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    SIGNAL GENERATION FOR BINAURAL SIGNALS
    6.
    发明公开
    SIGNAL GENERATION FOR BINAURAL SIGNALS 有权
    信号生成双耳SIGNALS

    公开(公告)号：EP2304975A2

    公开(公告)日：2011-04-06

    申请号：EP09777567.0

    申请日：2009-07-30

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

    发明人： MUNDT, Harald ,  NEUGEBAUER, Bernhard ,  HILPERT, Johannes ,  SILZLE, Andreas ,  PLOGSTIES, Jan

    IPC分类号： H04S3/00 ,  H04S7/00 ,  G10K15/12

    CPC分类号： H04S3/004 ,  H04S7/30 ,  H04S2400/01 ,  H04S2420/01

    摘要： A device for generating a binaural signal based on a multi-channel signal representing a plurality of channels and intended for reproduction by a speaker configuration having a virtual sound source position associated to each channel, is described. It comprises a correlation reducer for differently processing, and thereby reducing a correlation between, at least one of a left and a right channel of the plurality of channels, a front and a rear channel of the plurality of channels, and a center and a non-center channel of the plurality of channels, in order to obtain an inter-similarity reduced set of channels; a plurality of directional filters, a first mixer for mixing outputs of the directional filters modeling the acoustic transmission to the first ear canal of the listener, and a second mixer for mixing outputs of the directional filters modeling the acoustic transmission to the second ear canal of the listener. According to another aspect, a center level reduction for forming the downmix for a room processor is performed. According to even another aspect, an inter-similarity decreasing set of head-related transfer functions is formed.

    METHOD FOR PROCESSING AN AUDIO SIGNAL IN ACCORDANCE WITH A ROOM IMPULSE RESPONSE, SIGNAL PROCESSING UNIT, AUDIO ENCODER, AUDIO DECODER, AND BINAURAL RENDERER
    8.
    发明公开
    METHOD FOR PROCESSING AN AUDIO SIGNAL IN ACCORDANCE WITH A ROOM IMPULSE RESPONSE, SIGNAL PROCESSING UNIT, AUDIO ENCODER, AUDIO DECODER, AND BINAURAL RENDERER 审中-公开

    公开(公告)号：EP4125087A1

    公开(公告)日：2023-02-01

    申请号：EP22195597.4

    申请日：2014-07-16

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

    发明人： NEUKAM, Simone ,  PLOGSTIES, Jan

    IPC分类号： G10K15/12 ,  G01H7/00 ,  H04S7/00 ,  H04S3/00

    摘要： A method for processing an audio signal (400) in accordance with a room impulse response is described. The method includes separately processing the audio signal (400) with an early part and a late reverberation of the room impulse response, wherein the separate processing includes processing the audio signal (400) with the early part of the room impulse response during a first (422) process, processing the audio signal (400) with the late reverberation of the room impulse response or with the synthetic reverberation during a second process (424) that is different and separate from the first process (422), and changing from the first process (422) to the second process (424) at a transition from the early part to the late reverberation in the room impulse response. The method further includes combining (432) the audio signal (428) processed with the early part of the room impulse response and the audio signal (430) processed with the late reverberation of the room impulse response or with the synthetic reverberation. The transition from the early part to the late reverberation in the room impulse response is a time when a correlation measure reaches a threshold. The correlation measure describes with regard to the room impulse response a similarity of a decay in acoustic energy comprising an initial state and of the decay in acoustic energy starting at a point in time, said point in time following the initial state over a predefined frequency range. The threshold is set dependent on the correlation measure for said point in time, said point in time being a time of a selected one of the early reflections in the early part (301, 302) of the room impulse response, and the selected one of the early reflections is the first reflection.