Centuries: 19th century - 20th century - 21st century
Decades: 1880s 1890s 1900s 1910s 1920s - 1930s - 1940s 1950s 1960s 1970s 1980s
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... for perceptual coding of audio signals. The standard defines three "layers," or levels of complexity, of MPEG audio coding.
Procedures for testing ...
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