Accession Number:

ADA464963

Title:

A Variable Rate Voice Coder using LPC-10E

Descriptive Note:

Technical Memorandum

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC COMMUNICATION SYSTEMS BRANCH

Personal Author(s):

Report Date:

1994-07-12

Pagination or Media Count:

3.0

Abstract:

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.

Subject Categories:

  • Numerical Mathematics
  • Voice Communications
  • Logistics, Military Facilities and Supplies

Distribution Statement:

APPROVED FOR PUBLIC RELEASE