Study on Performance of Multilevel Coded AMR-WB over Wireless Fading Channel
Jiangtao Fu · Communications technology · 2009
According to the different important classes of AMR-WB voice coded data frame,a transmission method of multi-level coded AMR-WB voice data over Rayleigh fading channel is proposed.The unequal error protection capability in multi-level coding is used to improve the quality of reconstructed voice.The multi-level coding is used to realize the high protection capability for the class A data and the low protection capability for the class B and class C data in AMR-WB data frame.The perceptual quality of reconstructed AMR-WB voice over fading channel could be improved by multi-level coding.The quality improvement of the reconstructed voice is more remarkable for low rate coding.