We have implemented APCO Project 25 Dual-Rate Vocoder (7200/3600 bps) in exact accordance with following documents:
- TIA/EIA-102.BABA Vocoder Description (December 2003)
- APCO Project 25 Half-Rate Vocoder Annex (July 2008).
With our implementation of the Dual-Rate Vocoder you start Phase 2 of the APCO 25 without large expenses.