576i

From Wikipedia, the free encyclopedia

576i is a standard-definition video mode used in (former) PAL and SECAM countries, and is the digital equivalent of the analogue PAL and SECAM systems.

The 576 identifies a vertical resolution of 576 lines (usually with a horizontal resolution of 720 or 704 pixels), and the i identifies it as an interlaced resolution. As some people prefer to identify an interlaced resolution by its number of field lines (rather than the number of frame lines), the format is also sometimes called 288i. Furthermore, the field rate (not to be confused with the frame rate), which is 50 Hz, is sometimes included when identifying the video mode, i.e. 576i50.

The video format can be transported by both major digital television formats, ATSC and DVB, and on DVD, and it supports aspect ratios of standard 4:3 and anamorphic 16:9.

v • d • e

Digital Video Resolutions

Designation

Usage Examples	Definition (lines)	Rate (Hz)
		Interlaced (fields)	Progressive (frames)

Low; MP@LL

LDTV, VCD

240; 288 (SIF)

24, 30; 25

Standard; MP@ML

SDTV, SVCD, DVD, DV	480 (NTSC, PAL-M)	60	24, 30
SDTV, SVCD, DVD, DV	576 (PAL, SECAM)	50	25

Enhanced

EDTV

480; 576

60; 50

High; MP@HL

HDTV, HD DVD, BD, HDV	720		24, 30, 60; 25, 50
HDTV, HD DVD, BD, HDV	1080	50, 60	24, 30; 25

Image:Common Video Resolutions 2.svg

This table illustrates total horizontal and vertical pixel resolution via box size. It does not accurately reflect the screen shape (aspect ratio) of these formats, which is either 4:3, or 16:9.

v • d • e

Broadcast video formats

Analog broadcast

525 lines: NTSC • NTSC-J • PAL-M

625 lines: PAL • PAL-N • PALplus • SECAM

Defunct systems: Pre-1940 • 405 lines • 819 lines • Baird-Nipkow • MAC • MUSE

Multichannel audio: BTSC (MTS) • NICAM-728 • Zweiton (A2, IGR) • EIAJ