Patent ID: 8692938

Claim:
A video processing device comprising: a video inputting unit that receives video data and an input-side vertical synchronization signal used for displaying the video data as inputs; a synchronization signal detecting unit that detects an input of the input-side vertical synchronization signal to the video inputting unit; and a synchronization signal control unit that outputs an output-side vertical synchronization signal based on a detection result acquired by the synchronization signal detecting unit, wherein the synchronization signal control unit outputs the input-side vertical synchronization signal, which has been input, as the output-side vertical synchronization signal when the synchronization signal detecting unit detects an input of the input-side vertical synchronization signal at a predetermined cycle, and when the synchronization signal detecting unit detects an input of the next input-side vertical synchronization signal before the predetermined cycle elapses after the output of the output-side vertical synchronization signal, the synchronization signal control unit does not output a next input-side vertical synchronization signal input before an elapse of the predetermined cycle as a next output-side vertical synchronization signal but outputs an input-side vertical synchronization signal that is input further next as the next output-side vertical synchronization signal.