A Coding Method in agnetic ecording
Takashi Tamura, Masayoshi Tsutsumi, Hajime Aoi, Hiromi Matsuishi, Kazuo Nakagoshi, Sadao Kawano, Mutsuo Makita · 1972
An experimental comparison of the recording density limits of three coding methods was performed to find the coding method most suitable for high density recording. We examined FM, MFM, and one of the so-called run-length- limited codes to which self-clocking and peak detection are applicable. In this paper, we call the last coding method mod- ified nonreturn to zero inverted (MNRZI). The recording density limit was obtained for each method from measure- ment of the peak shift and signal to noise ratio for a given recording channel.