Improving the 2.4 Kb/s Military Standard MELP (MS-MELP) Coder Using Pitch-Synchronous Analysis and Synthesis Techniques
Ali Erdem Ertan, Thomas P. Barnwell III · 2006
In this paper, we presented new pitch-synchronous analysis and synthesis methods for improving the quality of the 2.4 kb/s U.S. military standard-MELP coder. These improvements include: a new pitch-estimation algorithm; a pitch-cycle segmentation algorithm; an adaptive linear-prediction analysis and Fourier series computation selection method; and speech synthesis with fractional cycle lengths. In listening tests, we found that these new techniques improve the quality for female speech significantly and they completely eliminate the quality difference for the MS-MELP coder between male and female talkers.