Head Tracking Sound Localization for Immersive Audio
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Solution Overview
Problem
Current surround sound systems fail to account for the physical location and movement of users within a three-dimensional space, leading to an unrealistic audio experience, especially in gaming and augmented reality environments where sound localization is crucial.
Innovation Solution
The method involves tracking the user's head location using face recognition or other tracking methods and employing acoustic signals based on the user's auditory characteristics to simulate sound origins within a three-dimensional space, ensuring accurate sound localization through Head-Related Transfer Functions (HRTFs) or similar sound localization functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional surround sound systems are used, then sound delivery is simple and device complexity is low, but sound localization accuracy deteriorates because the system does not account for user location and movement in three-dimensional space
Solution Approach 1:
The system performs preliminary calibration by playing test sounds at known locations and having the user indicate perceived directions. This pre-established sound localization function is stored and reused during actual operation, avoiding the need for complex real-time calculations while maintaining accurate sound localization
Solution Approach 2:
The patent introduces a sound localization function as an intermediary between the physical sound sources and the user's perception. This function acts as a mathematical model that translates speaker positions and user head orientation into perceived sound directions, simplifying the overall system while improving accuracy
2Adaptability or versatility
If sound is delivered to multiple speakers in a surround system, then sound coverage is improved, but the ability to simulate accurate sound origins in three-dimensional space deteriorates because user physical location and movement are not considered
Solution Approach 1:
The system dynamically adjusts sound delivery based on the user's current head orientation and position. As the user moves or turns their head, the sound localization function is updated in real-time to maintain accurate sound origin simulation, making the system adaptive to changing user states
Solution Approach 2:
The patent changes key parameters including user head orientation angles, distance from speakers, and perceived sound direction. By continuously updating these parameters based on user movement and position, the system maintains accurate three-dimensional sound localization adaptability
3Measurement precision
If face recognition and tracking methods are used to determine user head location, then sound localization accuracy is improved, but device complexity and processing requirements increase
Solution Approach 1:
The patent replaces complex mechanical tracking systems with face recognition technology using cameras and image processing. Instead of using mechanical sensors or multiple complex devices to track head position, the system uses visual recognition algorithms to determine head orientation and location from video feeds
Solution Approach 2:
The system uses the device's own camera and processing capabilities to perform face recognition and head tracking. The device serves itself by utilizing its built-in resources rather than requiring external tracking equipment, reducing overall system complexity while maintaining precision
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
This approach enhances the audio experience by making sounds appear to originate from specific locations, providing a more immersive and realistic interaction in gaming and augmented reality environments, regardless of the user's physical position or movement.
Implementation Method 1
employing acoustic signals based on the user's auditory characteristics to simulate sound origins within a three-dimensional space, ensuring accurate sound localization through Head-Related Transfer Functions (HRTFs) or similar sound localization functions
Data Source
AI summary
Methods for simulating a source of sound are provided. One method includes determining, by a computer, a location in physical space of a head of a user. The location is determined by capturing images by a camera of the physical space in which a user is located. The method further includes determining a sound for delivery to two speakers worn by the user and determining, by the computer, an emanating location in the physical space for the sound. The method further includes establishing, by the computer, acoustic signals for each speaker based on the location in the physical space of the head, the sound, the emanating location in the physical space, and a selected auditory characteristics of the user. The auditory characteristics of the user are identified based on a calibration process. The method further includes transmitting, by the computer, the acoustic signals to the two speakers. The acoustic signals simulate that the sound originated at the emanating location in space.