公开(公告)号：DE3174560D1

公开(公告)日：1986-06-12

申请号：DE3174560

申请日：1981-07-28

Applicant: IBM ,  IBM FRANCE

Inventor： GALAND CLAUDE ,  NUSSBAUMER HENRI

IPC: G10L19/02 ,  H03M7/30 ,  H04B1/66 ,  H04B14/04 ,  H04J99/00 ,  H04M11/00 ,  H04M11/06

Abstract: The method allows voice and data information to be concentrated over a reduced number of telephone lines. It consists mainly in processing each voice signal to extract therefrom a so-called analog base band signal and digitally coded characteristic parameters. Said parameters are then multiplexed with pure data and submitted to a modulation operation. The analog signal resulting from the modulation is then added to the base band before being transmitted over a telephone line.