Editing Progressive scan (section)

==Usage in TVs, video projectors, and monitors==
Progressive scan is used for all LCD computer monitors and most [[High-definition television|HDTVs]]. Most [[cathode-ray tube]] (CRT) [[computer monitor]]s and CRT-type displays, such as [[Standard-definition television|SDTVs]], needed to use interlace to achieve full vertical resolution, but could display progressive video at the cost of halving the vertical resolution. Before HDTV became common, some [[television]]s and video projectors were produced with one or more full-resolution progressive-scan inputs, allowing these displays to take advantage of formats like [[PALPlus]], [[progressive scan DVD player]]s, and certain video game consoles. Early HDTVs supported the progressively-scanned resolutions of 480p and 720p with [[1080p]] displays available at higher cost. At the debut of [[Ultra-high-definition television|UHD]], TVs had emerged on the consumer market in the 2010s, also using progressive resolutions, but usually sold with prohibitive prices<ref name="pricing uhd tvs">[[4K resolution|4k resolution wikipedia page]], that includes a table of 4k display devices with their corresponding prices. Retrieved 29 May 2013.</ref> ([[4K resolution|4K HDTVs]]) or were still in prototype stage ([[8K resolution|8K HDTVs]]).<ref name="sharp first 8k tv">[http://www.techradar.com/news/television/hdtv/sharp-dazzles-with-8k-tv-prototype-vp-says-production-about-4-years-off-1124330 Sharp 8k TV launch], Displayed at CES 2013, the Sharp 8k UHD TV. Retrieved 29 May 2013.</ref> Prices for consumer-grade 4K HDTVs have since lowered and become more affordable, which has increased their prevalence amongst consumers. Computer monitors can use even greater [[display resolution]]s.

The disadvantage of progressive scan is that it requires higher bandwidth than interlaced video that has the same frame size and [[Refresh rate|vertical refresh rate]]. Because of this 1080p is not used for broadcast.<ref name="tph">{{cite book |title=Television Production Handbook |last=Zettl |first=Herbert |year=2011 |publisher=Cengage Learning |isbn=978-0495898849 |page=94 |url=https://books.google.com/books?id=rNhWA5g1LN4C |access-date=27 January 2013 }}</ref>{{Obsolete source|reason=Dated to 2011, but over the last 10 years the communications industry modernized a lot so that i don't think it really applies anymore|date=July 2021}} For explanations of why interlacing was originally used, see [[interlaced video]]. For an in-depth explanation of the fundamentals and advantages/disadvantages of converting interlaced video to a progressive format, see [[deinterlacing]].

===Advantages===
The main advantage with progressive scan is that motion appears smoother and more realistic.<ref name="diov">{{cite book |title=Digital Overdrive: Communications & Multimedia Technology 2011 |last=Andrews |first=Dale |year=2011 |publisher=Digital Overdrive |isbn=978-1897507018 |page=24 |url=https://books.google.com/books?id=Wj_UYxxaKqcC |access-date=27 January 2013 }}</ref> There is an absence of visual artifacts associated with interlaced video of the same line rate, such as interline twitter. Frames have no interlace artifacts and can be captured for use as still photos. With progressive scan there is no need to introduce intentional blurring (sometimes referred to as anti-aliasing) to reduce interline twitter and eye strain.

In the case of most media, such as DVD movies and video games, the video is blurred during the authoring process itself to subdue interline twitter when played back on interlaced displays. As a consequence, recovering the sharpness of the original video is impossible when the video is viewed progressively. A user-intuitive solution to this is when display hardware and video games come equipped with options to blur the video at will, or to keep it at its original sharpness. This allows the viewer to achieve the desired image sharpness with both interlaced and progressive displays.

Progressive scan also offers clearer and faster results for scaling to higher resolutions than its equivalent interlaced video, such as upconverting 480p to display on a 1080p HDTV. HDTVs not based on [[Cathode-ray tube|CRT]] technology cannot natively display interlaced video, therefore interlaced video must be [[deinterlacing|deinterlaced]] before it is scaled and displayed. Deinterlacing can result in noticeable [[Deinterlacing#Deinterlacing methods|visual artifacts]] and/or [[input lag]] between the video source and the display device.