Patent ID: 6499009
Filing Date: 2002-12-24
Classification: G10L,H04L

Abstract:
In a telecommunications network, wherein a first speech signal is transported across a transmission chain to a receiving entity, a method for estimating speech quality comprising the steps of:at the receiving entity, aligning each of a number of synchronization points along the first speech signal with a corresponding one of a number of synchronization points along a reference speech signal; determining whether any portions of the first speech signal reflect an intermittent delay variation, based on said alignment of the synchronization points along the first speech signal and the synchronization points along the reference speech signal; determining a level of continuous delay variation exhibited by the first speech signal; adjusting the first speech signal or the reference speech signal to account for the level of continuous delay variation exhibited by the first speech signal and for any portions of the first speech signal that reflect an intermittent delay variation; comparing the first speech signal to the reference speech signal; and estimating speech quality based on said comparison of the first speech signal to the reference speech signal.