Paper Info
Title
A New Defined Lower Bit Rate Amr Mode In Gsm And Wcdma Networks
Abstract
Adaptive Multi-Rate (AMR) codec can adaptively select one of eight modes according to the channel condition or the system load. AMR allows making a trade-off between voice capacity and the voice quality. In GSM networks, when the channel condition is worse than the threshold, the voice quality is unacceptable even using the lowest rate mode (4.75 kbps). In this paper, by compressing the AMR frame, a new defined lower bit rate AMR mode with 3.95 kbps is proposed to guarantee the voice quality in this case. The proposed mode is completely compatible with the specified AMR codec in standard. Moreover, this mode can be adopted in WCDMA networks. Compared with 12.2 kbps mode, this new one can increase the capacity by 135% and increase the coverage gain by 2.6 dB.
Year
DOI
Venue
2007
10.1109/VETECS.2007.159
2007 IEEE 65TH VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-6
Keywords
Field
DocType
adaptive multi-rate (AMR), WCDMA, GSM, quality of voice, capacity, wireless networks
Speech synthesis,GSM,Adaptive Multi-Rate audio codec,Computer science,Computer network,Communication channel,Multiuser detection,Electronic engineering,Decoding methods,Code division multiple access,Codec
Conference
ISSN
Citations 
PageRank 
1550-2252
0
0.34
References 
Authors
1
2
Name
Order
Citations
PageRank
Yifeng Guo1554.93
Geng-Sheng Kuo230031.06