Audio Playback Calibration Using Mapped Room Acoustic Response
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Solution Overview
Problem
Existing media playback systems require physical detection of acoustic responses at multiple spatial locations within a room for effective calibration, which is cumbersome and inefficient.
Innovation Solution
A method that determines a room response by applying a mapping to a microphone location response, using historical data to approximate the room response without physical detection at multiple locations, allowing for calibration of playback devices for improved listening experiences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If physical detection of acoustic responses at multiple spatial locations is performed, then calibration accuracy is improved, but operation complexity and time consumption increase
Solution Approach 1:
The patent uses historical data from previously calibrated rooms to create a mapping that copies and adapts acoustic response characteristics to the current room, eliminating the need for physical measurement at multiple locations while maintaining calibration accuracy
Solution Approach 2:
The system performs preliminary calibration in a reference room and stores the acoustic response data, which is then used to quickly calibrate other rooms without repeating the full measurement process, thereby reducing operation complexity and time
2Measurement precision
If physical detection at multiple spatial locations is performed, then calibration accuracy is improved, but time consumption increases
Solution Approach 1:
The patent applies a mapping derived from historical calibration data to quickly determine room responses without performing time-consuming physical measurements at multiple locations, thus reducing calibration time while maintaining accuracy
Solution Approach 2:
By pre-calibrating reference rooms and storing their acoustic responses, the system enables rapid calibration of new rooms through data mapping rather than performing lengthy measurement procedures, significantly reducing time consumption
3Measurement precision
If physical detection at multiple spatial locations is performed, then calibration accuracy is improved, but device complexity increases
Solution Approach 1:
The patent uses a computational mapping approach that copies acoustic response characteristics from historical data, replacing complex physical measurement systems with a simpler data-driven model that achieves the same calibration accuracy
Solution Approach 2:
The patent replaces the mechanical/physical measurement process with a computational mapping system that uses historical data to determine room responses, thereby reducing hardware complexity while maintaining calibration precision
Data Source
AI summary
An audio playback device comprises a microphone, a speaker, and a processor. The processor is arranged to output by the speaker first audio content and receive by the microphone an indication of the first audio content. A first acoustic response of a room in which the audio playback device is located is determined based on the received indication of first audio content. A mapping is applied to the first acoustic response to determine a second acoustic response. The second acoustic response is indicative of an approximated acoustic response of the room at a spatial location different from a spatial location of the microphone. The second audio content output by the speaker is adjusted based on the second response.