: Usually paired with AAC-LC audio up to 160 Kbps. 3. "Deep Text" and Research
The number is the signature pixel density (PPI) for Apple's original Retina Display . 326 mp4
: Apple provides "deep" documentation on iPhone 5c and iPhone 4 specs, covering everything from the 326 ppi display to MP4 playback limits. : Usually paired with AAC-LC audio up to 160 Kbps
The standard video format for these 326 ppi devices is . 326 mp4
If your query refers to technical research rather than hardware: