[an error occurred while processing this directive]
4800 bps Vocoder
Overview
SPIRIT 4800 bps vocoder implements a proprietary Improved Code-Excited
Linear Prediction (ICELP) algorithm, based on well-known CELP model and
strongly optimized, ensuring significant improvement of speech quality at low
computational complexity. It can be effectively used in all applications where
storage capacity and/or bandwidth are limited.
Features
High speech quality (MOS about 3.7)
4800 bps encoded bit stream rate
Frame size 30 ms
Algorithmic delay 37.5 ms
Automatic built-in Frame Synchronization and Comfort Noise Generation (CNG)
Direct interface with PCM 8 KHz sampled data
Very simple application interface
Code is reentrant, supports multithreading and dynamic memory allocation
