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HDMAC
HD-MAC (High Definition Multiplexed Analogue Components) was a broadcast television standard proposed by the European Commission in 1986, as part of Eureka 95 project. It belongs to the MAC - Multiplexed Analogue Components standard family. It is an early attempt by the EEC to provide High-definition television (HDTV) in Europe. It is a complex mix of analogue signal (based on the Multiplexed Analogue Components standard), multiplexed with digital sound, and assistance data for decoding (DATV). The video signal (1250 lines/50 fields per second in 16:9 aspect ratio, with 1152 visible lines) was encoded with a modified D2-MAC encoder. HD-MAC could be decoded by normal D2-MAC standard definition receivers, but no extra resolution was obtained and certain artifacts were visible. To decode the signal in full resolution a specific HD-MAC tuner was required . Naming convention The European Broadcasting Union video format description is as follows: width x height can type: ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
High-definition Television
High-definition television (HD or HDTV) describes a television system which provides a substantially higher image resolution than the previous generation of technologies. The term has been used since 1936; in more recent times, it refers to the generation following standard-definition television (SDTV), often abbreviated to HDTV or HD-TV. It is the current de facto standard video format used in most broadcasts: terrestrial broadcast television, cable television, satellite television and Blu-ray Discs. Formats HDTV may be transmitted in various formats: * 720p (1280 horizontal pixels × 720 lines): 921,600 pixels * 1080i (1920×1080) interlaced scan: 1,036,800 pixels (~1.04 MP). * 1080p (1920×1080) progressive scan: 2,073,600 pixels (~2.07 MP). ** Some countries also use a non-standard CEA resolution, such as 1440×1080i: 777,600 pixels (~0.78 MP) per field or 1,555,200 pixels (~1.56 MP) per frame When transmitted at two megapixels per frame, HDTV provides about five times ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Broadcast Television Systems
Broadcast television systems (or terrestrial television systems outside the US and Canada) are the encoding or formatting systems for the transmission and reception of terrestrial television signals. Analog television systems were standardized by the International Telecommunication Union in 1961, with each system designated by a letter ( A- N) in combination with the color standard used (NTSC, PAL or SECAM) - for example PAL-B, NTSC-M, etc.). These analog systems for TV broadcasting dominated until the 2010s. With the introduction of digital terrestrial television (DTT), they were replaced by four main systems in use around the world: ATSC, DVB, ISDB and DTMB. Analog television systems Every analog television system bar one began as a black-and-white system. Each country, faced with local political, technical, and economic issues, adopted a color television standard which was grafted onto an existing monochrome system such as CCIR System M, using gaps in the video spectrum ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1992 Summer Olympics
The 1992 Summer Olympics ( es, Juegos Olímpicos de Verano de 1992, ca, Jocs Olímpics d'estiu de 1992), officially known as the Games of the XXV Olympiad ( es, Juegos de la XXV Olimpiada, ca, Jocs de la XXV Olimpíada) and commonly known as Barcelona '92, were an international multi-sport event held from 25 July to 9 August 1992 in Barcelona, Catalonia, Spain. This was the second (after 1968) "Olympic Games" to be held in a Spanish-speaking nation, then followed by the 2018 Summer Youth Olympics in Buenos Aires, Argentina. Beginning in 1994, the International Olympic Committee decided to hold the Summer and Winter Olympics in alternating even-numbered years. The 1992 Summer and Winter Olympics were the last games to be staged in the same year. This games was the second and last two consecutive Olympic games to be held in Western Europe after the 1992 Winter Olympics in Albertville, France held five months earlier. The 1992 Summer Games were the first since the end of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ultra High Frequency
Ultra high frequency (UHF) is the ITU designation for radio frequency, radio frequencies in the range between 300 megahertz (MHz) and 3 gigahertz (GHz), also known as the decimetre band as the wavelengths range from one meter to one tenth of a meter (one decimeter). Radio waves with frequencies above the UHF band fall into the super-high frequency (SHF) or microwave frequency range. Lower frequency signals fall into the VHF (very high frequency) or lower bands. UHF radio waves propagate mainly by Line-of-sight propagation, line of sight; they are blocked by hills and large buildings although the transmission through building walls is strong enough for indoor reception. They are used for UHF television broadcasting, television broadcasting, cell phones, satellite communication including GPS, personal radio services including Wi-Fi and Bluetooth, walkie-talkies, cordless phones, satellite phones, and numerous other applications. The Institute of Electrical and Electronics ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laserdisc
The LaserDisc (LD) is a home video format and the first commercial optical disc storage medium, initially licensed, sold and marketed as DiscoVision, MCA DiscoVision (also known simply as "DiscoVision") in the United States in 1978. Its diameter typically spans . Unlike most optical disc standards, LaserDisc is not fully Digital data, digital, and instead requires the use of analog video signals. Although the format was capable of offering higher-quality video and audio than its consumer rivals—VHS and Betamax videotape—LaserDisc never managed to gain widespread use in North America, largely due to high costs for the players and the inability to record TV programmes. It eventually did gain some traction in that region and became somewhat popular in the 1990s. It was not a popular format in Europe and Australia. By contrast, the format was much more popular in Japan and in the more affluent regions of Southeast Asia, such as Hong Kong, Singapore and Malaysia, and was the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type B Videotape
1–inch type B VTR (designated Type B by SMPTE) is a reel-to-reel analog recording video tape format developed by the Bosch Fernseh division of Bosch in Germany in 1976. The magnetic tape format became the broadcasting standard in continental Europe, but adoption was limited in the United States and United Kingdom, where the Type C videotape VTR met with greater success. Details The tape speed allowed 96 minutes on a large reel (later 120 minutes), and used 2 record/playback (R/P) heads on the drum rotating at 9,000 RPM with a 190-degree wrap around a very small head drum, recording 52 video lines per head segment. A single video frame was recorded across 6 tracks in the tape. The format only allowed for play, rewind and fast forward. Video is recorded on an FM signal with a bandwidth of 5.5 MHz. Three longitudinal audio tracks are recorded on the tape as well: two audio and one Linear timecode (LTC) track. BCN 50 VTRs were used at the 1980 Summer Olympics in Moscow. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charge-coupled Device
A charge-coupled device (CCD) is an integrated circuit containing an array of linked, or coupled, capacitors. Under the control of an external circuit, each capacitor can transfer its electric charge to a neighboring capacitor. CCD sensors are a major technology used in digital imaging. In a CCD image sensor, pixels are represented by p-doped metal–oxide–semiconductor (MOS) capacitors. These MOS capacitors, the basic building blocks of a CCD, are biased above the threshold for inversion when image acquisition begins, allowing the conversion of incoming photons into electron charges at the semiconductor-oxide interface; the CCD is then used to read out these charges. Although CCDs are not the only technology to allow for light detection, CCD image sensors are widely used in professional, medical, and scientific applications where high-quality image data are required. In applications with less exacting quality demands, such as consumer and professional digital cameras, act ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plumbicon
Video camera tubes were devices based on the cathode ray tube that were used in television cameras to capture television images, prior to the introduction of charge-coupled device (CCD) image sensors in the 1980s. Several different types of tubes were in use from the early 1930s, and as late as the 1990s. In these tubes, an electron beam was scanned across an image of the scene to be broadcast focused on a target. This generated a current that was dependent on the brightness of the image on the target at the scan point. The size of the striking ray was tiny compared to the size of the target, allowing 483 horizontal scan lines per image in the NTSC format, 576 lines in PAL, and as many as 1035 lines in Hi-Vision. Cathode ray tube Any vacuum tube which operates using a focused beam of electrons, originally called cathode rays, is known as a cathode ray tube (CRT). These are usually seen as display devices as used in older (i.e., non-flat panel) television receivers and compute ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seville Expo '92
The Seville Expo '92 was a universal exposition that took place from Monday, April 20 to Monday, October 12, 1992, on La Isla de La Cartuja (Charterhouse Island), Seville, Spain. The theme for the expo was "The Age of Discovery", celebrating the 500th anniversary of Christopher Columbus reaching the Americas after launching from Seville's port (on the Guadalquivir), and over 100 countries were represented. The total amount of land used for the expo was and the total number of visitors was 41,814,571. The exposition ran at the same time as the smaller and shorter-duration Genoa Expo '92, a Specialized Exhibition, held in memory of Christopher Columbus, born in Genoa. Joint exposition proposal with Chicago Expo'92 was organized to celebrate the 500th anniversary of the discovery of the Americas by Christopher Columbus (1492-1992). The exposition was to be jointly held with the City of Chicago, however, due to national, state, and local funding difficulties, Chicago did not accept ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
3sat
In logic and computer science, the Boolean satisfiability problem (sometimes called propositional satisfiability problem and abbreviated SATISFIABILITY, SAT or B-SAT) is the problem of determining if there exists an interpretation that satisfies a given Boolean formula. In other words, it asks whether the variables of a given Boolean formula can be consistently replaced by the values TRUE or FALSE in such a way that the formula evaluates to TRUE. If this is the case, the formula is called ''satisfiable''. On the other hand, if no such assignment exists, the function expressed by the formula is FALSE for all possible variable assignments and the formula is ''unsatisfiable''. For example, the formula "''a'' AND NOT ''b''" is satisfiable because one can find the values ''a'' = TRUE and ''b'' = FALSE, which make (''a'' AND NOT ''b'') = TRUE. In contrast, "''a'' AND NOT ''a''" is unsatisfiable. SAT is the first problem that was proved to be NP-complete ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bayerischer Rundfunk
Bayerischer Rundfunk (BR; "Bavarian Broadcasting") is a public-service radio and television broadcaster, based in Munich, capital city of the Free State of Bavaria in Germany. BR is a member organization of the ARD consortium of public broadcasters in Germany. History Bayerischer Rundfunk was founded in Munich in 1922 as Deutsche Stunde in Bayern. It aired its first program on 30 March 1924. The first broadcasts consisted mainly of time announcements, news, weather and stock market reports, and music. Programming expanded to include radio plays, concerts, programs for women, language courses, chess, opera, radio, news, and Catholic and Protestant morning services. Its new 1929 studio was designed by Richard Riemerschmid. Deutsche Stunde in Bayern became Bayerischer Rundfunk in 1931. In 1933, shortly after the Nazi seizure of power, the station was put under the control of the Reich Ministry of Public Enlightenment and Propaganda. After the Allied victory over Nazi Germany, t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Südwestrundfunk
Südwestrundfunk (SWR; ''Southwest Broadcasting'') is a regional public broadcasting corporation serving the southwest of Germany , specifically the federal states of Baden-Württemberg and Rhineland-Palatinate. The corporation has main offices in three cities: Stuttgart, Baden-Baden and Mainz, with the director's office being in Stuttgart. It is a part of the ARD consortium. It broadcasts on two television channels and six radio channels, with its main television and radio office in Baden-Baden and regional offices in Stuttgart and Mainz. It is (after WDR) the second largest broadcasting organization in Germany. SWR, with a coverage of 55,600 km2, and an audience reach estimated to be 14.7 million. SWR employs 3,700 people in its various offices and facilities. History SWR was established in 1998 through the merger of ''Süddeutscher Rundfunk'' (SDR, Southern German Broadcasting), formerly headquartered in Stuttgart, and ''Südwestfunk'' (SWF, South West Radio), former ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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