Gyro-Based HRTF Switching for Stereo Audio Clarity
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Solution Overview
Problem
Audio output devices like headphones struggle to provide effective stereo sound effects, especially in voice communication environments, as they apply stereo sound uniformly to all audio signals, leading to reduced voice clarity.
Innovation Solution
An electronic device equipped with a gyro sensor and memory storing head-related transfer functions, which applies different stereo sound effects based on the device's orientation, using a processor to generate stereo signals by switching between corresponding head-related transfer functions when the device rotates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If stereo sound effect is applied to all audio signals, then stereo sound quality is improved, but voice clarity is reduced
Solution Approach 1:
The patent applies different audio processing methods to different audio signals based on their type. Stereo sound effects are applied to music and entertainment audio signals, while voice signals are processed differently to maintain clarity. This local differentiation resolves the contradiction by not applying uniform processing to all signals.
Solution Approach 2:
The system changes the audio processing parameters dynamically based on signal type detection. When voice signals are detected, the system adjusts parameters to prioritize clarity; when music or entertainment audio is detected, stereo effects are enhanced. This parameter adaptation allows optimal performance for each signal type.
2Manufacturing precision
If head related transfer function is applied for every orientation, then stereo sound realism is improved, but memory space and data throughput increase
Solution Approach 1:
The patent dynamically selects and applies head-related transfer functions based on the current orientation of the audio output device. Instead of storing and processing all possible orientation functions simultaneously, the system loads only the relevant HRTF for the current spatial position, reducing memory requirements while maintaining realism.
Solution Approach 2:
The patent segments the orientation space into discrete categories and stores corresponding HRTFs for each segment. This segmentation allows the system to manage memory efficiently by only loading the HRTF segment relevant to the current orientation, rather than handling all orientations at once.
Data Source
AI summary
An electronic device according to various embodiments of the present invention may comprise: a gyro sensor for sensing rotation of an electronic device; a memory for storing a plurality of head related transfer functions corresponding to a plurality of directions; and a processor configured to generate a stereo signal by applying, to an audio signal, a first head related transfer function corresponding to a first direction, generate a stereo signal by applying, to the audio signal, a second head related transfer function corresponding to a third direction symmetric to a second direction with reference to the first direction when the electronic device rotates from the first direction to the second direction, and generate a stereo signal by applying the first head related transfer function to the audio signal when a pre-designated time elapses after the electronic device rotates from the first direction to the second direction.