FRAME SYNCHRONIZING SYSTEM

摘要

PURPOSE:To improve transmission efficiency without the need of the transmission of a frame synchronizing signal separately from a data signal by using in common a parity check bit for the detection of frame synchronizing position. CONSTITUTION:A signal series whose frame consists of a 1 word data comprising plural bits and its patiry check bit is sent from a transmission side. A reception signal is inputted to a pattern detection circuit 13 comprising the cascade connection of shift registers 14-1, 14-2 having 1-frame of word length is inputted at the reception side. Then the parity check circuit 12 applied parity check to a data series in the shift registers 14-1, 14-2 of each stage every time of one bit shift. When no parity error exists as to all of the shift registers 14-1, 14-2 of each stage, it is detected as the frame synchronizing location.