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    EFFICIENT DRC PROFILE TRANSMISSION
    1.
    发明申请
    EFFICIENT DRC PROFILE TRANSMISSION 有权

    公开(公告)号：US20240395270A1

    公开(公告)日：2024-11-28

    申请号：US18781163

    申请日：2024-07-23

    Applicant: DOLBY INTERNATIONAL AB

    Inventor： Holger HOERICH ,  Jeroen KOPPENS

    IPC: G10L19/16 ,  G10L19/26 ,  G10L21/0364 ,  H03G7/00 ,  H03G9/00 ,  H04N21/233

    Abstract: A method for decoding an encoded audio signal is described. The encoded audio signal may comprise a sequence of frames and may be indicative of a plurality of different dynamic range control (DRC) profiles for a corresponding plurality of different rendering modes. Different subsets of DRC profiles may be comprised within different frames. The method may comprise determining a first rendering mode from the plurality of different rendering modes; determining one or more DRC profiles from a subset of DRC profiles comprised within a current frame; determining whether at least one of the DRC profiles is applicable to the first rendering mode; selecting a default DRC profile as a current DRC profile, if none of the DRC profiles is applicable to the first rendering mode; wherein definition data of the default DRC profile is known at a decoder; and decoding the current frame using the current DRC profile.

    FRAME CONVERSION FOR ADAPTIVE STREAMING ALIGNMENT
    2.
    发明申请
    FRAME CONVERSION FOR ADAPTIVE STREAMING ALIGNMENT 有权

    公开(公告)号：US20210258632A1

    公开(公告)日：2021-08-19

    申请号：US16973762

    申请日：2019-06-27

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION ,  DOLBY INTERNATIONAL AB

    Inventor： Michael Donald HOFFMANN ,  Christof FERSCH ,  Marvin PRIBADI ,  Holger HOERICH

    IPC: H04N21/435 ,  H04N21/61 ,  H04N21/2343

    Abstract: Methods for generating an AV bitstream (e.g., an MPEG-2 transport stream or bitstream segment having adaptive streaming format) such that the AV bitstream includes at least one video I-frame synchronized with at least one audio I-frame, e.g., including by re-authoring at least one video or audio frame (as a re-authored I-frame or a re-authored P-frame). Typically, a segment of content of the AV bitstream which includes the re-authored frame starts with an I-frame and includes at least one subsequent P-frame. Other aspects are methods for adapting such an AV bitstream, audio/video processing units configured to perform any embodiment of the inventive method, and audio/video processing units which include a buffer memory which stores at least one segment of an AV bitstream generated in accordance with any embodiment of the inventive method.

    High Frequency Regeneration of an Audio Signal with Synthetic Sinusoid Addition
    5.
    发明申请
    High Frequency Regeneration of an Audio Signal with Synthetic Sinusoid Addition 有权
    具有合成正弦曲线加法的音频信号的高频再生

    公开(公告)号：US20160232912A1

    公开(公告)日：2016-08-11

    申请号：US15133410

    申请日：2016-04-20

    Applicant: DOLBY INTERNATIONAL AB

    Inventor： Kristofer KJOERLING ,  Per EKSTRAND ,  Holger HOERICH

    IPC: G10L19/24 ,  G10L19/02 ,  G10L19/093 ,  G10L19/06 ,  G10L19/028

    CPC classification number: G10L19/0208 ,  G10L19/0017 ,  G10L19/0204 ,  G10L19/028 ,  G10L19/06 ,  G10L19/07 ,  G10L19/093 ,  G10L19/167 ,  G10L19/24 ,  G10L19/26 ,  G10L19/265 ,  G10L21/038

    Abstract: A method performed in an audio decoder for reconstructing an original audio signal having a lowband portion and a highband portion is disclosed. The method includes receiving an encoded audio signal and extracting reconstruction parameters from the encoded audio signal. The method further includes decoding the encoded audio signal with a core audio decoder to obtain a decoded lowband portion and regenerating the highband portion based at least in part on a cross over frequency and the decoded lowband portion to obtain a regenerated highband portion. The method also includes creating a synthetic sinusoid with a level based at least in part on a spectral envelope value for the particular subband and a noise floor value for the particular subband and adding the synthetic sinusoid to the regenerated highband portion in the particular frequency band specified by the location information. Finally, the method includes combining the lowband portion and the regenerated highband portion to obtain a full bandwidth audio signal.

    Abstract translation: 公开了一种在用于重构具有低频带部分和高频带部分的原始音频信号的音频解码器中执行的方法。 该方法包括接收经编码的音频信号并从编码的音频信号中提取重建参数。 该方法还包括用核心音频解码器对编码的音频信号进行解码以获得解码的低频带部分，并且至少部分地基于交叉频率和解码的低频带部分来再生高频部分，以获得再生的高频带部分。 该方法还包括至少部分地基于特定子带的频谱包络值和特定子带的噪声本底值创建具有电平的合成正弦波，并将合成正弦波加到指定的特定频带中的再生高频带部分 通过位置信息。 最后，该方法包括组合低频带部分和再生高频部分以获得全带宽音频信号。

    FRAME CONVERSION FOR ADAPTIVE STREAMING ALIGNMENT
    7.
    发明申请
    FRAME CONVERSION FOR ADAPTIVE STREAMING ALIGNMENT 有权

    公开(公告)号：US20220286730A1

    公开(公告)日：2022-09-08

    申请号：US17825995

    申请日：2022-05-26

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION ,  DOLBY INTERNATIONAL AB

    Inventor： Michael Donald HOFFMANN ,  Christof FERSCH ,  Marvin PRIBADI ,  Holger HOERICH

    IPC: H04N21/435 ,  H04N21/2343 ,  H04N21/61

    Abstract: Methods for generating an AV bitstream (e.g., an MPEG-2 transport stream or bitstream segment having adaptive streaming format) such that the AV bitstream includes at least one video I-frame synchronized with at least one audio I-frame, e.g., including by re-authoring at least one video or audio frame (as a re-authored I-frame or a re-authored P-frame). Typically, a segment of content of the AV bitstream which includes the re-authored frame starts with an I-frame and includes at least one subsequent P-frame. Other aspects are methods for adapting such an AV bitstream, audio/video processing units configured to perform any embodiment of the inventive method, and audio/video processing units which include a buffer memory which stores at least one segment of an AV bitstream generated in accordance with any embodiment of the inventive method.

    EFFICIENT DRC PROFILE TRANSMISSION
    10.
    发明申请
    EFFICIENT DRC PROFILE TRANSMISSION 有权

    公开(公告)号：US20210065728A1

    公开(公告)日：2021-03-04

    申请号：US17022152

    申请日：2020-09-16

    Applicant: DOLBY INTERNATIONAL AB

    Inventor： Holger HOERICH ,  Jeroen KOPPENS

    IPC: G10L19/16 ,  H03G7/00 ,  G10L21/0364 ,  G10L19/26 ,  H03G9/00 ,  H04N21/233

    Abstract: A method (600) for decoding an encoded audio signal (102) is described. The encoded audio signal (102) comprises a sequence of frames. Furthermore, the encoded audio signal (102) is indicative of a plurality of different dynamic range control (DRC) profiles for a corresponding plurality of different rendering modes. Different subsets of DRC profiles from the plurality of DRC profiles are comprised within different frames of the sequence of frames, such that two or more frames of the sequence of frames jointly comprise the plurality of DRC profiles. The method (600) comprises determining a first rendering mode from the plurality of different rendering modes; determining (609, 610) one or more DRC profiles from a subset of DRC profiles comprised within a current frame of the sequence of frames; determining (611) whether at least one of the one or more DRC profiles is applicable to the first rendering mode; selecting (604) a default DRC profile as a current DRC profile, if none of the one or more DRC profiles is applicable to the first rendering mode; wherein definition data of the default DRC profile is known at a decoder (100) for decoding the encoded audio signal (102); and decoding the current frame using the current DRC profile.

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