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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
Neymar vs Nantes (Home) HD 1080i (18/11/2017)
Neymar vs Nantes (Home) HD 1080i (18/11/2017)
Published: 2017/11/18
Channel: NJR10HD
1080p VS. 1080i
1080p VS. 1080i
Published: 2015/04/02
Channel: MakingUFeel
Piotr Zieliński vs AC Milan Home HD 1080i (18/11/2017)
Piotr Zieliński vs AC Milan Home HD 1080i (18/11/2017)
Published: 2017/11/19
Channel: danil7prod
Lionel Messi vs Leganes (Away) 2017-18 HD 1080i
Lionel Messi vs Leganes (Away) 2017-18 HD 1080i
Published: 2017/11/19
Channel: Raheem Comps
1080p или 1080i?
1080p или 1080i?
Published: 2016/09/13
Channel: Сними кино!
Balde Keita vs Amiens 1080i HD (17/11/2017)
Balde Keita vs Amiens 1080i HD (17/11/2017)
Published: 2017/11/17
Channel: Dream Team
Neymar vs Nantes Home HD 1080i (18/11/2017) by MNcomps
Neymar vs Nantes Home HD 1080i (18/11/2017) by MNcomps
Published: 2017/11/19
Channel: MNcompsJR
Lionel Messi vs Leganes (Away) 18/11/2017 HD 1080i - English Commentary
Lionel Messi vs Leganes (Away) 18/11/2017 HD 1080i - English Commentary
Published: 2017/11/20
Channel: SH10Comps
Neymar vs England Away HD 1080i (14/11/2017) by MNcomps
Neymar vs England Away HD 1080i (14/11/2017) by MNcomps
Published: 2017/11/20
Channel: MNcompsJR
Marc-André Ter Stegen Vs CD Leganes (Away) 2017-18 HD 1080i
Marc-André Ter Stegen Vs CD Leganes (Away) 2017-18 HD 1080i
Published: 2017/11/20
Channel: Rahim Abdullaev
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
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
Gabriel Jesus vs Burnley Home (21/10/2017) HD 1080i
Gabriel Jesus vs Burnley Home (21/10/2017) HD 1080i
Published: 2017/11/19
Channel: GabrielJesus33i
Neymar vs Nantes Home HD 1080i (18/11/2017) by MNcomps
Neymar vs Nantes Home HD 1080i (18/11/2017) by MNcomps
Published: 2017/11/18
Channel: MNcompsJR
Cristiano Ronaldo Vs Atletico Madrid Away HD 1080i (18/11/2017)
Cristiano Ronaldo Vs Atletico Madrid Away HD 1080i (18/11/2017)
Published: 2017/11/19
Channel: Anass Teaser
Paulinho vs Leganes 1080i HD (18/11/2017)
Paulinho vs Leganes 1080i HD (18/11/2017)
Published: 2017/11/18
Channel: Dream Team
Gianluigi Donnarumma Vs Napoli (Away) 2017-18 HD 1080i
Gianluigi Donnarumma Vs Napoli (Away) 2017-18 HD 1080i
Published: 2017/11/20
Channel: Rahim Abdullaev
Isco vs Atletico Madrid 1080i HD (18/11/2017)
Isco vs Atletico Madrid 1080i HD (18/11/2017)
Published: 2017/11/18
Channel: Dream Team
1080i vs 1080p on Vimeo.flv
1080i vs 1080p on Vimeo.flv
Published: 2011/05/12
Channel: lucky2642
Gabriel Jesus vs Arsenal Home (05/11/2017) HD 1080i
Gabriel Jesus vs Arsenal Home (05/11/2017) HD 1080i
Published: 2017/11/18
Channel: GabrielJesus33i
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
AULA GRÁTIS: Processamento de imagem
AULA GRÁTIS: Processamento de imagem
Published: 2015/08/22
Channel: Lord
В двух словах: 1080p и 1080i - в чем разница?
В двух словах: 1080p и 1080i - в чем разница?
Published: 2016/11/16
Channel: ТехноFAQ
Gabriel Jesus vs Stoke City Home (14/10/2017) HD 1080i
Gabriel Jesus vs Stoke City Home (14/10/2017) HD 1080i
Published: 2017/11/16
Channel: GabrielJesus33i
16 Years Old Kylian Mbappé vs Tottenham HD 1080i (10/12/2015) by MNcomps
16 Years Old Kylian Mbappé vs Tottenham HD 1080i (10/12/2015) by MNcomps
Published: 2017/11/17
Channel: MNcompsJR
Kurt Zouma vs Brighton 20/11/2017 HD 1080i
Kurt Zouma vs Brighton 20/11/2017 HD 1080i
Published: 2017/11/21
Channel: TIGGZ
Fernando Torres vs Real Madrid Home 17-18 HD 1080i
Fernando Torres vs Real Madrid Home 17-18 HD 1080i
Published: 2017/11/19
Channel: Torres comps
Progressive vs Interlaced Scan (1080P vs 1080i)
Progressive vs Interlaced Scan (1080P vs 1080i)
Published: 2017/03/25
Channel: RPM Tech Tips
Cristiano Ronaldo Vs Real Betis Away HD 1080i (18/01/2014)
Cristiano Ronaldo Vs Real Betis Away HD 1080i (18/01/2014)
Published: 2017/11/20
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
Dani Ceballos vs Slovakia U21 Home HD 1080i (14/11/2017) - English Commentary
Dani Ceballos vs Slovakia U21 Home HD 1080i (14/11/2017) - English Commentary
Published: 2017/11/15
Channel: MadridistaTV
Fernando Torres vs Real Madrid (H) 17-18 HD 1080i (18/11/2017) by DIPcomps
Fernando Torres vs Real Madrid (H) 17-18 HD 1080i (18/11/2017) by DIPcomps
Published: 2017/11/18
Channel: DIPcomps
Vinícius Júnior vs Coritiba HD 1080i (16/11/2017)
Vinícius Júnior vs Coritiba HD 1080i (16/11/2017)
Published: 2017/11/17
Channel: VGcomps
Tóth János 1 évad 36.rész HD 1080i
Tóth János 1 évad 36.rész HD 1080i
Published: 2017/11/17
Channel: Raptor Dr
Neymar vs Japan (Friendly) HD 1080i (10/11/2017) - English Commentary
Neymar vs Japan (Friendly) HD 1080i (10/11/2017) - English Commentary
Published: 2017/11/12
Channel: MNcompsJR
Nelson Semedo vs Leganes 1080i HD (18/11/2017)
Nelson Semedo vs Leganes 1080i HD (18/11/2017)
Published: 2017/11/18
Channel: Dream Team
Coldplay Live 1080i
Coldplay Live 1080i
Published: 2012/02/20
Channel: these7enstar
Paul Pogba vs Basel (Home) 17-18 HD 1080i - English Commentary
Paul Pogba vs Basel (Home) 17-18 HD 1080i - English Commentary
Published: 2017/11/17
Channel: Kyliann22Second
720p vs 1080i HD Explained (HQ)
720p vs 1080i HD Explained (HQ)
Published: 2012/05/08
Channel: kasper933
Gabriel Jesus vs Napoli Home (17/10/2017) HD 1080i
Gabriel Jesus vs Napoli Home (17/10/2017) HD 1080i
Published: 2017/11/17
Channel: GabrielJesus33i
Playstation 2 480i vs 1080i
Playstation 2 480i vs 1080i
Published: 2014/10/10
Channel: Matheus Galli Lalli
Interlaced vs. Progressive Scan - 1080i vs. 1080p  in hindi
Interlaced vs. Progressive Scan - 1080i vs. 1080p in hindi
Published: 2017/05/18
Channel: GEEKY SOUMYA
Kevin Trapp Vs France (Home) Friendly Match 2017 HD 1080i
Kevin Trapp Vs France (Home) Friendly Match 2017 HD 1080i
Published: 2017/11/18
Channel: Rahim Abdullaev
Luka Modric vs Greece 1080i HD (09/11/2017)
Luka Modric vs Greece 1080i HD (09/11/2017)
Published: 2017/11/10
Channel: Dream Team
David De Gea Vs Russia (Away) Friendly Match 2017 HD 1080i
David De Gea Vs Russia (Away) Friendly Match 2017 HD 1080i
Published: 2017/11/16
Channel: Rahim Abdullaev
Alvaro Morata vs Costa Rica (Friendly) 11/11/2017 HD 1080i
Alvaro Morata vs Costa Rica (Friendly) 11/11/2017 HD 1080i
Published: 2017/11/12
Channel: Shpendi10CFC
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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 on inexpensive models.

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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