Tiled embedded data blocks

摘要

Described herein is a process for facilitating the recovery of data from an embedded data pattern (53) on a recording medium (22) through the use of an appropriately sized capture window (56) that is randomly positioned within the data pattern (53). The embedded data pattern (53) is composed of a plurality of identical, one dimensionally or two dimensionally regularly tiled embedded data blocks (51) which contain sufficient spatial addressing information to permit the logical reconstruction of a complete data block (51) from any set of fragments that collectively provide a full cover for the surface area of any one tile. The data pattern (53) is formed by repeating the data blocks (51) along tiling vectors (Tx, Ty). To this end, the capture window (56) is sized to include a shape which is completely registered with the data pattern (53) and which is capable of tiling the recording medium (22) in accordance with the tiling vectors (Tx, Ty). <IMAGE>