A new objective quality measure for speech-coding systems based on the estimation of their nonlinear properties. - Ulrich Halka (ICASSP, 1991)

Speech-model processes for objective quality measurements of speech-coding systems. - Ulrich Halka (EUROSPEECH, 1991)

A new approach to objective quality-measures based on attribute-matching. - Ulrich Halka; Ulrich Heute (Speech Commun., 1992)

Objektive Qualitätsbeurteilung von Sprachkodierverfahren unter Anwendung von Sprachmodellprozessen. - Ulrich Halka (1993)