公开(公告)号：US20170221502A1

公开(公告)日：2017-08-03

申请号：US15014481

申请日：2016-02-03

Applicant: Google Inc.

Inventor： Yiteng HUANG ,  Alejandro LUEBS ,  Jan SKOGLUND ,  Willem Bastiaan KLEIJN

IPC: G10L21/0264 ,  G10L25/21 ,  G10L21/0308 ,  G10L21/02

CPC classification number: G10L21/0264 ,  G10L21/0205 ,  G10L21/0216 ,  G10L21/0308 ,  G10L21/0364 ,  G10L25/21 ,  G10L2021/02166 ,  H04R3/005

Abstract: Existing post-filtering methods for microphone array speech enhancement have two common deficiencies. First, they assume that noise is either white or diffuse and cannot deal with point interferers. Second, they estimate the post-filter coefficients using only two microphones at a time, performing averaging over all the microphones pairs, yielding a suboptimal solution. The provided method describes a post-filtering solution that implements signal models which handle white noise, diffuse noise, and point interferers. The method also implements a globally optimized least-squares approach of microphones in a microphone array, providing a more optimal solution than existing conventional methods. Experimental results demonstrate the described method outperforming conventional methods in various acoustic scenarios.

公开(公告)号：US20150279386A1

公开(公告)日：2015-10-01

申请号：US14230404

申请日：2014-03-31

Applicant: Google Inc.

Inventor： Jan SKOGLUND ,  Alejandro LUEBS

IPC: G10L21/0208 ,  G10L25/90 ,  G10L25/84

CPC classification number: G10L21/0208 ,  G10L25/78 ,  G10L25/84 ,  G10L25/90

Abstract: Provided are methods and systems for providing situation-dependent transient noise suppression for audio signals. Different strategies (e.g., levels of aggressiveness) of transient suppression and signal restoration are applied to audio signals associated with participants in a video/audio conference depending on whether or not each participant is speaking (e.g., whether a voiced segment or an unvoiced/non-speech segment of audio is present). If no participants are speaking or there is an unvoiced/non-speech sound present, a more aggressive strategy for transient suppression and signal restoration is utilized. On the other hand, where voiced audio is detected (e.g., a participant is speaking), the methods and systems apply a softer, less aggressive suppression and restoration process.

Abstract translation: 提供了用于为音频信号提供与情境相关的瞬态噪声抑制的方法和系统。 瞬态抑制和信号恢复的不同策略（例如，侵略性的水平）被应用于与视频/音频会议中的参与者相关联的音频信号，这取决于每个参与者是否在说话（例如，是否有声音段或无声/非声音 音频片段存在）。 如果没有参与者在说话或存在无声/非语音，则采用更积极的瞬态抑制和信号恢复策略。 另一方面，在检测到有声音频（例如参与者正在说话）的情况下，方法和系统应用更软，更不积极的抑制和恢复过程。