Wireless audio synchronization method, wireless audio playback device and wireless audio transceiving system

A wireless audio playback device, comprising:

• a sampling and demodulating module configured to sample, based on a first local clock signal of the wireless audio playback device, a received wireless signal to acquire a sample sequence, and demodulate the sample sequence to acquire a wireless data packet, wherein the wireless data packet comprises a synchronization segment and a data segment, the synchronization segment comprising a synchronization sequence having a fixed pattern, the data segment comprising coded audio data, and the wireless signal is transmitted by a wireless audio transmitting device regularly according to a local clock signal of the wireless audio transmitting device;
• a matching module configured to perform similarity matching on subsequences extracted from the sample sequence using a time sliding window, with a preset local synchronization sequence of the wireless audio playback device, and determine a peak moment corresponding to a maximum one of a plurality of matching values acquired by the similarity matching, wherein each of the subsequences has the same length as the preset synchronization sequence, and the preset synchronization sequence corresponds to a fixed position of the synchronization segment;
• an adjusting module configured to count, based on the first local clock signal, a time difference between peak moments respectively corresponding to a current wireless data packet and a previous wireless data packet, and adjust a clock cycle of the first local clock signal based on a result of the counting so that the result of the counting of the time difference between two adjacent peak moments approaches a predetermined count value;
• and
• a playing module configured to play, after a predetermined number of clock cycles of the first local clock signal from the peak moment corresponding to the current wireless data packet, the data segment or a preset part thereof according to a second local clock signal of the wireless audio playback device, wherein there is a fixed frequency multiple relationship between the first local clock signal and the second local clock signal.