Title:
Methods and devices for compressing and decompressing higher-order ambisonic representations for sound fields
Document Type and Number:
Japanese Patent JP6285458
Kind Code:
B2
Abstract:
The invention improves HOA sound field representation compression. The HOA representation is analysed for the presence of dominant sound sources and their directions are estimated. Then the HOA representation is decomposed into a number of dominant directional signals and a residual component. This residual component is transformed into the discrete spatial domain in order to obtain general plane wave functions at uniform sampling directions, which are predicted from the dominant directional signals. Finally, the prediction error is transformed back to the HOA domain and represents the residual ambient HOA component for which an order reduction is performed, followed by perceptual encoding of the dominant directional signals and the residual component.
Inventors:
Kruger, Alexander
Cordon, Suhuen
Behm, Johannes
Cordon, Suhuen
Behm, Johannes
Application Number:
JP2015546945A
Publication Date:
February 28, 2018
Filing Date:
December 04, 2013
Export Citation:
Assignee:
Dolby International Arb
International Classes:
G10L19/008
Domestic Patent References:
| JP2012133366A |
Foreign References:
| EP2665208A1 | ||||
| US20120155653 |
Attorney, Agent or Firm:
Tadashige Ito
Tadahiko Ito
Shinsuke Onuki
Tadahiko Ito
Shinsuke Onuki
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