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1200 bps Vocoder
Overview
SPIRIT 1200 bps vocoder is based on the classic LPC model, but it utilizes Mixed Multi-Band Excitation (MMBE) model for excitation signal that ensures correct transmission of all speech signals with tone, noise and mixed spectrum components. It can be effectively used in all applications where storage capacity and/or bandwidth are limited.
Features
Relatively high speech quality (MOS about 3.0)
1200 bps encoded bit stream rate
Frame size 40 ms
Algorithmic delay 60 ms
Automatic built-in Frame Synchronization and Comfort Noise Generation (CNG)
Direct interface with PCM 8 KHz sampled data.
Very simple application interface
eXpressDSP compliant. Code is reentrant, supports multithreading and dynamic memory allocation
