INFORMATION READING METHOD AND DEVICE, SIGNAL CAPTURING METHOD FOR INFORMATION READING DEVICE, BAND LIMITING METHOD THEREFOR, TIMING POINT AMPLITUDE EXTRACTING METHOD THEREFOR, AND SIGNAL PROCESSING METHOD THEREFOR, READ SIGNAL PROCESSING UNIT, AND READ SIGNAL PROCESSING METHOD AND DEVICE

摘要

There is provided a method of reading information which makes it possible to suppress the size of hardware and a price thereof and to improve an S/N ratio of a reading signal and reading resolution, wherein even if depth of field for reading is enlarged or a concave/convex portion or a blurred portion is left on the reading face, reading precision can be improved. The method includes steps of acquiring from a medium 1, a signal containing binary digit information having a predetermined information length and a one-dimensional arrangement, extracting information concerning an elemental unit length of the information length of the binary digit information from the acquired signal, and reading a ratio of the binary digit information to the information length based on the extracted elemental unit length information.