H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 3/23 (2006.01)
Patent
CA 2413436
The present invention relates to an echo canceling method and apparatus for simultaneously erasing echoes produced on a plurality of transmission paths. The invention provides an echo canceling method and apparatus for multiplexed lines which require a short convergence time and a less amount of operations. The echo canceling apparatus has a control circuit which receives information on convergence degrees and input signal intensities from a plurality of adaptive filters to distribute a number of coefficient updates to each adaptive filter corresponding to the information.
L'invention concerne un procédé et un dispositif d'annulation d'écho permettant d'annuler simultanément des échos se produisant dans plusieurs lignes de transmission. Le procédé et le dispositif décrits dans cette invention permettent à des lignes multiplex d'écourter un temps de convergence et de réduire le nombre des opérations. Le dispositif d'annulation d'écho comprend un circuit de commande (70) permettant de recevoir des informations relatives à un degré de convergence et des informations relatives à l'intensité d'un signal d'entrée provenant d'une multitude de filtres adaptatifs (80, 81, 83) de manière à répartir les nombres correspondants de coefficients de mise à jour aux filtres adaptatifs.
Corporation Nec
G. Ronald Bell & Associates
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