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    AUDIO CODING WITH RANGE EXTENSION
    41.
    发明申请
    AUDIO CODING WITH RANGE EXTENSION 审中-公开

    公开(公告)号：US20180130480A1

    公开(公告)日：2018-05-10

    申请号：US15563936

    申请日：2016-04-01

    Applicant: Dolby International AB

    Inventor： Heiko PURNHAGEN ,  Per EKSTRAND ,  Harald MUNDT ,  Klaus PEICHL

    IPC: G10L19/035 ,  G10L19/02

    CPC classification number: G10L19/035 ,  G10L19/0204 ,  G10L21/0316 ,  G10L2019/0002 ,  G10L2019/0004

    Abstract: Disclosed are some examples of systems, apparatus, methods and computer program products implementing techniques for extending the range of a set of decoded parameter values for a sequence of frequency bands in an identifiable time frame of an audio signal. In some implementations, the parameter values vary in relation to a sequence of time frames of the audio signal and in relation to a sequence of frequency bands in each time frame. In some implementations, it is determined that a decoded value corresponds to a minimum of a first range of values of a first coding protocol of a set of coding protocols. The determined value is modified to be below the minimum of the first range of values to produce an extended value. A modified set of decoded values including one or more extended values can thus be provided.

    Enabling Sampling Rate Diversity In A Voice Communication System
    42.
    发明申请
    Enabling Sampling Rate Diversity In A Voice Communication System 审中-公开

    公开(公告)号：US20180130479A1

    公开(公告)日：2018-05-10

    申请号：US15867318

    申请日：2018-01-10

    Applicant: DOLBY INTERNATIONAL AB

    Inventor： Heiko PURNHAGEN ,  Leif SEHLSTROM ,  Lars VILLEMOES ,  Glenn N. DICKINS ,  Mark S. VINTON

    IPC: G10L19/03 ,  G10L19/26 ,  H04M3/56 ,  G10L19/16 ,  G10L19/002

    CPC classification number: G10L19/03 ,  G10L19/002 ,  G10L19/16 ,  G10L19/26 ,  H04M3/56 ,  H04M3/568

    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 moving 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 neighbourhood 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.

    EFFICIENT CODING OF AUDIO SCENES COMPRISING AUDIO OBJECTS
    47.
    发明申请
    EFFICIENT CODING OF AUDIO SCENES COMPRISING AUDIO OBJECTS 有权

    公开(公告)号：US20170180905A1

    公开(公告)日：2017-06-22

    申请号：US15300159

    申请日：2015-03-31

    Applicant: DOLBY INTERNATIONAL AB

    Inventor： Heiko PURNHAGEN ,  Janusz KLEJSA

    IPC: H04S7/00 ,  G10L19/008 ,  H04S3/00

    CPC classification number: H04S7/302 ,  G10L19/008 ,  H04S3/008 ,  H04S2400/01 ,  H04S2400/03 ,  H04S2400/11

    Abstract: There is provided encoding and decoding methods for encoding and decoding of object based audio. An exemplary decoding method described is for reconstructing audio objects based on a data stream, wherein the data stream corresponds to a plurality of time frames, wherein the data stream comprises a plurality of side information instances, wherein the data stream further comprises, for each side information instance, transition data including two independently assignable portions which in combination define a point in time to begin a transition from a current reconstruction setting to a desired reconstruction setting specified by the side information instance, and a point in time to complete the transition.

    EXPLOITING METADATA REDUNDANCY IN IMMERSIVE AUDIO METADATA
    50.
    发明申请
    EXPLOITING METADATA REDUNDANCY IN IMMERSIVE AUDIO METADATA 有权
    在无与伦比的音频元素中实现元数据冗余

    公开(公告)号：US20170013387A1

    公开(公告)日：2017-01-12

    申请号：US15114383

    申请日：2015-04-01

    Applicant: Dolby International AB

    Inventor： Christof FERSCH ,  Heiko PURNHAGEN ,  Jens POPP ,  Martin WOLTERS

    IPC: H04S7/00 ,  H04S3/00 ,  G10L19/008

    CPC classification number: H04S7/30 ,  G10L19/008 ,  H04S3/008 ,  H04S2400/03 ,  H04S2400/11 ,  H04S2400/13

    Abstract: The present document relates to the field of encoding and decoding of audio. In particular, the present document relates to encoding and decoding of an audio scene comprising audio objects. A method (400) for encoding metadata relating to plurality of audio objects (106a) of an audio scene (102) is described. The metadata comprises a first set (114, 314) of metadata and a second set (104) of metadata. The first and second sets (104, 114, 314) of metadata comprise one or more data elements which are indicative of a property of an audio object (106a) from the plurality of audio objects (106a) and/or of a downmix signal (112) derived from the plurality of audio objects (106a). The method (400) comprises identifying (401) a redundant data element which is common to the first and second sets (104, 114, 314) of metadata. Furthermore, the method comprises encoding (402) the redundant data element of the first set (114, 314) of metadata by referring to a redundant data element of a set (104) of metadata external for the first set (114, 314) of metadata.

    Abstract translation: 本文件涉及音频的编码和解码领域。 特别地，本文件涉及包括音频对象的音频场景的编码和解码。 描述了用于编码与音频场景（102）的多个音频对象（106a）有关的元数据的方法（400）。 元数据包括元数据的第一集合（114,314）和元数据的第二集合（104）。 元数据的第一和第二组（104,114,314）包括指示来自多个音频对象（106a）和/或降混信号（106a）的音频对象（106a）的属性的一个或多个数据元素 112）从多个音频对象（106a）导出。 方法（400）包括识别（401）元数据的第一和第二组（104,114,314）共有的冗余数据元素。 此外，该方法包括通过参考第一组（114,314）的外部元数据（104）的冗余数据元素（104）来编码（402）元数据的第一组（114,314）的冗余数据元素 元数据。

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