frequency modulation recording; FM recording
Technical term in computing and data storage; refers to a method of encoding data onto magnetic media using frequency modulation.
この磁気テープは周波数変調記録方式を採用している。
This magnetic tape uses a frequency modulation recording method.
周波数変調 is frequency modulation itself, while 周波数変調記録 is the recording technique that uses it.
modified frequency modulation recording; MFM recording
Compound of 周波数 (frequency), 変調 (modulation), and 記録 (recording), directly describing the technique.