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Bipolar encoding
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== Historical uses == [[B-MAC]], and essentially all family members of the [[Multiplexed Analogue Components]] Television Transmission family used ''Duobinary'' to encode the digital audio, teletext, closed captioning and selective access for distribution. Because of the way Duobinary was coupled to the [[NICAM]] like digital audio subsystems for the MAC family, up to 50% of data reduction was possible in both Stereo and Mono transmission modes. At least with some data transmission systems, duobinary can perform lossless data reduction though this has seldom been utilized in practice.
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