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    Method, Apparatus, and System for Processing Audio Data
    2.
    发明申请
    Method, Apparatus, and System for Processing Audio Data 有权

    公开(公告)号：US20250054504A1

    公开(公告)日：2025-02-13

    申请号：US18817567

    申请日：2024-08-28

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Zhe Wang

    IPC: G10L19/012 ,  G10L19/02 ,  G10L19/18 ,  G10L19/22 ,  G10L19/26 ,  G10L25/21 ,  G10L25/78

    Abstract: A method for processing an audio signal includes receiving a bitstream corresponding to the audio signal; obtaining a silence insertion descriptor (SID) type of a current frame of the audio signal by decoding the bitstream; obtaining a low-band parameter of the current frame by decoding the bitstream; obtaining a low-band signal of the current frame based on the low-band parameter; obtaining, based on the SID type of the current frame, a high-band parameter of the current frame; obtaining a high-band signal of the current frame based on the high-band parameter; and obtaining a synthesis signal of the current frame based on the low-band signal and the high-band signal.

    Integration of high frequency reconstruction techniques with reduced post-processing delay
    8.
    发明授权
    Integration of high frequency reconstruction techniques with reduced post-processing delay 有权

    公开(公告)号：US11823694B2

    公开(公告)日：2023-11-21

    申请号：US18178396

    申请日：2023-03-03

    Applicant: Dolby International AB

    Inventor： Kristofer Kjoerling ,  Lars Villemoes ,  Heiko Purnhagen ,  Per Ekstrand

    IPC: G10L19/18 ,  G10L21/038

    CPC classification number: G10L19/18 ,  G10L21/038

    Abstract: A method for decoding an encoded audio bitstream is disclosed. The method includes receiving the encoded audio bitstream and decoding the audio data to generate a decoded lowband audio signal. The method further includes extracting high frequency reconstruction metadata and filtering the decoded lowband audio signal with an analysis filterbank to generate a filtered lowband audio signal. The method also includes extracting a flag indicating whether either spectral translation or harmonic transposition is to be performed on the audio data and regenerating a highband portion of the audio signal using the filtered lowband audio signal and the high frequency reconstruction metadata in accordance with the flag. The high frequency regeneration is performed as a post-processing operation with a delay of 3010 samples per audio channel.

    Speech model parameter estimation and quantization
    9.
    发明授权
    Speech model parameter estimation and quantization 有权

    公开(公告)号：US11715477B1

    公开(公告)日：2023-08-01

    申请号：US17716805

    申请日：2022-04-08

    Applicant: Digital Voice Systems, Inc.

    Inventor： Daniel W. Griffin ,  John C. Hardwick

    IPC: G10L19/087 ,  G10L19/038 ,  G10L25/21 ,  G10L19/00 ,  G10L19/18

    CPC classification number: G10L19/038 ,  G10L25/21 ,  G10L19/087 ,  G10L19/18 ,  G10L2019/0002

    Abstract: Quantizing speech model parameters includes, for each of multiple vectors of quantized excitation strength parameters, determining first and second errors between first and second elements of a vector of excitation strength parameters and, respectively, first and second elements of the vector of quantized excitation strength parameters, and determining a first energy and a second energy associated with, respectively, the first and second errors. First and second weights for, respectively, the first error and the second error, are determined and are used to produce first and second weighted errors, which are combined to produce a total error. The total errors of each of the multiple vectors of quantized excitation strength parameters are compared and the vector of quantized excitation strength parameters that produces the smallest total error is selected to represent the vector of excitation strength parameters.

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