20240046945. AUDIO SIGNAL PROCESSING METHOD AND SYSTEM FOR ECHO MITIGATION USING AN ECHO REFERENCE DERIVED FROM AN INTERNAL SENSOR simplified abstract (Analog Devices International Unlimited Company)
AUDIO SIGNAL PROCESSING METHOD AND SYSTEM FOR ECHO MITIGATION USING AN ECHO REFERENCE DERIVED FROM AN INTERNAL SENSOR
Organization Name
Analog Devices International Unlimited Company
Inventor(s)
Jean-Marc Luneau of Bruxelles (BE)
AUDIO SIGNAL PROCESSING METHOD AND SYSTEM FOR ECHO MITIGATION USING AN ECHO REFERENCE DERIVED FROM AN INTERNAL SENSOR - A simplified explanation of the abstract
This abstract first appeared for US patent application 20240046945 titled 'AUDIO SIGNAL PROCESSING METHOD AND SYSTEM FOR ECHO MITIGATION USING AN ECHO REFERENCE DERIVED FROM AN INTERNAL SENSOR
Simplified Explanation
The disclosed patent application describes an audio signal processing method implemented by an audio system with internal and external sensors and a speaker unit. The method involves the following steps:
1. Measuring acoustic signals reaching the internal sensor and external sensor simultaneously to produce internal and external audio signals. 2. Converting the internal audio signal to the frequency domain to generate an internal audio spectrum. 3. Converting the external audio signal to the frequency domain to generate an external audio spectrum. 4. Estimating an echo audio spectrum of the echo audio signal caused by the speaker unit in the external audio signal, based on the internal audio spectrum. The estimation is performed for frequencies above a minimum frequency of 600 hertz. 5. Correcting the external audio spectrum for frequencies above the minimum frequency based on the estimated echo audio spectrum.
Potential applications of this technology:
- Audio systems in conference rooms or auditoriums where echo cancellation is crucial for clear sound reproduction.
- Telecommunication systems to improve audio quality during calls or video conferences.
- Public address systems in large venues to enhance sound clarity and reduce echo.
Problems solved by this technology:
- Echo cancellation: The method effectively estimates and corrects the echo audio spectrum caused by the speaker unit, improving the overall audio quality by reducing echo.
- Clear sound reproduction: By eliminating or minimizing echo, the technology ensures that audio signals are accurately reproduced without interference or distortion.
Benefits of this technology:
- Improved audio quality: By effectively canceling echo, the technology enhances the clarity and intelligibility of audio signals.
- Enhanced user experience: Users of audio systems or telecommunication devices can enjoy clear and natural sound without the annoyance of echo.
- Versatile applications: The technology can be implemented in various audio systems and devices, making it applicable in different settings and industries.
Original Abstract Submitted
disclosed is an audio signal processing method implemented by an audio system including at least an internal sensor, an external sensor and a speaker unit. the audio signal processing method includes: producing internal and external audio signals by measuring simultaneously acoustic signals reaching the internal sensor and acoustic signals reaching the external sensor, respectively; converting the internal audio signal to frequency domain, thereby producing an internal audio spectrum; converting the external audio signal to frequency domain, thereby producing an external audio spectrum; estimating, based on the internal audio spectrum, an echo audio spectrum of an echo audio signal caused by the speaker unit in the external audio signal, wherein the echo audio spectrum is estimated for frequencies above a minimum frequency, wherein the minimum frequency ≥600 hertz; and correcting the external audio spectrum for frequencies above the minimum frequency, based on the echo audio spectrum.
