Multi channel echo elimination devices and the method of the number of variable channels

摘要

Topic This invention, with CD, the case where the audio signal of C channels is played back D in the audio signal transmission system for the channel, regards the device and method in order to do echo elimination. As for one applied example, the speaker to whom variable number speaks, corresponding to those seat positions, it is the video conference where being played back threely-dimensional is required. The topic which it tries to solve in the case where there is the correlation where the speaker signal is strong, it is trick of convergence of ecad echo elimination.SolutionsAt the time of this inventing, vis-a-vis the audio signal, profitably the pretreatment which does correlation removal (V1,....Choosing C output signals in these pretreatment units, VD) in addition to the widely known measure which is administered, with the channel coupler (5), the speaker (L1,....It is something which, LD) it distributes, at that time plays back some signal, with the plural speakers. As a solution method of this topic, it is on other hand, from D to reduce the channel in C, with another side, it is to administer adaptation adjustment to just these C signals.