Patent ID: 6728968
Filing Date: 2004-04-27
Classification: H04N

Abstract:
A method for decreasing upward-joining-noise in a two-way communication system connected by a plurality of transmission lines between a center device and a plurality of subscriber terminals, said upward-joining-noise decreasing method comprising the steps of:in an upward-signal-inputting position of said center device, (a) measuring a desired to undesired signal ratio of each of a plurality of upward signals inputted from the plurality of transmission lines; (b) determining whether said measured desired to undesired signal ratio of each inputted upward signal is greater than a predetermined value; (c) controlling a an output level for each inputted upward signal based on a result obtained from said determining step (b); and (d) adjusting said output level for each inputted upward signal according to said controlling step (c).