Invention Grant
- Patent Title: Audio decoding of multi-audio-object signal using upmixing
- Patent Title (中): 使用上混音多声道对象信号的音频解码
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Application No.: US12253442Application Date: 2008-10-17
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Publication No.: US08155971B2Publication Date: 2012-04-10
- Inventor: Oliver Hellmuth , Johannes Hilpert , Leonid Terentiev , Cornelia Falch , Andreas Hoelzer , Juergen Herre
- Applicant: Oliver Hellmuth , Johannes Hilpert , Leonid Terentiev , Cornelia Falch , Andreas Hoelzer , Juergen Herre
- Applicant Address: DE Munich
- Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung e.V.
- Current Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung e.V.
- Current Assignee Address: DE Munich
- Agency: Keating & Bennett, LLP
- Main IPC: G10L19/00
- IPC: G10L19/00

Abstract:
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.
Public/Granted literature
- US20090125313A1 AUDIO CODING USING UPMIX Public/Granted day:2009-05-14
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