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    • 10. 发明授权
    • Audio decoding of multi-audio-object signal using upmixing
    • 使用上混音多声道对象信号的音频解码
    • US08155971B2
    • 2012-04-10
    • US12253442
    • 2008-10-17
    • Oliver HellmuthJohannes HilpertLeonid TerentievCornelia FalchAndreas HoelzerJuergen Herre
    • Oliver HellmuthJohannes HilpertLeonid TerentievCornelia FalchAndreas HoelzerJuergen Herre
    • G10L19/00
    • G10L19/04G10L19/008G10L19/20H04S3/002H04S2420/03H04S2420/07
    • A method for decoding a multi-audio-object signal having audio signals of first and second types encoded therein, the multi-audio-object signal having a downmix signal and side information having level information of the audio signals of the first and second types in a first predetermined time/frequency resolution, the method including computing a prediction coefficient matrix C based on the level information; and up-mixing the downmix signal based on the prediction coefficients to obtain a first and/or a second up-mix audio signal approximating the audio signals of the first and second types, respectively, wherein up-mixing yields the first and/or second up-mix signals S1 and S2 from the downmix signal d according to a computation representable by ( S 1 S 2 ) = D - 1 ⁢ { ( 1 C ) ⁢ d + H } , with “1” denoting—depending on the number of channels of d—a scalar, or an identity matrix, and D−1 being a matrix uniquely determined by a downmix prescription according to which the audio signals of the first and second types are downmixed into the downmix signal, and which is also included by the side information, and H being a term independent from d.
    • 一种对其中编码有第一和第二类型的音频信号的多音频对象信号进行解码的方法,具有降混信号的多音频对象信号和具有第一和第二类型的音频信号的电平信息的侧信息 第一预定时间/频率分辨率,所述方法包括基于所述电平信息来计算预测系数矩阵C; 以及基于所述预测系数对所述下混合信号进行加混,以获得分别接近所述第一类型和第二类型的音频信号的第一和/或第二混合音频信号,其中上混合产生所述第一和/ 根据由(S 1 S 2)= D-1 {(1 C)d + H)表示的计算,来自下混合信号d的混合信号S1和S2,其中“1”表示取决于数字 的d-a标量或单位矩阵的信道,D-1是由缩混处方唯一确定的矩阵,根据该处理,第一和第二类型的音频信号被混合到下混合信号中,并且还包括 通过侧面信息,H是独立于d的术语。