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Measuring the Coding Margin of Perceptual Codecs with the Difference Signal

Inaudible impairments of impairments near the threshold of audibility require a new method to assess the quality. A variable amplification of the impairments to provide the detection can be realized with the help of the difference signal. In a large listening test, the coding margin for 14 test items was measured. A time varying filter bank to modify the difference signal and to enhance the listening conditions is described.

Author: Feiten, Bernhard
Affiliation: Deutsche Telekom, Technologiezentrum, Berlin, Germany
AES Convention:102 (March 1997) Paper Number:4417 Import into BibTeX
Subject:Audio Coding

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