Asymmetric run length constraints for increased resolution and power margin in mammos read-out

摘要

In the present invention asymmetric run length constraints with different minimum run lengths for first and second patterns representing binary data are introduced, like dm=0 for the first pattenr, i.e. shortest sequence of first patterns is equal to the bit period, and ds0 for the second pattern, i.e. shortest sequence of second patterns is equal to d+1 bit periods. Thereby, the small “cost” of a reduced code rate will be more than compensated by a large increase in power margin.