Cadence Determination and Media Content Selection

Patent metadata

Field	Value
Publication number	US-2016343399-A1
Application number	US-201514883232-A
Country	US
Kind code	A1
Filing date	Oct 14, 2015
Priority date	May 19, 2015
Publication date	Nov 24, 2016
Grant date	—

Abstract

Systems, devices, apparatuses, components, methods, and techniques for cadence determination and media content selection are provided. An example media-playback device comprises a media-output device that plays media content items, a cadence-acquiring device, and a cadence-based media content selection engine. The cadence-acquiring device includes an accelerometer and a cadence-determination engine configured to determine a cadence based on acceleration data captured by the accelerometer. The cadence-based media content selection engine is configured to identify a media content item based on the cadence determined by the cadence-determining engine and cause the media-output device to playback the identified media content item.

First claim

1 . A media-playback device comprising:
a media-output device that plays media content items; a cadence-acquiring device comprising an accelerometer and a cadence-determination engine configured to:
capture a sequence of measurements from the accelerometer;
filter the sequence of measurements based on frequency to generate a filtered sequence;
calculate a first aggregate value corresponding to a period of oscillation of the filtered sequence over a duration;
calculate a second aggregate value corresponding to a smoothing of the first aggregate value;
determine whether the first aggregate value and the second aggregate value satisfy predetermined tolerances, wherein the predetermined tolerances include a difference tolerance and a duration requirement; and
upon determining that the predetermined tolerances are satisfied, calculate a cadence value based on the first aggregate value; and
a cadence-based media content selection engine configured to:
identify a media content item based on the cadence determined by the cadence-determining engine; and
cause the media-output device to playback the identified media content item.

2 . The media-playback device of claim 1 , wherein the media-playback device is a smartphone.

3 . The media-playback device of claim 1 , wherein the cadence-based media content selection engine is further configured to upon the cadence-acquiring device acquiring a cadence, generate a cadence acquired output comprising at least one of an audible signal and a visual indicator.

4 . The media-playback device of claim 1 , wherein the cadence-based media content selection engine is configured to identify a media content item that includes music with a tempo that is within a predetermined threshold of the cadence.

5 . The media-playback device of claim 1 , wherein the cadence-based media content selection engine is further configured to:
monitor for changes in cadence determined by the cadence determining engine; and upon detecting a change in cadence:
identify a second media content item based on a changed cadence; and
cause the media-output device to playback the identified second media content item.

6 . The media-playback device of claim 5 , wherein the cadence-based media content selection engine is further configured to, upon detecting a change in cadence, generate a cadence changed output.

7 . (canceled)

8 . The media-playback device of claim 1 , wherein the duration is measured in terms of steps.

9 . The media-playback device of claim 1 , wherein the duration is measured in terms of time.

10 . (canceled)

11 . The media-playback device of claim 1 , wherein the cadence-acquiring device comprises three orthogonally-oriented accelerometers and the cadence-determination engine is configured to:
capture sequences of measurements from each of the three accelerometers; filter the sequences of measurements based on frequency to generate filtered sequences; and identify the sequence of measurements corresponding to cadence, wherein the sequence is identified based on calculating an energy of each of the sequences.

12 . The media-playback device of claim 1 , wherein measurements are captured at a sample rate in the range of 20-200 Hz.

13 . The media-playback device of claim 1 , wherein the media content item is stored locally on the media-playback device.

14 . The media-playback device of claim 1 , wherein the media content item is streamed to the media-playback device by a media-delivery system based on a request for media content items that specifies the cadence.

15 . A method of cadence-based media playback for use during repetitive-motion activities comprising:
determining a cadence associated with a repetitive motion activity based on acceleration data captured by a plurality of accelerometers, wherein the acceleration data comprises sequences of acceleration sample data captured from each of the plurality of accelerometers over a duration of time, by:
filtering the sequences of measurements based on frequency to generate filtered sequences;
identifying a signal corresponding to the cadence from the filtered sequences by combining the filtered sequences having a highest energy at each particular time interval;
calculating aggregate values corresponding to periods of oscillation of the filtered sequences over intervals during the duration of time; and
calculating a cadence value based on the aggregate values;
identifying a media content item based on the determined cadence; and playing back the identified media content item.

16 - 17 . (canceled)

18 . The method of claim 15 further comprising:
smoothing the aggregate values to generate smoothed aggregate values;
determining whether the aggregate value and the smoothed aggregate value satisfy predetermined tolerances, wherein the predetermined tolerances include a difference tolerance and a duration requirement; and
upon determining that the predetermined tolerances are satisfied, calculating a cadence value based on the aggregate value.

19 . The method of claim 15 further comprising:
monitoring the acceleration data captured by the plurality of accelerometers to detect changes in cadence; and
upon detecting a change in cadence identifying a second media content item based on the changed cadence and playing back the second media content item.

20 . A method of cadence-based media playback for use during repetitive-motion activities comprising:
capturing acceleration data by a plurality of accelerometers over a duration of time, wherein the acceleration data comprises sequences of acceleration measurements captured at particular times throughout the duration by each of the accelerometers; filtering each of the sequences of measurements based on frequency to generate filtered sequences; identifying a cadence signal corresponding to the cadence from the filtered sequences, wherein the signal corresponding to the cadence is identified by combining the filtered sequences having a highest energy during subintervals of the duration; calculating a sequence of first aggregate values corresponding to periods of oscillation of the cadence signal over intervals during the duration of time; smoothing the sequence of first aggregate values to generate a sequence of second aggregate values; determining whether the sequence of first aggregate values and the sequence of second aggregate values satisfy predetermined tolerances, wherein the predetermined tolerances include a difference tolerance and a duration requirement; and upon determining that the predetermined tolerances are satisfied, calculating an initial cadence value based on the sequence of first aggregate values.

Assignees

• Spotify Ab

Inventors

• Jehan Tristan
• Garmark Sten
• Dziuk Dariusz
• Sen Rahul
• Smith Owen
• Olofsson Lars Christian
• Toumpelis Nikolaos

Classifications

• G11B20/10527 Primary

  Audio or video recording; Data buffering arrangements (G11B20/12 - G11B20/18 take precedence) · CPC title

• A61B5/742

  using visual displays (displays for heart-related electrical signals, e.g. ECG, A61B5/339) · CPC title

• A61B2503/12

  Healthy persons not otherwise provided for, e.g. subjects of a marketing survey · CPC title

• A61B5/7405

  using sound · CPC title

• A61B2562/0219

  Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches · CPC title