公开(公告)号：US3916107A

公开(公告)日：1975-10-28

申请号：US29567472

申请日：1972-10-06

Applicant: BELL TELEPHONE LABOR INC

Inventor： MCDONALD HENRY STANTON

IPC: H03M7/00 ,  H04J3/00 ,  H04J3/06 ,  H04L5/22 ,  H04L25/05

CPC classification number: H03M7/3048 ,  H04J3/00 ,  H04J3/06 ,  H04J3/062 ,  H04L25/05

Abstract: Time division multiplexed pulse code modulated digital character signals received from a transmission medium are demultiplexed and converted into respective delta modulation signals in accordance with a first set of time base information derived from the pulse code modulated signals. This operation removes pulse code character and time division frame time restrictions. The delta modulated signals are recoded to a predetermined pulse code modulated format, such as differential pulse code modulation, in accordance with a second set of time base information for appropriate further processing or transmission.