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| High-Definition Television | |
|---|---|
| Name | High-Definition Television |
| Introduced | 1936 (experimental antecedents); 1996 (widespread adoption) |
| Format | 720p, 1080i, 1080p, 4K, 8K |
| Resolution | 1280×720 to 7680×4320 |
| Color | Rec. BT.601, Rec. BT.709, Rec. BT.2020 |
High-Definition Television
High-Definition Television is a class of television signal and display formats characterized by higher spatial resolution and quality than earlier systems. It evolved through contributions from broadcasters, manufacturers, research institutions and standards bodies to become a global platform for entertainment, sports and news. The format influenced industries including film, satellite, telecommunications, semiconductor and consumer electronics.
HDTV development traces to research laboratories and broadcasters such as British Broadcasting Corporation, Nippon Telegraph and Telephone, National Association of Broadcasters, American Broadcasting Company, Columbia Broadcasting System, Japan Broadcasting Corporation, Deutsche Welle, and Électricité de France. Early experimental systems were demonstrated at events like the 1936 Summer Olympics and by engineers from RCA Corporation, Philips, Sony Corporation, NHK (Japan) and Thomson SA. Standards efforts involved organizations including International Telecommunication Union, Society of Motion Picture and Television Engineers, European Broadcasting Union and Advanced Television Systems Committee after initiatives such as the World Administrative Radio Conference. Milestones included demonstrations at the Consumer Electronics Show and launches by broadcasters like Nippon Television Network Corporation, BBC Two, NHK and Sky UK. Industry shifts were driven by companies such as Panasonic Corporation, Sharp Corporation, LG Electronics, Samsung Electronics, Toshiba Corporation and Sharp alongside semiconductor firms Intel Corporation, NVIDIA Corporation and Broadcom Inc..
HDTV relies on technical standards defined by bodies including ITU-R, SMPTE, ATSC, DVB Project, ISDB, CEA (Consumer Electronics Association) and Japan Ministry of Internal Affairs and Communications. Common resolutions include 720p, 1080i and 1080p, while Ultra High Definition formats like 2160p and 4320p are referred to as 4K and 8K, discussed by Ultra HD Forum. Colorimetry uses recommendations such as Rec. BT.709 and Rec. BT.2020, with video coding standards like MPEG-2, H.264/MPEG-4 AVC, HEVC (H.265), AV1 and VP9. Audio standards include Dolby Laboratories formats, DTS, MPEG-1 Audio Layer II and Dolby Digital Plus. Transmission layers reference protocols and modulation schemes from QAM, OFDM, ATSC 3.0 and DVB-T2, while metadata systems like HDMI Forum specifications and CEA-861 define interfaces.
HDTV production integrates equipment and workflows from companies such as ARRI, Panavision, Blackmagic Design, Grass Valley Group, Sony Electronics, Canon Inc., RED Digital Cinema and Avid Technology. Camera systems conform to standards by SMPTE and recording formats like XAVC, ProRes, AVCHD and MXF are used alongside editing suites from Adobe Systems, Apple Inc. and Autodesk. Broadcasting infrastructure involves satellite operators like Intelsat, Eutelsat, SES S.A., and terrestrial networks from Verizon Communications, AT&T Inc., Deutsche Telekom and NTT DoCoMo. Live sports and events coordinated by organizations such as FIFA, International Olympic Committee, UEFA, National Football League, English Premier League and Formula One Group accelerated HDTV production techniques including multicamera workflows, slow motion replay systems, augmented graphics from Chyron, and IP-based routing standards from SMPTE 2110.
Consumer devices evolved through manufacturers Samsung Electronics, LG Electronics, Sony Corporation, Panasonic Corporation, TCL Corporation, Vizio, Hisense, Sharp Corporation and Toshiba Corporation. Set-top boxes and tuners came from Roku, Inc., Apple Inc., Google LLC, Amazon.com, Inc. (Fire TV), NVIDIA Corporation (Shield), TiVo Corporation and cable vendors like Comcast Corporation and Liberty Global. Optical media and playback involved Blu-ray Disc Association, Sony BMG, Warner Bros., Paramount Pictures, Walt Disney Company and Universal Pictures. Gaming consoles including Sony PlayStation, Microsoft Xbox and Nintendo contributed to display expectations. Component and semiconductor suppliers such as Texas Instruments, Samsung Electronics (semiconductors), Micron Technology, SK Hynix, ARM Holdings and Qualcomm provided chips for decoding, scaling and DRM systems like Widevine and Microsoft PlayReady.
Display technologies for HDTV include LCD, LED, OLED, QLED and plasma variants produced by LG Display, Samsung Display, AU Optronics, Sharp Corporation and BOE Technology. Backlight and quantum dot innovations involved Nanosys, QD Vision, Samsung SDI and 3M Company. Calibration and measurement used equipment from Datacolor, X-Rite, Konica Minolta and standards by SMPTE and ITU-R. Signal reception uses devices from Sony, Panasonic, Sharp, Humax and antenna manufacturers linked to AntennaSDirect. Display interfaces and cables are specified by HDMI Forum, VESA, DisplayPort Consortium and USB Implementers Forum.
HDTV adoption was propelled by broadcasters, content producers and platform operators such as Netflix, Amazon Studios, Hulu (service), YouTube, Sky Group, DirecTV, Dish Network and BBC. Film and television awards entities like Academy of Motion Picture Arts and Sciences, British Academy of Film and Television Arts and Emmy Awards recognized content produced or remastered in HD. Sports rights negotiations involved organizations including ESPN, Sky Sports, BT Sport and Fox Sports. Retail and distribution networks include Best Buy, Walmart, Currys plc and Amazon.com, Inc. with consumption patterns influenced by Nielsen Holdings. The shift to HDTV affected cinema chains like AMC Theatres, Cineworld Group and Regal Cinemas as well as post-production houses such as Deluxe Entertainment Services Group and Technicolor SA.
Spectrum allocation and regulation for HDTV broadcasting have been handled by agencies such as Federal Communications Commission, Ofcom, Ministry of Internal Affairs and Communications (Japan), Australian Communications and Media Authority, Canadian Radio-television and Telecommunications Commission and European Commission. Digital transition events like the United States digital television transition, Digital Switchover in the United Kingdom and other national switchover programs were coordinated with standards bodies including ITU and ITU-R. Policy debates involved stakeholders such as CTIA, NTIA, European Broadcasting Union and GSMA concerning spectrum repacking, incentive auctions, and coexistence with mobile services provided by operators like Verizon Communications, AT&T Inc. and T-Mobile US. Intellectual property and licensing disputes engaged Dolby Laboratories, MPEG LA, Fraunhofer Society and Patent pools entities.
Category:Television technology