20240021184. AUDIO SIGNAL PROCESSING METHOD AND SYSTEM FOR ECHO SUPRESSION USING AN MMSE-LSA ESTIMATOR simplified abstract (Analog Devices International Unlimited Company)
Contents
AUDIO SIGNAL PROCESSING METHOD AND SYSTEM FOR ECHO SUPRESSION USING AN MMSE-LSA ESTIMATOR
Organization Name
Analog Devices International Unlimited Company
Inventor(s)
Abdel Yussef Hussenbocus of HEVERLEE (BE)
Christophe Mansard of BRUXELLES (BE)
Stijn Robben of BOUTERSEM (BE)
AUDIO SIGNAL PROCESSING METHOD AND SYSTEM FOR ECHO SUPRESSION USING AN MMSE-LSA ESTIMATOR - A simplified explanation of the abstract
This abstract first appeared for US patent application 20240021184 titled 'AUDIO SIGNAL PROCESSING METHOD AND SYSTEM FOR ECHO SUPRESSION USING AN MMSE-LSA ESTIMATOR
Simplified Explanation
The abstract describes an audio signal processing method implemented by an audio system with an audio sensor and a speaker unit. The method involves measuring acoustic signals reaching the audio sensor and producing a sensor audio signal. It also retrieves a speaker audio signal corresponding to a speaker acoustic signal from the speaker unit while measuring the acoustic signals to produce the sensor audio signal. The speaker and sensor audio signals are then converted to speaker and sensor audio spectra. Based on the speaker audio spectrum, an echo audio spectrum caused by the speaker acoustic signal in the sensor audio signal is estimated. Echo suppression gains are computed using a mmse-lsa estimator based on the echo audio spectrum and the sensor audio spectrum. Finally, the echo suppression gains are applied to the sensor audio spectrum.
- The audio system measures acoustic signals reaching the audio sensor and produces a sensor audio signal.
- The speaker audio signal corresponding to the speaker acoustic signal is retrieved from the speaker unit.
- The speaker and sensor audio signals are converted to speaker and sensor audio spectra.
- An echo audio spectrum caused by the speaker acoustic signal in the sensor audio signal is estimated based on the speaker audio spectrum.
- Echo suppression gains are computed using a mmse-lsa estimator based on the echo audio spectrum and the sensor audio spectrum.
- The echo suppression gains are applied to the sensor audio spectrum.
Potential applications of this technology:
- Audio conferencing systems
- Voice recognition systems
- Telecommunication systems
- Audio recording and playback devices
Problems solved by this technology:
- Echo caused by the speaker acoustic signal in the sensor audio signal is suppressed.
- Improved audio quality in communication systems.
Benefits of this technology:
- Enhanced audio clarity and intelligibility.
- Improved user experience in audio-based applications.
- Reduction of echo-related issues in audio systems.
Original Abstract Submitted
an audio signal processing method implemented by an audio system with an audio sensor and a speaker unit includes: measuring, by the audio sensor, acoustic signals reaching the audio sensor, producing a sensor audio signal; retrieving a speaker audio signal corresponding to a speaker acoustic signal from the speaker unit while measuring the acoustic signals reaching the audio sensor to produce the sensor audio signal; converting the speaker and sensor audio signals to speaker and sensor audio spectra; estimating, based on the speaker audio spectrum, an echo audio spectrum of an echo audio signal caused by the speaker acoustic signal in the sensor audio signal; computing, based on the echo audio spectrum and the sensor audio spectrum, echo suppression gains to be applied to the sensor audio spectrum, by using a mmse-lsa estimator; and applying the echo suppression gains to the sensor audio spectrum.
