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    PARAMETER ENCODING AND DECODING
    1.
    发明公开
    PARAMETER ENCODING AND DECODING 审中-实审

    公开(公告)号：EP4398243A2

    公开(公告)日：2024-07-10

    申请号：EP24166906.8

    申请日：2020-06-15

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

    发明人： BOUTHÉON, Alexandre ,  FUCHS, Guillaume ,  MULTRUS, Markus ,  KÜCH, Fabian ,  THIERGART, Oliver ,  BAYER, Stefan ,  DISCH, Sascha ,  HERRE, Jürgen

    IPC分类号： G10L19/008

    CPC分类号： G10L19/008

    摘要： There is disclosed audio synthesizer (300) for generating a synthesis signal (336) from a downmix signal (324, x) having a number of downmix channels, the synthesis signal (336) having a number of synthesis channels, the downmix signal (324, x) being a downmixed version of an original signal (212) having a number of original channels, the audio synthesizer (300) comprising:
    a first path (610c') including:
    a first mixing matrix block (600c) configured for synthesizing a first component (336M') of the synthesis signal according to a first mixing matrix (MM) calculated from:
    a covariance matrix (CYR) associated to the synthesis signal (212); and
    a covariance matrix (Cx) associated to the downmix signal (324),

    a second path (610c) for synthesizing a second component (336R') of the synthesis signal, wherein the second component (336R') is a residual component, the second path (610c) including:
    a prototype signal block (612c) configured for upmixing the downmix signal (324) from the number of downmix channels to the number of synthesis channels;
    a decorrelator (614c) configured for decorrelating the upmixed prototype signal (613c);
    a second mixing matrix block (618c) configured for synthesizing the second component (336R') of the synthesis signal according to a second mixing matrix (MR) from the decorrelated version (615c) of the downmix signal (324), the second mixing matrix (MR) being a residual mixing matrix,

    wherein the audio synthesizer (300) is configured to calculate (618c) the second mixing matrix (MR) from:
    the residual covariance matrix (Cr) provided by the first mixing matrix block(600c); and
    an estimate of the covariance matrix of the decorrelated prototype signals (Cy ) obtained from the covariance matrix (Cx) associated to the downmix signal (324),

    wherein the audio synthesizer (300) further comprises an adder block (620c) for summing the first component (336M') of the synthesis signal with the second component (336R') of the synthesis signal.

    APPARATUS AND METHOD FOR PROCESSING AN INFORMATION SIGNAL USING A MULTI-STAGE PROCESSING
    4.
    发明公开
    APPARATUS AND METHOD FOR PROCESSING AN INFORMATION SIGNAL USING A MULTI-STAGE PROCESSING 审中-公开

    公开(公告)号：EP4439560A1

    公开(公告)日：2024-10-02

    申请号：EP23165199.3

    申请日：2023-03-29

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

    发明人： CHAKRABARTY, Soumitro ,  SHETU, Shrishti Saha ,  MABANDE, Edwin ,  THIERGART, Oliver

    IPC分类号： G10L25/30 ,  G10L21/02 ,  G06N3/045

    CPC分类号： G10L25/30 ,  G06N3/045 ,  G10L25/18 ,  G10L21/034

    摘要： An apparatus for processing an information signal comprises: a feature extractor (100) for extracting a set of features from the information signal, wherein each feature of the set of features comprises at least two feature components, and wherein the set of features comprises a first subset with the first feature components and a second subset with the second feature components; and a neural network processor (300) comprising: a first neural network (340) for receiving, as an input, the first subset and for outputting a processed first subset; a combiner (350) for combining the processed first subset and the second subset to obtain a combined subset; and a second neural network (360) for receiving, as an input, the combined subset and for outputting a processed combined output, wherein the processed combined output represents a processed information signal, or wherein the apparatus is configured to calculate the processed information signal using the processed combined output, and wherein a complexity of the first neural network (340) is greater than a complexity of the second neural network.

    APPARATUS AND METHOD FOR GEOMETRY-BASED SPATIAL AUDIO CODING
    10.
    发明授权
    APPARATUS AND METHOD FOR GEOMETRY-BASED SPATIAL AUDIO CODING 有权
    基于几何的空间音频编码的装置和方法

    公开(公告)号：EP2647005B1

    公开(公告)日：2017-08-16

    申请号：EP11801648.4

    申请日：2011-12-02

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

    发明人： DEL GALDO, Giovanni ,  THIERGART, Oliver ,  HERRE, Jürgen ,  KÜCH, Fabian ,  HABETS, Emanuel ,  CRACIUN, Alexandra ,  KUNTZ, Achim

    IPC分类号： G10L19/02 ,  G10L19/00 ,  H04R1/32 ,  H04R3/00 ,  G10L19/20 ,  G10L19/16 ,  G10L19/008

    CPC分类号： G10L19/00 ,  G10L19/008 ,  G10L19/02 ,  G10L19/167 ,  G10L19/20 ,  H04R1/326 ,  H04R3/005 ,  H04R2430/21

    摘要： An apparatus for generating an audio output signal to simulate a recording of a virtual microphone at a configurable virtual position in an environment includes a sound events position estimator and an information computation module. The former is adapted to estimate a sound source position indicating a position of a sound source in the environment, wherein the sound events position estimator is adapted to estimate the sound source position based on first and second direction information provided by first and second real spatial microphones, respectively, located at first and second real microphone positions in the environment, respectively. The information computation module is adapted to generate the audio output signal based on a first recorded audio input signal, on the first real microphone position, on the virtual position of the virtual microphone, and on the sound source position.

    摘要翻译： 一种用于生成音频输出信号以模拟环境中的可配置虚拟位置处的虚拟麦克风的记录的设备，包括声音事件位置估计器和信息计算模块。 前者适用于估计指示环境中的声源的位置的声源位置，其中声音事件位置估计器适于基于由第一和第二真实空间麦克风提供的第一和第二方向信息来估计声源位置 分别位于环境中的第一和第二真实麦克风位置处。 信息计算模块适用于基于第一记录音频输入信号，第一真实麦克风位置，虚拟麦克风的虚拟位置和声源位置生成音频输出信号。