HRTF Parameter Modification for 3D Virtual Audio Localization
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Solution Overview
Problem
Existing 3D audio effect processing technologies using head-response transfer function (HRTF) databases fail to provide effective sound localization in virtual scenes, such as games, due to unrealistic audio proportions and exaggerated sound requirements.
Innovation Solution
A method and apparatus that modify HRTF parameter values based on the specific virtual scene's requirements, including adjusting intensity and proportions, to enhance sound localization by filtering and delaying sound signals using a three-dimensional program engine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing HRTF databases derived from real environment measurements are used for sound processing in virtual scenes, then sound localization can be achieved in real three-dimensional space, but the localization effect becomes undesirable in virtual scenes with exaggerated proportions and unrealistic audio requirements
Solution Approach 1:
The patent modifies HRTF parameters (such as time delay, amplitude, and spectral characteristics) based on the specific virtual scene environment and sound source characteristics, allowing the sound localization system to adapt to exaggerated proportions and unrealistic audio requirements in virtual scenes while maintaining localization accuracy
2Ease of operation
If HRTF computing is performed using hardware computing chips, then three-dimensional localization experience can be provided, but the existing HRTF databases are not suitable for sound processing in virtual scenes with exaggerated volume proportions
Solution Approach 1:
The patent implements dynamic adjustment of HRTF parameters based on the virtual scene context, sound source type, and listener position, allowing the system to adapt in real-time to different virtual environment requirements rather than using fixed HRTF databases designed for real-world measurements
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 improves the realism of sound localization in virtual scenes by optimizing HRTF processing according to virtual environment needs, providing a better three-dimensional audio experience by adapting HRTF parameters for enhanced localization effects.
Implementation Method 1
Theoretically, the human ear perception and localization of a sound in the real three-dimensional world can be precisely simulated by measuring the effects imposed on the sound by processing such as filtering and delaying of the human body
Implementation Method 2
The measured data includes: an inter aural time delay (ITD), an inter aural amplitude difference (IAD), an inter intensity difference (IID), and spectral cues
Data Source
AI summary
The present disclosure discloses a method and an apparatus for sound processing in a three-dimensional virtual scene. The method includes: acquiring, by a three-dimensional program engine, a sound processing request of a sound source point in a virtual scene; invoking a corresponding head-response transfer function (HRTF) according to a three-dimensional coordinate position relationship between the sound source point and a sound recipient in the virtual scene; modifying a parameter value of the HRTF according to the virtual scene where the sound source point is located; and performing filtering and delaying processing on a sound signal of the sound source point by using the modified HRTF. In the present disclosure, an HRTF parameter is modified flexibly according to audio effect requirements of a virtual scene, so that the technical problem that sound localization performed by using an HRTF database of existing hardware in some virtual scenes has undesirable effect is solved, thereby achieving the effect of optimizing three-dimensionally located audio effects.