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    PARTITIONED BLOCK FREQUENCY DOMAIN ADAPTIVE FILTER DEVICE COMPRISING ADAPTATION MODULES AND CORRECTION MODULES
    3.
    发明公开
    PARTITIONED BLOCK FREQUENCY DOMAIN ADAPTIVE FILTER DEVICE COMPRISING ADAPTATION MODULES AND CORRECTION MODULES 审中-公开

    公开(公告)号：EP3329594A1

    公开(公告)日：2018-06-06

    申请号：EP16745677.1

    申请日：2016-07-25

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

    发明人： LUIS VALERO, Maria ,  HABETS, Emanuel ,  MABANDE, Edwin ,  LOMBARD, Anthony ,  MAHNE, Dirk ,  BIRZER, Bernhard

    IPC分类号： H03H21/00

    CPC分类号： H03H21/0067 ,  H03H21/0027 ,  H03H21/0043 ,  H03H2021/0058

    摘要： Partitioned block frequency domain adaptive filter device comprising: a frequency domain adaptive filter configured for filtering a frequency domain representation of a time domain input signal depending on a set of filter coefficients consisting of a plurality of blocks of filter coefficients in order to produce a filtered signal; a plurality of parallel arranged filter update blocks, each of the filter update blocks being configured for updating one of the blocks of filter coefficients based on an update signal gathered by a circular correlation of a block of the frequency domain representation signal and a frequency domain control signal comprising a representation of the filtered signal; wherein each of the filter update blocks comprises an adaptation module configured for executing an adaptation sequence comprising the steps of calculating an approximation of a constrained gradient update for the filter coefficients of the respective block of filter coefficients by applying an approximated constraining matrix having a lesser complexity than a constraining matrix to an unconstrained gradient update for the filter coefficients of the respective block of filter coefficients, wherein the unconstrained gradient update is derived from the update signal, and calculating a cumulative error introduced on the unconstrained gradient update by applying the approximated constraining matrix to the unconstrained gradient update; wherein each of the filter update blocks comprises a correction module configured for executing a correction sequence comprising the steps of calculating a corrected constrained gradient update for the filter coefficients of the respective block of filter coefficients by applying the frequency domain constraining matrix to a sum of the approximation of the constrained gradient update and the cumulative error.

    NOISE GENERATION IN AUDIO CODECS
    7.
    发明公开
    NOISE GENERATION IN AUDIO CODECS 有权
    噪音的产生IN音频编解码器

    公开(公告)号：EP2676262A2

    公开(公告)日：2013-12-25

    申请号：EP12703807.3

    申请日：2012-02-14

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

    发明人： SETIAWAN, Panji ,  WILDE, Stephan ,  LOMBARD, Anthony ,  DIETZ, Martin

    IPC分类号： G10L19/00

    CPC分类号： G10L19/00 ,  G10K11/16 ,  G10L19/005 ,  G10L19/012 ,  G10L19/0212 ,  G10L19/025 ,  G10L19/03 ,  G10L19/04 ,  G10L19/107 ,  G10L19/12 ,  G10L19/22 ,  G10L19/26 ,  G10L21/0216 ,  G10L25/06 ,  G10L25/78

    摘要： An apparatus for decoding an encoded audio signal, wherein one or more tracks are associated with the encoded audio signal, each one of the tracks having a plurality of track positions and a plurality of pulses is provided. The apparatus comprises a pulse information decoder (110) and a signal decoder (120). The pulse information decoder (110) is adapted to decode a plurality of pulse positions, wherein each one of the pulse positions indicates one of the track positions of one of the tracks to indicate a position of one of the pulses of the track, and wherein the pulse information decoder is configured to decode the plurality of pulse positions by using a track positions number indicating a total number of the track positions of at least one of the tracks, a total pulses number indicating a total number of the pulses of at least one of the tracks, and one state number. The signal decoder (120) is adapted to decode the encoded audio signal by generating a synthesized audio signal using the plurality of pulse positions and a plurality of predictive filter coefficients being associated with the encoded audio signal.