The Performance of the ITU-T P.862.1 Standard (PESQ-LQO) on AMR Live Networks
ثبت نشده
چکیده
A comprehensive test has been performed in order to evaluate the PESQ performance on AMR live networks. The test was necessitated by the fact that the speech quality standard has not been tested and validated on AMR live networks yet. 1. Myth and reality about the AMR codec’s expected speech quality The operability of 3G networks is complex. It has been demonstrated that some estimated performance levels described in 3GPP documents are only met with great difficulty or at lower values than expected. The functionality of the AMR codec within a live UMTS network might be one of these cases. Designed to ensure high capacity, both the AMR FR and more importantly the AMR-HR codecs are expected to perform higher speech quality than the EFR codec, especially at low C/I values (below 6-8dB). The 3GPP document [1] provides some informative speech quality values for both the AMRFR and the HR codecs. These values have been obtained based on a single listening test on different simulated RF scenarios. The results presented in the 3GPP document are shown in Charts 1 and 2. 4 (12) Rev A © Ascom 2009 Open
منابع مشابه
Performance analysis and comparison of PESQ and 3SQM in live 3G mobile networks
The ITU-T’s Perceptual Evaluation of Speech Quality (PESQ) is an intrusive objective assessment tool that has been widely used in telecommunications and IP networks. 3SQM is an ITU-T standard for single-sided non-intrusive quality measurement. The purpose of this paper is to investigate the accuracy of PESQ and 3SQM in evaluating voice quality over live 3G networks. We set up a testbed based on...
متن کاملITU-T Rec. P.862.3 (11/2007) Application guide for objective quality measurement based on Recommendations P.862, P.862.1 and P.862.2
متن کامل
Perceptual Evaluation of Speech Quality ( PESQ ) , the new ITU standard for end - to - end speech quality assessment . Part I – Time alignment
A new model for perceptual evaluation of speech quality (PESQ) was recently standardised by the ITU-T as recommendation P.862. Unlike previous codec assessment models, such as PSQM and MNB (ITU-T P.861), PESQ is able to predict subjective quality with good correlation in a very wide range of conditions, that may include coding distortions, errors, noise, filtering, delay and variable delay. Thi...
متن کاملA PESQ-based Performance Prediction Method for Noisy Speech Recognition
This paper investigates the relationship between the word accuracy and the PESQ (ITU-T Recommendation P.862) score, and the availability of the artificial voice (ITU-T Recommendation P.50) for calculating the PESQ score. For this purpose, recognition experiments using four noise reduction algorithms were performed on the AURORA-2J connected digit recognition task. These results confirmed that t...
متن کاملPESQ and 3SQM measurement of voice quality over live 3G networks
The purpose of this paper is to investigate the accuracy of PESQ and 3SQM in predicting voice quality over live 3G networks. We set up an Asterisk-based testbed to measure voice quality over 3G mobile networks. 192 experiments with speech samples from the ITU-T database were recorded via 3G mobile phones and the results of the objective measurements were analyzed. We further selected 30 samples...
متن کامل