Very Low Data Rate Voice Communication

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Abstract:

The domain of very low data rate voice communication is not universally defined. For this discussion, the domain will be verbal communication at a maximum serial rate of a few hundred bits per seconds. Systems are ordered or under development which operate at 400 bps or less. Some areas of communication have a desperate need for very low rates. This compelling need arises from the laws of physics and the mathematical relationships inherent in the applications. Because of its traditionally higher data rate, digital voice hasnt been a practical choice for some of these areas until recently. Ill briefly describe a group of these applications in general and then cover the details in the next section. One application is using digital voice on narrow-band radio channels as in the typical 3kHz wide single sideband voice channel in the VHF bands. Another is jam-resistance where massive redundancy or unique operating techniques require a low rate. A third use is balancing the relative load in integrated voicedata systems. A related application is in disguising a voice channel as a data channel. A final application is in multiplexing of several users onto one channel. Reprints. RRH

Author(s):
Johnson, Ralph
Author Organization(s):
NAVAL OCEAN SYSTEMS CENTER SAN DIEGO CA
Descriptive Note:
Presentation paper
Supplementary Note:
Published in Proceedings of Speech Tech '87, p215-217 Apr 1987.
Annotation:
Reprint: Very Low Data Rate Voice Communication.
Pagination:
0006

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Task Number(s):
C3125
Project Number(s):
CC56
 Subject Terms
Joint Capability Areas:
JCA_6_Net Centric; JCA_6.1_Information Transport; JCA_3.2_Engagement; JCA_3_Force Application; JCA_3.2.2_Non-Kinetic Means; JCA_6.3.3_Spectrum Management; JCA_6.3_Net Management; JCA_3.2.1_Kinetic Means
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*DIGITAL SYSTEMS, *VOICE COMMUNICATIONS, *CHANNELS, *LOW RATE, *RADIO TRANSMISSION, *MULTIPLEXING, *DATA RATE, *COMMUNICATION AND RADIO SYSTEMS, *DATA TRANSMISSION SYSTEMS, *INFORMATION SYSTEMS, MATHEMATICS, NARROWBAND, VERY HIGH FREQUENCY, REDUNDANCY, BANDS(STRIPS), INTEGRATED SYSTEMS, REPRINTS, VERBAL BEHAVIOR, HIGH RATE
Field(s)/Group(s):
Radio Communications, Voice Communications
Keyword(s):
PE63131M, WUDN888554
Report Date:
1989 Sep 01