
{"publication_number": "US-9813834-B2", "abstract": "sound scenes in 3d can be synthesized or captured as a natural sound field . for decoding , a decode matrix is required that is specific for a given loudspeaker setup and is generated using the known loudspeaker positions . however , some source directions are attenuated for 2d loudspeaker setups like e . g . 5 . 1 surround . an improved method for decoding an encoded audio signal in soundfield format for l loudspeakers at known positions comprises steps of adding a position of at least one virtual loudspeaker to the positions of the l loudspeakers , generating a 3d decode matrix , wherein the positions of the l loudspeakers and the at least one virtual position are used , downmixing the 3d decode matrix , and decoding the encoded audio signal using the downscaled 3d decode matrix . as a result , a plurality of decoded loudspeaker signals is obtained .", "application_number": "US-201415030066-A", "description": "fig1 shows a flow - chart of a method for decoding an audio signal , in particular a soundfield signal , according to one embodiment . the decoding of soundfield signals generally requires positions of the loudspeakers to which the audio signal shall be rendered . such loudspeaker positions { circumflex over ( \u03c9 )