An Investigation into the Performance Enhancement and Salient Features of AMR-WB Speech Codec Used in GSM Communication
نویسندگان
چکیده
The 3rd Generation Partnership Project (3GPP) along with European Telecommunication Standard Institute (ETSI) recommended new speech coding scheme, called Adaptive Multi Rate (AMR) in 2000 and 2001. The proposed scheme has two variants: AMR-Narrowband (AMR-NB) and AMR-WB (AMRWideband). The speech quality of AMR-WB in GSM systems is remarkably high compared with that of AMR-NB speech codec because it encompasses wider bandwidth of the speech signal, 50-7000 Hz, instead of 200-3400 Hz in AMR-NB. But there are always possibilities for improvement. This paper investigates the salient features of AMR-WM codec and various possibilities for further enhancement in its speech quality. Two algorithms are recommended for incorporation into the standard AMR-WB to achieve this goal.
منابع مشابه
The adaptive multirate wideband speech codec (AMR-WB)
This paper describes the Adaptive Multirate Wideband (AMR-WB) speech codec recently selected by the Third Generation Partnership Project (3GPP) for GSM and the third generation mobile communication WCDMA system for providing wideband speech services. The AMR-WB speech codec algorithm was selected in December 2000 and the corresponding specifications were approved in March 2001. The AMR-WB codec...
متن کاملObjective study of the performance degradation in emotion recognition through the AMR-WB+ codec
Research in speech emotion recognition often involves features that are extracted in lab settings or scenarios where speech quality is high. However, a great deal of communication occurs through speech codecs, which alters the speech signal and features extracted from it. The purpose of this study is to report on the performance degradation in emotion recognition systems when speech is passed t...
متن کاملAMR wideband codec - leap in mobile communication voice quality
The Third Generation Partnership Project (3GPP) and European Telecommunications Standards Institute (ETSI) have carried out development and standardisation of a wideband speech codec for GSM and the third generation mobile communication WCDMA system since 1999. The Adaptive Multi-Rate Wideband (AMR-WB) codec algorithm was selected in December 2000, and the corresponding specifications were appr...
متن کاملAn Improved Packet Loss Concealment Method for Mobile Audio Coding
In this paper, we propose an improved packet loss concealment (PLC) algorithm for ACELP-based speech coders in order to improve the quality of decoded speech at the receiver. Conventional receiver-based PLC algorithms in the AMR-WB+ speech codec are usually based on speech correlations to reconstruct the decoded speech of the lost frames by using parameter information obtained from the previous...
متن کاملEffect of Speech Compression on the Automatic Recognition of Emotions
This paper investigates the effects of standard speech compression techniques on the accuracy of automatic emotion recognition. Effects of Adaptive Multi-Rates (AMR), Adaptive Multi-Rate Wideband (AMR-WB) and Extended Adaptive Multi-Rate Wideband (AMR-WB+) speech codecs were compared against emotion recognition from uncompressed speech. The recognition methods included techniques based on three...
متن کامل