720p: Difference between revisions
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'''720p''' (720 lines progressive) is a progressive [[High-definition television|HD]] signal format with 720 horizontal lines/1280 columns and an [[aspect ratio (image)|aspect ratio]] (AR) of [[16:9 aspect ratio|16:9]], normally known as widescreen HD (1.78:1). All major HD broadcasting standards (such as [[SMPTE 292|SMPTE 292M]]) include a 720p format, which has a resolution of 1280×720. | '''720p''' (720 lines progressive) is a progressive [[High-definition television|HD]] signal format with 720 horizontal lines/1280 columns and an [[aspect ratio (image)|aspect ratio]] (AR) of [[16:9 aspect ratio|16:9]], normally known as widescreen HD (1.78:1). All major HD broadcasting standards (such as [[SMPTE 292|SMPTE 292M]]) include a 720p format, which has a resolution of 1280×720. | ||
The number ''720'' stands for the 720 horizontal [[scan line]]s of image [[display resolution]] (also known as 720 pixels of vertical resolution).<ref>{{Cite web |url=http://www.afterdawn.com/glossary/term.cfm/720p |title=720p – AfterDawn: Glossary of technology terms & acronyms}}</ref> The ''p'' stands for [[progressive scan]], i.e. non-interlaced. When broadcast at 60{{refn|It is, however, more commonly broadcast at (60/1.001), or precisely 59.{{overline| | The number ''720'' stands for the 720 horizontal [[scan line]]s of image [[display resolution]] (also known as 720 pixels of vertical resolution).<ref>{{Cite web |url=http://www.afterdawn.com/glossary/term.cfm/720p |title=720p – AfterDawn: Glossary of technology terms & acronyms}}</ref> The ''p'' stands for [[progressive scan]], i.e. non-interlaced. When broadcast at 60{{refn|It is, however, more commonly broadcast at (60/1.001), or precisely 59.{{overline|94005994}}, matching the NTSC SDTV field rate; this and the 50.00 Hz of PAL are still the second and third highest standard framerates.<ref>{{cite web |url=https://www.tvtechnology.com/.amp/opinions/will-the-end-of-ntsc-be-the-end-of-5994 |title=Will the End of NTSC Be the End of 59.94? |publisher=TVTechnology |date=2008-01-09 |access-date=2010-10-08 |first=Randy |last=Hoffner}}</ref>|group=note}} frames per second, 720p features the highest [[temporal resolution]] possible under the [[ATSC standards|ATSC]] and [[DVB]] standards. The term assumes a [[widescreen]] [[Aspect ratio (image)|aspect ratio]] of [[16:9 aspect ratio|16:9]], thus implying a resolution of 1280×720 [[pixel|px]] (0.9 [[Pixel#Megapixel|megapixels]]). | ||
720i (720 lines [[Interlaced video|interlaced]]) is an erroneous term found in numerous sources and publications. Typically, it is a typographical error in which the author is referring to the 720p HDTV format. However, in some cases it is incorrectly presented as an actual alternative format to 720p.<ref>{{cite book |title=HDTV for Dummies |last=Briere |first=Daniel |author2=Patrick Hurley |year=2006 |page=13 |url=https://books.google.com/books?id=Jb62Hkrj0oYC&q=hdtv+for+dummies |publisher=[[For Dummies]] |isbn=9780470096734}}</ref> No proposed or existing broadcast standard permits 720 ''interlaced'' lines in a video frame at any frame rate.<ref>{{cite web |url=http://www.atsc.org/cms/standards/a72/a_72_part_1.pdf |title=ATSC Standard: Video System Characteristics of AVC in the ATSC Digital Television System |date=2008-07-29 |access-date=2011-07-24 |url-status=dead |archive-url=https://web.archive.org/web/20121004122811/http://www.atsc.org/cms/standards/a72/a_72_part_1.pdf |archive-date=2012-10-04}}</ref> | 720i (720 lines [[Interlaced video|interlaced]]) is an erroneous term found in numerous sources and publications. Typically, it is a typographical error in which the author is referring to the 720p HDTV format. However, in some cases it is incorrectly presented as an actual alternative format to 720p.<ref>{{cite book |title=HDTV for Dummies |last=Briere |first=Daniel |author2=Patrick Hurley |year=2006 |page=13 |url=https://books.google.com/books?id=Jb62Hkrj0oYC&q=hdtv+for+dummies |publisher=[[For Dummies]] |isbn=9780470096734}}</ref> No proposed or existing broadcast standard permits 720 ''interlaced'' lines in a video frame at any frame rate.<ref>{{cite web |url=http://www.atsc.org/cms/standards/a72/a_72_part_1.pdf |title=ATSC Standard: Video System Characteristics of AVC in the ATSC Digital Television System |date=2008-07-29 |access-date=2011-07-24 |url-status=dead |archive-url=https://web.archive.org/web/20121004122811/http://www.atsc.org/cms/standards/a72/a_72_part_1.pdf |archive-date=2012-10-04}}</ref> | ||
Latest revision as of 07:25, 25 July 2025
720p (720 lines progressive) is a progressive HD signal format with 720 horizontal lines/1280 columns and an aspect ratio (AR) of 16:9, normally known as widescreen HD (1.78:1). All major HD broadcasting standards (such as SMPTE 292M) include a 720p format, which has a resolution of 1280×720.
The number 720 stands for the 720 horizontal scan lines of image display resolution (also known as 720 pixels of vertical resolution).[1] The p stands for progressive scan, i.e. non-interlaced. When broadcast at 60Template:Refn frames per second, 720p features the highest temporal resolution possible under the ATSC and DVB standards. The term assumes a widescreen aspect ratio of 16:9, thus implying a resolution of 1280×720 px (0.9 megapixels).
720i (720 lines interlaced) is an erroneous term found in numerous sources and publications. Typically, it is a typographical error in which the author is referring to the 720p HDTV format. However, in some cases it is incorrectly presented as an actual alternative format to 720p.[2] No proposed or existing broadcast standard permits 720 interlaced lines in a video frame at any frame rate.[3]
Comparison with interlace scanning
Progressive scanning reduces the need to prevent flicker by anti-aliasing single high contrast horizontal lines.[4][5] It is also easier to perform high-quality 50↔60 Hz conversion and slow-motion clips with progressive video.
Resolutions
| Standard | Resolution | Aspect ratio |
|---|---|---|
| HD | 960×720p | Template:Ratio |
| HD | 720×960p | Template:Ratio |
| HD | 1280×720p | Template:Ratio |
| HD | 720×1280p | Template:Ratio |
Notes
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See also
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References
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External links
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