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1. 发明申请

US20180247642A1 METHOD AND APPARATUS FOR IMPROVING SPONTANEOUS SPEECH RECOGNITION PERFORMANCE 审中-公开
公开(公告)号：US20180247642A1
公开(公告)日：2018-08-30
申请号：US15697923
申请日：2017-09-07
申请人： Electronics and Telecommunications Research Institute
发明人： Hyun Woo KIM , Ho Young JUNG , Jeon Gue PARK , Yun Keun LEE
IPC分类号： G10L15/16 , G10L15/02 , G06N3/08
CPC分类号： G10L15/16 , G06N3/08 , G06N3/084 , G10L15/02 , G10L15/04 , G10L21/04 , G10L25/84 , G10L2015/025 , G10L2015/027
摘要： The present invention relates to a method and apparatus for improving spontaneous speech recognition performance. The present invention is directed to providing a method and apparatus for improving spontaneous speech recognition performance by extracting a phase feature as well as a magnitude feature of a voice signal transformed to the frequency domain, detecting a syllabic nucleus on the basis of a deep neural network using a multi-frame output, determining a speaking rate by dividing the number of syllabic nuclei by a voice section interval detected by a voice detector, calculating a length variation or an overlap factor according to the speaking rate, and performing cepstrum length normalization or time scale modification with a voice length appropriate for an acoustic model.

2. 发明授权

US10014001B2 Wireless audio synchronization 有权
公开(公告)号：US10014001B2
公开(公告)日：2018-07-03
申请号：US15880869
申请日：2018-01-26
申请人： Bose Corporation
发明人： Michael Elliot , Debasmit Banerjee
IPC分类号： G10L21/04 , G10L19/26 , H04R29/00 , H04N21/43 , H04N21/81
CPC分类号： G10L21/04 , G10L19/26 , H04N21/4307 , H04N21/8106 , H04R29/007 , H04R2227/003 , H04R2227/005 , H04R2420/07
摘要： A method of synchronizing playback of audio data sent over a first wireless network from an audio source to a wireless speaker package that is adapted to play the audio data. The method includes comparing a first time period over which audio data was sent over the first wireless network to a second time period over which the audio data was received by the wireless speaker package, and playing the received audio data on the wireless speaker package over a third time period that is related to the comparison of the first and second time periods.

3. 发明授权

US09997167B2 Jitter buffer control, audio decoder, method and computer program 有权
公开(公告)号：US09997167B2
公开(公告)日：2018-06-12
申请号：US14973729
申请日：2015-12-18
申请人： Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
发明人： Stefan Reuschl , Stefan Doehla , Jeremie Lecomte , Manuel Jander
IPC分类号： G10L19/00 , G10L21/00 , H04J3/00 , H04L12/00 , G10L19/022 , H04J3/06 , G10L19/012 , G10L19/04 , G10L21/04
CPC分类号： G10L19/022 , G10L19/012 , G10L19/04 , G10L21/04 , H04J3/0632 , H04J3/0664
摘要： A jitter buffer control for controlling a provision of a decoded audio content on the basis of an input audio content is configured to select a frame-based time scaling or a sample-based time scaling in a signal-adaptive manner. An audio decoder uses such a jitter buffer control.

4. 发明授权

US09940941B2 Cross product enhanced subband block based harmonic transposition 有权
公开(公告)号：US09940941B2
公开(公告)日：2018-04-10
申请号：US15480859
申请日：2017-04-06
申请人： DOLBY INTERNATIONAL AB
发明人： Lars Villemoes
IPC分类号： G10L19/02 , G10L19/025 , G10L19/26
CPC分类号： G10L19/0208 , G10L19/025 , G10L19/265 , G10L21/038 , G10L21/04 , H03G3/00 , H03G3/3089
摘要： The invention provides an efficient implementation of cross-product enhanced high-frequency reconstruction (HFR), wherein a new component at frequency QΩ+rΩ0 is generated on the basis of existing components at Ω and Ω+Ω0. The invention provides a block-based harmonic transposition, wherein a time block of complex subband samples is processed with a common phase modification. Superposition of several modified samples has the net effect of limiting undesirable intermodulation products, thereby enabling a coarser frequency resolution and/or lower degree of oversampling to be used. In one embodiment, the invention further includes a window function suitable for use with block-based cross-product enhanced HFR. A hardware embodiment of the invention may include an analysis filter bank, a subband processing unit configurable by control data and a synthesis filter bank.

5. 发明授权

US09858945B2 Subband block based harmonic transposition 有权
公开(公告)号：US09858945B2
公开(公告)日：2018-01-02
申请号：US15644983
申请日：2017-07-10
申请人： Dolby International AB
发明人： Lars Villemoes
IPC分类号： G10L19/00 , G10L21/038 , G10L19/032 , G10L25/18 , G10L19/02 , G10L19/022 , G10L21/04
CPC分类号： G10L21/038 , G10L19/0204 , G10L19/022 , G10L19/032 , G10L21/04 , G10L25/18
摘要： The present document relates to audio source coding systems which make use of a harmonic transposition method for high frequency reconstruction (HFR), as well as to digital effect processors, e.g. exciters, where generation of harmonic distortion add brightness to the processed signal, and to time stretchers where a signal duration is prolonged with maintained spectral content. A system and method configured to generate a time stretched and/or frequency transposed signal from an input signal is described. The system comprises an analysis filterbank configured to provide an analysis subband signal from the input signal; wherein the analysis subband signal comprises a plurality of complex valued analysis samples, each having a phase and a magnitude. Furthermore, the system comprises a subband processing unit configured to determine a synthesis subband signal from the analysis subband signal using a subband transposition factor Q and a subband stretch factor S. The subband processing unit performs a block based nonlinear processing wherein the magnitude of samples of the synthesis subband signal are determined from the magnitude of corresponding samples of the analysis subband signal and a predetermined sample of the analysis subband signal. In addition, the system comprises a synthesis filterbank configured to generate the time stretched and/or frequency transposed signal from the synthesis subband signal.

6. 发明授权

US09852734B1 Systems and methods for time-scale modification of audio signals 有权
公开(公告)号：US09852734B1
公开(公告)日：2017-12-26
申请号：US14250710
申请日：2014-04-11
申请人： SYNAPTICS INCORPORATED , SYNAPTICS LLC
发明人： Zhuojin Sun , Bingsen Xie
IPC分类号： G10L19/00
CPC分类号： G10L19/00 , G10L21/04
摘要： System and methods are provided for modifying audio signals. A waveform representing an audio signal changing over time is received. A first time length is selected. A first starting point in the waveform is selected. A first pair of adjacent segments of the waveform are determined based at least in part on the first starting point and the first time length. The first pair of adjacent segments each correspond to the first time length. A first difference measure associated with the first pair of adjacent segments is calculated. In response to the first difference measure being smaller than a threshold, compression or expansion of the waveform is performed based at least in part on the first time length and the first starting point.

7. 发明授权

US09735750B2 Cross product enhanced subband block based harmonic transposition 有权
公开(公告)号：US09735750B2
公开(公告)日：2017-08-15
申请号：US14854498
申请日：2015-09-15
申请人： DOLBY INTERNATIONAL AB
发明人： Lars Villemoes
IPC分类号： H03G3/00 , H03G3/30 , G10L21/04 , G10L21/038
CPC分类号： G10L19/0208 , G10L19/025 , G10L19/265 , G10L21/038 , G10L21/04 , H03G3/00 , H03G3/3089
摘要： The invention provides an efficient implementation of cross-product enhanced high-frequency reconstruction (HFR), wherein a new component at frequency QΩ+rΩ0 is generated on the basis of existing components at Ω and Ω+Ω0. The invention provides a block-based harmonic transposition, wherein a time block of complex subband samples is processed with a common phase modification. Superposition of several modified samples has the net effect of limiting undesirable intermodulation products, thereby enabling a coarser frequency resolution and/or lower degree of oversampling to be used. In one embodiment, the invention further includes a window function suitable for use with block-based cross-product enhanced HFR. A hardware embodiment of the invention may include an analysis filter bank, a subband processing unit configurable by control data and a synthesis filter bank.

8. 发明授权

US09502049B2 Time warp activation signal provider, audio signal encoder, method for providing a time warp activation signal, method for encoding an audio signal and computer programs 有权
公开(公告)号：US09502049B2
公开(公告)日：2016-11-22
申请号：US14538751
申请日：2014-11-11
申请人： Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
发明人： Stefan Bayer , Sascha Disch , Ralf Geiger , Guillaume Fuchs , Max Neuendorf , Gerald Schuller , Bernd Edler
IPC分类号： G10L19/00 , G10L21/04 , G10L19/002 , G10L19/028 , G10L19/022 , G10L19/032 , G10L21/043 , G10L25/90 , G10L19/26
CPC分类号： G10L21/04 , G10L19/002 , G10L19/0212 , G10L19/022 , G10L19/028 , G10L19/032 , G10L19/265 , G10L21/043 , G10L25/90
摘要： An audio encoder has a window function controller, a windower, a time warper with a final quality check functionality, a time/frequency converter, a TNS stage or a quantizer encoder, the window function controller, the time warper, the TNS stage or an additional noise filling analyzer are controlled by signal analysis results obtained by a time warp analyzer or a signal classifier. Furthermore, a decoder applies a noise filling operation using a manipulated noise filling estimate depending on a harmonic or speech characteristic of the audio signal.

9. 发明申请

US20160268987A1 ADJUSTING AUDIO SAMPLING USED WITH WIDEBAND AUDIO 审中-公开
标题翻译：调整使用宽带音频的音频采样
公开(公告)号：US20160268987A1
公开(公告)日：2016-09-15
申请号：US14643632
申请日：2015-03-10
申请人： GM GLOBAL TECHNOLOGY OPERATIONS LLC
发明人： Gaurav Talwar , Xufang Zhao , MD Foezur Rahman Chowdhury , Eli Tzirkel-Hancock
IPC分类号： H03G3/00 , G06F3/16
CPC分类号： G06F3/165 , G06F3/162 , G10L15/28 , G10L19/022 , G10L21/04
摘要： A system and method of adjusting digital audio sampling used with wideband audio includes: performing audio sampling on an analog audio signal at an initial sampling rate and an initial bit rate over a wideband audio frequency range; generating a digital audio signal based on the audio sampling; detecting a qualitative error rate between the analog audio signal and the digital audio signal; and decreasing the initial sampling rate, the initial bit rate, or both for sampling subsequent analog audio when the qualitative error is below a threshold.
摘要翻译：调整与宽带音频一起使用的数字音频采样的系统和方法包括：以初始采样率对模拟音频信号进行音频采样，并在宽带音频频率范围内执行初始比特率; 基于音频采样生成数字音频信号; 检测模拟音频信号和数字音频信号之间的定性错误率; 并且当定性误差低于阈值时，降低初始采样率，初始比特率或两者用于对后续模拟音频进行采样。

10. 发明授权

US09374128B2 Apparatus for encoding/decoding multichannel signal and method thereof 有权
公开(公告)号：US09374128B2
公开(公告)日：2016-06-21
申请号：US14822377
申请日：2015-08-10
申请人： SAMSUNG ELECTRONICS CO., LTD.
发明人： Jung-Hoe Kim , Eun Mi Oh
IPC分类号： G10L19/008 , G10L19/00 , G10L21/04 , H04R3/04 , H04B1/66 , G10L19/02 , H04S1/00 , H04S3/02
CPC分类号： G10L19/22 , G10L19/00 , G10L19/008 , G10L19/0212 , G10L19/038 , G10L19/167 , G10L21/04 , G10L2019/0001 , H04B1/665 , H04R3/04 , H04S1/002 , H04S3/02
摘要： Provided is an encoding/decoding apparatus and method of multi-channel signals. The encoding apparatus and method of multi-channel signals may encode phase information of the multi-channel signals using a quantization scheme and a lossless encoding scheme, and the decoding apparatus and method of multi-channel signals may decode the phase information using an inverse-quantization scheme and a lossless decoding scheme.

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