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    • 1. 发明公开
    • ULTRASONIC WAVE-BASED VOICE SIGNAL TRANSMISSION SYSTEM AND METHOD
    • EP3457719A1
    • 2019-03-20
    • EP16903578.9
    • 2016-06-03
    • Huawei Technologies Co., Ltd.
    • DENG, ChaojunFANG, Liming
    • H04S7/00
    • Embodiments of the present invention disclose an ultrasonic wave-based voice signal transmission system. The apparatus includes an ultrasonic modulator, a beamforming controller, an ultrasonic transducer array, and a user detector. The ultrasonic modulator is configured to modulate a voice signal onto an ultrasonic band and output the modulated voice signal to the beamforming controller. The user detector is configured to detect a user and output a detection result of the user to the beamforming controller. The beamforming controller is configured to control, according to the detection result output by the user detector 102, a phase and an amplitude of the modulated voice signal, to obtain an electrical signal that points to the user, and output, to the ultrasonic transducer array, the electrical signal that points to the user. The ultrasonic transducer is configured to convert the electrical signal that points to the user and that is output by the beamforming controller into an ultrasonic signal with a beam pointing to the user, and transmit the ultrasonic signal. According to the foregoing solution, call convenience can be improved for the user.