US 12,432,519 B2
Audio apparatus and method therefor
Jeroen Gerardus Henricus Koppens, Nederweert (NL); Sam Martin Jelfs, Valkenswaard (NL); and Patrick Kechichian, Eindhoven (NL)
Assigned to Koninklijke Philips N.V., Eindhoven (NL)
Appl. No. 18/285,900
Filed by KONINKLIJKE PHILIPS N.V., Eindhoven (NL)
PCT Filed Mar. 10, 2022, PCT No. PCT/EP2022/056218
§ 371(c)(1), (2) Date Oct. 6, 2023,
PCT Pub. No. WO2022/214270, PCT Pub. Date Oct. 13, 2022.
Claims priority of application No. 21167510 (EP), filed on Apr. 8, 2021.
Prior Publication US 2024/0244391 A1, Jul. 18, 2024
Int. Cl. H04S 7/00 (2006.01)
CPC H04S 7/306 (2013.01) [H04S 7/302 (2013.01); H04S 2400/05 (2013.01); H04S 2420/01 (2013.01)] 23 Claims
OG exemplary drawing
 
1. An audio apparatus comprising:
a receiver,
wherein the receiver is arranged to receive room metadata,
wherein the room metadata is indicative of a plurality of properties of a room;
an estimator circuit,
wherein the estimator circuit is arranged to determine a flutter echo estimate for the room in response to the room metadata,
wherein the flutter echo estimate is indicative of a level of a flutter echo in the room;
a signal generator circuit,
wherein the signal generator circuit comprises a feedback delay network,
wherein the feedback delay network comprises a plurality of feedback loops,
wherein the signal generator circuit is arranged to generate a flutter echo audio signal from first output signals,
wherein the first output signals are from a first portion of the plurality of feedback loops when the plurality of feedback loops are being fed an audio source signal; and
an adapter circuit, wherein the adapter circuit is arranged to change a first parameter for a first feedback loop of the first portion of feedback loops in response to the flutter echo estimate.