公开(公告)号：EP0703708A3

公开(公告)日：1997-11-19

申请号：EP95306491.2

申请日：1995-09-14

申请人： AT&T Corp.

发明人： Pladek, Robert B.

IPC分类号： H04N7/04

CPC分类号： H04H60/04 ,  H03G3/005 ,  H04N5/38 ,  H04N7/04 ,  H04N9/802

摘要： 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.

公开(公告)号：EP0703708A2

公开(公告)日：1996-03-27

申请号：EP95306491.2

申请日：1995-09-14

申请人： AT&T Corp.

发明人： Pladek, Robert B.

IPC分类号： H04N7/04

CPC分类号： H04H60/04 ,  H03G3/005 ,  H04N5/38 ,  H04N7/04 ,  H04N9/802

摘要： 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.

摘要翻译： 为了防止特定的传输设备（未示出）将低级音频信号（8）人为地增加到预定的允许电平，首先将这些信号与具有预定频率的稳定信号（15）相加（形成复合音频） 信号（16）。 此外，稳定信号具有防止在由传输设备处理复合信号期间可能人为地施加在复合信号上的信号电平的任何增加的电平。 一旦复合信号被如此处理，则从其中去除稳定信号，并将原始音频信号输出到相关联的传输介质。