METHOD AND APPARATUS FOR LAYOUT AND FORMAT INDEPENDENT 3D AUDIO REPRODUCTION
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Abstract
A method for encoding audio signals, for later reproduction in arbitrary three-dimensional loudspeaker layouts, based on the generation of an intermediate channel-independent representation, which enables the creation, manipulation and reproduction of sounds with complex apparent size and shape, including multiple disconnected shapes.
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Citations
43 Claims
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1-25. -25. (canceled)
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26. A device for encoding an input audio signal into a channel-independent representation comprising a multichannel output audio signal for reproduction over a multiple loudspeaker system, the device comprising:
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a receiver that receives the input audio signal comprising a plurality of individual channels, N; an interface that defines a space D covering a target audience and for partitioning the space D into a plurality of portions k independent from the plurality of channels N; a processor that generates at least one spatial presence factor m for each combination of an input audio channel and portion k, wherein each factor m quantifies a degree of presence of each input audio signal into each portion k of space D; and a processor that maps the input audio signal to the output audio signal, for reproduction within the portions k, based on the value assigned to each spatial presence factor m. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A method of encoding an input audio signal into a channel-independent representation comprising an output audio signal suitable for reproduction over a multiple loudspeaker system, the method comprising:
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receiving the input audio signal comprising a plurality of individual channels, N; defining a space D covering a target audience and partitioning the space D into a plurality of portions k independent from the plurality of channels N; generating at least one spatial presence factor m for each combination of input audio and portion k, wherein each factor m quantifies a degree of presence of each input audio signal into each portion k of space D; and mapping the input audio signal to the output audio signal, for reproduction within the portions k, based on the value assigned to each spatial presence factor m. - View Dependent Claims (39, 40)
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41. A method of decoding a multichannel output signal for reproduction over a multiple loudspeaker system, the method comprising:
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receiving the output signal comprising an N channel signal comprising individual channels for transmission to respective speakers of the multiple loudspeaker system for reproduction over a plurality of portions k of a space D covering a target audience; extracting, from metadata encoded in the output signal, the metadata comprising at least one spatial presence factor m describing the space D and the plurality of portions k; and reproducing the output audio signal over the multiple speaker system. - View Dependent Claims (42, 43)
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Specification