At present there are no adequate means for objective quality assessment of low bit-rate audio codecs. Subjective assessments or listening tests will play an important role in the evaluation of these codecs for at least a few more years. Three large tests for ISO MPEG/Audio and the very extensive tests performed by CCIR TG 10/2 were all performed with a methodology-Triple Stimulus Hidden Reference-originally developed and proposed by the Swedish Broadcasting Corporation. This paper describes the method and discusses different factors that have to be taken into account when a subjective assessment is to be performed. Results from different tests are compared.

Author: Grewin, Christer
Affiliation: Swedish Broadcasting Corporation, Transmission Development Department, Stockholm, Sweden
AES Conference: 12th International Conference: The Perception of Reproduced Sound (June 1993)
Paper Number: 12-008
Publication Date: June 1, 1993
Subject: Perception of Reproduced Sound

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