ALEXANDRIA, Va., Oct. 27 -- United States Patent no. 12,773,119, issued on Oct. 27, was assigned to Anhui Huami Health Technology Co. Ltd. (Hefei, China).
"Wearable device, and heart rate tracking method and apparatus thereof" was invented by Mingxi Zhao (Hefei, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided are a wearable device, as well as a heart rate tracking method and a heart rate tracking apparatus thereof. The method includes obtaining a photo pethysmo graphic (PPG) signal of the wearable device within a preset time, obtaining a frequency spectrum corresponding to the PPG signal by a short-time Fourier transformation of the PPG signal, generating a curve cluster according to the freque...