US 12,756,895 B2 · Use of doppler shift as a basis to determine area of focus

Abstract

A method system for use of Doppler shift as a basis to detect user focus, such as to detect that a user was attracted to audio media and/or to an associated object. A portable processing device carried by the user receives audio media emitted from an audio source at a fixed location, the audio media having periodic watermarking encoded at a baseline frequency. The portable processing device detects a change in frequency of the periodic watermarking over time, such as the frequency progressing from at least being higher than the baseline frequency to being the baseline frequency for at least a predefined threshold period of time. Based on the detected change in frequency of the periodic watermarking over time, the portable device then provides a report indicating that the user was attracted to the audio media and/or to an object (e.g., a commercial object) collocated with the audio source.

Claims20

Dependent claims

A method for use of Doppler shift as a basis to monitor user exposure, the method comprising:

receiving, into a portable processing device at a user, audio media emitted from an audio source at a fixed location, wherein the audio media emitted by the audio source has periodic watermarking encoded in the audio media at a baseline frequency;
detecting, by the portable processing device, a change in frequency of the periodic watermarking over time;
and
using the detected change in frequency of the periodic watermarking over time as a basis to evaluate user exposure to at least one item selected from the group consisting of (i) the audio media and (ii) an object collocated with the audio source,
wherein using the detected change in frequency of the periodic watermarking over time as a basis to evaluate user exposure to the at least one item comprises using the detected change in frequency of the periodic watermarking over time as a basis to determine whether the user (i) progressively approached and moved past the at least one item or rather (ii) approached the at least one item, stayed stationary, and then moved past the at least one item.

2 more elements

A portable processing device comprising:

a microphone configured to receive audio;
a processor;
non-transitory data storage;
and
program instructions stored in the non-transitory data storage and executable by the processor to cause the portable processing device to carry out operations when the microphone receives audio media emitted from an audio source at a fixed location, wherein the audio media emitted by the audio source has periodic watermarking encoded in the audio media at a baseline frequency, the operations including:
detecting a change in frequency of the periodic watermarking over time, and
using the detected change in frequency of the periodic watermarking over time as a basis to evaluate user exposure to at least one item selected from the group consisting of (i) the audio media and (ii) an object collocated with the audio source,
wherein using the detected change in frequency of the periodic watermarking over time as a basis to evaluate user exposure to the at least one item comprises using the detected change in frequency of the periodic watermarking over time as a basis to determine whether a user of the portable processing device (i) progressively approached and moved past the at least one item or rather (ii) approached the at least one item, stayed stationary, and then moved past the at least one item.

5 more elements

A non-transitory computer-readable medium embodying instructions executable by a processor in a portable processing device to cause the portable processing device to carry out operations when the portable processing device receives audio media emitted from an audio source at a fixed location, wherein the audio media emitted by the audio source has periodic watermarking encoded in the audio media at a baseline frequency, the operations comprising:

detecting a change in frequency of the periodic watermarking over time, and
outputting, based on the detected change in frequency of the periodic watermarking over time, a report indicating that a user of the portable processing device was attracted to at least one item selected from the group consisting of (i) the audio media and (ii) an object collocated with the audio source,
wherein using the detected change in frequency of the periodic watermarking over time as a basis to evaluate user exposure to the at least one item comprises using the detected change in frequency of the periodic watermarking over time as a basis to determine whether a user of the portable processing device (i) progressively approached and moved past the at least one item or rather (ii) approached the at least one item, stayed stationary, and then moved past the at least one item.

Dependencies are inferred from the claim text.

Use of doppler shift as a basis to determine area of focus

Life of this patent

Use of doppler shift as a basis to determine area of focus

Life of this patent

Abstract

Claims20