| 摘要 |
A system for decoding data encoded on a surface is provided. The coded data has at least two clock tracks indicative of a position of the coded data in the direction perpendicular to an alignment direction and two alignment lines for each clock track. The two alignment lines are indicative of the position of the respective clock track. The system has a decoder for determining, using an alignment phase-locked loop (PLL), a position of the alignment lines for a respective clock track, determining, using the position of the alignment lines, the position of each respective track, and updating the alignment PLL. |
