Estimation Model for the Speech-Quality Dimension "Directness / Frequency Content"

In this paper, an instrumental method for estimating the quality-relevant dimension "directness / frequency content" (DF) is presented. Apart from the perceptual dimensions "continuity" and "noisiness", DF has been identified to be of crucial importance for the listening-quality of today's telecommunication networks [1], especially if it comes to linear distortions. The presented work is part of a framework for a signal-based approach to measure the quality of transmitted speech on the basis of perceptual dimensions [2].