US 2026/0136150 A1Published application

Error correction of head-related filters

AssigneeTelefonaktiebolaget LM Ericsson (publ)

InventorsErlendur KARLSSON, Mengqiu ZHANG, Tomas JANSSON TOFTGÅRD

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Abstract

A method for generating a final corrected HR filter dataset, fc. The method includes obtaining a first corrected HR filter dataset, ℋ I ′ , which includes: obtaining an initial HR filter dataset, I; obtaining an extracted HR filter dataset, X, extracted from the initial HR filter dataset, I; obtaining a model, X, of the extracted HR filter dataset, X; generating a modelled HR filter dataset, M, using the model, X; selecting for correction one or more HR filters that are included in the initial HR filter dataset, I, based on the modelled HR filter dataset, M, and the extracted HR filter dataset, X; and generating the first corrected HR filter dataset, ℋ I ′ by correcting the selected one or more HR filters. Either the final corrected HR filter dataset fc is the first corrected HR filter dataset ℋ I ′ or the method further comprises generating the final corrected HR filter set fc.

Claims24

Dependent claims

A method for audio rendering, the method comprising:

obtaining an initial HR filter dataset, I;
obtaining an extracted HR filter dataset, X, extracted from the initial HR filter dataset, I, wherein the extracted HR filter dataset, X, includes an extracted HR filter;
obtaining a model, X, of the extracted HR filter dataset, X;
generating a modelled HR filter dataset, M, using the model, X, wherein the modelled HR filter dataset, M, includes a modelled HR filter;
selecting for correction one or more HR filters that are included in the initial HR filter dataset, I, the selecting comprising:
obtaining a set of time shifts;
for each time shift included in the set of time shifts, obtaining a shifted extracted HR filter using the time shift;
and
calculating an error associated with each of the shifted extracted HR filters;
and
generating a first corrected HR filter dataset,
ℋ
I
′
by correcting the selected one or more HR filters, wherein
a final corrected HR filter set fc is generated based on the first corrected HR filter dataset
ℋ
I
′
or the first corrected HR filter dataset
ℋ
I
′
is the final corrected HR filter dataset fc.

21 more elements

An audio renderer, the audio renderer comprising:

memory;
and
processing circuitry, wherein the audio renderer is configured to perform a method comprising:
obtaining an initial HR filter dataset, I;
obtaining an extracted HR filter dataset, X, extracted from the initial HR filter dataset, I, wherein the extracted HR filter dataset, X, includes an extracted HR filter;
obtaining a model, X, of the extracted HR filter dataset, X;
generating a modelled HR filter dataset, M, using the model, X, wherein the modelled HR filter dataset, M, includes a modelled HR filter;
selecting for correction one or more HR filters that are included in the initial HR filter dataset, I, the selecting comprising:
obtaining a set of time shifts;
for each time shift included in the set of time shifts, obtaining a shifted extracted HR filter using the time shift;
and
calculating an error associated with each of the shifted extracted HR filters;
and
generating a first corrected HR filter dataset,
ℋ
l
′
by correcting the selected one or more HR filters, wherein
a final corrected HR filter set fc is generated based on the first corrected HR filter dataset
ℋ
l
′
or the first corrected HR filter dataset
ℋ
l
′
is the final corrected HR filter dataset fc.

24 more elements

Dependencies are inferred from the claim text.

Facts

Application: 19/442,183Filed 7 Jan 2026
Published: 14 May 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H04S 7/301
Control circuits for electronic adaptation of the sound field: automatic calibration of stereophonic sound system, e.g. with test microphone
H04S 7/302
Control circuits for electronic adaptation of the sound field: electronic adaptation of stereophonic sound system to listener position or orientation
H04S 1/005
Non-adaptive circuits, e.g. manually adjustable or static, for enhancing the sound image or the spatial distribution: for headphones
H04S 7/304
Tracking of listener position or orientation: for headphones

Family

Application18/287,804Continuation
Application19/442,183Continuation
US 12,543,011 B2Related patent
US 2024/0196151 A1Published application
US 2026/0136150 A1This patent

From the US filing history. Foreign family members aren’t listed.