METHOD FOR AND APPARATUS FOR DECODING AN AMBISONIC

专利名称：METHOD FOR AND APPARATUS FOR

DECODING AN AMBISONICS AUDIO

SOUNDFIELD REPRESENTATION FOR AUDIOPLAYBACK USING 2D SETUPS

发明人：KEILER, Florian,BOEHM, Johannes申请号：EP14786876.4申请日：20141020公开号：EP3061270B1公开日：20170712

摘要：Sound scenes in 3D can be synthesized or captured as a natural sound field. Fordecoding, a decode matrix is required that is specific for a given loudspeaker setup and isgenerated using the known loudspeaker positions. However, some source directions areattenuated for 2D loudspeaker setups like e.g. 5.1 surround. An improved method fordecoding an encoded audio signal in soundfield format for L loudspeakers at knownpositions comprises steps of adding (10) a position of at least one virtual loudspeaker tothe positions of the L loudspeakers, generating (11) a 3D decode matrix ( D '), whereinthe positions (© 1 ...© L ) of the L loudspeakers and the at least one virtual position © '( L+1 ) are used, downmixing (12) the 3D decode matrix ( D '), and decoding (14) theencoded audio signal (i14) using the downscaled 3D decode matrix (D). As a result, aplurality of decoded loudspeaker signals (q14) is obtained.

申请人：DOLBY INT AB

地址：NL

国籍：NL

代理机构：Dolby International AB Patent Group Europe

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