The visual quality of content viewed on analogue televisions and, to a much lesser extent, video viewed on HDTVs is affected by the two types of colour encoding methods known as NTSC and PAL (High-Definition Television). While PAL employs a frame rate of 25 fps and a 720x576 aspect ratio, NTSC broadcasts at a rate of 30 fps at a resolution of 720x480.

In contrast to the physical colour correction used by NTSC, the PAL system transmits automatic colour correction. While PAL is more common in nations like the UK (United Kingdom), Australia, and Sweden, the NTSC standard is more prevalent in places like the US and Japan.