Transmission system using differential pulse code modulation with adaptive prediction

摘要: ABSTRACT: In this transmission system using differential PCM, the local decoder incorporated in loop of encoder and remote comprise identical filters (5) (15) each constituted by a cascade arrangement several filtering setions (Fl-FN) first and/or second order; section may have one or two con-trollable coefficients, which are modified at sampl-ing instant modification term depends upon product difference signal (e) produced gradient differencesignal with respect to controllable coefficient. When filter-ing sections recursive, gradients obtained applying corresponding dif-ference recursive (F'l-F'N). non-recursive (Hl-HL) used, calculations (H'l-H'L) transfer function inverse that (Hl-HL). This is in-tended be used for signals tele-phone networks.