SECAM, also written SÉCAM, is an analog color television system that was used in France, Russia and some other countries or territories of Europe and Africa. It was one of three major analog color television standards, the others being PAL and NTSC. Like PAL, a SECAM picture is also made up of 625 interlaced lines and is displayed at a rate of 25 frames per second. However, due to the way SECAM processes color information, it is not compatible with the German PAL video format standard. This page primarily discusses the SECAM colour encoding system. The articles on broadcast television systems and analog television further describe frame rates, image resolution, and audio modulation. SECAM video is composite video because the luminance and chrominance are transmitted together as one signal.
Color television or colour television is a television transmission technology that includes color information for the picture, so the video image can be displayed in color on the television set. It improves on the monochrome or black-and-white television technology, which displays the image in shades of gray (grayscale). Television broadcasting stations and networks in most parts of the world upgraded from black-and-white to color transmission between the 1960s and the 1980s. The invention of color television standards was an important part of the history and technology of television.
The Eurovision Song Contest 1988 was the 33rd edition of the annual Eurovision Song Contest. It took place in Dublin, Ireland, following Johnny Logan's win at the 1987 contest with the song "Hold Me Now". Organised by the European Broadcasting Union (EBU) and host broadcaster Radio Telefís Éireann (RTÉ), the contest was held at the RDS Simmonscourt on 30 April 1988 and was hosted by Irish broadcaster Pat Kenny and the Miss Ireland 1980 Michelle Rocca, marking the first time since the 1979 contest that two presenters had hosted the contest.
Broadcasttelevision systems are the encoding or formatting systems for the transmission and reception of terrestrial television signals.
RTP Internacional (RTPi) is a Portuguese free-to-air television channel owned and operated by state-owned public broadcaster Rádio e Televisão de Portugal (RTP). It is the company's international television service, and is known for broadcasting a mix of programming from other RTP's channels, together with special Contacto programmes aimed at Portuguese communities in Europe, Africa, the Americas, as well as Macao and East Timor.
The 405-line monochrome analogue television broadcasting system was the first fully electronic television system to be used in regular broadcasting. The number of television lines influences the image resolution, or quality of the picture.
Radiodiffusion-Télévision Française was the French national public broadcaster television organization established on 9 February 1949 to replace the post-war "Radiodiffusion Française" (RDF), which had been founded on 23 March 1945 to replace Radiodiffusion Nationale (RN), created on 29 July 1939. It was replaced in its turn, on 26 June 1964, by the notionally less-strictly government controlled Office de Radiodiffusion Télévision Française (ORTF), which itself lasted until the end of 1974.
The concept of television is the work of many individuals in the late 19th and early 20th centuries. The first practical transmissions of moving images over a radio system used mechanical rotating perforated disks to scan a scene into a time-varying signal that could be reconstructed at a receiver back into an approximation of the original image. Development of television was interrupted by the Second World War. After the end of the war, all-electronic methods of scanning and displaying images became standard. Several different standards for addition of color to transmitted images were developed with different regions using technically incompatible signal standards. Television broadcasting expanded rapidly after World War II, becoming an important mass medium for advertising, propaganda, and entertainment.
PAL-M is the analogue colour TV system used in Brazil since early 1972, making it the first South American country to broadcast in colour.
A number of experimental and broadcast pre World War II television systems were tested. The first ones were mechanical based and of very low resolution, sometimes with no sound. Later TV systems were electronic.
819-line was an analog monochrome TV system developed and used in France as television broadcast resumed after World War II. Transmissions started in 1949 and were active up to 1985, although limited to France, Belgium and Luxembourg. It is associated with CCIR System E and F.
Band I is a range of radio frequencies within the very high frequency (VHF) part of the electromagnetic spectrum. The first time there was defined "for simplicity" in Annex 1 of "Final acts of the European Broadcasting Conference in the VHF and UHF bands - Stockholm, 1961". Band I ranges from 47 to 68 MHz for the European Broadcasting Area, and from 54 to 88 MHz for the Americas and it is primarily used for television broadcasting in compliance with ITU Radio Regulations. With the transition to digital TV, most Band I transmitters have already been switched off.
Television in Portugal was introduced in 1956 by Radiotelevisão Portuguesa, which held the nationwide television monopoly until late 1992. Regular broadcasting was introduced on March 7, 1957. Colour transmissions were introduced on March 10, 1980.
High-definition television describes a television system which provides a substantially higher image resolution than the previous generation of technologies. The term has been used since at least 1933; 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.
441-line is the number of scan lines in some early electronic monochrome analog television systems. Systems with this number of lines were used with 25 interlaced frames per second in France from 1937 to 1956, Germany from 1939 to 1943, Italy from 1939 to 1940, as well as by RCA in the United States with 30 interlaced frames per second from 1938 to 1941. Broadcasts were planned in Finland for 1940, but eventually cancelled due to World War II. Some experiments with similar systems were carried out on the USSR in the 1930s and Japan in 1939.
RTL9 is a French-language Luxembourgish television channel shown in Luxembourg, France, Monaco, Africa and the French-speaking regions of Switzerland.
Guinea-Bissau Television is the state television of the African country of Guinea-Bissau. The headquarters are in the capital city of Bissau. The station's main transmitter is located in Nhacra and covers the Bissau metropolitan area. The system also includes two relay towers, one in the east of the country, in Gabu, and another in the south, in Catió.
The Central Television of the USSR was the state television broadcaster of the Soviet Union.
625-line is a late 1940s European analog standard-definition television resolution standard. It consists of a 625-line raster, with 576 lines carrying the visible image at 25 interlaced frames per second. It was eventually adopted by countries using 50 Hz utility frequency as regular TV broadcasts resumed after World War II. With the introduction of color television in the 1960s, it became associated with the PAL and SECAM analog color systems.
CCIR System E is an analog broadcast television system used in France and Monaco, associated with monochrome 819-line high resolution broadcasts. Transmissions started in 1949 and ended in 1985.
