Super Hi-Vision
From Wikipedia, the free encyclopedia
 |
This article contains information about a scheduled or expected future product. It may contain preliminary information that does not reflect the final version of the product. |
Super Hi-Vision (SHV), also known as Ultra High Definition (UHD), Ultra High Definition Video (UHDV), Ultra High Definition Television (UHDTV)[1], Extreme Definition Video and 8K is an experimental digital video format, currently proposed by NHK of Japan, the BBC, and RAI.
The new format has a resolution of 7680 × 4320 pixels, four times as wide and four times as high (for a total of 16 times the pixel resolution) as existing HDTV, which has a maximum resolution of 1920 × 1080 pixels. According to the Yomiuri Shimbun, the Japanese Ministry of Internal Affairs and Communications will be starting a public-private partnership to develop technology for SHV in the hopes of setting an international standard for Super Hi-Vision in addition to broadcasting with it beginning in 2020.[2]
Contents |
[edit] Experimental technology
Super Hi-Vision's main specifications:
- Resolution: 7,680 × 4,320 pixels (16:9) (approximately 33.2 megapixels)
- Bits depth: 10-bit per channel
- Colorimetry: Rec. 709
- Frame rate: 50 and 60 frame/s. (progressive)
- Audio: 22.2 channels
- 9 — above ear level (top layer)
- 10 — ear level (middle layer)
- 3 — below ear level (bottom layer)
- 2 — low frequency effects
- Bandwidth:
- UHF - 8MHz, 35~45Mbit/s bandwidth (RAI DVB-T2 tests)
- Ku-band - 2x36MHz transponders, 140~150Mbit/s bandwidth (DVB-S2)
- Ka-band - 600MHz, 500~6600Mbit/s bandwidth
Because this format is highly experimental, NHK researchers had to build their own prototype from scratch. In the system demonstrated in September 2003, they used an array of 16 HDTV recorders to capture the 18-minute-long test footage.
The camera itself was built with four 2.5 inch (64 mm) CCDs each with a resolution of only 3840 × 2048. Using two CCDs for green and one each for red and blue, they then used a spatial pixel offset method[3] to bring it to 7680 × 4320.[4]
Recently Aptina Imaging announced the introduction of a new CMOS Image sensor specifically designed for NHK Super Hi-Vision project.[5]
The system was demonstrated at Expo 2005, Aichi, Japan, the NAB 2006 and NAB 2007 conferences, Las Vegas, and at IBC 2006 and IBC 2008 ,[6] Amsterdam, Netherlands and also showing in Consumer Electronics Show 2009 A review of the NAB 2006 demo was published in a Broadcast Engineering e-newsletter.[7]
In November 2005 NHK demonstrated a live relay of Super Hi-Vision program over a distance of 260 km by a fiber optic network. Using dense wavelength division multiplex (DWDM), 24 gigabit speed was achieved with a total of 16 different wavelength signals.
On December 31, 2006, NHK demonstrated a live relay of their annual Kōhaku Uta Gassen over IP from Tokyo to a 450 inch (11.4 m) screen in Osaka. Utilizing a codec developed by NHK, the video was compressed from 24 Gbit/s to 180–600 Mbit/s and the audio was compressed from 28 Mbit/s to 7–28 Mbit/s.[8] Uncompressed, a 20 minute broadcast would require roughly 28Tb of storage. 50 TB and over disc
In another indoor demonstration at the NHK Open House, the Super Hi-Vision signal was compressed to a 250 Mbit MPEG2 stream. This was later input to a 300 MHz wide band modulator and broadcast using a 500 MB using QPSK modulation. This "on the air" transmission had a very limited range (less than 2 metres), but show the feasibility of a satellite transmission in the 36,000 km orbit.
Three standards deal with Super Hi-vision:
- ITU BT 1201
- ITU 1769
- SMPTE 2036
The BBC also appears to be interested in the technology. During IBC 2008 Japan's NHK, Italy's RAI and the BBC (with various partners) demonstrated the first ever public live transmission of Super Hi-Vision, from London to the conference site in Amsterdam.[9][10]
In addition it was demonstrated at the BBC's Media Centre in West London in early October, 2008.
The BBC has been looking into the use of its Dirac codec with Super Hi-Vision.
Although Super Hi-Vision has increased resolution compared with existing HD standards, it uses the same number of frames per second (60Hz progressive scan, 50Hz interlaced, whereas modern cinema films are usually 24Hz and standard definition video 25/29.97Hz). This may be a problem for anything other than carefully chosen test material.
[edit] See also
 |
Wikimedia Commons has media related to: UHDV |
- 22.2 (the audio component of SHV)
- HDTV
- MPEG
- Red Digital Cinema Camera Company
[edit] Notes and references
- ^ Japanese government supports Ultra HD
- ^ "[16 times the resoultion 1080p full hd 6 times resoultion quad hdhttp://www.yomiuri.co.jp/dy/national/20080114TDY01305.htm Govt, private firms to team on Super Hi-Vision]". Yomiuri Shimbun. 2008-01-14. 16 times the resoultion 1080p full hd 6 times resoultion quad hdhttp://www.yomiuri.co.jp/dy/national/20080114TDY01305.htm. Retrieved on 2008-01-15.
- ^ The resulting lines in the image alternate between pixels from the green-1 and red CCDs, and pixels from the blue and green-2 CCDs.
- ^ M. Kanazawa, et al. (2003) (PDF). Ultrahigh-Definition Video System with 4000 Scanning Lines. NHK. http://www.nhk.or.jp/digital/en/technical_report/pdf/ibc200301.pdf. Retrieved on 2008-03-12.
- ^ Aptina Imaging introduces new high performance cmos sensor for high definition broadcasting video camera. http://www.aptina.com/news/press/aptina_imaging_introduces_new_high_performance_cmos_sensor_for_high_definition_broadcasting_video_camera/.
- ^ Sangani, Kris (2008-10-11). "A game of leapfrog". Engineering & Technology 3 (17): p.8. ISSN 1750-9637. http://kn.theiet.org/magazine/issues/0817/game-o-leapfrog-0817.cfm. Retrieved on 2008-10-31.
- ^ "Ultra HD draws crowds, interest at NAB2006". BroadcastEngineering HD Technology Update e-newsletter. 2006-05-02. http://broadcastengineering.com/newsletters/hd_tech/20060502/ultra-hd-interest-20060502/. Retrieved on 2007-02-14.
- ^ "Super Hi-Vision live relay over IP". NHK. 2007-04-03. http://www.nhk.or.jp/digital/en/super_hi/03_2_super.html. Retrieved on 2008-01-15.
- ^ "IBC Plans Two HD Firsts". AVS Forums. 2008-09-18. http://www.avsforum.com/avs-vb/showthread.php?t=1058514. Retrieved on 2008-10-03.
- ^ "Live super-HD TV to debut at IBC". Broadcast Now. 2008-05-27. http://www.broadcastnow.co.uk/news/2008/05/live_superhd_tv_to_debut_at_ibc.html. Retrieved on 2008-10-03.
[edit] External links
Official sites
Video
Articles
- What is Ultra HDTV? An in-depth look at Super Hi-Vision technology
- Ultra high resolution television (UHDV) prototype CD Freaks
- Just Like High-Definition TV, but With Higher Definition The New York Times
- Japan demonstrates next-gen TV broadcast Electronic Engineering Times
- Europe gets glimpse of HD future BBC News Online
- Researchers craft HDTV's successor PC World (magazine)
- Super Hi-Vision — research on a future ultra-HDTV system Masayuki Sugawara, EBU Technical Review
- Farewell to the Kingdom of Shadows A filmmaker's first impression of Super Hi-Vision television
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
