US Patent 7321321 Decoding of a restricted m-of-n code

A method for communication between a sender and a receiver, including receiving data in the form of an M-of-N code, where the M-of-N code includes a first component of length n1 and a second component of length n2; decoding data in which the first component is an m1-of-n1 code and the second component is an m2-of-n2 code; and decoding data in which the first component is an m3-of-n1 code where m1≠m3 and the second component is an m4-of-n2 code where m2≠m4.