Method and device for transmitting audio data based on Bluetooth low energy

A device for transmitting audio data based on Bluetooth low energy, comprising:

• a data acquisition module configured for obtaining a plurality of audio data frames to be transmitted;
• a spectrum division module configured for dividing a quantized spectrum of each audio data frame into M groups of spectrum respectively, wherein M is a positive integer greater than 1;
• a data division module configured for dividing each audio data frame into N groups of data based on the M groups of spectrum, wherein N is a positive integer greater than 1, and each of the N groups of audio data are assigned different transmission priorities based on a respective importance level associated with each of the M groups of spectrum, wherein the respective importance level associated with each of the M groups of spectrum is set based on at least one preset threshold frequency;
• a data transmitting module configured for transmitting the N groups of data according to their respective transmission priorities within a preset transmission times range based on a predetermined Bluetooth low energy transmission protocol, wherein the group of data with a lower transmission priority is transmitted only after the group of data with a higher transmission priority is received correctly.