High density magnetic recording using digital block codes of low disparity
Martin Davidson, S. Haase, James L. Machamer, L. Wallman · IEEE Transactions on Magnetics · 1976
Low disparity block codes should find use in recording digital waveforms at high bit-packing densities approaching 33 000 b/in per track. Comparative tests indicate that some fairly-easy-to-implement block codes surpass the delay modulation code in bit error rate performance.