Patent ID: 6215526
Filing Date: 2001-04-10
Classification: H04N

Abstract:
A process for decoding in-band tag field data from a video stream, comprising the steps of:parsing a tag field or frame from said video stream;decoding the data in said tag field;assembling said decoded data into data objects;applying a regular pattern of maximally colored blocks horizontally outside the data window, forming an array of stripes;examining the DC component of the first macroblock in each slice;horizontally registering each tag data slice;wherein each stripe is two macroblocks high, and extends into said window by at least one macroblock;wherein between each maximally colored stripe is a stripe of minimally colored macroblocks of the same size; andwherein each slice is examined in turn until a maximum DC component value is detected, indicating that the slice begins a tag data slice and every other slice is a tag data slice.