Title:
A method and a device which encode and decode a series of frames of the Ambi Sonics expression of two dimensions or a three-dimensional acoustic field
Document Type and Number:
Japanese Patent JP6022157
Kind Code:
B2
Abstract:
Representations of spatial audio scenes using higher-order Ambisonics (HOA) technology typically require a large number of coefficients per time instant. This data rate is too high for most practical applications that require real-time transmission of audio signals. According to the invention, the compression is carried out in spatial domain instead of HOA domain. The (N+1)2 input HOA coefficients are transformed into (N+1)2 equivalent signals in spatial domain, and the resulting (N+1)2 time-domain signals are input to a bank of parallel perceptual codecs. At decoder side, the individual spatial-domain signals are decoded, and the spatial-domain coefficients are transformed back into HOA domain in order to recover the original HOA representation.
Inventors:
Peter jacks
Johann-Marx Butke
Johannes Böhm
Sven Cordon
Johann-Marx Butke
Johannes Böhm
Sven Cordon
Application Number:
JP2011278172A
Publication Date:
November 09, 2016
Filing Date:
December 20, 2011
Export Citation:
Assignee:
Dolby International Arb
International Classes:
G10L19/008; G10L19/00; H04S3/00
Domestic Patent References:
| JP2009518934A |
Foreign References:
| US20100198585 | ||||
| WO2006052188A1 | ||||
| US6678647 |
Attorney, Agent or Firm:
Tadashige Ito
Tadahiko Ito
Shinsuke Onuki
Tadahiko Ito
Shinsuke Onuki