By Topic

An 800 Bps real-time voice coding system based on efficient encoding techniques

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Carter, T. ; TRW Defense and Space Systems Group, Redondo Beach, CA, USA ; Dlugos, D. ; LeDoux, D.

A real-time 800 bit per second fixed-rate voice communication system has been developed and implemented on the TRW Microprogrammable Voice Processor (MVP) using 11K words of memory. DRT and other test results indicate acceptable intelligibility and communicability. This low data rate is achieved by an algorithm which efficiently encodes the parameters of 2400 bps LPC. This paper describes the essential components of the algorithm along with details of implementation and test results. Rather than attempt formant tracking, as many previous approaches to this data rate have done, this new algorithm applies a number of data reduction schemes, common in other types of communication systems, to achieve the desired data rate. These schemes include adaptive DPCM, Karhunen-Loeve transformation, statistically optimized quantization, and dynamic bit allocations.

Published in:

Acoustics, Speech, and Signal Processing, IEEE International Conference on ICASSP '82.  (Volume:7 )

Date of Conference:

May 1982