Acoustic communication device and method for filtering an audio signal to attenuate a high frequency section of the audio signal and generating a residual signal and psychoacoustic spectrum mask

摘要

An acoustic communication method and device are provided that filter an audio signal to attenuate a high frequency section of the audio signal; generate a residual signal which corresponds to a difference between the audio signal and the filtered signal; generate a psychoacoustic mask for the audio signal based on a predetermined psychoacoustic model; generate a psychoacoustic spectrum mask by combining the residual signal with the psychoacoustic mask; generate an acoustic communication signal by modulating digital data according to the acoustic signal spectrum mask; and combine the acoustic communication signal with the filtered signal.

主权项

1. An acoustic communication method comprising:
filtering, by a device, an audio signal to attenuate a high frequency section of the audio signal; generating, by the device, a residual signal which corresponds to a difference between the audio signal and the filtered signal; generating, by the device, a psychoacoustic spectrum mask for the audio signal based on a predetermined psychoacoustic model and the residual signal; generating, by the device, an acoustic communication signal by modulating digital data according to the generated psychoacoustic spectrum mask; and combining, by the device, the acoustic communication signal with the filtered signal, radiating, by a speaker, the combined acoustic communication signal and the filtered signal in a form of sound waves.