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    • 6. 发明授权
    • Methods and apparatus for characterizing media
    • 表征媒体的方法和装置
    • US08457972B2
    • 2013-06-04
    • US13619023
    • 2012-09-14
    • Alexander TopchyVenugopal SrinivasanArun Ramaswamy
    • Alexander TopchyVenugopal SrinivasanArun Ramaswamy
    • G10L21/00H04H60/32
    • H04H60/58H04H20/14
    • Methods and apparatus for characterizing media are described. A disclosed example apparatus includes a transformer, a decision metric processor, a signature determiner, and a processor to implement the transformer, the decision metric processor, and/or the signature determiner. The example transformer is to convert at least a portion of a block of audio into a frequency domain representation including a plurality of frequency components. The example decision metric processor is to: define a band of the frequency components; determine a difference in energy between a first convolution of a first complex vector with a first group of frequency bins in the band and a second convolution of a second complex vector with a second group of frequency bins in the band; and determine a decision metric for the band based on the difference. The example signature determiner is to determine a signature based on a value of the decision metric.
    • 描述用于表征介质的方法和装置。 所公开的示例性设备包括变压器,决策度量处理器,签名确定器和用于实现变压器的处理器,决策度量处理器和/或签名确定器。 示例性变压器是将音频块的至少一部分转换为包括多个频率分量的频域表示。 示例决策度量处理器是:定义频率分量的频带; 确定第一复矢量与频带中的第一组频率仓的第一卷积之间的能量差和第二复矢量与频带中的第二组频率仓的第二卷积; 并且基于该差异来确定所述频带的决策度量。 示例性签名确定器是基于决策度量的值来确定签名。
    • 8. 发明申请
    • METHODS AND APPRATUS FOR CHARACTERIZING MEDIA
    • 用于表征媒体的方法和装置
    • US20120071995A1
    • 2012-03-22
    • US13250663
    • 2011-09-30
    • Alexander TopchyVenugopal SrinivasanArun Ramaswamy
    • Alexander TopchyVenugopal SrinivasanArun Ramaswamy
    • G06F17/00
    • H04H60/58H04H20/14
    • Methods and apparatus for characterizing media are described. An example apparatus includes a transformer to convert at least a portion of a block of audio into a frequency domain representation including a plurality of frequency components; a decision metric processor to: define a band of frequency components having real and imaginary spectral components, define a plurality of frequency bins within the band, determine respective difference functions for each of the frequency bins using a product of the real and imaginary spectral components of a corresponding group of the frequency bins, the corresponding group for a first one of the frequency bins including at least the first one of the frequency bins and a second one of the frequency bins selected based on the first frequency bin, and determine a decision metric by summing the difference functions; and a signature determiner to determine a signature based on the decision metric.
    • 描述用于表征介质的方法和装置。 示例性装置包括:变换器,用于将音频块的至少一部分转换成包括多个频率分量的频域表示; 决策度量处理器,用于:定义具有实数和虚数谱分量的频率分量的频带,在所述频带内定义多个频率仓,使用所述频域的实数和虚谱分量的乘积确定每个所述频率仓的相应差函数, 相应的频率仓组,用于包括频率仓中的至少第一频率仓的第一个频率仓的相应组,以及基于第一频率仓选择的频率仓中的第二个,并且确定一个决定度量 通过总结差异函数; 以及签名确定器,用于基于所述决策度量来确定签名。
    • 10. 发明申请
    • METHODS AND APPARATUS FOR CHARACTERIZING MEDIA
    • 表征媒体的方法和装置
    • US20130013324A1
    • 2013-01-10
    • US13619023
    • 2012-09-14
    • Alexander TopchyVenugopal SrinivasanArun Ramaswamy
    • Alexander TopchyVenugopal SrinivasanArun Ramaswamy
    • G10L19/00
    • H04H60/58H04H20/14
    • Methods and apparatus for characterizing media are described. A disclosed example apparatus includes a transformer, a decision metric processor, a signature determiner, and a processor to implement the transformer, the decision metric processor, and/or the signature determiner. The example transformer is to convert at least a portion of a block of audio into a frequency domain representation including a plurality of frequency components. The example decision metric processor is to: define a band of the frequency components; determine a difference in energy between a first convolution of a first complex vector with a first group of frequency bins in the band and a second convolution of a second complex vector with a second group of frequency bins in the band; and determine a decision metric for the band based on the difference. The example signature determiner is to determine a signature based on a value of the decision metric.
    • 描述用于表征介质的方法和装置。 所公开的示例性设备包括变压器,决策度量处理器,签名确定器和用于实现变压器的处理器,决策度量处理器和/或签名确定器。 示例性变压器是将音频块的至少一部分转换为包括多个频率分量的频域表示。 示例决策度量处理器是:定义频率分量的频带; 确定第一复矢量与频带中的第一组频率仓的第一卷积之间的能量差和第二复矢量与频带中的第二组频率仓的第二卷积; 并且基于该差异来确定所述频带的决策度量。 示例性签名确定器是基于决策度量的值来确定签名。