Techniques for performing positional calibration for a multi-channel speaker system using directional microphone arrays
By employing directional microphone arrays to capture test audio and determine room impulse responses, the method addresses the challenges of speaker position calibration and channel assignment in multi-channel speaker systems, achieving accurate and automated calibration for enhanced audio quality.
WO2025065141A1 Publication Date: 2025-04-03HARMAN INT IND INC +1
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Patent Information
- Application Number
- PCT/CN2023/121054
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-09-25
- Publication Date
- 2025-04-03
AI Technical Summary
Technical Problem
Existing multi-channel speaker systems face challenges in accurately calibrating speaker positions and assigning channels due to the limitations of external microphones and omni-directional microphones, particularly in compact structures.
Method used
The use of directional microphone arrays within audio output devices to capture test audio objects, determine room impulse responses, and automatically calibrate speaker positions and assign channels, ensuring accurate sound localization and quality.
Benefits of technology
This approach enables precise and automated calibration of speaker positions, eliminating the risk of reversed sound images and compromised audio quality, while also simplifying the setup process and ensuring robust calibration outcomes in compact environments.
✦ Generated by Eureka AI based on patent content.
Abstract
A method for performing positional calibration for a multi-channel audio system includes capturing, using a plurality of directional microphones within a first audio output device, a test audio object emitted by a second audio output device. The method further includes determining, for each of the plurality of directional microphones, a respective room impulse response (RIR) associated with the test audio object captured by the directional microphone. Additionally, the method includes determining a position of the second audio output device relative to the first audio output device based on the RIRs and assigning a respective channel in the multi-channel audio system to each of the first audio output device and the second audio output device based on the computed position. The method also includes emitting audio from the first audio output device based on the respective channel assigned to the first audio output device.
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