| 摘要 |
<p>To prevent particular transmission equipment (not shown) from artificially increasing low level audio signals (8) to a predetermined allowable level, such signals are first summed (in 15) with a stabilization signal (32) having a predetermined frequency to form a composite audio signal (16). Moreover, the stabilization signal has a level that prevents any increase in signal level that may be artificially imposed on the composite signal during the processing of the composite signal by the transmission equipment. Once the composite signal has been so processed, then the stabilization signal is removed therefrom and the original audio signal is outputted to associated transmission media. <IMAGE></p> |
