Verdens frste 8K tv-kanal lanceres denne uge

27 Nov 2018 | Rasmus Larsen |

Japanske NHK lancerer den 1. december verdens frste 8K tv-kanal. Der skal sendes film som 2001: A Space Odyssey, videoer fra NASA, koncerter og andet indhold i 8K.

Som forberedelse til OL 2020 i Tokyo

Den japanske public service-udbyder NHK har udviklet 8K-billedteknologi siden 1995. Mlet har vret at blive klar til at sende OL 2020 i Tokyo i hjeste kvalitet. Selskabet lancerer nu BS8K kanalen som optakt til den store begivenhed.

NHKs BS8K tv-kanal vil sende 12 timer daligt. P lanceringsdagen vises 8K-optagelser af jorden, skabt af NASA p den internationale rumstation. Kanalen kommer desuden til at vise Stanley Kubricks 2001: A Space Odyssey i en restaureret 8K-udgave, som er skabt fra den originale 70mm filmrulle i samarbejde med Warner Bros.

- On the BS8K channel on December 1st, a landmark film in cinematic history, the science-fiction epic "2001: A Space Odyssey" will be broadcast, forklarer Yukinori Kida, Executive Director of Broadcasting, NHK. Although many films were shot in 35mm, this film which was made half a century ago, was one of the few shot in 70mm, the highest quality available at the time. NHK was the first in the world to request this film be converted to 8K. Warner Bros, which owns the film, scanned the original film negatives, repairing scratches and restoring the color, to convert it into 8K.

Andet indhold i 8K dkker over koncerter fra tre af verdens frende orkestre, herunder Vienna Philharmonic, optagelser fra kunstudstillinger som Louvre, live sumo-wrestling, dokumentarer ssom Treasures of Tutankhamun, tv-dramaer og naturprogrammer. I marts 2019 vil man sende en restaureret udgave af klassikeren My Fair Lady, som ligeledes er optaget p 70mm.


NHK 8K tv-kanal


Stadig lang vej endnu

Lanceringen af NHK BS8K er en milepl, men der er stadig lang vej endnu for alle involverede parter. Sharp og Samsung har lanceret de frste 8K-tv, men de er ikke kompatible med det 8K60-format, som NHK anvender. De er i stedet begrnset til 8K30. NHK har planer om at hve niveauet til 8K120 HDR.

Fr 8K kan blive en realitet hjemme i stuerne, skal forbrugerne investere i 8K-skrme med fuld HDMI 2.1. Disse skrme eksisterer ikke p nuvrende tidspunkt. Overgangen vil tage adskillige r og mske endnu lngere end overgangen til 4K. Det skyldes, at mange film og videoproduktioner kan genudgives i 4K baseret p den originale 35mm filmrulle, hvorimod 8K krver typisk 70mm eller optagelser skudt med nye digitale kameraer ssom RED. Netflixs Lost in Space er optaget i 7K med RED Helium-kameraet, men selskabet har endnu ikke annonceret planer om at tilbyde i den hje oplsning. YouTube streamer allerede i formatet.

NHK BS8K tilbyder desuden lyd i op til 22.2 kanaler, men ikke alt indhold vil blive udsendt i dette surround-format. 2001: A Space Odyssey sendes eksempelvis i 8K med standard 5.1 surroundlyd og ingen HDR, hvorimod udsendelsen fra Vienna Philharmonic byder p bde 22.2 lyd og HDR.

Disse udfordringer vil blive lst med tiden og mske begynder forbrugere sgar at kbe endnu strre tv-skrme, der kan udnytte den meget hje oplsning. Vejen er dog lang og brolagt med hindringer.

NHK har vret en drivende kraft i udviklingen af 8K-teknologi, som de tidligere har kaldt Super Hi-Vision. Ved den officielle lancering lader det dog til, at public service-udbyderen har lagt sig fast p det mere udbredte udtryk 8K, som er en forkortelse for 7680x4320 pixels fire gange s mange pixels som 4K.

Hvis du er nysgerrig efter at lse mere om NHKs arbejde p omrdet, s besg nhk.or.jp/8k. Vi forventer at hre mere om 8K p CES-messen i januar 2019.

NHK: The history of 8K Super Hi-Vision

1995 Research on ultra high-definition video system begins.
2000Research begins on ultra high-definition video system with 4000 scanning lines and 3D audio system.
2002MarchUltra high-definition video system with 4000 scanning lines and 3D sound reproduction system displayed at the inaugural ceremony at NHK Science & Technology Research Laboratories.
2003MayMovie on the ultra high-definition video system with 4000 scanning lines shown at NHK Science & Technology Research Laboratories open house.
2004Ultra high-definition video system with 4000 scanning lines and 22.2 multichannel sound system named Super Hi-Vision.
2005MarchSuper Hi-Vision is shown on a 6OO-inch screen at the Expo 2005 Aichi Japan.
OctoberThe Kyushu National Museum introduced a system displaying stills of art pieces in Super Hi-Vision.
NovemberLive feed experiment to transmit uncompressed Super Hi-Vision signals via optical fiber succeeds.
2016AprilDisplayed at the NAB2006 (biggest international exhibition of broadcasting equipment in the US) in Las Vegas.
SeptemberDisplayed at the lBC2006 (biggest international exhibition of broadcasting equipment in Europe) in Amsterdam.
DecemberNHK's program "Kouhaku Utagassen" (The Red and White Year-end Song Festival) was successfully transmitted with bit-rate compression over IP networks from Tokyo to Osaka, in cooperation with NTT and NTT Communications.
2007OctoberVideo format standardized by SMPTE.
2008JulyAudio system format (22.2 multichannel sound system) standardized by SMPTE.
SeptemberAt the lBC2008 in Amsterdam, NHK succeeded in an international transmission experiment, in cooperation with BBC, RAI, among others (IP networks from London to Amsterdam; satellite from Turin to Amsterdam).
2009AprilDisplayed at NAB2009 in Las Vegas.
MayLive experiment to transmit Super Hi-Vision video over multiple channels via satellite. A full resolution projector was put on display at NHK Science & Technology Research Laboratories open house.
2010MayFull resolution color camera was displayed at NHK Science & Technology Research Laboratories open house.
AugustInterface standardized by SMPTE.
SeptemberDisplayed at the IBC2010 in Amsterdam. NHK succeeded in an international live feed transmission experiment from London to Tokyo using IP networks, in cooperation with BBC, NTT, among others.
2011JanuaryPractical compact projector developed.
May85-inch liquid crystal display and display with built-in 22.2 multichannel sound reproduction system were exhibited at NHK Science & Technology Research Laboratories open house.
SeptemberExhibited at the IBC2011 in Amsterdam.
SeptemberExhibited at ITU-R in Geneva.
2012FebruaryImage sensor with the frame rate of 120Hz is developed.
April145-inch plasma display is developed.
MayCompact camera (same size as HDTV camera) is developed.
MayTransmission experiment via terrestrial waves succeeds.
MayProduction system for 22.2 multichannel audio exhibited at NHK Science & Technology Research Laboratories open house.
JulyPublic viewings of the 2012 London Olympic Games in Super Hi-Vision held.
AugustRecommended as the international standard for television by lTU-R.
2013FebruaryTransmission experiment via cable TV facilities succeeds.
MayHEVC encoding device is developed.
MayCube type compact camera head is developed.
2014JanuaryLong-distance transmission experiment via terrestrial waves succeeds.
FebruaryPublic viewings of the 2014 Sochi Olympics Games was held.
May8K Super Hi-Vision transmission test using the nation's largest cable TV facility succeeded.
JunePublic viewings of 2014 FIFA World Cup Brazil was held.
SeptemberVideo shot using a 8K Super Hi-Vision camera with a frame frequency of 120Hz was shown for the first time in the world at IBC2014 in Amsterdam.
- Kilde: NHK (2)



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