Accession Number : ADD000985
Title : Method and System for Transmission of Companded Pulse Code Modulated Information.
Descriptive Note : Patent,
Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON D C
Personal Author(s) : Phyfe,Douglas L
Report Date : 29 Sep 1964
Pagination or Media Count : 4
Abstract : The patent provides a method and system for companding ('compressing' the levels which represent small difference voltages and 'expanding' the levels which represent large difference voltages) the coded difference levels in a delta pulse code modulation system. It provides a companded delta pulse code modulation system wherein the signal-to-noise ratio is higher than has been attained in previous systems. It still provides a delta pulse code modulation system which uses only linear elements.
Descriptors : *Pulse communications, *Patents, Pulse code modulation, Pulse compression, Digital systems, Data transmission systems
Subject Categories : Non-radio Communications
Distribution Statement : APPROVED FOR PUBLIC RELEASE