| 摘要 |
PURPOSE:To acquire synchronization in a short period even on the condition of mixing the detection of synchronizing patterns out of a regular position. CONSTITUTION:Each time a synchronizing pattern detection signal S4 is impressed from a synchronizing pattern detection part 1, a synchronization acquiring operation is started in the order of frame synchronizing modules 2a-2c, and a signal from the module first acquiring the synchronization is outputted through a gate circuit 4 as a synchronization establish signal S10 for the entire frame synchronizing circuit. When a single module is used, only the synchronization acquiring operated is just advanced for the further following synchronizing pattern after it is recognized that the preceding synchronizing pattern is detected at the regular position and since the synchronization acquiring operations can be parallelly advanced by the plural modules, however, useless wait time can be saved so as to acquire synchronization in a short period. |
