Is a multimedia container for playing audio and video in karaoke mode. There are several options for playback, which switch off all of the streams. This format is supported by a few PC players, but is widely used for DVD-players and home theater systems.
Is a the most popular media container format on phones without the support of 3G, which is currently somewhat outdated. Its main advantage is a compactness. Video data here gets stored in h.263 or MPEG-4 formats. AAAC-LC or AMR-NB are available for audio.