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| TV Technology | |
|---|---|
| Name | Television technology |
| Invented | 1920s |
| Inventor | John Logie Baird; Philo Farnsworth; Vladimir Zworykin |
| Country | United Kingdom; United States; Russia |
| Introduced | 1930s |
TV Technology Television technology encompasses the engineering, manufacturing, and standards that enable electronic audio-visual transmission, reception, and display, linking pioneers, corporations, and institutions across the 20th and 21st centuries. It spans inventions by John Logie Baird, Philo Farnsworth, and Vladimir Zworykin through modern developments at Sony Corporation, Samsung Electronics, LG Electronics, and standards bodies like International Telecommunication Union and Society of Motion Picture and Television Engineers.
Early mechanical systems emerged from work by John Logie Baird and contemporaries, competing with electronic approaches developed by Philo Farnsworth and Vladimir Zworykin at companies such as RCA Corporation. The 1930s saw public demonstrations at events including the BBC experimental broadcasts and the 1936 Summer Olympics, while post-war expansions involved broadcasters like NBC and CBS building national networks. Transition milestones included the adoption of national standards such as NTSC, PAL, and SECAM, regulatory actions by entities like the Federal Communications Commission, and format shifts driven by studios including Warner Bros. and Paramount Pictures. Later revolutions featured the growth of cable operators like HBO and satellite services pioneered by DirecTV and Intelsat, followed by digital transitions guided by the Advanced Television Systems Committee and regional regulators like Ofcom.
Cathode-ray tubes, developed by companies including RCA Corporation, dominated early sets before flat-panel innovations from Sony Corporation and Panasonic Corporation. Liquid-crystal displays produced by manufacturers such as Sharp Corporation and Samsung Electronics displaced CRTs, while organic light-emitting diode panels advanced by LG Display and research at University of Cambridge enabled higher contrast. Quantum dot implementations marketed by Nanosys and local dimming from suppliers like TCL improved color and brightness. Emerging displays incorporate microLED efforts pursued by Apple Inc. and Sony Corporation and experimental emissive technologies explored at MIT Media Lab.
Analog standards like NTSC, PAL, and SECAM defined colorimetry and frame rates; later digital standards such as ATSC, DVB-T, and ISDB-T introduced compression and error correction techniques. Video codecs including MPEG-2, H.264, and HEVC were standardized by groups like Moving Picture Experts Group to reduce bandwidth for broadcasters and platforms like Hulu and Netflix. Transmission infrastructures rely on satellite constellations from Intelsat and Eutelsat, terrestrial networks managed by broadcasters like BBC and carriers such as Verizon Communications, and cable systems operated by companies including Comcast Corporation. Metadata and program guides follow standards promulgated by Advanced Television Systems Committee and commerce-driven bodies like Digital Video Broadcasting Project.
Broadcast networks such as BBC, NBC, and Televisión Española historically used over-the-air links to reach audiences, while distribution evolved with multichannel cable providers including Comcast Corporation and satellite operators like Eutelsat. Content syndication involves studios like Disney, Warner Bros., and distributors such as 20th Century Fox, and rights management engages organizations including Motion Picture Association of America. Internet-based distribution is dominated by streaming services including Netflix, Amazon Prime Video, and YouTube, leveraging content delivery networks operated by firms such as Akamai Technologies and backbone carriers like AT&T. Regulatory frameworks from agencies like the Federal Communications Commission and European Broadcasting Union shape market access and spectrum allocation.
Early set-top boxes were produced by manufacturers like Humax and Arris International to decode cable and satellite signals. Smart TV platforms developed by Roku, Inc., Google with Android TV, and Samsung Electronics's Tizen integrate apps from services such as Netflix, Hulu, and Disney+. Middleware solutions from firms like Microsoft Corporation and conditional access modules supplied by Nagra SA support electronic program guides and pay-TV authentication used by providers like Sky Group. Gaming and input convergence involve consoles from Sony Interactive Entertainment and Microsoft Xbox integrating streaming capabilities.
Signal processing chains employ codecs like MPEG-2, H.264, and AV1 standardized by Internet Engineering Task Force and Moving Picture Experts Group; demodulation and decoding use chipsets from Broadcom and Intel. Image enhancements include upscaling algorithms developed by NVIDIA Corporation and noise reduction techniques from research at Fraunhofer Society. Audio technologies range from stereo and surround formats by Dolby Laboratories to object-based sound systems like Dolby Atmos and immersive audio research at IRCAM. Calibration and measurement reference laboratories include NIST and broadcast engineering groups at IEEE.
Consolidation among media conglomerates such as Disney's acquisitions and mergers involving ViacomCBS reshape content ownership, while manufacturers like Samsung Electronics and LG Electronics compete on panel technology and smart features. Cord-cutting trends influence subscription platforms like Netflix and advertising strategies used by broadcasters like Fox Corporation, with data-driven targeting enabled by partnerships involving Google and Comcast Corporation. Spectrum reallocation decisions by regulators such as the Federal Communications Commission and technological shifts toward IP-based delivery continue to drive investment from companies including Amazon.com and Apple Inc..