1. A method for determining a running disparity at a current vector boundary for balanced binary codes that have a running disparity of plus or minus one at any vector boundary, comprising: setting the ruing disparity to a complementary disparity of a disparity at a preceding reference point when there is an odd number of unbalanced vectors between the preceding reference point and the current vector boundary; and setting the running disparity to the disparity at the preceding reference point when there is an even number of unbalanced vectors between the preceding reference point and the current vector boundary.