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    Multi-channel hierarchical audio coding with compact side information
    11.
    发明申请
    Multi-channel hierarchical audio coding with compact side information 有权
    具有紧凑侧面信息的多通道分层音频编码

    公开(公告)号：US20060233380A1

    公开(公告)日：2006-10-19

    申请号：US11314711

    申请日：2005-12-21

    申请人： Andreas Holzer ,  Jurgen Herre ,  Heiko Purnhagen ,  Kristofer Kjorling ,  Jonas Roden ,  Lars Villemoes ,  Jonas Engdegard ,  Jeroen Breebaart ,  Erik Schuijers ,  Werner Oomen

    发明人： Andreas Holzer ,  Jurgen Herre ,  Heiko Purnhagen ,  Kristofer Kjorling ,  Jonas Roden ,  Lars Villemoes ,  Jonas Engdegard ,  Jeroen Breebaart ,  Erik Schuijers ,  Werner Oomen

    IPC分类号： H04R5/00

    CPC分类号： G10L19/008 ,  H04S3/00 ,  H04S2420/03

    摘要： A parametric representation of a multi-channel audio signal describes the spatial properties of the audio signal well with compact side information when a coherence information, describing the coherence between a first and a second channel, is derived within a hierarchical encoding process only for channel pairs including a first channel having only information of a left side with respect to a listening position and including a second channel having only information from a right side with respect to a listening position. As within the hierarchical process the multiple audio channels of the audio signal are downmixed iteratively into monophonic channels, one can pick the relevant parameters from an encoding step involving only channel pairs carrying the information needed to describe the spatial properties of the multi-channel audio signal.

    摘要翻译： 多通道音频信号的参数化表示利用紧凑的侧信息来描述音频信号的空间属性，当描述第一和第二信道之间的相干性的相干信息仅在信道对的分级编码处理中导出时 包括仅具有相对于收听位置的左侧的信息的第一频道，并且包括仅具有相对于收听位置的右侧的信息的第二频道。 如在分层处理中，音频信号的多个音频通道被迭代地下混合成单声道，可以从仅涉及携带描述多声道音频信号的空间属性所需的信息的信道对的编码步骤中选择相关参数 。

    Audio signal synthesis
    13.
    发明申请
    Audio signal synthesis 有权
    音频信号合成

    公开(公告)号：US20070112559A1

    公开(公告)日：2007-05-17

    申请号：US10552772

    申请日：2004-04-14

    申请人： Erik Schuijers ,  Marc Klein Middelink ,  Arnoldus Werner Oomen ,  Leon Van De Kerkhof

    发明人： Erik Schuijers ,  Marc Klein Middelink ,  Arnoldus Werner Oomen ,  Leon Van De Kerkhof

    IPC分类号： G10L19/02

    CPC分类号： H04S3/008 ,  H04S2420/03

    摘要： Synthesizing an output audio signal is provided on the basis of an input audio signal, the input audio signal comprising a plurality of input sub-band signals, wherein at least one input sub-band signal is transformed (T) from the sub-band domain to the frequency domain to obtain at least one respective transformed signal, wherein the at least one input sub-band signal is delayed and transformed (D, T) to obtain at least one respective transformed delayed signal, wherein at least two processed signals are derived from the at least one transformed signal and the at least one transformed delayed signal, wherein the processed signals are inverse transformed (T−1) from the frequency domain to the sub-band domain to obtain respective processed sub-band signals, and wherein the output audio signal is synthesized from the processed sub-band signals.

    摘要翻译： 基于输入音频信号提供输出音频信号的合成，所述输入音频信号包括多个输入子带信号，其中至少一个输入子带信号从子带域变换（T） 到所述频域以获得至少一个相应的变换信号，其中所述至少一个输入子带信号被延迟和变换（D，T）以获得至少一个相应的变换延迟信号，其中导出至少两个处理的信号 从所述至少一个变换信号和所述至少一个经变换的延迟信号，其中所述经处理的信号从所述频域到所述子带域被逆变换（T SUP），以获得相应的处理子 带信号，并且其中从所处理的子带信号合成输出音频信号。