The history of 4K TV

Starting in the 1990s, some standard-definition televisions Start with a 16:9 or 1.78:1 aspect ratio, which is almost the same as a 1.85:1 movie widescreen. By the beginning of the 21st century, new high-definition televisions also adopted a 16:9 aspect ratio, and greatly increased the definition from 720x576 (PAL) in the standard definition era to 1920x1080, and adopted multi-channel surround sound. Audio, so that the aspect ratio and information content of HDTV is very close to that of 35mm film cinema release copies. In the era of competition between film and standard definition TV, film and TV have their own advantages and form a certain balance, thus maintaining the situation of common development. From the technical level, watching film has the advantage of much larger comprehensive information than TV. After the introduction of high-definition technology to TV, its definition has reached a level close to 2K, breaking the original balance between film and TV, and TV once again poses a threat to film. To meet the challenges of high-definition television, movies must introduce new technical standards in order to maintain a technological edge over television. So on July 1, 2004, the Digital Cinema Initiative, which is composed of seven major Hollywood film companies, revised and launched its technical document 4. 0 Industry standard, the specified digital cinema definition is divided into two levels, namely DCI 2K (2048x1080, 24 frames per second or 48 frames per second) and DCI 4K (4096x2160 pixels, 24 frames per second), of which the information of DCI 4K (4096x2160) The amount is more than 4 times that of high-definition TV. 4K thus ensures the technical advantage of digital cinema over HDTV, which is absolutely needed in the future when cinema competes with TV. In response to the relevant DCI documents, Sony launched the SRX-110/105 digital cinema 4K projector based on its SXRD (Silicon X-tal Reflective Display) silicon crystal reflective display device technology in October 2004. However, due to the limitations of related technologies such as cameras and storage devices at that time, there was almost no ability in the industry to produce a large number of 4K resolution movies, so the SRX-110/105 could only be used for engineering projection and virtual presentations at that time. In addition, the Japan Broadcasting Association NHK, which has participated in the International Telecommunication Union (ITU) to formulate international standards related to the TV industry, also has its own standards for the next generation of ultra-high-definition TVs, called Super Hi-Vision , and has exhibited related equipment at international exhibitions many times, but the equipment is quite large and very inconvenient. There are relatively few 4K film sources in China, and 4K TVs are useless. How to watch 4K films has become a more important topic. LG adopts the True 4K image processing engine, which can improve the picture quality through adaptive optimization. Technology, perform complex calculations, analysis and optimization on ordinary definition pictures, so that the picture is closer to ultra-high-definition picture quality, so that 4K TV can get rid of the plight of lag and insufficient film source.

The development and history of television

The television set was independently invented by Ferro Farnsworth, Veratimir Sforokin and Baird, but the TV invented by the three was different, Baird (his full name is John Logie Baird's television was mechanically scanned television, and the television of Ferro Farnsworth and Veratimir Sforokin was electronic television. The image of the puppet "scanned" by Scotsman John Logie Baird in an experiment in London on October 2, 1925 is often seen as a sign of the birth of television, which he called "television". father". However, this view is controversial; because, also in that year, the Russian Vladimir Zworykin (who was at Westinghouse showed his TV to his boss) system) and Ferro Farnsworth in 1927, respectively, invented television. Despite the same time period, the television systems of John Logie Baird and Vladimir Zworykin and Filo Farnsworth were very different. John Logie Baird's television system is historically referred to as mechanical television, while the television systems of Veratimir Sforokin and Ferro Farnsworth are referred to as electronic TV. This difference is mainly due to the difference in transmission and reception principles. The first television set appeared in 1924, invented by the British electrical engineer John Baird. By 1928, RCA television station in the United States took the lead in broadcasting the first TV series "FelixTheCat". Since then, television began to change human beings. life, information dissemination and way of thinking. Since then, mankind has entered the age of television. From black and white to color, from analog to digital, from spherical to flat. The development of television is complex. There were many people doing the same research at almost the same time. In 1928 Baird's company produced the Baird C-type television, the world's first mass-produced television. In 1954, Texas Instruments Corporation (RCA) developed the first all-transistor TV receiver RCACT-100. This TV used the NTSC standard and was priced at $1,000 in Westinghouse in the United States. At the time, TV picture tubes were very expensive, and RCA was a loss-making business with every TV, but when new samples came on the market, they recovered twice the profit in a very short time.

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