Camera-Based Speaker Layout Calibration for Real Listening Positions
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Solution Overview
Problem
Existing speaker calibration methods require additional microphones and emit noise, and do not account for the listening position and orientation, making them inconvenient and suboptimal for flexible speaker arrangements in non-standard spaces.
Innovation Solution
A method using image capture and analysis to determine speaker arrangement, calculating distances between speakers and the listening position without emitting noise, allowing for flexible and accurate calibration based on actual speaker positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional speaker calibration methods using microphones and noise emission are employed, then speaker arrangement can be determined, but the process becomes inconvenient and requires additional equipment
Solution Approach 1:
The patent replaces the acoustic measurement system (microphones and noise emission) with an optical imaging system (camera). The camera captures images of speakers, and the system calculates distances and positions based on image analysis and geometric relationships, eliminating the need for acoustic calibration equipment
Solution Approach 2:
The patent creates a visual copy of the physical speaker arrangement through camera imaging. Instead of measuring acoustic properties, the system captures an optical representation of the speaker positions and derives spatial information from this visual copy, simplifying the calibration process
2Ease of operation
If speaker calibration is performed without considering listening position and orientation, then the process is simplified, but sound quality at the listening position deteriorates
Solution Approach 1:
The patent performs preliminary capture of the listening position and orientation information through camera imaging before conducting the speaker arrangement determination. The system uses this pre-captured spatial reference information to accurately calculate speaker positions relative to the listening position, ensuring both operational simplicity and sound quality
3Reliability
If speakers are arranged according to strict symmetric standards for optimal audio experience, then sound quality is improved, but adaptability to non-standard spaces is reduced
Solution Approach 1:
The patent transitions from static, fixed speaker arrangement standards to a dynamic system that adapts to any speaker configuration. The camera-based imaging system captures the actual speaker positions regardless of symmetry, and the processing system calculates optimal audio parameters based on the measured arrangement, enabling adaptation to both standard and non-standard spaces
Solution Approach 2:
The patent changes the calibration approach from requiring fixed geometric parameters (symmetric arrangements) to measuring actual physical parameters (distances and positions) through imaging. This allows the system to work with any speaker configuration by using the measured parameters to calculate appropriate audio processing settings
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables soundless calibration that accounts for the listening position, reducing costs and improving sound quality by adjusting audio signals based on the actual speaker arrangement.
Implementation Method 1
acquiring one or more images, where the one or more images are captured by an image capture device
Data Source
AI summary
A method, an apparatus, and an electronic device for determining a speaker arrangement in a predetermined space are provided. The method may include: acquiring one or more images, where the one or more images are captured by an image capture device at a predetermined position in the predetermined space and each of the plurality of speakers is included in at least one of the one or more images; determining, for each of the one or more images, a distance between a speaker included in the image and the predetermined position based on an image height and a nominal height of the speaker included in the image and a focal length of the image capture device; determining distances between every two adjacent speakers of the plurality of speakers; and determining the speaker arrangement based on the distance between the speaker and the predetermined position.