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Interlaced vs. Progressive Scan - 1080i vs. 1080p
Interlaced vs. Progressive Scan - 1080i vs. 1080p
Published: 2016/08/31
Channel: Techquickie
1080p vs 1080i
1080p vs 1080i
Published: 2013/07/27
Channel: Dans Tech
720p vs 1080i Comparison (Uncharted 2)
720p vs 1080i Comparison (Uncharted 2)
Published: 2013/02/03
Channel: therailwaywinds
1080p VS. 1080i
1080p VS. 1080i
Published: 2015/04/02
Channel: MakingUFeel
1080p или 1080i?
1080p или 1080i?
Published: 2016/09/13
Channel: Сними кино!
Gabriel Barbosa vs São Paulo HD 1080i (18/02/2018)
Gabriel Barbosa vs São Paulo HD 1080i (18/02/2018)
Published: 2018/02/23
Channel: VGcomps
720p 1080p vs 1080i Wo ist der Unterschied?!
720p 1080p vs 1080i Wo ist der Unterschied?!
Published: 2015/02/26
Channel: Speakershocker Hi-Fi Mehr als nur Technik
Vinícius Júnior vs Madureira HD 1080i (21/02/2018)
Vinícius Júnior vs Madureira HD 1080i (21/02/2018)
Published: 2018/02/22
Channel: VGcomps
Gerard Deulofeu vs EVE (Home) 2017/18 HD 1080i 24/02/2018
Gerard Deulofeu vs EVE (Home) 2017/18 HD 1080i 24/02/2018
Published: 2018/02/25
Channel: ASComps - Match Compilations
Cristiano Ronaldo vs Alaves Home HD 1080i (24/02/2018)
Cristiano Ronaldo vs Alaves Home HD 1080i (24/02/2018)
Published: 2018/02/24
Channel: AshStudio7
Philippe Coutinho vs Girona (Home) 24/02/2018 HD 1080i
Philippe Coutinho vs Girona (Home) 24/02/2018 HD 1080i
Published: 2018/02/25
Channel: SH10Comps
1080p和1080i 有什麼差別? | 一探啾竟 第3集 | 啾啾鞋
1080p和1080i 有什麼差別? | 一探啾竟 第3集 | 啾啾鞋
Published: 2017/04/22
Channel: 啾啾鞋
Resolução: 1080i ou 720p? Qual é melhor?
Resolução: 1080i ou 720p? Qual é melhor?
Published: 2013/04/10
Channel: FELIPESCHIRMER
В двух словах: 1080p и 1080i - в чем разница?
В двух словах: 1080p и 1080i - в чем разница?
Published: 2016/11/16
Channel: ТехноFAQ
Cristiano Ronaldo vs Real Betis Away HD 1080i (18/02/2018)
Cristiano Ronaldo vs Real Betis Away HD 1080i (18/02/2018)
Published: 2018/02/18
Channel: AshStudio7
Malcom vs Olympique de Marseille HD 1080i (18/02/2018)
Malcom vs Olympique de Marseille HD 1080i (18/02/2018)
Published: 2018/02/21
Channel: VGcomps
DGR Presents: Gran Turismo 4 on PlayStation 2 in 1080i mode
DGR Presents: Gran Turismo 4 on PlayStation 2 in 1080i mode
Published: 2015/02/27
Channel: Dave's Game Room
1080i vs 1080p on Vimeo.flv
1080i vs 1080p on Vimeo.flv
Published: 2011/05/12
Channel: lucky2642
Philippe Coutinho vs Eibar HD 1080i (17/02/2018)
Philippe Coutinho vs Eibar HD 1080i (17/02/2018)
Published: 2018/02/17
Channel: VGcomps
Vinícius Júnior vs Boavista HD 1080i (18/02/2018)
Vinícius Júnior vs Boavista HD 1080i (18/02/2018)
Published: 2018/02/18
Channel: VGcomps
Marc-André Ter Stegen Vs Chelsea (Away) UCL 2017-18 HD 1080i
Marc-André Ter Stegen Vs Chelsea (Away) UCL 2017-18 HD 1080i
Published: 2018/02/24
Channel: Rahim Abdullaev
Cristiano Ronaldo Vs Real Mallorca Home HD 1080i (13/05/2012)
Cristiano Ronaldo Vs Real Mallorca Home HD 1080i (13/05/2012)
Published: 2018/02/23
Channel: Anass Teaser
Neymar vs Strasbourg (Home) HD 1080i (17/02/2018) by MNcomps
Neymar vs Strasbourg (Home) HD 1080i (17/02/2018) by MNcomps
Published: 2018/02/18
Channel: MNcompsJR
Cristiano Ronaldo Vs Deportivo Alaves Home HD 1080i (24/02/2018)
Cristiano Ronaldo Vs Deportivo Alaves Home HD 1080i (24/02/2018)
Published: 2018/02/24
Channel: Anass Teaser
PROGRESIVO O ENTRELAZADO ¿CUAL ES MEJOR? || 1080P O 1080i || KEEP BATTERY #1 ||
PROGRESIVO O ENTRELAZADO ¿CUAL ES MEJOR? || 1080P O 1080i || KEEP BATTERY #1 ||
Published: 2016/08/20
Channel: W Tech
Messi Vs Real Zaragoza (H) 2011/12 - English Commentary HD 1080i
Messi Vs Real Zaragoza (H) 2011/12 - English Commentary HD 1080i
Published: 2018/02/21
Channel: UCCEV Comps
Dani Ceballos vs Deportivo Alaves Home (24/02/2018) 1080i
Dani Ceballos vs Deportivo Alaves Home (24/02/2018) 1080i
Published: 2018/02/24
Channel: ISC ANSEO
720p Vs. 1080i
720p Vs. 1080i
Published: 2012/03/16
Channel: FamilyofSnipers
Cristiano Ronaldo Vs PSG Home HD 1080i (14/02/2018)
Cristiano Ronaldo Vs PSG Home HD 1080i (14/02/2018)
Published: 2018/02/15
Channel: Anass Teaser
Memphis Depay vs LOSC Lille (Away) 2017/18 HD 1080i 18/02/2018
Memphis Depay vs LOSC Lille (Away) 2017/18 HD 1080i 18/02/2018
Published: 2018/02/23
Channel: ASComps - Match Compilations
Adama Traore vs Hull City (9.4/10 Whoscored) 2017/18 HD 1080i 20/02/2018
Adama Traore vs Hull City (9.4/10 Whoscored) 2017/18 HD 1080i 20/02/2018
Published: 2018/02/22
Channel: ASComps - Match Compilations
Neymar vs Nantes (Home) HD 1080i (18/11/2017)
Neymar vs Nantes (Home) HD 1080i (18/11/2017)
Published: 2017/11/18
Channel: NJR10HD
720p vs 1080i HD Explained (HQ)
720p vs 1080i HD Explained (HQ)
Published: 2012/05/08
Channel: kasper933
Différence entre 1080p vs 1080i
Différence entre 1080p vs 1080i
Published: 2015/04/19
Channel: J&J Tutorials
Cristiano Ronaldo ⚽ All Free Kicks Inside the Penalty Box ⚽ 2018 | HD 1080i #CristianoRonaldo
Cristiano Ronaldo ⚽ All Free Kicks Inside the Penalty Box ⚽ 2018 | HD 1080i #CristianoRonaldo
Published: 2018/02/21
Channel: StefanoBolis96
1080i vs. 720p Comparación
1080i vs. 720p Comparación
Published: 2014/03/08
Channel: Army Edits
Neymar vs Rennes Away HD 1080i (30/01/2018) by MNcomps
Neymar vs Rennes Away HD 1080i (30/01/2018) by MNcomps
Published: 2018/01/30
Channel: MNcompsJR
1080i vs 1080p [interlaced vs progressive] 1080p FULL HD
1080i vs 1080p [interlaced vs progressive] 1080p FULL HD
Published: 2010/05/23
Channel: Alberto De Santa
Neymar vs Dijon Home HD 1080i (17/01/2018) by MNcomps
Neymar vs Dijon Home HD 1080i (17/01/2018) by MNcomps
Published: 2018/01/17
Channel: MNcompsJR
Marco Reus vs Atalanta (Away) HD 1080i (22/02/2018)
Marco Reus vs Atalanta (Away) HD 1080i (22/02/2018)
Published: 2018/02/24
Channel: Reusko
Kingsley Coman vs Besiktas (Home) 2017/18 HD 1080i 20/02/2018
Kingsley Coman vs Besiktas (Home) 2017/18 HD 1080i 20/02/2018
Published: 2018/02/21
Channel: ASComps - Match Compilations
Cristiano Ronaldo vs Barcelona Away HD 1080i (13/08/2017) by 1900FCBFreak
Cristiano Ronaldo vs Barcelona Away HD 1080i (13/08/2017) by 1900FCBFreak
Published: 2017/08/15
Channel: 1900FCBFreak7
Neymar vs Dijon (Home) HD 1080i (17/01/2018) - English Commentary
Neymar vs Dijon (Home) HD 1080i (17/01/2018) - English Commentary
Published: 2018/01/24
Channel: MNcompsJR
Cristiano Ronaldo vs Real Betis Away HD 1080i (18/02/2018) by 1900FCBFreak
Cristiano Ronaldo vs Real Betis Away HD 1080i (18/02/2018) by 1900FCBFreak
Published: 2018/02/22
Channel: 1900FCBFreak7
Eden Hazard vs FC Barcelona 29/07/2015 - 1080i HD
Eden Hazard vs FC Barcelona 29/07/2015 - 1080i HD
Published: 2018/02/17
Channel: TIGGZ
Neymar vs Real Madrid (Home) HD 1080i (26/10/2013) by MNcomps
Neymar vs Real Madrid (Home) HD 1080i (26/10/2013) by MNcomps
Published: 2018/02/02
Channel: MNcompsJR
Neymar vs Lille (Away) HD 1080i (03/02/2018) by MNcomps
Neymar vs Lille (Away) HD 1080i (03/02/2018) by MNcomps
Published: 2018/02/03
Channel: MNcompsJR
Cristiano Ronaldo vs Athletic Bilbao Away HD 1080i (02/12/2017) by 1900FCBFreak
Cristiano Ronaldo vs Athletic Bilbao Away HD 1080i (02/12/2017) by 1900FCBFreak
Published: 2017/12/04
Channel: 1900FCBFreak7
Gareth Bale vs Deportivo Alaves Home (24/02/2018) 1080i
Gareth Bale vs Deportivo Alaves Home (24/02/2018) 1080i
Published: 2018/02/24
Channel: ISC ANSEO
Neymar vs Montpellier (Home) HD 1080i (27/01/2018)
Neymar vs Montpellier (Home) HD 1080i (27/01/2018)
Published: 2018/01/28
Channel: NJR10HD
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WIKIPEDIA ARTICLE

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1080i (also known as Full HD or BT.709) is an abbreviation referring to a combination of frame resolution and scan type, used in high-definition television (HDTV) and high-definition video. The number "1080" refers to the number of horizontal lines on the screen. The "i" is an abbreviation for "interlaced"; this indicates that only the odd lines, then the even lines of each frame (each image called a video field) are drawn alternately, so that only half the number of actual image frames are used to produce video. A related display resolution is 1080p, which also has 1080 lines of resolution; the "p" refers to progressive scan, which indicates that the lines of resolution for each frame are "drawn" in on the screen sequence.

The term assumes a widescreen aspect ratio of 16:9 (a rectangular TV that is wider than it is tall), so the 1080 lines of vertical resolution implies 1920 columns of horizontal resolution, or 1920 pixels × 1080 lines. A 1920 pixels × 1080 lines screen has a total of 2.1 megapixels (2.1 million pixels) and a temporal resolution of 50 or 60 interlaced fields per second. This format is used in the SMPTE 292M standard.

The choice of 1080 lines originates with Charles Poynton, who in the early 1990s pushed for "square pixels" to be used in HD video formats.[1]

Broadcast standard[edit]

An example frame of poorly deinterlaced video. Despite the fact that most TV transmissions are interlaced, plasma and LCD display technologies are progressively scanned. Consequently, flat-panel TVs convert an interlaced source to progressive scan for display, which can have an adverse impact on motion portrayal.

Within the designation "1080i", the i stands for interlaced scan. A frame of 1080i video consists of two sequential fields of 1920 horizontal and 540 vertical pixels. The first field consists of all odd-numbered TV lines and the second all even numbered lines. Consequently, the horizontal lines of pixels in each field are captured and displayed with a one-line vertical gap between them, so the lines of the next field can be interlaced between them, resulting in 1080 total lines. 1080i differs from 1080p, where the p stands for progressive scan, where all lines in a frame are captured at the same time. In native or pure 1080i, the two fields of a frame correspond to different instants (points in time), so motion portrayal is good (50 or 60 motion phases/second). This is true for interlaced video in general and can be easily observed in still images taken of fast motion scenes. However, when 1080p material is captured at 25 or 30 frames/second, it is converted to 1080i at 50 or 60 fields/second, respectively, for processing or broadcasting. In this situation both fields in a frame do correspond to the same instant. The field-to-instant relation is somewhat more complex for the case of 1080p at 24 frames/second converted to 1080i at 60 fields/second.

The field rate of 1080i is typically 60 Hz (i.e., 60 fields per second) for countries that use or used System M (NTSC and Brazilian PAL-M) as analog television system with 60 fields/sec (such as United States, Canada, Mexico, Japan, South Korea, Taiwan and Philippines), or 50 Hz for regions that use or used 625-lines (PAL or SECAM) television system with 50 fields/sec (such as most of Europe, most of Africa, China, India, Australia, New Zealand, Middle East, and others). Both field rates can be carried by major digital television broadcast formats such as ATSC, DVB, and ISDB-T International. The frame rate can be implied by the context, while the field rate is generally specified after the letter i, such as "1080i60". In this case 1080i60 refers to 60 fields per second. The European Broadcasting Union (EBU) prefers to use the resolution and frame rate (not field rate) separated by a slash, as in 1080i/30 and 1080i/25, likewise 480i/30 and 576i/25.[2] Resolutions of 1080i60 or 1080i50 often refers to 1080i/30 or 1080i/25 in EBU notation.

1080i is directly compatible with some CRT HDTVs on which it can be displayed natively in interlaced form, but for display on progressive-scan—e.g., most new LCD and plasma TVs, it must be deinterlaced. Depending on the television's video processing capabilities, the resulting video quality may vary, but may not necessarily suffer. For example, film material at 25fps may be deinterlaced from 1080i50 to restore a full 1080p resolution at the original frame rate without any loss. Preferably video material with 50 or 60 motion phases/second is to be converted to 50p or 60p before display.

Worldwide, most HD channels on satellite and cable broadcast in 1080i. In the United States, 1080i is the preferred format for most broadcasters, with Discovery Communications, Viacom, Time Warner, Comcast owned networks broadcasting in the format; along with most smaller broadcasters. Only 21st Century Fox-owned television networks and Disney-owned television networks, along with MLB Network and a few other cable networks use 720p as the preferred format for their networks; A+E Networks channels converted from 720p to 1080i sometime in 2013 due to acquired networks already transmitting in the 1080i format. Many ABC affiliates owned by Hearst Television and former Belo Corporation stations owned by TEGNA, along with some individual affiliates of those three networks, air their signals in 1080i and upscale network programming for master control and transmission purposes, as most syndicated programming and advertising is produced and distributed in 1080i, removing a downscaling step to 720p. This also allows local newscasts on these ABC affiliates to be produced in the higher resolution (especially for weather forecasting presentation purposes for map clarity) to match the picture quality of their 1080i competitors.

Some cameras and broadcast systems that use 1080 vertical lines per frame do not actually use the full 1920 pixels of a nominal 1080i picture for image capture and encoding. Common subsampling ratios include 3/4 (resulting in 1440x1080i frame resolution) and 1/2 (resulting in 960x1080i frame resolution). Where used, the lower horizontal resolution is scaled to capture and/or display a full-sized picture. Using half horizontal resolution and only one field of each frame (possibly with added anti-alias filtering or progressive capture) results in the format known as qHD, which has frame resolution 960x540 and 30 or 25 frames per second. Due to the chosen 16x16 pixel size for a compressed video packet known as a macroblock as used in ITU H.261 to H.264 video standards, a 1080 line video must be encoded as 1088 lines and cropped to 1080 by the de-compressor. The 720 line video format divides perfectly by 16 and therefore does not require any lines to be wasted.

See also[edit]

References[edit]

  1. ^ Poynton, Charles. "Charles Poynton – square pixels and 1080". Retrieved 2013-02-21. 
  2. ^ "High Definition (HD) Image Formats for Television Production," EBU-TECH 3299, EBU.UER, Geneva, January 2010, page 7

External links[edit]

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