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1. (WO2019027613) INCOHERENT IDEMPOTENT AMBISONICS RENDERING
PCT Biblio. Data
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Pub. No.:
WO/2019/027613
International Application No.:
PCT/US2018/040720
Publication Date:
07.02.2019
International Filing Date:
03.07.2018
IPC:
H04S 3/02
(2006.01) ,
G10L 19/008
(2013.01)
H
ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
S
STEREOPHONIC SYSTEMS
3
Systems employing more than two channels, e.g. quadraphonic
02
of the matrix type, i.e. in which input signals are combined algebraically, e.g. after having been phase shifted with respect to each other
G
PHYSICS
10
MUSICAL INSTRUMENTS; ACOUSTICS
L
SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19
Speech or audio signal analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
04
using predictive techniques
08
Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
Applicants:
GOOGLE LLC
[US/US]; 1600 Amphitheatre Parkway Mountain View, California 94043, US
Inventors:
KLEIJN, Willem Bastiaan
; US
ALLEN, Andrew
; US
SKOGLUND, Jan
; US
LIM, Sze Chie
; US
Agent:
BELLERMANN, Mark R.W.
; US
BENNETT, Daniel M.
; US
BRAKE, R. Edward
; US
FORD, Timothy D.
; US
HUGHES, William G.
; US
KEY, Joseph F.
; US
GROVER, Melanie
; US
Priority Data:
15/666,220
01.08.2017
US
Title
(EN)
INCOHERENT IDEMPOTENT AMBISONICS RENDERING
(FR)
RENDU AMPIOPHONIQUE IDEMPOTENT INCOHÉRENT
Abstract:
(EN)
Techniques of rendering sound for a listener involve producing, as the amplitude of each of the source driving signals, a sum of two terms: a first term based on a solution s
†
to the equation b = A • s, and a second term based on a projection of a specified vector ŝ onto the nullspace of A, ŝ not being a solution to the equation b = A • s Along these lines, in one example, the first term is equivalent to a Moore- Penrose pseudoinverse, e.g., A
H
(AA
H
)
-1
•
b. In general, any solution to the equation b = A • s is satisfactory. The specified vector that is projected onto the nullspace of A is defined to reduce the coherence of the net sound field. Advantageously, the resulting operator is both linear time-invariant and idempotent so that the sound field may be faithfully reproduce both inside the RSF and at a sufficient range outside the RSF to cover a human head.
(FR)
L'invention concerne des techniques de rendu du son destinées à un auditeur qui consistent à produire, en amplitude de chacun des signaux de commande source, une somme de deux termes : un premier terme basé sur une solution s
†
à l'équation b = A • s, et un second terme basé sur la projection d'un vecteur spécifié ŝ sur l'espace nul de A, ŝ n'étant pas une solution de l'équation b = A • s. Sur ces lignes, dans un exemple, le premier terme est équivalent à une pseudo-inverse de Moore-Penrose, par exemple, A
H
(AA
H
)
-1
•
b. En général, toute solution à l'équation b = A • s est satisfaisante. Le vecteur spécifié qui est projeté sur l'espace libre d'A est défini pour réduire la cohérence du champ sonore net. De manière avantageuse, l'opérateur résultant est à la fois linéaire et invariant dans le temps, de sorte que le champ sonore puisse être fidèlement reproduit à la fois à l'intérieur du RSF et à une portée suffisante à l'extérieur du RSF pour couvrir une tête humaine.
Designated States:
AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language:
English (
EN
)
Filing Language:
English (
EN
)