| 摘要 |
The invention comes within the field of half echo-suppressor for four-wire telephone lines and relates more particularly to the transmitted speech detector, said suppressor comprising an accumulator for accumulating characteristic indices of the samples, to control of the blocking element in the send channel depending on the accumulated value. In accordance with the invention, there is provided at least one digital comparator with a threshold, which receives the content of the accumulator and whose threshold is fixed between the limits of the accumulator. The blocking element can therefore be controlled with several operation times and via different hold circuits. |
