With the advent of low bit-rate coding in studio and consumer applications, multiple generations (tandem) coding becomes reality. It is reported that depending on the algorithms and bit rates employed, the final sound quality may decrease significantly. The noise-to-mask ratio (NMR) perceptual measurement is capable of evaluating the margin toward audibility. The results of numerous measurements on typical tandem combinations will be presented, and the consequences on multiple generations coding will be discussed.

Authors: Keyhl, Michael; Herre, Jürgen; Schmidmer, Christian
Affiliation: Fraunhofer Institut fur Integrierte Schaltungen, Erlangen, Germany
AES Convention: 96 (February 1994) Paper Number: 3803
Publication Date: February 1, 1994 Import into BibTeX
Subject: Measurement Technique and Instrumentation
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=6429

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