Mixed domain coding of audio
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United States of America Patent
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Jan 30, 2018
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app pub date -
Sep 15, 2016
filing date -
Jan 5, 2016
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Abstract
In one example, a method includes obtaining an audio signal comprising a plurality of elements; generating a first Higher-Order Ambisonics (HOA) soundfield that represents the audio signal; selecting a set of elements of the audio signal for encoding in a non-Higher-Order Ambisonics (HOA) domain; generating, based on the selected set of elements and a set of spatial positioning vectors, a second HOA soundfield that represents the selected set of elements; generating a third HOA soundfield that represents a difference between the first HOA soundfield and the second HOA soundfield; and generate a coded audio bitstream that includes a representation of the selected set of elements in the non-HOA domain, an indication of the set of spatial positioning vectors, and a representation of the third HOA soundfield.
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