包括单声道音频和附加场景数据的编码场景数据，以发送给他人。 端点包括输出处理器，用于产生用于显示单元的信号，该显示单元从接收到的数据显示去杂乱的本地听觉场景和/或通信系统中的活动概要，该显示器包括成形的带状显示元件，其具有 范围与表示不同声音对象的位置和其他属性的区域的位置。

公开(公告)号：US20140241528A1

公开(公告)日：2014-08-28

申请号：US14187616

申请日：2014-02-24

Applicant: Dolby Laboratories Licensing Corporation

Inventor： David Gunawan ,  Dong Shi ,  Glenn N. Dickins

IPC: H04S7/00

CPC classification number: H04S7/30 ,  G01S3/802 ,  G10L19/008 ,  H04S2400/15

Abstract: In one embodiment, a sound field is mapped by extracting spatial angle information, diffusivity information, and optionally, sound level information. The extracted information is mapped for representation in the form of a Riemann sphere, wherein spatial angle varies longitudinally, diffusivity varies latitudinally, and level varies radially along the sphere. A more generalized mapping employs mapping the spatial angle and diffusivity information onto a representative region exhibiting variations in direction of arrival that correspond to the extracted spatial information and variations in distance that correspond to the extracted diffusivity information.

Abstract translation: 在一个实施例中，通过提取空间角度信息，扩散性信息和可选地声级信息来映射声场。 所提取的信息被映射为黎曼球形式的表示，其中空间角度纵向变化，扩散率在纬度上变化，并且水平面沿球体径向变化。 更广义的映射将空间角度和扩散度信息映射到呈现对应于提取的空间信息的距离方向的变化方向的代表区域和对应于提取的扩散率信息的距离变化。