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History and Futureof Broadcast Technologies at NHK
Kenji NagaiGeneral Managing Director
Executive Director-General of EngineeringJapan Broadcasting Corporation
December 7, 2009
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Purpose of NHK -The Broadcast Act-
Article 7 (Purpose)The purpose of NHK is to conduct the domestic broadcasting of, or to entrust the broadcasting of, enriched and high quality broadcast programs for the public welfare in such a manner that the broadcasting may be received all over Japan, to conduct business necessary for the improvement and development of broadcasting and the reception thereof, and to conduct international broadcasting and NHK’s international broadcast programming operations.
Article 9 (Business)(5) NHK shall make arrangements to ensure that either medium frequency broadcasting or very high frequency broadcasting and television broadcasting can be received all over Japan.
Article 9 (Business)(1) NHK shall conduct the following business for the accomplishment of the purpose mentioned in Article 7:
(iii) To conduct research and investigation necessary for the improvement and development of broadcasting and the reception thereof,
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Progress of Broadcast Technology in Japan
Experimental HDTV Broadcasting (1 hour/day)
HDTV Broadcasting (8 hours/day)
Experimental Satellite Broadcasting
Television Broadcasting
Radio Broadcasting
FM Broadcasting
Satellite Digital Broadcasting
One-Seg Service
Terrestrial Digital BroadcastingDigital Sound Broadcasting
Start of R&D on Terrestrial Digital Broadcasting
Start of R&D on HDTV
Start of R&D on Satellite Broadcasting
Start of R&D on Super Hi-Vision
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Foundation of NHK STRL
Radio2
Educational Television Broadcasting
B-SAT/LMCSS 提供
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R&D on Television System -Past and Future-
TV-lines
Super Hi-Vision (UHDTV)
1995
1964
Hi-Vision (HDTV)
SDTV
2025
Start of Service
R&D
20001980 20201920 1960
1954(NTSC)1967(PAL)
625/525
1080
4320
Baird (UK)
Takayanagi (Japan)
3D TV based on Spatial Imaging Technology
R&D
R&D
Start of Service
2000
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Super Hi-Vision System
Super Hi-Vision has extremely high spatial resolution, 33 million pixels per frame, and it can provide viewers with stunning images. Various parameters other than spatial resolution is under investigation now.
The wide visual angle of 100 degrees provides viewers with an immersive feeling. The purpose of Super Hi-Vision to home is to provide a totally new viewing experience to
enjoy wide and extremely high resolution images from any viewing distance.
4320
7680
Viewing distance : 0.75 x Picture heightViewing angle : 100 degrees
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International Collaboration on Super Hi-Vision
Received “Special Award” for the world’s first international transmission of Super Hi-Vision signal
Received “Technology Innovation Award” for development of new media technologies
IBC 2008 (Amsterdam) NAB 2009 (Las Vegas)
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3D TV based on Spatial Imaging -Integral Method-
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Business interests in Stereoscopic 3D television system are increasing in various industries worldwide. However, discrepancy between the convergence point and the focal point causes visual fatigue.
Spatial imaging system does not cause visual fatigue nor requires special glasses, because an object is reconstructed as a spatial image (light field).
Upper Viewpoint
Right ViewpointLeft Viewpoint
Lower Viewpoint
Display Device
Object reconstructed as a spatial image
Reconstruction of light
Viewer
Image’s appearance changes as the viewer’s position moves
Integral 3D Imaging System
