Ultrasonic Audio Volume Control for Accurate Gesture Recognition
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The recognition accuracy of ultrasonic-based gesture recognition is compromised when an electronic device plays audio simultaneously, leading to inaccurate results or affecting user audio experience.
Innovation Solution
Adjust the system volume to a preset minimum value required for accurate gesture recognition and calculate a volume adjustment coefficient to maintain consistent audio loudness using a non-linear relationship function, ensuring accurate gesture recognition and unchanged user listening experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the speaker plays ultrasonic waves for gesture recognition, then gesture recognition can be implemented, but recognition accuracy decreases when audio applications are played simultaneously
Solution Approach 1:
The patent segments the audio signal into different frequency components, separating the ultrasonic frequency range (above 20kHz) from the audible frequency range (below 20kHz). This allows independent processing and volume control of ultrasonic gesture recognition signals and audio application signals, eliminating mutual interference and enabling both functions to operate simultaneously with high accuracy.
Solution Approach 2:
The patent changes the frequency parameter of the speaker output to emit ultrasonic waves above 20kHz for gesture recognition. By operating in a different frequency domain than audible audio, the ultrasonic signals do not interfere with audio playback, and the system can independently control the amplitude and characteristics of ultrasonic emissions to maintain recognition accuracy.
2Measurement precision
If the system volume is increased to improve ultrasonic wave intensity for gesture recognition, then recognition accuracy improves, but audio listening effect is affected
Solution Approach 1:
The patent implements separate volume control channels for ultrasonic frequencies and audible frequencies. The system can independently adjust the volume of ultrasonic waves used for gesture recognition without affecting the volume of audible audio applications, and vice versa. This segmentation allows optimal volume settings for each function simultaneously.
Solution Approach 2:
The patent changes the volume control parameter to be frequency-specific rather than system-wide. By introducing frequency-dependent volume adjustment, the system can increase ultrasonic wave intensity for better gesture recognition precision while maintaining appropriate audio listening levels, eliminating the trade-off between the two functions.
3Device complexity
If the speaker is reused for both ultrasonic waves and audio applications, then device complexity is reduced, but gesture recognition rate decreases
Solution Approach 1:
The patent makes the single speaker capable of performing multiple functions by enabling it to emit both audible audio signals and ultrasonic gesture recognition signals simultaneously. Through frequency domain separation and independent amplitude control, the speaker efficiently handles both tasks without requiring additional hardware components, thus maintaining low device complexity while preserving high gesture recognition rates.
Solution Approach 2:
The patent introduces frequency domain separation as an intermediary mechanism that allows the speaker to distinguish between ultrasonic and audible signals. This intermediary approach enables the single speaker to function as multiple independent audio outputs, maintaining gesture recognition accuracy while supporting audio applications without additional hardware complexity.
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
Ensures accurate gesture recognition and maintains consistent audio loudness by adjusting system volume and calculating a volume adjustment coefficient, improving user experience.
Implementation Method 1
an ultrasonic wave is played by using a speaker, and an ultrasonic echo signal is generated after the ultrasonic wave is reflected by a gesture motion
Implementation Method 2
an ultrasonic echo signal is generated after the ultrasonic wave is reflected by a gesture motion. An electronic device further processes the reflected ultrasonic callback signal
Data Source
Figure 1a~1b
Figure 1c~1d
Figure 2a
AI summary
This application provides a volume control method, an electronic device, and a readable storage medium, and belongs to the field of electronic device technologies. The method is applied to the electronic device, the electronic device includes an audio system, and the audio system is capable of emitting an ultrasonic wave. The method includes: The electronic device determines that a target application is started, where the target application is an application that reuses the audio system with the ultrasonic wave; and when a system volume value is less than a preset volume value, the electronic device adjusts the system volume value to be greater than or equal to the preset volume value, and adjusts a volume value of the target application based on an adjusted system volume value, so that listening volume emitted by the electronic device remains unchanged. According to the method in an embodiment of this application, intensity of the ultrasonic wave transmitted by the electronic device can meet intensity of a to-be-implemented function, and listening volume or a change of a user before and after adjustment is not affected. This improves user experience.