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    Low complexity dense transient events detection and coding
    3.
    发明授权
    Low complexity dense transient events detection and coding 有权

    公开(公告)号：US11232804B2

    公开(公告)日：2022-01-25

    申请号：US16628235

    申请日：2018-07-03

    申请人： Dolby International AB

    发明人： Arijit Biswas ,  Michael Schug ,  Harald Mundt

    IPC分类号： G10L19/025 ,  G10L19/032 ,  G10L19/18 ,  H03M7/30 ,  H04B1/66 ,  H04H20/88

    摘要： The present disclosure relates to methods and apparatus for audio coding. A method of encoding a portion of an audio signal comprises determining whether the portion of the audio signal is likely to contain dense transient events, and if it is determined that the portion of the audio signal is likely to contain dense transient events, quantizing the portion of the audio signal using a quantization 5 mode that applies a substantially constant signal-to-noise ratio over frequency for the portion of the audio signal. The present disclosure further relates to a method of detecting dense transient events in a portion of an audio signal.

    METHOD AND APPARATUS FOR HIGH FREQUENCY DECODING FOR BANDWIDTH EXTENSION
    6.
    发明申请
    METHOD AND APPARATUS FOR HIGH FREQUENCY DECODING FOR BANDWIDTH EXTENSION 有权

    公开(公告)号：US20210020187A1

    公开(公告)日：2021-01-21

    申请号：US17030104

    申请日：2020-09-23

    申请人： SAMSUNG ELECTRONICS CO., LTD.

    发明人： Ki-hyun CHOO ,  Eun-mi OH ,  Seon-ho HWANG

    IPC分类号： G10L19/12 ,  G10L21/038 ,  G10L19/18 ,  G10L19/012 ,  G10L19/16

    摘要： Disclosed are a method and an apparatus for high frequency decoding for bandwidth extension. The method for high frequency decoding for bandwidth extension comprises the steps of: decoding an excitation class; transforming a decoded low frequency spectrum on the basis of the excitation class; and generating a high frequency excitation spectrum on the basis of the transformed low frequency spectrum. The method and apparatus for high frequency decoding for bandwidth extension according to an embodiment can transform a restored low frequency spectrum and generate a high frequency excitation spectrum, thereby improving the restored sound quality without an excessive increase in complexity.

    CONCEPT FOR SWITCHING OF SAMPLING RATES AT AUDIO PROCESSING DEVICES
    7.
    发明申请
    CONCEPT FOR SWITCHING OF SAMPLING RATES AT AUDIO PROCESSING DEVICES 审中-公开

    公开(公告)号：US20200381001A1

    公开(公告)日：2020-12-03

    申请号：US16996671

    申请日：2020-08-18

    申请人： Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.

    发明人： Stefan DOEHLA ,  Guillaume FUCHS ,  Bernhard GRILL ,  Markus MULTRUS ,  Grzegorz PIETRZYK ,  Emmanuel RAVELLI ,  Markus SCHNELL

    IPC分类号： G10L19/24 ,  G10L19/16 ,  G10L19/20 ,  G10L19/18 ,  G10L19/22

    摘要： Audio decoder device for decoding a bitstream, the audio decoder device including: a predictive decoder for producing a decoded audio frame from the bitstream, wherein the predictive decoder includes a parameter decoder for producing one or more audio parameters for the decoded audio frame from the bitstream and wherein the predictive decoder includes a synthesis filter device for producing the decoded audio frame by synthesizing the one or more audio parameters for the decoded audio frame; a memory device including one or more memories, wherein each of the memories is configured to store a memory state for the decoded audio frame, wherein the memory state for the decoded audio frame of the one or more memories is used by the synthesis filter device for synthesizing the one or more audio parameters for the decoded audio frame; and a memory state resampling device configured to determine the memory state for synthesizing the one or more audio parameters for the decoded audio frame, which has a sampling rate, for one or more of the memories by resampling a preceding memory state for synthesizing one or more audio parameters for a preceding decoded audio frame, which has a preceding sampling rate being different from the sampling rate of the decoded audio frame, for one or more of the memories and to store the memory state for synthesizing of the one or more audio parameters for the decoded audio frame for one or more of the memories into the respective memory.