G - Physics – 11 – B
Patent
G - Physics
11
B
352/32.1
G11B 7/007 (2006.01) G06K 19/06 (2006.01) G11B 7/0033 (2006.01) G11B 7/013 (2006.01) G11B 20/12 (2006.01) G11B 27/30 (2006.01)
Patent
CA 1204211
ABSTRACT The method for formatting optically encoded digital data on a substrate (11) to form a data record carrier (10) includes the steps of: selecting a track path on the sub- strate (11) for each one of a plurality of tracks (14, 14a, 14b) of data (12); selecting a data cell length (15) in the direction of each track (14) for each bit of data to be stored in each cell (15) on each track (14); selecting a cell width dimension transverse to the direction of the track (14); selecting a non-trasition cell (A, C) for one form of logic (0 or 1) to be stored in each such cell (15); selecting a transition cell (B) for the other form of logic (1 or 0) to be stored in each such other cell (15); estab- lishing a leader section (22) for each track (14); establish- ing a tailer section (24) for each track (14); establishing a front track address section (32) for each track; estab- lishing a back track address section (44) for each track (14) and creating the tracks (14a and 14b) with the above parameters on a substrate (11) to form the data record car- rier (10). Preferably, the tail end of each track (14) is a mirror image of the leading end of the track (14) to facil- itate locating and identifying each track reading forward or backward. Also, coded groups (34, 42 or 50, 52) are formed on each track between the ends thereof with the cod- ing thereof facilitating error detection and error correc- tion.
433494
Borden Ladner Gervais Llp
News Log International Inc.
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