Samsung Electronics Co., Ltd.

David Ho Suk Chung

Victor Liang

Fei Xie

Shiang-Feng Lee

Ashish Singhal

Ashwin Chandra

Andres Leonardo De Jesus Ortega Pena

One embodiment provides a method comprising acquiring, via one or more microphones of a device in a spatial area, a signal representing at least one echo of an ultrasound emitted via one or more loudspeakers of the device. The method further comprises applying digital signal processing to the signal to determine a signal-to-noise ratio (SNR) of the signal, and estimating one or more properties of a moving reflector in the spatial area based on the SNR of the signal.

On-device user presence detection using low power acoustics in the presence of multi-path sound propagation

System and method for filtering a data packet using a combined filter are disclosed. In one aspect, the method includes receiving a data packet and N filters. The method includes receiving a data packet and N (wherein N is an integer and N&#x3e;1) filters, each filter comprising a bit mask and corresponding bit values. The method further includes, for each of the N filters, identifying a key element from a portion of the filter corresponding to a combined filter, the key element being a segment of the filter portion having the richest bit pattern. The method further includes generating the combined filter by combining the key element of the N filters. The method further includes filtering the data packet with the combined filter to determine whether there is a match between the data packet and each key element.

System and method for filtering a data packet using a combined filter

System and method for filtering a data packet using a combined filter are disclosed. In one aspect, the method includes receiving a data packet and N filters each comprising a mask and value. The method includes receiving a data packet and N (wherein N is an integer and N&#x3e;1) filters, each filter comprising a bit mask and corresponding bit values. The method further includes generating a common filter mask and the corresponding bit values by taking the overlapping mask bits among portions of the N filters corresponding to the common filter, the common filter being of a length smaller than each filter. The method further includes applying the common filter mask to the data packet to determine whether there is a match between the filtered data packet and each of the N filters.

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Rancho Palos Verdes, CA, United States of America

David Ho Suk Chung