Machine-led mood change
A machine is configured to identify a media file that, when played to a user, is likely to modify an emotional or physical state of the user to or towards a target emotional or physical state. The machine accesses play counts that quantify playbacks of media files for the user. The playbacks may be locally performed or detected by the machine from ambient sound. The machine accesses arousal scores of the media files and determines a distribution of the play counts over the arousal scores. The machine uses one or more relative maxima in the distribution in selecting a target arousal score for the user based on contextual data that describes an activity of the user. The machine selects one or more media files based on the target arousal score. The machine may then cause the selected media file to be played to the user.
1. A system comprising:
a sensor in a vehicle to obtain a biometric measurement of a driver of the vehicle;
a play count accessor to access play counts that quantify playback of media files; and
a media selector machine to:
compare play counts of the media files to a threshold number of playbacks;
categorize respective ones of the media files as familiar media files when the corresponding play counts satisfy the threshold number of playbacks;
categorize respective ones of the media files as unfamiliar media files when the corresponding play counts do not satisfy the threshold number of playbacks;
access user state scores of the of media files;
select a target user state score based on the biometric measurement of the driver; and
select, as a selected media file, one of the media files to present to the driver based on the user state score of the selected media file, the target user state score, and a status of the selected media file as a familiar media file or an unfamiliar media file.
2. The system of claim 1 , wherein the sensor includes a facial sensor to detect a facial characteristic of the driver.
3. The system of claim 2 , wherein the facial characteristic includes a duration of a blink of an eye of the driver.
4. The system of claim 2 , wherein the facial characteristic includes a frequency of blinks of an eye of the driver.
5. The system of claim 2 , wherein the facial characteristic includes a frequency of movement of an eye of the driver.
6. The system of claim 1 , wherein the sensor includes a heart rate sensor to detect a heart rate of the driver.
7. The system of claim 1 , wherein the media selector machine is to select the target user state score further based on contextual data associated with a user activity.
8. The system of claim 7 , wherein the sensor is a first sensor, and wherein the media selector machine is to identify the user activity based on a measurement from a second sensor in the vehicle.
9. The system of claim 7 , wherein the media selector machine is to identify the user activity based on at least one of Global Positioning System (GPS) data, address book data, calendar data, or prior logged activity data.
10. The system of claim 1 , wherein the biometric measurement includes at least one of:
a force applied by the driver to a portion of a car seat of the vehicle; or
a frequency at which the force applied by the driver to the portion of the car seat fluctuates.
11. The system of claim 1 , wherein the biometric measurement includes at least one of:
a force applied by the driver to a portion of a steering wheel of the vehicle; or
a frequency at which the force applied by the driver to the portion of the steering wheel fluctuates.
12. The system of claim 1 , wherein the sensor is a first sensor, and the system further including a second sensor to detect a vehicle measurement including at least one of:
a frequency at which a brake pedal of the vehicle is pressed by the driver;
a speed of the vehicle; or
a frequency at which the vehicle changes direction, wherein the media selector machine is to select the target user state score based on the vehicle measurement.
13. The system of claim 1 , wherein the media selector machine is to determine a current user state score of the driver based on the biometric measurement of the driver and select the target user state score based on the current user state score.
14. The system of claim 13 , wherein the target user state score and the current user state score relate to extent of arousal and, when the biometric measurement indicates the driver is drowsy, the media selector machine is to select the target user state score corresponding to a higher extent of arousal than the current user state score.
15. The system of claim 13 , wherein the target user state score and the current user state score relate to extent of arousal and, when the biometric measurement indicates the driver is agitated, the media selector machine is to select the target user state score corresponding to a lower extent of arousal than the current user state score.
16. The system of claim 13 , wherein the user state scores of the media files, the target user state score, and the current user state score are multi-dimensional user state scores including at least one of an arousal score, a valence score, or a dominance score.
17. The system of claim 1 , wherein the media selector machine is to select the target user state score from a plurality of target user state scores mapped to predetermined activities.
18. The system of claim 1 , further including a speaker in the vehicle to play the selected media file to the driver.
19. A method comprising:
accessing, by executing an instruction with at least one processor, play counts that quantify playback of media files;
comparing, by executing an instruction with at least one processor, play counts of the media files to a threshold number of playbacks;
selecting, by executing an instruction with at least one processor, a target user state score based on a biometric measurement of a driver of a vehicle obtained via a sensor in the vehicle;
accessing, by executing an instruction with the at least one processor, user state scores of a plurality of media files; and
selecting, by executing an instruction with the at least one processor, as a selected media file, one of the plurality of media files to present to the driver based on the user state score of the selected media file, the target user state score, and a status of the selected media file as meeting or not meeting the threshold number of playbacks.
20. A non-transitory machine readable storage medium comprising instructions that, when executed, cause at least one machine to at least:
access play counts that quantify playback of media files;
compare play counts of the media files to a threshold number of playbacks;
select a target user state score based on a biometric measurement of a driver of a vehicle obtained via a sensor in the vehicle;
access user state scores of a plurality of media files; and
select, as a selected media file, one of the plurality of media files to present to the driver based on the user state score of the selected media file, the target user state score, and a status of the selected media file as meeting or not meeting the threshold number of playbacks.
21. A vehicle comprising:
a sensor to obtain a biometric measurement from a driver of the vehicle, the biometric measurement including at least one of a duration of a blink of an eye of the driver, a frequency of blinks of the eye of the driver, or a frequency of movement of the eye of the driver; and
a media selector machine to:
select a target user state based on the biometric measurement of the driver; and
select as a media file from a plurality of media files to present to the driver based on the target user state.
22. The vehicle of claim 21 , wherein the sensor is a first sensor and the biometric measurement is a first biometric measurement, further including a second sensor to obtain a second biometric measurement of the driver, the second biometric measurement being a heart rate of the driver, the media selector machine to select the target user state further based on the second biometric measurement.
23. The vehicle of claim 22 , wherein the media selector machine is to select the target user state further based on at least one of:
a force applied by the driver to a portion of a car seat of the vehicle;
a frequency at which the force applied by the driver to the portion of the car seat fluctuates;
a force applied by the driver to a portion of a steering wheel of the vehicle;
a frequency at which the force applied by the driver to the portion of the steering wheel fluctuates;
a frequency at which a brake pedal of the vehicle is pressed by the driver;
a speed of the vehicle; or
a frequency at which the vehicle changes direction.