Machine readable code track

摘要: Encoded information is contained in a circular track having sector patterns formed by abutting segments. The segments are all of equal angular extent and extend around the with each containing same number Each segment has binary value sequence represents encoded information. different can, for example, represent decimal numeral. An ''''start'''' employed that not duplicated any can occur from assembling coded sectors order whatsoever. thereby assured within it only one pattern regardless other track. codes chosen so when assembled relation, no more than two like valued succession transitions between differently provide timing decoding markings.