A Variable Rate Voice Coder using LPC-10E
NAVAL RESEARCH LAB WASHINGTON DC COMMUNICATION SYSTEMS BRANCH
Pagination or Media Count:
This paper describes the current status of an ongoing research and development effort whose objective is a variable rate voice coder with a high degree of speech intelligibility and natural voice quality with an average throughput rate near 1200 bs. The voice coder described here is based on the DoD FS 1015 LPC-10 2400 bs vocoder. A method of silence detection and the use of variable size data frame formats to distinguish voiced and unvoiced frames are discussed. This voice coding technology is a critical component in supporting efficient integrated services over bandwidth constricted radio networks, satellite systems, and handheld portable communications devices.
- Numerical Mathematics
- Voice Communications
- Logistics, Military Facilities and Supplies