US 12,244,333 B2
Phase shift detection and correction for audio-based data transmissions
Oz Mendel, Oakland, CA (US)
Assigned to LISNR, INC., Cincinnati, OH (US)
Appl. No. 17/756,351
Filed by LISNR, Inc., Cincinnati, OH (US)
PCT Filed Nov. 22, 2019, PCT No. PCT/US2019/062823
§ 371(c)(1), (2) Date May 23, 2022,
PCT Pub. No. WO2021/101571, PCT Pub. Date May 27, 2021.
Prior Publication US 2022/0407547 A1, Dec. 22, 2022
Int. Cl. H04W 4/00 (2018.01); H04B 1/10 (2006.01); H04B 11/00 (2006.01); H04L 43/0852 (2022.01)
CPC H04B 1/1027 (2013.01) [H04B 11/00 (2013.01); H04L 43/0858 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
receiving an audio transmission including symbols, at least a portion of the symbols corresponding to data modulated onto a carrier signal for transmission by the audio transmission;
identifying a first portion of the audio transmission including a first subset of the symbols, the first portion of the audio transmission corresponding to an expected sequence having expected symbols;
comparing the first subset of the symbols to the expected symbols to identify one or more differences between the first subset of the symbols and the expected symbols;
determining, based on the one or more differences between the first subset of the symbols and the expected symbols, a movement speed between a transmitter of the audio transmission and a receiver of the audio transmission;
identifying a second portion of the audio transmission different from the first portion of the audio transmission, the second portion of the audio transmission including a second subset of the symbols; and
correcting the second subset of the symbols based on the movement speed between the transmitter and the receiver.