公开(公告)号：JPH07170200A

公开(公告)日：1995-07-04

申请号：JP22032294

申请日：1994-09-14

Applicant: KOREA ELECTRONICS TELECOMM ,  KOREA TELECOMMUNICATION

Inventor： I BOMU CHIYORU ,  IMU SON YORU ,  KIMU JIYON SHIKI

IPC: H03M13/00 ,  H03M13/09 ,  H03M13/33 ,  H04L1/00 ,  H04L7/00

Abstract: PURPOSE: To identify the boundary of a block only by performing the arithmetic operation of the newly added number of bytes or the number of bytes removed from the block, and outputs byte-synchronized and block-synchronized data before the starting point of the block. CONSTITUTION: A block synchronization identifying part 24 detects 8 syndrome outputs from an arithmetic part 23 with each byte time interval in a block synchronizing state. Then, when results whose remainders are 0 are outputted continuously (j) times from a syndrome output terminal, a block synchronizing state is declared, and the block synchronizing state is outputted. Also, when results whose remainders are not 0 are outputted continuously (i) times from the syndrome output terminal which detects the block synchronizing state, the block asynchronizing state is restored, and the state is outputted, and a byte unit detection process is executed. Moreover, the syndrome output which detects the block synchronizing state is identified, and outputted as 3 bit data so that a point of time when the remainder 0 is periodically outputted can be synchronized with the outputted byte interval.