Accession Number : ADD010630

Title :   Adaptive Quantizer for Acoustic Binary Information Transmission.

Descriptive Note : Patent,


Personal Author(s) : Kolesar,R R ; Rickard,J T ; Zeidler,J H

Report Date : 26 Apr 1983

Pagination or Media Count : 6

Abstract : An apparatus and technique reduces the data transmission rate required to transmit acoustic signals from undersea sensors to remote monitoring locations without degrading the surveillance information content of the signals. The signals are digitized and fed to an adaptive line enhancer (Wiener filter) which processes them so that a fast Fourier transform (Karhunen-Loeve approximation) coefficient generator can feed representative signals to a programmable quantizer and a signal averager. When significant shifts are detected in the fast Fourier transform coefficient variances, responsive signals are generated by the programmable quantizer for adaptive bit allocation. An interconnected multiplexer transmits multiplexed signals to the remote monitoring station where the inverse of the foregoing allows an analysis of the acoustic signals being monitored. (Author)

Descriptors :   *Patents, *Analog to digital converters, *Quantization, *Acoustic communications, Acoustic signals, Data transmission systems, Data rate, Undersea surveillance, Fast fourier transforms, Data compression, Multiplexing

Subject Categories : Electrical and Electronic Equipment
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE