| 摘要 |
PURPOSE:To protect dropout and to prevent malfunction by feeding back an output of a counter controlled by a synchronizing pattern to an input side and deciding the phase of the synchronizing pattern by a jitter compensation window generator operated by said output. CONSTITUTION:When a serial digital signal is inputted to a terminal T1, a synchronizing pattern detecting gate 2 detects the synchronizing pattern via a serial/parallel converter 1. A counter 3A is controlled by the synchronizing pattern, the output is fed back to the input side of the counter and inputted to the jitter compensating window generator 9. Since no output is obtained if the next synchronizing pattern is not fed to the window generated after about 1 frame from the synchronizing pattern at the jitter compensation window generator 9, no output is obtained even if the same pattern as the synchronizing pattern is generated intermediately. Since the output of the counter is fed back, the output is reset at each frame and the dropout is protected. |
