APPARATUS, METHOD AND COMPUTER PROGRAM FOR UPMIXING A DOWNMIX AUDIO SIGNAL USING A PHASE VALUE SMOOTHING
    1.
    发明申请
    APPARATUS, METHOD AND COMPUTER PROGRAM FOR UPMIXING A DOWNMIX AUDIO SIGNAL USING A PHASE VALUE SMOOTHING 有权
    装置,方法和计算机程序,用于使用相位值平滑来降低下降音频信号

    公开(公告)号:US20110255714A1

    公开(公告)日:2011-10-20

    申请号:US13151412

    申请日:2011-06-02

    IPC分类号: H04B1/00

    CPC分类号: G10L19/008 H04S2420/03

    摘要: An apparatus for upmixing a downmix audio signal describing one or more downmix audio channels into an upmixed audio signal describing a plurality of upmixed audio channels includes an upmixer and a parameter determinator. The upmixer is configured to apply temporally variable upmix parameters to upmix the downmix audio signal in order to obtain the upmixed audio signal, wherein the temporally variable upmix parameters include temporally variable smoothened phase values. The parameter determinator is configured to obtain one or more temporally smoothened upmix parameters for usage by the upmixer on the basis of a quantized upmix parameter input information. The parameter determinator is configured to combine a scaled version of a previous smoothened phase value with a scaled version of an input phase information using a phase change limitation algorithm, to determine a current smoothened phase value on the basis of the previous smoothened phase value and the phase input information.

    摘要翻译: 用于将描述一个或多个下混音频通道的下混音频信号上混合到描述多个上混音频通道的上混音频信号中的装置包括上混音器和参数确定器。 上混频器被配置为应用时间上可变的上混参数来上混合音频信号,以便获得上混合音频信号,其中时间上可变上混参数包括时间上可变的平滑相位值。 参数确定器被配置为获得一个或多个时间上平滑的上混参数,以供上混合器基于量化上混参数输入信息使用。 参数确定器被配置为使用相变限制算法将先前平滑相位值的缩放版本与输入相位信息的缩放版本组合,以基于先前平滑相位值确定当前平滑相位值,并且 相输入信息。

    APPARATUS, METHOD AND COMPUTER PROGRAM FOR UPMIXING A DOWNMIX AUDIO SIGNAL
    2.
    发明申请
    APPARATUS, METHOD AND COMPUTER PROGRAM FOR UPMIXING A DOWNMIX AUDIO SIGNAL 有权
    装置,方法和计算机程序,用于提升下载音频信号

    公开(公告)号:US20110317842A1

    公开(公告)日:2011-12-29

    申请号:US13189621

    申请日:2011-07-25

    IPC分类号: H04R5/00

    CPC分类号: G10L19/008

    摘要: An apparatus for upmixing a downmix audio signal describing one or more downmix audio channels into an upmixed audio signal describing a plurality of upmixed audio channels includes an upmixer configured to apply temporally variable upmixing parameters to upmix the downmix audio signal in order to obtain the upmixed audio signal. The apparatus also includes a parameter interpolator, wherein the parameter interpolator is configured to obtain one or more temporally interpolated upmix parameters to be used by the upmixer on the basis of a first complex-valued upmix parameter and a subsequent second complex-valued upmix parameter. The parameter interpolator is configured to separately interpolate between a magnitude value of the first complex-valued upmix parameter and a magnitude value of the second complex-valued upmix parameter, and between a phase value of the first complex-valued upmix parameter and a phase value of the second complex-valued upmix parameter, to obtain the one or more temporally interpolated upmix parameters. A respective method can be implemented, for example, as a computer program.

    摘要翻译: 用于将描述一个或多个下混音频通道的缩混音频信号上混合到描述多个上混合音频通道的上混合音频信号中的装置包括:上混频器,其被配置为应用时间上可变的上混参数来混合下混音频信号,以获得上混合音频 信号。 该装置还包括参数内插器,其中参数内插器被配置为基于第一复值上混参数和随后的第二复值上混参数来获得上混合器使用的一个或多个时间插值上混参数。 参数内插器被配置为在第一复值上混参数的幅度值和第二复值上混参数的幅值之间以及在第一复值上混参数的相位值和相位值之间分别插值 的第二复值上混参数,以获得一个或多个时间内插的上混参数。 相应的方法可以例如作为计算机程序来实现。