Method for determining the quality of a speech signal

Details Method for determining the quality of a speech signal Method for determining the quality of a speech signal

2008-01-01

2008-01-01

{hacek over (S)}mits, Tälivaldis Ivars (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

Psychoacoustic

C704S200000

Reexamination Certificate

active

07315812

ABSTRACT:
Objective measurement methods and devices for predicting perceptual quality of speech signals degraded in speech processing/transporting systems have unreliable prediction results in cases where the degraded and reference signals show in between severe timbre differences. Improvement is achieved by applying a partial compensation step within in a signal processing stage using a frequency dependently clipped compensation factor for compensating power differences between the degraded and reference signals in the frequency domain. Preferably clipping values for clipping the compensation factor have larger frequency-dependency in a range of low frequencies with respect to a centre frequency of the human auditory system, than in a range of high frequencies.

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