公开(公告)号：FR2702907A1

公开(公告)日：1994-09-23

申请号：FR9403202

申请日：1994-03-18

Applicant: TELECOMMUNICATIONS ELECT ,  KOREA TELECOMMUNICATION

Inventor： KIM YOUNG SUP ,  CHOI SONG IN ,  PARK HONG SHIK

IPC: H04K1/04 ,  H04L9/12 ,  H04L9/22 ,  H04Q3/00

Abstract: The invention relates to a parallel, distributed, sample-decrypter for a cell-based ATM physical layer, including a PRBS generator (22) intended to generate an 8-bit random number in order to execute a generator polynomial given by x + X + 1, a decrypter (21) intended to add 8 reception data bits to the 8 bits of the random number and deliver the decrypted data bits, and a sample processor (23) intended to extract, as first and second samples, 2 bits of the 8-bit random number in response to external synchronous clock and sampling clock signals, to extract, as PRBS samples from a sender, first and second highest-order bits of a syndrome signal originating from a cell delineation part in response to the two clock signals, to compare the first and second samples and the first and second highest-order bits with each other, and to deliver first and second synchronous signals depending on the result of the comparison.