Real-Time Audio Playback Calibration Using Captured Room Feedback
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Solution Overview
Problem
Existing audio processing technologies fail to dynamically adapt to environmental changes and media content variations, leading to inconsistent sound quality and requiring user-initiated calibration with test tones, which disrupts playback and is not adaptive to location or media application changes.
Innovation Solution
An adaptive audio processing system that automatically adjusts audio signals in real-time by comparing initial and played signals, using a controller unit to determine correction parameters and enhance sound quality without user intervention or test tones, dynamically calibrating audio output to maintain consistency across environments and media content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If test tone calibration is performed to adapt speaker to environment, then audio quality is improved, but playback is disrupted and user experience is worsened
Solution Approach 1:
The system performs calibration using actual media content that is already queued for playback, rather than requiring separate test tone playback. The calibration process is initiated automatically before the user would notice any disruption, using the first portion of the actual media content that is intended to be played anyway.
Solution Approach 2:
The system captures a copy of the media content signal from the audio output component and processes this copy for calibration purposes. The audio input component captures the played content, creating a copy that can be analyzed without affecting the original playback stream.
2Manufacturing precision
If static calibration is performed with fixed speaker arrangement, then initial audio quality is improved, but adaptation to environmental changes and location changes is lost
Solution Approach 1:
The system transitions from static calibration to dynamic calibration by continuously monitoring audio characteristics during playback. The controller unit determines whether calibration is needed by comparing audio characteristics captured from the environment with expected characteristics, allowing the system to adapt to environmental changes, speaker location changes, and media type changes in real-time.
Solution Approach 2:
The system uses feedback from the audio input component that continuously captures played content. By analyzing the captured audio characteristics and comparing them with the original media content characteristics, the system can detect environmental changes and trigger recalibration when needed, creating a closed-loop adaptive system.
3Adaptability or versatility
If calibration is initiated by user with external hardware, then calibration capability is achieved, but device complexity and ease of operation are worsened
Solution Approach 1:
The system performs calibration automatically using its own built-in audio output component and audio input component, without requiring external calibration hardware or user initiation. The controller unit autonomously determines when calibration is needed and executes the calibration process using the device's own resources.
Solution Approach 2:
The audio input component serves dual purposes: it functions as both a regular audio input device for user interactions and as a calibration microphone for detecting played content. This eliminates the need for separate calibration hardware while maintaining full calibration capability.
4Adaptability or versatility
If test tone playback is used for calibration, then environmental adaptation is achieved, but media content consistency is lost
Solution Approach 1:
The system performs calibration using the first portion of the actual media content that is queued for playback, before the user would notice any disruption. This ensures that the calibration is based on the actual content that will be played, maintaining consistency between calibration and playback.
Solution Approach 2:
The system changes the parameter being used for calibration from fixed test tones to variable actual media content characteristics. By analyzing the audio characteristics of the actual media content being played, the system adapts the calibration process to match the specific content, ensuring media content consistency while still achieving environmental adaptation.
Data Source
AI summary
A method includes determining one or more audio characteristics of a first digital signal representing a first portion of streaming media content provided by a media playback application to an audio output component; playing the first portion of the media content into an environment; capturing, by an audio output component, a second digital signal representing the first portion of the media content as played; determining, based on the captured second digital signal, one or more detected audio characteristics of the media content as played into the environment; determining a difference between the one or more audio characteristics of the media content and the one or more detected audio characteristics; calibrating a second portion of the media content based on the difference and based on a determination that the second portion is to be calibrated; and playing, by the audio output component into the environment, the second portion as calibrated.