Method and device for correcting errors in the opening of time w

Television – Nonpictorial data packet in television format – Data separation or detection

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348468, 348546, H04N 708

Patent

active

061307181

ABSTRACT:
Method and device for correcting errors in synchronization of operations of recovering sequences of ancillary data transmitted over the invisible lines of the VBI of a video signal including a vertical synchronization signal Vsync and a horizontal synchronization signal Hsync used to synchronize the opening of time windows for recovery of the data. In the event of the absence of a horizontal synchronization pulse at the end of a period equal to H+.DELTA.H, where H is the period of the signal Hsync and .DELTA.H is a first predetermined lapse of time, an artificial synchronization pulse is generated, and the moment of opening of the window for recovering ancillary data to the moment of generation of the artificial synchronization pulses so as to cause the moment to coincide with the start of the sequence of ancillary data to be recovered.

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French Search Report Citing the above-listed references: AA, AM, AN, AO, AP and AQ.

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