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公开(公告)号：US09672833B2
公开(公告)日：2017-06-06
申请号：US14194192
申请日：2014-02-28
Applicant: GOOGLE INC.
Inventor： Willem Bastiaan Kleijn , Turaj Zakizadeh Shabestary
CPC classification number: G10L19/02 , G10H2210/051 , G10H2210/061 , G10H2250/235 , G10H2250/541 , G10L15/14 , G10L19/005 , G10L19/04 , G10L19/06
Abstract: Provided are methods and systems for concealing missing segments and/or discontinuities in an audio signal, thereby restoring the continuity of the signal. The methods and systems are designed for and targeted at audio signals, are based on interpolation and extrapolation operations for sinusoids, and do not rely on the assumption that the sinusoids are harmonic. The methods and systems are improvements over existing audio concealment approaches in that, among other advantages, the methods and systems facilitate asynchronous interpolation, use an interpolation procedure that corresponds to time-domain waveform interpolation if the signal is harmonic, and have a peak selection procedure that is effective for audio signals.
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公开(公告)号：US09323601B2
公开(公告)日：2016-04-26
申请号：US14036959
申请日：2013-09-25
Applicant: GOOGLE INC.
Inventor： Chrisitian Feldbauer , Willem Bastiaan Kleijn
IPC: H04J1/16 , H03M13/00 , G06F11/10 , G10L19/005 , G10L19/24 , H03M7/30 , H03M13/37 , H04N19/15 , H04N19/115 , H04N19/164 , H04N19/166
CPC classification number: G06F11/10 , G10L19/005 , G10L19/24 , H03M7/30 , H03M13/373 , H03M13/6312 , H04N19/115 , H04N19/15 , H04N19/164 , H04N19/166
Abstract: A system for transmitting data packets representing a source signal across a packet data network is provided. Additionally provided are methods and an apparatus for encoding parameters representing the source signal and also decoding these parameters. The system allows adaptation to the loss scenario of data packets transmitted across the packet data network. A redundancy encoding is generated with a bit rate continuously scalable, the bit rate being provided by a bit rate controller that uses input from the network and packet-loss rate information. The specification can be changed for each coding block. At the decoder, recovery is performed by a parameter estimator based on a dynamically generated statistical model of the effect of the quantizers. The method may be added to existing lossy source coding systems or may be used to enhance the quality of the reconstructed source signal even in scenarios without packet loss.
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公开(公告)号：US10332530B2
公开(公告)日：2019-06-25
申请号：US15417550
申请日：2017-01-27
Applicant: Google Inc.
Inventor： Willem Bastiaan Kleijn , Jan Skoglund , Sze Chie Lim
Abstract: A method includes: receiving a representation of a soundfield, the representation characterizing the soundfield around a point in space; decomposing the received representation into independent signals; and encoding the independent signals, wherein a quantization noise for any of the independent signals has a common spatial profile with the independent signal.
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公开(公告)号：US09866955B2
公开(公告)日：2018-01-09
申请号：US14466565
申请日：2014-08-22
Applicant: GOOGLE INC.
Inventor： Willem Bastiaan Kleijn , Petko N. Petkov
IPC: H04B15/00 , H04R3/00 , G10L21/0208 , G10L21/0364 , G10L15/14 , G10L15/20 , G10L15/22
CPC classification number: H04R3/002 , G10L15/142 , G10L15/20 , G10L21/0208 , G10L21/0364 , G10L2015/227
Abstract: Provided are methods and systems for enhancing the intelligibility of an audio (e.g., speech) signal rendered in a noisy environment, subject to a constraint on the power of the rendered signal. A quantitative measure of intelligibility is the mean probability of decoding of the message correctly. The methods and systems simplify the procedure by approximating the maximization of the decoding probability with the maximization of the similarity of the spectral dynamics of the noisy speech to the spectral dynamics of the corresponding noise-free speech. The intelligibility enhancement procedures provided are based on this principle, and all have low computational cost and require little delay, thus facilitating real-time implementation.
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公开(公告)号：US10141000B2
公开(公告)日：2018-11-27
申请号：US15182751
申请日：2016-06-15
Applicant: GOOGLE INC.
Inventor： Minyue Li , Jan Skoglund , Willem Bastiaan Kleijn
IPC: G10L19/24 , G10L19/008 , G10L19/02 , G10L19/035 , G10L19/16 , G10L19/00
Abstract: Provided are methods, systems, and apparatus for hierarchical decorrelation of multichannel audio. A hierarchical decorrelation algorithm is designed to adapt to possibly changing characteristics of an input signal, and also preserves the energy of the original signal. The algorithm is invertible in that the original signal can be retrieved if needed. Furthermore, the proposed algorithm decomposes the decorrelation process into multiple low-complexity steps. The contribution of these steps is generally in a decreasing order, and thus the complexity of the algorithm can be scaled.
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Patent Agency Ranking
公开(公告)号：US20180218740A1
公开(公告)日：2018-08-02
申请号：US15417550
申请日：2017-01-27
Applicant: Google Inc.
Inventor： Willem Bastiaan Kleijn , Jan Skoglund , Sze Chie Lim
IPC: G10L19/008 , G10L19/20 , G10L19/24 , H04S3/00
CPC classification number: G10L19/008 , G10L19/173 , G10L19/20 , G10L19/24 , H04S3/002 , H04S3/008 , H04S7/308 , H04S2420/11
Abstract: A method includes: receiving a representation of a soundfield, the representation characterizing the soundfield around a point in space; decomposing the received representation into independent signals; and encoding the independent signals, wherein a quantization noise for any of the independent signals has a common spatial profile with the independent signal.
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公开(公告)号：US20180182412A1
公开(公告)日：2018-06-28
申请号：US15412812
申请日：2017-01-23
Applicant: Google Inc.
Inventor： Willem Bastiaan Kleijn , Sze Chie Lim
IPC: G10L21/0308 , G10L25/18 , G10L25/63 , G10L25/87
Abstract: A method includes: receiving time instants of audio signals generated by a set of microphones at a location; determining a distortion measure between frequency components of at least some of the received audio signals; determining a similarity measure for the frequency components using the determined distortion measure; and processing the audio signals based on the determined similarity measure.
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公开(公告)号：US09502021B1
公开(公告)日：2016-11-22
申请号：US14510838
申请日：2014-10-09
Applicant: GOOGLE INC.
Inventor： Willem Bastiaan Kleijn
IPC: G10K11/175
CPC classification number: G10K11/348 , G10L21/0216 , G10L21/0316 , G10L2021/02166
Abstract: Provided are methods and systems for spatially selecting acoustic sources using a post-processor that consists of a selection of one postfilter from a set of postfilters, or a cascade of postfilters, where each postfilter is optimal for a particular scenario. Each postfilter individually is based on optimizing the gain for each time-frequency bin based on knowledge of (i) a spatial covariance matrix for the desired source, (ii) a spatial covariance matrix for the interfering sources, and (iii) microphone signals in some neighborhood of the current time-frequency bin.
Abstract translation: 提供了使用后处理器来空间选择声源的方法和系统，后处理器由一组后置滤波器的选择一个后滤波器或后置滤波器级联组成，其中每个后滤波器对于特定情景是最佳的。 每个后置滤波器单独地基于基于（i）所需源的空间协方差矩阵，（ii）干扰源的空间协方差矩阵的知识来优化每个时间频率仓的增益，以及（iii）麦克风信号 当前时区的一些邻域。
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公开(公告)号：US10770091B2
公开(公告)日：2020-09-08
申请号：US15412812
申请日：2017-01-23
Applicant: Google Inc.
Inventor： Willem Bastiaan Kleijn , Sze Chie Lim
IPC: G10L21/028 , G10L21/0308
Abstract: A method includes: receiving time instants of audio signals generated by a set of microphones at a location; determining a distortion measure between frequency components of at least some of the received audio signals; determining a similarity measure for the frequency components using the determined distortion measure; and processing the audio signals based on the determined similarity measure.
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公开(公告)号：US09488716B2
公开(公告)日：2016-11-08
申请号：US14145196
申请日：2013-12-31
Applicant: GOOGLE INC.
Inventor： Nikolay D. Gaubitch , Willem Bastiaan Kleijn , Richard Heusdens
Abstract: Provided are methods and systems for calibrating a distributed sensor (e.g., microphone) array using time-of-flight (TOF) measurements for a plurality of spatially distributed acoustic events at the sensors. The calibration includes localization and gain equalization of the sensors. Accurate measurements of TOFs are obtained from spatially distributed acoustic events using a controlled signal emitted at known intervals by a moving acoustic source. A portable user device capable of playing out audio is used to produce a plurality of acoustic events (e.g., sound clicks) at known intervals of time and at different, but arbitrary locations based on the device being moved around in space by a user while producing the acoustic events. As such, the times of the acoustic event generation are known, and are spatially diverse. The calibration signals emitted by the acoustic source are designed to provide robustness to noise and reverberation.
Abstract translation: 提供了使用在传感器处的多个空间分布的声学事件的飞行时间（TOF）测量来校准分布式传感器（例如，麦克风）阵列的方法和系统。 校准包括传感器的定位和增益均衡。 使用由移动声源以已知间隔发射的受控信号从空间分布的声学事件获得TOF的精确测量。 使用能够播放音频的便携式用户装置在已知的时间间隔和在不同的但任意的位置上产生多个声音事件（例如，声音点击），这是基于用户在空间中移动的装置，同时产生 声学事件。 因此，声学事件发生的时代是已知的，并且在空间上是多样的。 由声源发出的校准信号被设计成提供对噪声和混响的鲁棒性。
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