Sound pressure level-aware music playlists
The present document relates to media players, such as portable electronic devices, vehicle audio systems, home stereo systems, etc. In particular, it relates to the management of the sound pressure level generated by portable electronic devices. A method and system for controlling the cumulated audio dose of a user of a media player is described. The method comprises the steps of determining the audio dose already consumed by the user and of selecting one or more media tracks for play back on the media player based on the audio dose of the media track and the already consumed audio dose of the user.
1. A method for controlling an audio dose consumed by a user of a media player having a processor configured to execute each step of the method, the method comprising:
determining the audio dose already consumed by the user;
determining the audio doses of a plurality of media tracks;
weighting the already consumed audio dose by a first weight;
weighting the audio doses of the plurality of media tracks by respective second weights;
the first and second weights adding up to one;
determining a plurality of potentially consumed audio doses for the plurality of media tracks as a plurality of weighted sums of the already consumed audio dose and the audio doses of the plurality of media tracks, respectively; and
selecting one or more media tracks from the plurality of media tracks for play back on the media player, with a smallest weighted sum amongst the plurality of media tracks or weighted sum smaller than a pre-determined value.
2. The method of claim 1 , wherein determining the already consumed audio dose comprises
determining the audio dose consumed within a pre-determined time interval prior to the time instance of playing back the selected media track.
3. The method of claim 1 , wherein determining the already consumed audio dose comprises
weighting the consumed audio dose with a weight associated with the time instance at which the audio dose was consumed; wherein the weight decreases with increasing anteriority of the consumed audio dose.
4. The method of claim 1 , wherein determining the audio dose of a media track comprises:
determining spectral components of the media track;
weighting the spectral components using weights associated with human auditory perception; and
determining the audio dose of the media track(s) based on the weighted spectral components.
5. The method of claim 1 , comprising:
determining a playlist for playing back media tracks on the media player by selecting media tracks from the plurality of media tracks based on the plurality of weighted sums.
6. The method of claim 1 , wherein determining the audio dose of a media track comprises:
extracting a plurality of segments of the media track using a window function;
determining the audio doses for the plurality of segments of the media track; and
determining the audio dose of the media track as the sum of the audio doses of the plurality of segments of the media track.
7. The method of claim 1 , wherein the second weights depends on the duration of the respective media tracks from the plurality of media tracks.
8. The method of claim 7 , wherein the second weights decreases with an increased duration of the respective media tracks from the plurality of media tracks.
9. The method of claim 1 , further comprising
updating the audio dose consumed by the user, the updating being based on a leaky integration of the previously consumed audio dose and the audio dose of the selected media track.
10. The method of claim 1 , further comprising
selecting a media category including a plurality of media tracks that are available for playback on the media player,
wherein the selection of a media track is restricted to media tracks from the selected category.
11. An electronic device comprising
an audio rendering component operable to generate an audio dose to a user;
a memory operable to store a plurality of media tracks; and
a processor operable to
determine the audio dose already consumed by the user;
determine the audio doses of the plurality of media tracks;
weight the already consumed audio dose by a first weight;
weight the audio doses of the plurality of media tracks by respective second weights;
the first and second weights adding up to one;
determine a plurality of potentially consumed audio doses for the plurality of media tracks as a plurality of weighted sums of the already consumed audio dose and the audio doses of the plurality of media tracks, respectively; and
select a media track from the plurality of media tracks for play back with a smallest weighted sum amongst the plurality of media tracks or weighted sum smaller than a pre-determined value.
12. A non-transitory storage medium comprising a software program adapted for execution on a processor and for performing the method of claim 1 when carried out on a computing device.