480p
ATSC Progressive Mode Standards:
ATSC standards define 480p as 640x480p (4:3) at 24, 30, or 60 frames per second. When broadcast, 480p30 is frame doubled then interlaced to 480i60, while 480p24 is processed using the 3:2 pulldown technique to 480i60. The spatial resolution remains consistent during the conversion to an interlaced format, allowing for direct digital to analog conversion for broadcast on analog TV networks.
Resolutions:
480p resolutions come in various formats: 480x480p (1:1) commonly used for Vine videos, 640x480p (4:3) typical for cameras and video formats, 720x480p (3:2) used on devices like iPod Touch 4 and NTSC-region DVDs, 768x480p (16:10), and 800x480p (5:3) seen on devices like Samsung Galaxy S II.
See Also:
For more information on ATSC standards, resolutions, and related topics, you can explore Enhanced-definition television (EDTV) and refer to a comprehensive list of common resolutions. Additional resources include best practices for multi-device transcoding, technology glossaries, and standards such as MPEG-4 AVC, DVB, and ATSC A/72. Audio formats like AC-3 (5.1) and its applications in networks like China’s DVB-S/S2 are also relevant in this context.