576p

576p is the shorthand name for a video display resolution. The p stands for progressive scan, i.e. non-interlaced, the 576 for a vertical resolution of 576 pixels, usually with a horizontal resolution of 720 or 704 pixels. The frame rate can be given explicitly after the letter.[1]

Resolution Pixels

16:9 576p= 1024x576, 4:3 576p= 768x576, 3:2 576p= 864x576.

Lines scanning

i: Interlaced scan 576i p: Progressive scan 576p. Only on PAL

576p25

576p25 has a frame rate of 25 frames per second, and thus uses the same bandwidth and carries the same amount of pixel data as 576i; as such, 576p25 is considered to be standard definition. It can be used on analog PAL or SECAM systems, where it may be transported as a 576i signal with both interlaced fields corresponding to a unique frame. PALplus supports it via a "movie" mode signal flag. It can also be transported by both major digital television formats, ATSC and DVB, and on DVD.

576p50

With doubled temporal resolution, 576p50 is considered enhanced-definition television (EDTV), regardless of the image being scaled the same way as an interlaced frame. In some countries, such as Australia, the 576p resolution standard is technically considered high-definition and was in use by the Special Broadcasting Service (SBS TV) (16:9 the format has aspect ratio 1.468), eventually replaced by 720p for its high-definition subchannel; SBS later changed to using 1080i. The Seven Network initially used 576p for its high-definition subchannel, but now uses 1080i instead.

The frames are doubled (from a 25 frame source) on broadcast (to avoid flicker) for display devices that lack any kind of frame doubling ability. Widescreen 16:9 material has only the width scaled down to fit 720 pixels instead of an unscaled 1024 width. SMPTE 344M defines a 576p50 standard with twice the data rate of BT.601, using 704 × 576 active pixels with 16 x 576 horizontal blanking pixels.

gollark: The thing which makes it monady is that you can do `x >>= f`, which in this case takes a `Maybe` x, and if it is `Just a`, passes that `a` to `f`, which then returns another `Maybe`.
gollark: Anyway, ignoring LyricLy, the bee entity: `Maybe` can be `Just x`, representing that it has an x, or `Nothing`, representing that it contains *no* x. You can do `return`/`pure`, which gives you a `Just x` for any `x`.
gollark: Or possibly binary. Something like that.
gollark: Those are different, I think it just means "Unary operator" in APL.
gollark: `IO` is just `State` but it stores the entire real world.

See also

Television

References
  1. AfterDawn.com. "576p - AfterDawn: Glossary of technology terms & acronyms".
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