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Yukihiro NISHIDA NHK (Japan Broadcasting Corporation)

Digital broadcasting in Japan, and R&D at NHK towards future broadcasting including UHDTV and 3DTV. Yukihiro NISHIDA NHK (Japan Broadcasting Corporation). Outline. Digital broadcasting in Japan Terrestrial and satellite broadcasting R&D at NHK towards future broadcasting Strategy

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Yukihiro NISHIDA NHK (Japan Broadcasting Corporation)

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  1. Digital broadcasting in Japan, and R&D at NHK towards future broadcasting including UHDTV and 3DTV Yukihiro NISHIDA NHK (Japan Broadcasting Corporation)

  2. Outline • Digital broadcasting in Japan • Terrestrial and satellite broadcasting • R&D at NHK towards future broadcasting • Strategy • Hybridcast • UHDTV • 3DTV • Next generation of DTTB system

  3. Digital broadcasting in Japan

  4. History of Broadcasting in Japan 2011 1925 Radio 1953 2011 TerrestrialAnalog TV 1969 FM Radio 1984 2011 Satellite Analog TV 1989 2007 Satellite Analog HDTV 2000 Satellite Digital HDTV 2003 Terrestrial Digital HDTV 2006 For Mobile

  5. Digital Broadcasting in Japan Satellite Terrestrial (Dec. 2000 ~) (Dec. 2003 ~) ISDB-S (Satellite) ISDB-T (Terrestrial) 12GHz band UHF band HDTV (1080) Digital receivers:114 millions (cumulative) (as of Apr. 2011) Mobile receivers: 104 millions (cumulative)(as of Mar. 2011) Fixed reception ISDB: Integrated Services Digital Broadcasting

  6. Feature of ISDB-S (Satellite) Multiple HDTV programs and hierarchical service in a channel Example of slot allocationwithin a channel Controlledby TMCC Heavy rain Clear sky -2 slots TS 1 (HDTV) 22-slot TS 1 (HDTV) 24-slot 48-slot Symbol rate 28.86 Mbaud TC8PSK(1.08 Mbps/slot) TS 2 (HDTV) 24-slot TS 2 (HDTV) 24-slot TS 1 (LDTV)1-slot QPSK 1/2(1.08 Mbps/ 2slots) +1 slot TS 1 (LDTV) can be received even in a heavy rain.

  7. Satellite Broadcasting in Japan (12 GHz band) NHK Current NHK NHK HD HD HD HD HD HD HD HD HD HD HD Analog Analog Analog CH-9 CH-11 CH-13 CH-15 CH-17 CH-19 CH-21 CH-23 CH-1 CH-3 CH-5 CH-7 After July 2011 SD HD HD HD HD HD HD HD HD HD HD HD SD x7 HD HD HD HD HD HD HD HD HD HD HD HD HD HD HD HD HD

  8. Feature of ISDB-T (Terrestrial) Simulcast of HDTV and service for mobile reception in one channel 13-segment, channel bandwidth: 6 MHz HDTV (1080) 12-segment 12-segment 1-segment One-segment On-air program QPSK FEC = 2/3 (416kbps) 64QAM FEC = 3/4 (16.851Mbps) Data service

  9. ISDB-T supports 3 reception types One TVchannel 6, 7, or 8 MHz (13 segments) Fixed Reception 12 segment HDTV Internet / Telephone modem Home Receiver TV station 1 segment 12 or 1 segment Mobile Reception Handheld Reception Communication link diversity reception Receiver in Vehicle Handheld terminal

  10. Warning message and picture Text Possibility of a flood in the xxx river has increased. Residents in the surrounding areas should evacuate. Areas affected are as follows. Emergency evacuation areas Start signal + warning On-air waves Mobile base station Request TV station Evacuation recommendation order Master roomEMG-button Server Automatic converter Tuner power-ONand warning message Emergency Warning System

  11. 90-108MHz 170-202.5MHz 207.5-222MHz After July 2011 Multimedia for mobile Telecom MM for mobile Digital TV 18MHz 32.5MHz 14.5MHz (VHF Low) (VHF High) （Guard band） 470-710MHz 13 - 52ch 715-725MHz 730-770MHz 2012 Multimedia for mobile Telecom MM for mobile Digital TV ITS IMT 240MHz 10MHz 40MHz Guard band Guard band Terrestrial TV broadcasting in Japan UHF band VHF band 90-108MHz 1 - 3ch 170-222MHz 4 - 12ch 470-770MHz 13 - 62ch Current Analog TV Analog TV Analog TV and Digital TV 18MHz 52MHz 300MHz

  12. Countries adopting ISDB-T and current status Under study in some other countries

  13. Research & Development at NHK towards future broadcasting

  14. NHK Science and Technology Research Labs.(STRL) • Established in 1930. • 222 researchers (as of March 2011) • Research areas • Research for realizing enhanced reality and spatial reproduction media • Super Hi-Vision, three-dimensional television, and high-presence audio systems • Research for realizing useful and universal services • Advances in digital broadcasting, techniques for linking broadcasting and communications networks, and user-friendly broadcast services • Research for realizing environment for producing advanced content • Next-generation content-production systems, storage systems, imaging systems, and display systems

  15. NHK’s R&D Strategy 20Years Natural 3D images not causing visual fatigue Spatial Imaging 3DTV 10Years Extremely high sense of reality as if you were on the site Ultra HDTV 3Years Today and future Enhance TV experience by taking advantage of broadcasting and communications services HybridBroadcasting Broadcast services for all people, handicapped, and elderly people Access Technology

  16. 3 years – HybridBroadcasting System Broadcasting (broadcast, quality, reliability) program Hybridcastreceiver Communication （meet personal request） Broadcast station Additional information Network (cloud) Synchronization CGM, SNS Content control/ delivery Connected-TV Content protection Personal data protection Home

  17. 10 years - Ultra High Definition TV (Super Hi-Vision) • Ultra high definition video - 33 Megapixels • 22.2 Multichannel sound

  18. Sensation of Reality (sense of being there) <HDTV> 1920 pixels Viewing angle: 30º 1080 pixels Viewing distance: 3H Test system of sensation of reality < UHDTV> Super Hi-Vision 7680 pixels HDTV 4320 pixels 100º Viewing distance: 0.75 H (H: picture height) 18

  19. Visual fidelity (sense of realness) Real object Observer Display <HDTV> 1920 pixels 1080 pixels Resolution: 30cpd Test system of sensation of realness Viewing distance: 3H Super Hi-Vision HDTV < UHDTV> 7680 pixels Sensation of realness (ln(p)) 4320 pixels Resolution: 120cpd Viewing distance: 3H Real object Resolution (cpd) (H: picture height) (cpd: cycles per degree) 19

  20. Wide-gamut colorimetry • Most of the real object colors and the color gamut of the existing video systems(HDTV, D-Cinema, and Adobe RGB) are covered. • Texture of objects and highly saturated colours that are closer to those of real objects are reproduced well. RGB monochromatic primaries on the spectrum locus Green(532nm) UHDTV HDTV Coverage of Pointer’s colour UHDTV: 99.9% HDTV: 75% Red(630nm) Blue(467nm)

  21. The world first 85-inch LCD for 8K UHDTV

  22. 20 years – Spatial imaging 3DTV • Goggle-free and fatigue-free 3DTV system

  23. Research on 3DTV at NHK 1960 1980 1990 2000 2010 Exploring various 3D systems Visual comfort/discomfort Visual fatigue Basic Research Phase 1 Phase 2 Phase 3 - 3DTV systems- Stereo vision- Human factors, etc. • Requirements for comfortable 3D viewing • (system and programs) • - Parallax distribution analysis - Parallax barrier system Full parallax, no glasses Lenticular System (1994) Integral photographyHolography Phase 4 Compact 3D HDTV Camera (1998) Electronic Holography Integral 3DTV 3D HDTV Demonstration at NAB (1991) 23

  24. Principle of Integral Imaging Elemental images on a display plate The system requires capture and display technologies that provide exceedingly high definition images. Lens array Reconstructed image Elemental image Observer Real image Reproduction of the intensity and direction of light rays Elemental image (around 20 x 20 pixels) Display plate 24

  25. Integral 3DTV System The system uses micro-lens arrays to capture and display 3D images Converging lens Reconstructed image Diffusion screen Depth control lens B G R Object UHDTV Display Observer UHDTV Camera Full-parallax Lens array GRIN Lens array • Features • - Natural viewing experience without special glasses • - Full parallax in horizontal and vertical directions • - Feasibility of live broadcast Upper Right Left Lower

  26. Developments of Integral 3DTV 1920x1080 lenses (20??) Integral 3DTV Stereoscopic 3D HDTV Multi-view 3D HDTV (eg.10 viewpoints) 2,000,000 1.5Tbps Lens count 3Gbps 1,000,000 853x480 lenses (202?) Integral 3DTV 300Gbps 100,000 160x117 lenses (2004) viewing angle: 17.5 degree 4Kx2K system based • 400x250 lenses (2009) • viewing angle: 24 degree • Full resolution SHV based 72Gbps 50,000 182x140 lenses (2007) Dual-green SHV based 10,000 54x59 lenses (1999) HDTV based pixel count of the base video system 800M 2M 8M 16M 33M

  27. Next Generation Digital Terrestrial Broadcasting Next Generation Interference Cancellation ?? Mbps • Reducing the required C/N • Error Correction • Channel Estimation Schemes Ultra-multilevel OFDM • Dual Polarized MIMO • Channel equalizer • MIMO-ODFM Demodulation • Dual Polarized Antenna 18 Mbps ISDB-T 2003 202x

  28. Next-generation ISDB-T system (example) SP: Scattered Pilot CP: Continual Pilot AC: Auxiliary Channel TMCC: Transmission and Mux. Configuration Control

  29. http://www.nhk.or.jp/strl/english/ Thank you for your attention. NHK STRL

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