As part of its standardization process, the MPEG NBC (non-backwards compatible) multichannel audio coding algorithm was submitted for formal subjective testing in 1996 September. The tests were carried out jointly at two test sites: the BBC and NHK. The report was submitted to the Motion Picture Expert Group (MPEG) in 1996 November. This paper describes the design of these tests, the preparations required, and the results obtained for each of the codecs tested.
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