The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 24, 2026
Filed:
Dec. 13, 2023
Google Llc, Mountain View, CA (US);
Jyrki Antero Alakuijala, Wollerau, CH;
Matthew Sharifi, Kilchberg, CH;
Martin Bruse, Tyreso, SE;
Zoltan Szabadka, Gyorujbarat, HU;
Thomas Fischbacher, Gattikon, CH;
Sami Boukortt, Zurich, CH;
Moritz Firsching, Basel, CH;
Evgenii Kliuchnikov, Thalwil, CH;
Google LLC, Mountain View, CA (US);
Abstract
Spatial audio may be generated by a speaker array that is switched according to rows and/or columns to reduce its cost and complexity. The speaker array may include a row of speakers that are each coupled to a different column channel. The rows of speakers can receive portions of the spatial audio on a row-by-row basis as each row is activated to couple the speakers in a row to their respective column. This switched approach reduces a number of required audio sources. The audio sources may generate PWM signals for each column using an approach that is similar to that found in Class-D amplification or sigma-delta Modulation. Analog signals may be recovered from the PWM signals using a low-pass filter positioned before each speaker in the array.