![]() ![]() Bradley at the University of Surrey in 1987. The DCT was adapted into the MDCT by J.P. It is a modification of the discrete cosine transform (DCT) algorithm, which was proposed by Nasir Ahmed in 1972 for image compression. The basis of the Dolby AC-3 multi-channel audio coding standard is the modified discrete cosine transform (MDCT), a lossy audio compression algorithm. It has since also been used for TV broadcast, radio broadcast via satellite, digital video streaming, DVDs, Blu-ray discs and game consoles. The first use of Dolby Digital was to provide digital sound in cinemas from 35 mm film prints. ![]() Called Dolby Stereo Digital until 1995, it is lossy compression (except for Dolby TrueHD). Dolby Digital, originally synonymous with Dolby AC-3, is the name for a family of audio compression technologies developed by Dolby Laboratories. ![]()
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