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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
Nelson Semedo vs Eibar 1080i HD Home (19/09/2017)
Nelson Semedo vs Eibar 1080i HD Home (19/09/2017)
Published: 2017/09/19
Channel: Dream Team
Paulo Henrique Ganso vs Las Palmas HD 1080i (20/09/2017)
Paulo Henrique Ganso vs Las Palmas HD 1080i (20/09/2017)
Published: 2017/09/21
Channel: VGcomps
Tiemoue Bakayoko vs Nottingham Forest (Home) 20/09/2017 HD 1080i
Tiemoue Bakayoko vs Nottingham Forest (Home) 20/09/2017 HD 1080i
Published: 2017/09/21
Channel: Shpendi10CFC
Robert Kenedy vs Nottingham Forest (Home) 20/09/2017 HD 1080i
Robert Kenedy vs Nottingham Forest (Home) 20/09/2017 HD 1080i
Published: 2017/09/21
Channel: Shpendi10CFC
Eden Hazard vs Nottingham Forest (Home) 20/09/2017 HD 1080i
Eden Hazard vs Nottingham Forest (Home) 20/09/2017 HD 1080i
Published: 2017/09/20
Channel: Shpendi10CFC
Ethan Ampadu vs Nottingham Forest (Chelsea Debut) HD 1080i
Ethan Ampadu vs Nottingham Forest (Chelsea Debut) HD 1080i
Published: 2017/09/20
Channel: Shpendi10CFC
Charly Musonda Jr vs Nottingham Forest (Home) 20/09/2017 HD 1080i
Charly Musonda Jr vs Nottingham Forest (Home) 20/09/2017 HD 1080i
Published: 2017/09/20
Channel: Shpendi10CFC
720p vs 1080i Comparison (Uncharted 2)
720p vs 1080i Comparison (Uncharted 2)
Published: 2013/02/03
Channel: therailwaywinds
Lionel Messi vs Eibar (Home) 19/09/2017 HD 1080i by SH10
Lionel Messi vs Eibar (Home) 19/09/2017 HD 1080i by SH10
Published: 2017/09/20
Channel: SH10Comps
Leroy Sané vs West Bromwich Albion (Away) 20/09/2017 HD 1080i
Leroy Sané vs West Bromwich Albion (Away) 20/09/2017 HD 1080i
Published: 2017/09/21
Channel: -dn10HD
Neymar vs Olympique Lyon Home HD 1080i (17/09/2017) by MNcomps
Neymar vs Olympique Lyon Home HD 1080i (17/09/2017) by MNcomps
Published: 2017/09/18
Channel: MNcompsJR
Denis Suarez vs Eibar 1080i HD Home (19/09/2017)
Denis Suarez vs Eibar 1080i HD Home (19/09/2017)
Published: 2017/09/20
Channel: Dream Team
Cristiano Ronaldo vs Real Betis HD 1080i Home (20/09/2017)
Cristiano Ronaldo vs Real Betis HD 1080i Home (20/09/2017)
Published: 2017/09/21
Channel: Nino Productions
Neymar vs Lyon Home HD 1080i (17/09/2017) - English Commentary
Neymar vs Lyon Home HD 1080i (17/09/2017) - English Commentary
Published: 2017/09/19
Channel: MNcompsJR
Kylian Mbappé vs Olympique Lyon Home HD 1080i (17/09/2017) by MNcomps
Kylian Mbappé vs Olympique Lyon Home HD 1080i (17/09/2017) by MNcomps
Published: 2017/09/18
Channel: MNcompsJR
1080p VS. 1080i
1080p VS. 1080i
Published: 2015/04/02
Channel: MakingUFeel
Neymar & Mbappe vs Lyon (Home) HD 1080i Crazy Duo! (17/09/2017)
Neymar & Mbappe vs Lyon (Home) HD 1080i Crazy Duo! (17/09/2017)
Published: 2017/09/17
Channel: Wrsh98
Lionel Messi vs Eibar (Home) 2017-18 HD 1080i
Lionel Messi vs Eibar (Home) 2017-18 HD 1080i
Published: 2017/09/20
Channel: Raheem Comps
Marc Andre Ter Stegen Vs Getafe (Away) 2017-18 HD 1080i
Marc Andre Ter Stegen Vs Getafe (Away) 2017-18 HD 1080i
Published: 2017/09/19
Channel: Rahim Abdullaev
Resolução: 1080i ou 720p? Qual é melhor?
Resolução: 1080i ou 720p? Qual é melhor?
Published: 2013/04/10
Channel: FELIPESCHIRMER
Paulo Henrique Ganso vs Girona HD 1080i (17/09/2017)
Paulo Henrique Ganso vs Girona HD 1080i (17/09/2017)
Published: 2017/09/17
Channel: VGcomps
1080p или 1080i?
1080p или 1080i?
Published: 2016/09/13
Channel: Сними кино!
Pepe vs FC Porto (Away) UCL 17-18 1080i HD [Turkish Commentary]
Pepe vs FC Porto (Away) UCL 17-18 1080i HD [Turkish Commentary]
Published: 2017/09/19
Channel: HaiNam Football
Paulo Dybala vs Sassuolo Away HD 1080i (17/09/2017)
Paulo Dybala vs Sassuolo Away HD 1080i (17/09/2017)
Published: 2017/09/17
Channel: AshComps7
Lionel Messi vs Getafe (Away) 16/09/2017 HD 1080i by SH10
Lionel Messi vs Getafe (Away) 16/09/2017 HD 1080i by SH10
Published: 2017/09/16
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
Nemanja Matic vs Everton (Home) 17/09/2017 HD 1080i
Nemanja Matic vs Everton (Home) 17/09/2017 HD 1080i
Published: 2017/09/17
Channel: SH10Comps
Ricardo Quaresma vs Konyaspor -Home- 18/09/2017-HD 1080i
Ricardo Quaresma vs Konyaspor -Home- 18/09/2017-HD 1080i
Published: 2017/09/19
Channel: MarYo
Marco Asensio vs Real Betis Home (20/09/2017) HD 1080i
Marco Asensio vs Real Betis Home (20/09/2017) HD 1080i
Published: 2017/09/21
Channel: Match Center
Jan Oblak Vs Valencia (Away) 2017-18 HD 1080i
Jan Oblak Vs Valencia (Away) 2017-18 HD 1080i
Published: 2017/09/19
Channel: Rahim Abdullaev
Alexis Sanchez vs Chelsea Away HD 1080i (17-09-2017).mp4
Alexis Sanchez vs Chelsea Away HD 1080i (17-09-2017).mp4
Published: 2017/09/17
Channel: SKY ViDeOs
Borja Mayoral vs Real Betis Home (20/09/2017) HD 1080i By MatchCenter
Borja Mayoral vs Real Betis Home (20/09/2017) HD 1080i By MatchCenter
Published: 2017/09/21
Channel: Match Center
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
Gerard Pique vs Eibar (Home) LaLiga 17-18 1080i HD
Gerard Pique vs Eibar (Home) LaLiga 17-18 1080i HD
Published: 2017/09/20
Channel: HaiNam Football
Gerard Deulofeu vs Eibar 1080i HD Home (19/09/2017)
Gerard Deulofeu vs Eibar 1080i HD Home (19/09/2017)
Published: 2017/09/20
Channel: Sport Football
Philippe Coutinho vs Leicester City HD 1080i (19/09/2017)
Philippe Coutinho vs Leicester City HD 1080i (19/09/2017)
Published: 2017/09/20
Channel: AshComps7
Lionel Messi vs Getafe (Away) 2017-18 HD 1080i
Lionel Messi vs Getafe (Away) 2017-18 HD 1080i
Published: 2017/09/17
Channel: Raheem Comps
Real Madrid vs Real Betis 2-1 - La Liga 2016/2017 - Highlights HD 1080i
Real Madrid vs Real Betis 2-1 - La Liga 2016/2017 - Highlights HD 1080i
Published: 2017/09/20
Channel: GugaTV
Ousmane Dembélé vs Getafe (Away) 17-18 HD 1080i - English Commentary
Ousmane Dembélé vs Getafe (Away) 17-18 HD 1080i - English Commentary
Published: 2017/09/17
Channel: Kyliann22Second
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
Ryad Boudebouz Vs Deportivo La Corogne 16/09/2017 (Debut) 1080i HD
Ryad Boudebouz Vs Deportivo La Corogne 16/09/2017 (Debut) 1080i HD
Published: 2017/09/16
Channel: BHMDz Production
Lionel Messi vs Eibar 1080i HD Home (19/09/2017)
Lionel Messi vs Eibar 1080i HD Home (19/09/2017)
Published: 2017/09/19
Channel: Dream Team
Alvaro Morata vs Arsenal (Home) 17/09/2017 HD 1080i
Alvaro Morata vs Arsenal (Home) 17/09/2017 HD 1080i
Published: 2017/09/17
Channel: Shpendi10CFC
В двух словах: 1080p и 1080i - в чем разница?
В двух словах: 1080p и 1080i - в чем разница?
Published: 2016/11/16
Channel: ТехноFAQ
Jan Oblak Vs Malaga (Home) 2017-18 HD 1080i
Jan Oblak Vs Malaga (Home) 2017-18 HD 1080i
Published: 2017/09/19
Channel: Rahim Abdullaev
AULA GRÁTIS: Processamento de imagem
AULA GRÁTIS: Processamento de imagem
Published: 2015/08/22
Channel: Lord
Paulinho vs Getafe (Away) 16/09/2017 HD 1080i
Paulinho vs Getafe (Away) 16/09/2017 HD 1080i
Published: 2017/09/16
Channel: SH10Comps
Ousmane Dembele vs Getafe 1080i HD (16/09/2017)
Ousmane Dembele vs Getafe 1080i HD (16/09/2017)
Published: 2017/09/16
Channel: Dream Team
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WIKIPEDIA ARTICLE

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1080i (a.k.a. FHD and 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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