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公开(公告)号：US20250106576A1
公开(公告)日：2025-03-27
申请号：US18916598
申请日：2024-10-15
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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公开(公告)号：US20180204581A1
公开(公告)日：2018-07-19
申请号：US15921859
申请日：2018-03-15
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Michael M. Truman , Mark S. Vinton
IPC: G10L19/02 , G10L21/0388 , G10L21/038 , G10L19/26 , G10L19/028
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: 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：US09905236B2
公开(公告)日：2018-02-27
申请号：US14384350
申请日：2013-03-21
Inventor： Heiko Purnhagen , Leif Sehlstrom , Lars Villemoes , Glenn N. Dickins , Mark S. Vinton
Abstract: An audio communication endpoint receives a bitstream containing spectral components representing spectral content of an audio signal, wherein the spectral components relate to a first range extending up to a first break frequency, above which any spectral components are unassigned. The endpoint adapts the received bitstream in accordance with a second range extending up to a second break frequency by removing spectral components or adding neutral-valued spectral components relating to a range between the first and second break frequencies. The endpoint then attenuates spectral content in a neighborhood of the least of the first and second break frequencies for thereby achieving a gradual spectral decay. After this, reconstructing the audio signal is reconstructed by an inverse transform operating on spectral components relating to said second range in the adapted and attenuated received bitstream. At small computational expense, the endpoint may to adapt to different sample rates in received bitstreams.
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公开(公告)号：US09794716B2
公开(公告)日：2017-10-17
申请号：US15025074
申请日：2014-09-26
Applicant: DOLBY LABORATORIES LICENSING CORPORATION
Inventor： Alan J. Seefeldt , Mark S. Vinton , C. Phillip Brown
IPC: H04S5/00 , H04S7/00 , G10L19/008 , G10L19/032
CPC classification number: H04S5/005 , G10L19/008 , G10L19/032 , H04S7/30 , H04S2400/01 , H04S2400/11
Abstract: An audio processing system, such as an upmixer, may be capable of separating diffuse and non-diffuse portions of N input audio signals. The upmixer may be capable of detecting instances of transient audio signal conditions. During instances of transient audio signal conditions, the up-mixer may be capable of adding a signal-adaptive control to a diffuse signal expansion process in which M audio signals are output. The upmixer may vary the diffuse signal expansion process over time such that during instances of transient audio signal conditions the diffuse portions of audio signals may be distributed substantially only to output channels spatially close to the input channels. During instances of non-transient audio signal conditions, the diffuse portions of audio signals may be distributed in a substantially uniform manner.
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公开(公告)号：US09548060B1
公开(公告)日：2017-01-17
申请号：US15258415
申请日：2016-09-07
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Michael M. Truman , Mark S. Vinton
IPC: G10L21/0388 , G10L19/03 , G10L19/02 , G10L19/012 , G10L19/16 , G10L21/038
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 extracting temporal envelope information and spectral components of the baseband portion. The method further includes obtaining a decoded baseband audio signal. The obtaining 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 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。 该方法包括提取基带部分的时间包络信息和频谱分量。 该方法还包括获得解码的基带音频信号。 所述获取包括使用所述时间包络信息，利用重构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。 该方法还包括提取高频部分的噪声参数和估计的频谱包络，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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Patent Agency Ranking
公开(公告)号：US09466306B1
公开(公告)日：2016-10-11
申请号：US15203528
申请日：2016-07-06
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Michael M. Truman , Mark S. Vinton
IPC: G10L21/0388 , G10L21/038 , G10L19/03 , G10L19/02 , G10L19/26 , G10L19/16
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.
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17.发明申请公开(公告)号：US20160232911A1
公开(公告)日：2016-08-11
申请号：US15098459
申请日：2016-04-14
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Michael M. Truman , Mark S. Vinton
IPC: G10L19/16 , G10L19/028 , G10L19/26 , G10L19/02
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: 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 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 an estimated spectral envelope of the highband portion, a spectral envelope of the high-frequency reconstructed signal. The method further includes generating a noise component based on a 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 to obtain a time-domain reconstructed audio signal. The method may be implemented by an audio decoding device comprising one or more hardware elements.
Abstract translation: 根据本发明的一个方面，公开了一种用于重建具有基带部分和高频带部分的音频信号的方法。 该方法包括通过解码编码的音频信号来获得解码的基带音频信号，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中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的音频信号，以获得时域重建的音频信号。 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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公开(公告)号：US09343071B2
公开(公告)日：2016-05-17
申请号：US14735663
申请日：2015-06-10
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Michael M. Truman , Mark S. Vinton
IPC: G10L19/00 , G10L21/038 , G10L19/012 , G10L21/00 , G10L19/02 , 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 decoding the first part to obtain a decoded baseband audio signal. The method also includes extracting an estimated spectral envelope of the highband portion and a noise parameter from the second part and filtering the decoded baseband audio signal to obtain a plurality of subband signals. 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 adjusting a spectral envelope of the high-frequency reconstructed signal based on the estimated spectral envelope of the highband portion to obtain an envelope adjusted high-frequency 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分解成第一部分和第二部分，并对第一部分进行解码以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估计频谱包络和噪声参数，并对解码的基带音频信号进行滤波以获得多个子带信号。 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构信号，并且基于高频部分的估计频谱包络来调整高频重构信号的频谱包络，以获得高频重构信号 信封调整高频信号。
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公开(公告)号：US20150179182A1
公开(公告)日：2015-06-25
申请号：US14573251
申请日：2014-12-17
Applicant: DOLBY LABORATORIES LICENSING CORPORATION
Inventor： Mark S. Vinton
IPC: G10L19/012 , G10L19/032
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.
Abstract translation: 一种方法，包括对表示编码的音频内容的编码音频信号（例如，在电话会议期间捕获的音频内容）进行解码以产生指示音频内容的解码版本的解码信号，以及对解码信号执行自适应量化噪声滤波的步骤 。 响应于指示信噪比的数据，在频域中自适应地执行滤波，这表示编码音频内容的至少一个段中的每一个的每个频带的后量化信号到量化噪声比， 。 在一些实施例中，每个信噪比值是等于编码音频内容的段的频带的编码音频样本的尾数位数的位分配值。 其他方面是被配置为执行自适应滤波的实施例的解码器或后滤波器，用于接收解码器的输出。
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20.发明公开公开(公告)号：US20230394287A1
公开(公告)日：2023-12-07
申请号：US18248805
申请日：2021-10-12
Inventor： Cong Zhou , Mark S. Vinton , Grant A. Davidson , Lars Villemoes
IPC: G06N3/0475 , G06N3/044 , G06N3/045
CPC classification number: G06N3/0475 , G06N3/044 , G06N3/045
Abstract: A neural network system for predicting frequency coefficients of a media signal, the neural network system comprising a time predicting portion including at least one neural network trained to predict a first set of output variables representing a specific frequency band of a current time frame given coefficients of one or several previous time frames, and a frequency predicting portion including a at least one neural network trained to predict a second set of output variables representing a specific frequency band given coefficients of one or several frequency bands adjacent to the specific frequency band in said current time frame. Such a neural network system forms a predictor capable of capturing both temporal and frequency dependencies occurring in time-frequency tiles of a media signal.
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