Embodiments of the invention provide for audio file management for synchronized audio playback in coordination with external video playback. In an embodiment of the invention, a method for audio file management for synchronized audio playback in coordination with external video playback includes receiving a request to synchronize playback of an audio file locally stored in a mobile device with audio resulting from projection of a motion picture in a movie theater. The method additionally includes synchronizing playback of the audio file with the audio resulting from the projection of the motion picture in response to receiving the request. The method yet further includes determining that the synchronized playback of the audio file in the mobile device has completed. Finally, the method includes responding to the determination, by irretrievably modifying the audio file in the mobile device and by subsequently deleting the irretrievably modified audio file from the mobile device.

Embodiments of the invention provide for audio file management for synchronized audio playback in coordination with external video playback. In an embodiment of the invention, a method for audio file management for synchronized audio playback in coordination with external video playback includes receiving a request to synchronize playback of an audio file locally stored in a mobile device with audio resulting from projection of a motion picture in a movie theater. The method additionally includes synchronizing playback of the audio file with the audio resulting from the projection of the motion picture in response to receiving the request. The method yet further includes determining that the synchronized playback of the audio file in the mobile device has completed. Finally, the method includes responding to the determination, by irretrievably modifying the audio file in the mobile device and by subsequently deleting the irretrievably modified audio file from the mobile device.

A playback apparatus to play back content data including sound data includes an instruction operating portion to detect an instruction operation that instructs execution of prescribed processing, a hold operating portion to detect a hold setting operation that sets a state of not accepting the instruction operation to the instruction operating portion, a state control portion to set the state of not accepting the instruction operation to the instruction operating portion if the hold setting operation is detected by the hold operating portion, and a video processing portion to perform processing for displaying a video. If the video processing portion performs processing for displaying the video when the hold setting operation is detected, the state control portion controls the video processing portion to suspend at least a part of processing for displaying the video.

A light control and display technology applicable to light redirection and projection with the capacity, in a number of embodiments modified for particular applications, to produce managed light, including advanced images. Applications include miniature to very large scale video displays, optical data processing, 3-dimensional imaging, and lens-less vision enhancement for poor night-driving vision, cataracts and macular degeneration.

Embodiments of the invention provide a method, system and computer program product for mobile device management during synchronized audio playback in coordination with external video playback. In an embodiment of the invention, a method for mobile device management during synchronized audio playback in coordination with external video playback includes receiving in memory of a mobile device a request to synchronize playback of an audio file through the mobile device with a presentation of video externally to the mobile device and in response to the request, automatically dimming a display of the mobile device and synchronizing playback of the audio file with the external presentation of the video.