Harmonic transponder integrated with previous versions to reconstruct high frequency audio signals

摘要

A method of encrypting audio bit stream is presented. The method includes receiving encrypted audio bit stream and decoding audio data to generate low encrypted audio signal. This method also includes extracting high-frequency reconstruction metadata and filtering decoded low-frequency audio signals through a high-frequency filter library.Analysis of low-bandwidth audio signals generated after decryption. The method also includes extracting a slogan to indicate whether spectrum transmission or harmonic conversion is needed in audio data, and using low filter band audio signal and reconstructing metadata D to generate a high frequency band audio signal. E According to the high frequency of the flag.