| 摘要 |
Disclosed is a synchronization signal detecting apparatus that includes a window generating circuit for generating a synchronization detecting window, a re-synchronization window generating circuit for generating a re-synchronization window, and a synchronization detecting circuit for generating a re-synchronization detecting window of a time interval that excludes a re-synchronization window mask from the re-synchronization window, detecting a synchronization signal from an input bit stream and detecting the synchronization signal in the re-synchronization detecting window. If the synchronization signal is detected in the re-synchronization detecting window without being detected in the synchronization detecting window a prescribed number of times in succession, the time interval of the re-synchronization window is updated. If the synchronization signal is detected in the re-synchronization window a prescribed number of times in succession, a re-synchronization counter outputs a re-synchronization establishment signal, the window generating circuit resets the position of the synchronization detecting window and generates the synchronization detecting window at a predetermined synchronization period, and the re-synchronization window generating circuit resets the re-synchronization window.
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