This paper presents the modified multiband excitation model used for speech coding. In many MBE model coders, speech quality is degraded when incorrect voicing decisions are made, particularly for high-pitched female speakers. The MMBE addresses this issue with a modified voiced/unvoiced decision algorithm and a more robust pitch estimate. The listening quality of speech produced using the MMBE model is superior to the FS-1016 CELP coder and is at least comparable with the new 2400 bps MELP coder chosen as the new 2400 bps Federal Standard.
['Michele L. Jamrozik', 'John N. Gowdy']
Modified multiband excitation model at 2400 bps