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What is UMTS-AMR Speech Quality Control Methods about?

This document summarizes a paper about quality control for speech channels using the Adaptive Multi-Rate (AMR) speech codec in UMTS networks. It discusses using AMR mode switching based on transmission quality measurements to optimize speech quality under varying channel conditions. The paper presents a method for AMR mode switching that uses softbit measurements from the Viterbi decoder to estimate transmission quality and optimize thresholds based on the PESQ speech quality metric. It also describes devel

Author

payam12

Language

EN