Patent ID: 11862000
Assignee: VERIZON PATENT AND LICENSING INC.
Field: Control (Instruments)
Classification: CPC G | IPC G

Claim 19:
20. The non-transitory computer-readable medium of claim 15, wherein the one or more instructions, that cause the device to perform the spectrogram analysis of the frequency versus time graph to determine the quantity of people in the zone and the start and stop times, cause the device to:
calculate an exponential moving average based on the frequency versus time graph;
determine that people are entering or exiting the zone based on the exponential moving average satisfying a noise threshold;
calculate the start and stop times and velocities of the people based on the exponential moving average;
calculate motion energies of the people based on normalized fast Fourier transform coefficients; and
determine the quantity of the people based on the velocities of the people and the motion energies.