System and method of double talk detection with acoustic echo and noise control

摘要

System of improving sound quality includes loudspeaker, microphone, accelerometer, acoustic-echo-cancellers (AEC), and double-talk detector (DTD). Loudspeaker outputs loudspeaker signal including downlink audio signal from far-end speaker. Microphone generates microphone uplink signal and receives at least one of: near-end speaker, ambient noise, and loudspeaker signals. Accelerometer generates accelerometer-uplink signal and receives at least one of: near-end speaker, ambient noise, and loudspeaker signals. First AEC receives downlink audio, microphone-uplink and double talk control signals, and generates AEC-microphone linear echo estimate and corrected AEC-microphone uplink signal. Second AEC receives downlink audio, accelerometer uplink and double talk control signals, and generates AEC-accelerometer linear echo estimate and corrected AEC-accelerometer uplink signal. DTD receives downlink audio signal, uplink signals, corrected uplink signals, linear echo estimates, and generates double-talk control signal. Uplink audio signal including at least one of corrected microphone-uplink signal and corrected accelerometer-uplink signal is generated. Other embodiments are described.

主权项

1. A system for double talk detection with acoustic echo and noise control comprising:
a loudspeaker to output a loudspeaker signal including a downlink audio signal from a far end speaker; a microphone to receive at least one of: a near-end speaker signal, ambient noise signal, and the loudspeaker signal, and to generate a microphone uplink signal; an accelerometer to receive at least one of: the near-end speaker signal, ambient noise signal, and the loudspeaker signal, and to generate an accelerometer uplink signal; first acoustic-echo-canceller (AEC) to receive the downlink audio signal, the microphone uplink signal, and a double-talk control signal, and to generate a corrected AEC-microphone uplink signal and an AEC-microphone linear echo estimate; second AEC to receive the downlink audio signal, the accelerometer uplink signal, and the double-talk control signal, and to generate a corrected AEC-accelerometer uplink signal and an AEC-accelerometer linear echo estimate; and a double talk detector to receive the downlink audio signal, the microphone uplink signal, the accelerometer uplink signal, the corrected AEC-microphone uplink signal, the corrected AEC-accelerometer uplink signal, the AEC-microphone linear echo estimate, and the AEC-accelerometer linear echo estimate, and to generate the double talk control signal based on the downlink audio signal, the microphone uplink signal, the accelerometer uplink signal, the corrected AEC-microphone uplink signal, the corrected AEC-accelerometer uplink signal, the AEC-microphone linear echo estimate, and the AEC-accelerometer linear echo estimate, wherein the double talk control signal indicates to the first and second AEC to adapt or to maintain previous settings, respectively; and a signal corrector to generate an uplink audio signal that includes at least one of: the corrected AEC-microphone uplink signal and the corrected AEC-accelerometer uplink signal.