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公开(公告)号：US20230328469A1
公开(公告)日：2023-10-12
申请号：US18309145
申请日：2023-04-28
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Louis D. Fielder , Zhiwei Shuang , Grant A. Davidson , Xiguang Zheng , Mark S. Vinton
CPC classification number: H04S3/004 , H04S7/302 , G10K15/08 , H04S2420/01 , H04S7/304 , H04S2400/01 , H04S5/005
Abstract: The present disclosure relates to reverberation generation for headphone virtualization. A method of generating one or more components of a binaural room impulse response (BRIR) for headphone virtualization is described. In the method, directionally-controlled reflections are generated, wherein directionally-controlled reflections impart a desired perceptual cue to an audio input signal corresponding to a sound source location. Then at least the generated reflections are combined to obtain the one or more components of the BRIR. Corresponding system and computer program products are described as well.
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公开(公告)号：US20220415334A1
公开(公告)日：2022-12-29
申请号：US17779258
申请日：2020-12-03
Applicant: DOLBY LABORATORIES LICENSING CORPORATION
Inventor： Grant A. Davidson , Louis D. Fielder , Mark S. Vinton
IPC: G10L19/032 , G01L19/04
Abstract: The present disclosure relates to the field of audio coding, in particular, it relates to a method for encoding audio signals through a masking model based on a hearing threshold of frequency intervals of the audio signal and a measured energy of the audio signal for the corresponding frequency intervals. The disclosure further relates to an encoder that is capable of carrying out the audio encoding method.
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公开(公告)号：US10529347B2
公开(公告)日：2020-01-07
申请号：US16268448
申请日：2019-02-05
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Michael M. Truman , Mark S. Vinton
IPC: G10L19/028 , G10L19/02 , G10L21/038 , G10L19/012 , G10L21/00 , G10L19/00 , G10L21/0388 , G10L19/16 , G10L19/26 , G10L19/06 , G10L19/03 , G10L19/002
Abstract: According to an aspect of the present invention, a method for reconstructing an audio signal having a baseband portion and a highband portion is disclosed. The method includes obtaining a decoded baseband audio signal by decoding an encoded audio signal and obtaining a plurality of subband signals by filtering the decoded baseband audio signal. The method further includes generating a high-frequency reconstructed signal by copying a number of consecutive subband signals of the plurality of subband signals and obtaining an envelope adjusted high-frequency signal. The method further includes generating a noise component based on a noise parameter. Finally, the method includes adjusting a phase of the high-frequency reconstructed signal and obtaining a time-domain reconstructed audio signal by combining the decoded baseband audio signal and the combined high-frequency signal to obtain a time-domain reconstructed audio signal.
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公开(公告)号：US10269362B2
公开(公告)日：2019-04-23
申请号：US15921859
申请日：2018-03-15
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Michael M. Truman , Mark S. Vinton
IPC: G10L19/00 , G10L19/02 , G10L19/03 , G10L19/06 , G10L19/16 , G10L19/26 , G10L21/00 , G10L19/002 , G10L19/012 , G10L19/028 , G10L21/038 , G10L21/0388
Abstract: According to an aspect of the present invention, a method for reconstructing an audio signal having a baseband portion and a highband portion is disclosed. The method includes obtaining a decoded baseband audio signal by decoding an encoded audio signal and obtaining a plurality of subband signals by filtering the decoded baseband audio signal. The method further includes generating a high-frequency reconstructed signal by copying a number of consecutive subband signals of the plurality of subband signals and obtaining an envelope adjusted high-frequency signal. The method further includes generating a noise component based on a noise parameter. Finally, the method includes adjusting a phase of the high-frequency reconstructed signal and obtaining a time-domain reconstructed audio signal by combining the decoded baseband audio signal and the combined high-frequency signal to obtain a time-domain reconstructed audio signal.
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公开(公告)号：US10149082B2
公开(公告)日：2018-12-04
申请号：US15550424
申请日：2016-02-11
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Louis D. Fielder , Zhiwei Shuang , Grant A. Davidson , Xiguang Zheng , Mark S. Vinton
Abstract: The present disclosure relates to reverberation generation for headphone virtualization. A method of generating one or more components of a binaural room impulse response (BRIR) for headphone virtualization is described. In the method, directionally-controlled reflections are generated, wherein directionally-controlled reflections impart a desired perceptual cue to an audio input signal corresponding to a sound source location. Then at least the generated reflections are combined to obtain the one or more components of the BRIR. Corresponding system and computer program products are described as well.
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Patent Agency Ranking
公开(公告)号：US09830916B2
公开(公告)日：2017-11-28
申请号：US14766371
申请日：2014-01-22
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Vinay Melkote , Kuan-Chieh Yen , Grant A. Davidson , Matthew Fellers , Mark S. Vinton , Vivek Kumar
Abstract: Audio processing methods may involve receiving audio data corresponding to a plurality of audio channels. The audio data may include a frequency domain representation corresponding to filterbank coefficients of an audio encoding or processing system. A decorrelation process may be performed with the same filterbank coefficients used by the audio encoding or processing system. The decorrelation process may be performed without converting coefficients of the frequency domain representation to another frequency domain or time domain representation. The decorrelation process may involve selective or signal-adaptive decorrelation of specific channels and/or specific frequency bands. The decorrelation process may involve applying a decorrelation filter to a portion of the received audio data to produce filtered audio data. The decorrelation process may involve using a non-hierarchal mixer to combine a direct portion of the received audio data with the filtered audio data according to spatial parameters.
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公开(公告)号：US09741351B2
公开(公告)日：2017-08-22
申请号：US14573251
申请日：2014-12-17
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Mark S. Vinton
IPC: G10L21/02 , G10L21/0208 , G10L19/26 , G10L19/032 , G10L25/03
CPC classification number: G10L19/032 , G10L19/26 , G10L21/02 , G10L21/0208 , G10L25/03
Abstract: A method including steps of decoding an encoded audio signal indicative of encoded audio content (e.g., audio content captured during a teleconference) to generate a decoded signal indicative of a decoded version of the audio content, and performing adaptive quantization noise filtering on the decoded signal. The filtering is performed adaptively in the frequency domain in response to data indicative of signal to noise values in turn indicative of a post-quantization signal-to-quantization noise ratio for each frequency band of each of at least one segment of the encoded audio content. In some embodiments, each signal to noise value is a bit allocation value equal to the number of mantissa bits of an encoded audio sample of a frequency band of a segment of the encoded audio content. Other aspects are decoder, or post-filter coupled to receive a decoder's output, configured to perform an embodiment of the adaptive filtering.
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公开(公告)号：US20170103761A1
公开(公告)日：2017-04-13
申请号：US15287953
申请日：2016-10-07
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Xuejing Sun , Kai Li , Mark S. Vinton , Shen Huang
IPC: G10L19/005 , G10L19/02 , G10L19/028
CPC classification number: G10L19/005 , G10L19/0204 , G10L19/028
Abstract: A method of encoding audio information for forward error correction reconstruction of a transmitted audio stream over a lossy packet switched network, the method including the steps of: (a) dividing the audio stream into audio frames; (b) determining a series of corresponding audio frequency bands for the audio frames; (c) determining a series of power envelopes for the frequency bands; (d) encoding the envelopes as a low bit rate version of the audio frame in a redundant transmission frame.
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公开(公告)号：US20160314796A1
公开(公告)日：2016-10-27
申请号：US15203528
申请日：2016-07-06
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Michael M. Truman , Mark S. Vinton
CPC classification number: G10L19/0208 , G10L19/0017 , G10L19/002 , G10L19/012 , G10L19/02 , G10L19/0204 , G10L19/0212 , G10L19/028 , G10L19/03 , G10L19/06 , G10L19/16 , G10L19/167 , G10L19/173 , G10L19/26 , G10L19/265 , G10L21/00 , G10L21/038 , G10L21/0388
Abstract: A method for generating a reconstructed audio signal having a baseband portion and a highband portion is disclosed. The method includes deformatting an encoded audio signal into a first part and a second part and extracting, from the first part, temporal envelope information and spectral components of the baseband portion. The method further includes decoding the first part to obtain a decoded baseband audio signal. The decoding includes filtering in a frequency domain at least some of the spectral components of the baseband portion with the reconstruction filter using the temporal envelope information to shape a temporal envelope of the baseband portion. The method also includes extracting, from the second part, a noise parameter and an estimated spectral envelope of the highband portion and obtaining a plurality of subband signals by filtering the decoded baseband audio signal. The method further includes generating a high-frequency reconstructed signal by copying a number of consecutive subband signals of the plurality of subband signals and obtaining an envelope adjusted high-frequency signal by adjusting, based on the estimated spectral envelope of the highband portion, a spectral envelope of the high-frequency reconstructed signal.
Abstract translation: 公开了一种用于产生具有基带部分和高带部分的重构音频信号的方法。 该方法包括将经编码的音频信号解压缩成第一部分和第二部分，并从第一部分提取基带部分的时间包络信息和频谱分量。 该方法还包括解码第一部分以获得解码的基带音频信号。 解码包括使用时间包络信息使用重建滤波器在频域中对基带部分的至少一些频谱分量进行滤波，以形成基带部分的时间包络。 该方法还包括从第二部分提取高频部分的噪声参数和估计频谱包络，并通过对解码的基带音频信号进行滤波来获得多个子带信号。 该方法还包括通过复制多个子带信号中的多个连续的子带信号来产生高频重建信号，并且通过基于估计的高频带部分的频谱包络来调整光谱，从而获得包络调整的高频信号 高频重构信号的包络。
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30.发明授权公开(公告)号：US09412383B1
公开(公告)日：2016-08-09
申请号：US15098472
申请日：2016-04-14
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Michael M. Truman , Mark S. Vinton
IPC: G10L19/00 , G10L19/028 , G10L19/02 , G10L21/038 , G10L21/0388
CPC classification number: G10L19/0208 , G10L19/0017 , G10L19/002 , G10L19/012 , G10L19/02 , G10L19/0204 , G10L19/0212 , G10L19/028 , G10L19/03 , G10L19/06 , G10L19/16 , G10L19/167 , G10L19/173 , G10L19/26 , G10L19/265 , G10L21/00 , G10L21/038 , G10L21/0388
Abstract: A method for generating a reconstructed audio signal having a baseband portion and a highband portion is disclosed. The method includes deformatting an encoded audio signal into a first part and a second part and obtaining a decoded baseband audio signal by decoding the first part. The method also includes extracting, from the second part, a noise parameter and an estimated spectral envelope of the highband portion and obtaining a plurality of subband signals by filtering the decoded baseband audio signal. The method further includes generating a high-frequency reconstructed signal by copying in a circular manner a number of consecutive subband signals of the plurality of subband signals and obtaining an envelope adjusted high-frequency signal by adjusting, based on the estimated spectral envelope of the highband portion, a spectral envelope of the high-frequency reconstructed signal. The method also includes generating a noise component based on the noise parameter and obtaining a combined high-frequency signal by adding the noise component to the envelope adjusted high-frequency signal. Finally, the method includes obtaining a time-domain reconstructed audio signal by combining the decoded baseband audio signal and the combined high-frequency signal. The method may be implemented by an audio decoding device comprising one or more hardware elements.
Abstract translation: 公开了一种用于产生具有基带部分和高带部分的重构音频信号的方法。 该方法包括将经编码的音频信号分解成第一部分和第二部分，并通过解码第一部分来获得解码的基带音频信号。 该方法还包括从第二部分提取高频部分的噪声参数和估计频谱包络，并通过对解码的基带音频信号进行滤波来获得多个子带信号。 该方法还包括通过以循环方式复制多个子带信号的多个连续的子带信号并产生一个高频重构信号，并通过基于估计的高频带的频谱包络来调整包络调整的高频信号 部分，高频重构信号的频谱包络。 该方法还包括基于噪声参数产生噪声分量，并通过将噪声分量加到包络调整的高频信号上来获得组合的高频信号。 最后，该方法包括通过组合解码的基带音频信号和组合的高频信号来获得时域重建音频信号。 该方法可以由包括一个或多个硬件元件的音频解码设备来实现。
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