The basic audio quality of 5.1 multichannel audio reproduction was evaluated subjectively under different technical conditions. The resulting database of subjective responses was used to develop a multichannel audio quality expert system. There are three aims of this development: 1) to predict audio quality as a function of individual channel bandwidth; 2) to predict audio quality as a function of selected down-mix algorithms; and 3) to find the optimum band-limitation algorithm or down-mix algorithm for a given total transmission bandwidth of a multichannel audio signal. Results indicate a close correspondence between predicted and actual quality ratings. It is intended that the final version of the quality expert system will be suitable as a decision-making aid for broadcasters and codec designers.
Zielinski, Slawomir K.; Rumsey, Francis; Kassier, Rafael; Bech, Søren
Affiliation: University of Surrey, Guildford, UK
JAES Volume 53 Issue 1/2 pp. 4-21; February 2005
Publication Date: January 15, 2005
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