IP Library › Granted Patent US 12,424,229
Granted Patent B2
US 12,424,229 · App. 18/390,897 · Granted Sep 23, 2025

Methods and apparatus for determining for decoding a compressed HOA sound representation

Inventors: Sven Kordon (Wunstorf, DE); Alexander Krueger (Burgdorf, DE)
Assignee: Dolby Laboratories Licensing Corporation
G10L19/008H04S7/30H04S2400/11H04S2420/11
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Quick Facts
Patent No.
US 12,424,229
App. No.
18/390,897
Granted
Sep 23, 2025
Kind
B2
Abstract

When compressing an HOA data frame representation, a gain control ( 15, 151 ) is applied for each channel signal before it is perceptually encoded ( 16 ). The gain values are transferred in a differential manner as side information. However, for starting decoding of such streamed compressed HOA data frame representation absolute gain values are required, which should be coded with a minimum number of bits. For determining such lowest integer number (β e ) of bits the HOA data frame representation (C(k)) is rendered in spatial domain to virtual loudspeaker signals lying on a unit sphere, followed by normalisation of the HOA data frame representation (C(k)). Then the lowest integer number of bits is set to β e = ⌈ log 2 ( ⌈ log 2 ( K M ⁢ A ⁢ X · O ) ⌉ + 1 ) ⌉ .

Claims (25)

1. A method for determining a lowest integer number β e of bits representing non-differential gain values corresponding to amplitude changes for channel signals of Higher Order Ambisonics (HOA) data frames, the method comprising:

determining by a processor the integer number βe of bits based on

β

e

=

⌈

log

2

(

⌈

log

2

(

K

MAX

·

O

)

⌉

+

1

)

⌉

,

wherein K MAX is a constant that is determined based on an ambisonics order, O=(N+1) 2 is a number of HOA coefficient sequences, and N is the ambisonics order.

Priority Claims (1)
EP 14306023 · Jun 27, 2014 · regional
Continuity (5)
Continuation 17733757 · Apr 29, 2022
Continuation 17116900 · Dec 9, 2020
Division 16255358 · Jan 23, 2019
Division 15319699
Related Publication 20240212692A1 · Jun 27, 2024
References Cited (73)
US 5757927A · Gerzon et al. · 1998 [cited by applicant]
US 6664662B2 · Melin · 2003 [cited by applicant]
US 9792924B2 · Krueger · 2017 [cited by examiner]
US 9794713B2 · Kordon · 2017 [cited by applicant]
US 9922657B2 · Krueger · 2018 [cited by examiner]
US 10037764B2 · Krueger · 2018 [cited by examiner]
US 10224044B2 · Krueger · 2019 [cited by examiner]
US 10236003B2 · Kordon · 2019 [cited by applicant]
US 10580426B2 · Krueger · 2020 [cited by examiner]
US 10621995B2 · Kordon · 2020 [cited by examiner]
US 10872612B2 · Kordon · 2020 [cited by examiner]
US 11322165B2 · Kordon · 2022 [cited by examiner]
US 11875803B2 · Kordon · 2024 [cited by examiner]
US 20120155653A1 · Jax et al. · 2012 [cited by applicant]
US 20130216070A1 · Keiler · 2013 [cited by applicant]
US 20140358565A1 · Peters · 2014 [cited by applicant]
US 20150098572A1 · Batke et al. · 2015 [cited by applicant]
US 20150271621A1 · Sen · 2015 [cited by applicant]
US 20150332679A1 · Kruger · 2015 [cited by applicant]
US 20160088415A1 · Krueger et al. · 2016 [cited by applicant]
US 20160150341A1 · Kordon et al. · 2016 [cited by applicant]
US 20160255452A1 · Nowak · 2016 [cited by applicant]
CA 2238026C · 2002 [cited by applicant]
CN 1677492A · 2005 [cited by applicant]
CN 103313182B · 2009 [cited by applicant]
CN 101128866B · 2011 [cited by applicant]
CN 101872618B · 2012 [cited by applicant]
CN 101523733B · 2013 [cited by applicant]
CN 103250207A · 2013 [cited by applicant]
CN 102823277B · 2015 [cited by applicant]
CN 103635964B · 2016 [cited by applicant]
CN 102547549B · 2016 [cited by applicant]
CN 106471822A · 2017 [cited by applicant]
CN 104285390B · 2017 [cited by applicant]
CN 104428833B · 2017 [cited by applicant]
CN 112216292A · 2021 [cited by applicant]
CN 112908349A · 2021 [cited by applicant]
CN 112951254A · 2021 [cited by applicant]
CN 113793618A · 2021 [cited by applicant]
CN 113808598A · 2021 [cited by applicant]
CN 113808599A · 2021 [cited by applicant]
CN 113808600A · 2021 [cited by applicant]
CN 112908348B · 2022 [cited by applicant]
CN 110556120B · 2023 [cited by applicant]
EP 2451196A1 · 2012 [cited by applicant]
EP 2665208A1 · 2013 [cited by applicant]
EP 2743922A1 · 2014 [cited by applicant]
EP 2800401A1 · 2014 [cited by applicant]
EP 2824661A1 · 2015 [cited by applicant]
JP 2012133366A · 2008 [cited by applicant]
JP 6869296B2 · 2021 [cited by applicant]
KR 20170023017A · 2017 [cited by applicant]
KR 20170023866A · 2017 [cited by applicant]
KR 102428370B1 · 2022 [cited by applicant]
RU 2421828C2 · 2011 [cited by applicant]
TW 200915786A · 2009 [cited by applicant]
TW 201412145A · 2014 [cited by applicant]
WO 2009001874A1 · 2008 [cited by applicant]
WO 2013176959A1 · 2013 [cited by applicant]
WO 2013171083A1 · 2013 [cited by applicant]
WO 2014012944A1 · 2014 [cited by applicant]
WO 2014090660A1 · 2014 [cited by applicant]
Fei, X., et al., Discrete Cosine Transform-Based ECG Data Compession By Template, Space Medicine & Medical Engineering, Nov. 20, 2000, Issue: 6, p. 435-439. [cited by applicant]
“ISO/IEC JTC 1/SC 29 N ISO/IEC CD 23008-3, Information Technology—High Efficiency Coding and Media Delivery in Heterogeneous Environments—Part 3: 3D Audio” MPEG Document Ni4459, Apr. 4, 2014. [cited by applicant]
Fliege, Jorg “A Two-Stage Approach for Computing Cubature Formulae for the Sphere” Fachbereich Mathematic Dortmund Germany, 1999, pp. 1-31. [cited by applicant]
Integration Nodes for the Sphere, 2015, http://www.mathematik.uni-dortmund.de/lsx/research/projects/fliege/nodes/nodes.html. [cited by applicant]
ISO/IEC JTC1/SC29/WG11 N14264, “WD1-HOA Text of MPEG-H 3D Audio” Coding of Moving Pictures and Audio, Jan. 2014, pp. 1-86. [cited by applicant]
Jerome Daniel, “Representation de Champs Acoustiques, application a la transmission et a la reproduction de scenes Sonores Complexes dans un Context Multimedia” Jul. 31, 2001. [cited by applicant]
Johannes Boehm, et al “Detailed Technical Description of 3D Audio Phase 2 Reference Model 0 for HOA Technologies” MPEG MEeting Oct. 20, 2014-Oct. 24, 2014. [cited by applicant]
Rafaely, Boaz “Plane Wave Decomposition of the Sound Field on a Sphere by Spherical Convolution” ISVR Technical Memorandum 910, May 2003, pp. 1-40. [cited by applicant]
Sun, H. et al “Optimal Higher Order Ambisonics Encoding with Predefined Constraints” IEEE Transactions on Audio, Speech and Language Processing, vol. 20, Issue 3, Mar. 2012. [cited by applicant]
Williams, Earl, “Fourier Acoustics” Chapter 6 Spherical Waves, pp. 183-186, Jun. 1999. [cited by applicant]
ISO/IEC JTC 1/SC 29, ISO/IEC 23008-3:201x(E), Information Technology—High efficiency coding and media delivery in heterogeneous environments—Part 3: 3D Audio, Oct. 12, 2016, 799 pages. [cited by applicant]