576p
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576pis the shorthand name for a video display resolution. Thepstands forprogressive scan,i.e. non-interlaced,the576for a vertical resolution of 576pixels(theframe ratecan be given explicitly after the letter).[1][2]Usually it corresponds to a digital video mode with a 4:3anamorphic resolutionof 720x576 and aframe rateof 25 frames per second (576p25), and thus using the same bandwidth and carrying the same amount of pixel data as576i,but other resolutions and frame rates are possible.[2][3]
ITU-RRecommendation BT.1358 allows the following resolutions, coded asR'G'B'orYCBCR,with timings compatible withBT.656:[4][2][3]
- 1024 x 576p (16:9square pixelformat)
- 960 x 576p
- 768 x 576p (4:3square pixel format)
- 720 x 576p (4:3anamorphic)
- 704 x 576p (based on 720 x 576p, blanking the first and last 8 pixels of each line)
- 544 x 576p
- 480 x 576p
576p is consideredstandard definitionforPAL regions.It can be transported by both majordigital televisionformats (ATSCandDVB) and onDVD-Video(if limited to 25 fps). It is defined as a validenhanced-definition televisionresolution in theSMPTEstandard344M.[5]SMPTE 344M defines a 576p50 standard with twice the data rate ofBT.601,using 704 × 576 active pixels with 16 x 576 horizontal blanking pixels.
PAL
[edit]This resolution can be also named asPAL,for example in the context home video[6][7]or gaming consoles,[8][9]because of its relation with the analog color system using a similar number of scanlines. But 576p can be used to generate bothPALorSECAMinterlaced analog signals (where both interlaced fields correspond to a unique frame).
576p50
[edit]With doubled temporal resolution,576p50is consideredenhanced-definition television(EDTV), regardless of the image being scaled the same way as an interlaced frame. In some countries, such asAustralia,the 576p resolution standard is technically considered high-definition[10][11]and was in use by theSpecial Broadcasting Service(SBS TV), eventually replaced by720pfor its high-definitionsubchannel;SBS later changed to using1080i.TheSeven Networkinitially used 576p for its high-definition subchannel, but now uses1080iinstead.
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. Widescreen16:9material has only the width scaled down to fit 720 pixels instead of an unscaled 1024 width.
See also
[edit]
- Enhanced-definition television(EDTV)
- List of common resolutions
- 4320p,2160p,1080p,1080i,720p,576i,480p,480i,360p,288p,240p
- WSVGA,the associated computer display resolution
References
[edit]- ^AfterDawn.com."576p - AfterDawn: Glossary of technology terms & acronyms".
- ^abcJack, Keith (June 19, 2005).Video Demystified: A Handbook for the Digital Engineer.Newnes.ISBN9780750678223– via Google Books.
- ^abJack, Keith (October 7, 2008).Digital Video and DSP: Instant Access.Newnes.ISBN9780080560120– via Google Books.
- ^Recommendation ITU-R BT.1358-1 - Studio parameters of 625 and 525 line progressive television systems(PDF).ITU-R. 2007.
- ^Poynton, Charles (2003).Digital Video and HD: Algorithms and Interfaces.ISBN9781558607927.
- ^"Digit".IDG Communications. June 19, 2004 – via Google Books.
- ^Magazines, S. P. H. (February 19, 2007)."HWM".SPH Magazines – via Google Books.
- ^Johnson, Brian; Mackenzie, Duncan (January 31, 2006).Xbox 360?For Dummies.John Wiley & Sons.ISBN9780471771807– via Google Books.
- ^"PS3 | Video Output Settings".manuals.playstation.net.
- ^"Buying guide: TVs - Good Gear Guide Australia".www.goodgearguide.com.au.
- ^"Digital Television - Who's Buying it? Chapter 4: Content and quality"(PDF).Parliament of Australia.p. 134.