Change standard images from digital cameras and similar sources into the formats compliant with DCF parameters. Enable the playback of files in HDTV photo players, such as the Panasonic Photo Player, or photo frames. Change the aspect ratio and check letterboxes.
All digital cameras save images in a special JPG format, which conforms to DCF specifications. DCF stand for "Digital Still Camera Image File Format Standard" (JEIDA-49).
Most (all?) HDTV photo players, such as the excellent Panasonic