Accession Number:

ADA232352

Title:

High-Quality 800-b/s Voice Processing Algorithm.

Descriptive Note:

Interim rept.

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s):

Report Date:

1991-02-25

Pagination or Media Count:

41.0

Abstract:

The 2400-bs linear predictive coder LPC is currently being widely deployed to support tactical voice communication over narrowband channels. However, there is a need for lower-data-rate voice encoders for special applications improved performance in high-bit-error conditions, low- probability-of-intercept LPI voice communications, and integrated voicedata systems. As a result of continued research, the intelligibility of very-low- data-rate 600 to 800 bs voice processors has steadily improved, from the upper 70s about a decade ago to the middle 80s in recent years. This report presents a new 800-bs voice-encoding method that produces an intelligibility score of 92 measured by the Diagnostic Rhyme Test DRT. This high score compares favorably with that attained by the 2400-bs LPC.

Subject Categories:

  • Voice Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE