LSP Transcoding Between G729A and GSM AMR

"This paper presents a new method for Linear Spectrum Pair transcoding between G.729A and GSM AMR codecs. The transcoding in the bitstream domain gives better quality and lower complexity than the conventional method in the speech domain. Several simulation results are presented using Perceptual Quality Speech Measure showing a gain of about 0.45 in this measure. This scheme is part of a complete transcoding process under development."