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    Selective post filter
    3.
    发明公开
    Selective post filter 有权
    选择性后过滤器

    公开(公告)号：EP2757560A1

    公开(公告)日：2014-07-23

    申请号：EP14164773.5

    申请日：2011-06-23

    申请人： Dolby International AB

    发明人： Resch, Barbara ,  Kjoerling, Kristofer ,  Villemoes, Lars

    IPC分类号： G10L19/26 ,  G10L19/107 ,  G10L19/02 ,  G10L19/20

    CPC分类号： G10L19/26 ,  G10L19/02 ,  G10L19/0212 ,  G10L19/032 ,  G10L19/09 ,  G10L19/107 ,  G10L19/12 ,  G10L19/125 ,  G10L19/20 ,  G10L19/22 ,  G10L19/265 ,  G10L21/003 ,  G10L21/007 ,  G10L21/013

    摘要： An audio encoding method is characterized by a decision being made as to whether the device which will decode the resulting bit stream should apply post filtering including attenuation of interharmonic noise. Hence, the decision whether to use the post filter, which is encoded in the bit stream, is taken separately from the decision as to the most suitable coding mode.
    In another aspect, there is provided an audio decoding method with a decoding step followed by a post-filtering step, including an amount of interharmonic noise attenuation determined by a variable gain, and being characterized in a step of setting the gain to zero or near-zero in accordance with post filtering information encoded in the bit stream signal. Such a method is well suited for mixed-origin audio signals by virtue of its capability to deactivate the post filter in dependence of the post filtering information only, hence independently of factors such as the current coding mode.

    摘要翻译： 音频编码方法的特征在于判定将对所得比特流进行解码的设备是否应应用包括间谐波噪声衰减的后滤波。 因此，关于是否使用在比特流中编码的后置滤波器的决定与关于最适合的编码模式的决定分开进行。 另一方面，提供了一种具有解码步骤之后是后置滤波步骤的音频解码方法，包括由可变增益确定的一定量的间谐波噪声衰减，并且其特征在于将增益设置为零或接近 根据在比特流信号中编码的后置滤波信息来调零。 这种方法非常适合于混合起源的音频信号，因为它能够根据仅后滤波信息去激活后置滤波器，因此不依赖于诸如当前编码模式的因素。

    PROCESSING OF AUDIO SIGNALS DURING HIGH FREQUENCY RECONSTRUCTION
    4.
    发明授权
    PROCESSING OF AUDIO SIGNALS DURING HIGH FREQUENCY RECONSTRUCTION 有权

    公开(公告)号：EP2765572B1

    公开(公告)日：2017-08-30

    申请号：EP14164770.1

    申请日：2011-07-14

    申请人： Dolby International AB

    发明人： Kjoerling, Kristofer

    IPC分类号： G10L21/038

    CPC分类号： G10L19/0017 ,  G10L19/0204 ,  G10L21/038

    摘要： The application relates to HFR (High Frequency Reconstruction/Regeneration) of audio signals. In particular, the application relates to a method and system for performing HFR of audio signals having large variations in energy level across the low frequency range which is used to reconstruct the high frequencies of the audio signal. A system configured to generate a plurality of high frequency subband signals covering a high frequency interval from a plurality of low frequency subband signals is described. The system comprises means for receiving the plurality of low frequency subband signals; means for receiving a set of target energies, each target energy covering a different target interval within the high frequency interval and being indicative of the desired energy of one or more high frequency subband signals lying within the target interval; means for generating the plurality of high frequency subband signals from the plurality of low frequency subband signals and from a plurality of spectral gain coefficients associated with the plurality of low frequency subband signals, respectively; and means for adjusting the energy of the plurality of high frequency subband signals using the set of target energies.

    METHODS AND DEVICES FOR JOINT MULTICHANNEL CODING
    6.
    发明公开
    METHODS AND DEVICES FOR JOINT MULTICHANNEL CODING 审中-实审

    公开(公告)号：EP4339944A3

    公开(公告)日：2024-05-29

    申请号：EP23212276.2

    申请日：2014-09-08

    申请人： Dolby International AB

    发明人： Kjoerling, Kristofer ,  Mundt, Harald ,  Purnhagen, Heiko

    IPC分类号： G10L19/008

    CPC分类号： G10L19/008

    摘要： Encoding and decoding devices for encoding the channels of an audio system having at least four channels are disclosed. The decoding device has a first stereo decoding component which subjects a first pair of input channels to a first stereo decoding, and a second stereo decoding component which subjects a second pair of input channels to a second stereo decoding. The results of the first and second stereo decoding components are crosswise coupled to a third and a fourth stereo decoding component which each performs stereo decoding on one channel resulting from the first stereo decoding component, and one channel resulting from the second stereo decoding component.

    METHODS AND DEVICES FOR JOINT MULTICHANNEL CODING
    7.
    发明公开
    METHODS AND DEVICES FOR JOINT MULTICHANNEL CODING 审中-实审

    公开(公告)号：EP4339944A2

    公开(公告)日：2024-03-20

    申请号：EP23212276.2

    申请日：2014-09-08

    申请人： Dolby International AB

    发明人： Kjoerling, Kristofer ,  Mundt, Harald ,  Purnhagen, Heiko

    IPC分类号： G10L19/008

    摘要： Encoding and decoding devices for encoding the channels of an audio system having at least four channels are disclosed. The decoding device has a first stereo decoding component which subjects a first pair of input channels to a first stereo decoding, and a second stereo decoding component which subjects a second pair of input channels to a second stereo decoding. The results of the first and second stereo decoding components are crosswise coupled to a third and a fourth stereo decoding component which each performs stereo decoding on one channel resulting from the first stereo decoding component, and one channel resulting from the second stereo decoding component.

    Processing of an audio data stream based on associated metadata
    8.
    发明公开
    Processing of an audio data stream based on associated metadata 审中-公开
    Verarbeitung eines Audiodatenstroms basierend aufzugehörigenMetadaten

    公开(公告)号：EP2731104A1

    公开(公告)日：2014-05-14

    申请号：EP13192356.7

    申请日：2013-11-11

    申请人： Dolby International AB

    发明人： Roeden, Karl Jonas ,  Kjoerling, Kristofer

    IPC分类号： G10L19/16 ,  H03G7/00 ,  H03G3/30

    CPC分类号： G06F17/3074 ,  G10L19/167 ,  G10L19/173 ,  H03G7/007

    摘要： A transcoding tool for transcoding an audio stream to be played at a playback device is provided. The transcoding tool comprises a receiving section adapted to receive at least one bit stream comprising an audio stream and metadata associated with the audio stream. The transcoding tool further comprises a processing section connected to the receiving section and adapted to create a processed audio stream based on the audio stream and metadata, and a transmitting section connected to the processing section and adapted to transmit the created processed audio stream to the playback device.

    摘要翻译： 提供了用于对在播放装置中播放的音频流进行代码转换的转码工具。 代码转换工具包括适于接收包括音频流和与音频流相关联的元数据的至少一个比特流的接收部分。 代码转换工具还包括连接到接收部分并且适于基于音频流和元数据创建经处理的音频流的处理部分，以及连接到处理部分并适于将创建的经处理的音频流发送到播放的发送部分 设备。