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Apple Patents: Tailoring Music Playback and Dynamically Prolonging Battery Life on iPods and iPhones
Apple describes how they might keep track of individual playback characteristics of songs on an iPod in order to improve the overall user experience. Apple could, for example, track a user's preferences for volume, start time, equalizer settings and other factors and apply those automatically in the future. As an example, Apple gives the start time of a track:
For example, the usage metadata may indicate that a user skips, on average, the first 22 seconds of a particular song so the next time that song is played, the first 22 seconds will automatically be skipped.In another example, Apple suggests that skipped songs which are rarely listened to might be dimmed out or otherwise obscured in favor of songs that the user prefers.
More frequently played songs appear larger.
Meanwhile, another application suggests that the iPod or iPhone could actively determine if there is enough battery life to play the selected video. If not, the user could be given a warning as well as options to degrade the video settings or reduce backlighting in order to prolong battery life enough to watch the entire selection. When not enough battery life is detected, a warning dialog would pop up giving the user an option to simply proceed or make the desired adjustments:
The System Does not Have Sufficient Power for Playing the Entire Selected Video Segment.
Choose "Adjust Settings" for Lowering Power Consumption or Otherwise Choose "View Video" to View Selected Video for the Remaining Time.