Patent ID: 6377308
Filing Date: 2002-04-23
Classification: H04N

Abstract:
A method of decoding data broadcast within a vertical blanking interval (VBI), comprising:determining a set of operational parameters for each scan line within the VBI based on unique signal characteristics of said each scan line, the unique signal characteristics being associated with content, source and transmission of said each scan line; storing the set of operational parameters in a storage medium using a scan line number associated with said each scan line; receiving a scan line of a subsequent VBI from a capture driver, said scan line having associated with it a scan line number; retrieving a set of operational parameters from said storage medium, said set of operational parameters corresponding to said scan line number; decoding said scan line using said set of operational parameters to create a decoded scan line; adjusting said set of operational parameters based upon the results of the decoding of said scan line; and replacing said set of operational parameters associated with said scan line number in said storage medium with said adjusted set of operational parameters.