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What is EFM

Q: -Whats is EFM?

A: -EFM (Eight to Fourteen Modulation) is a method of encoding source data for CD formats into a form that is easy to master, replicate and playback reliably. EFM modulation gives the bit stream specific patterns of 1s and 0s, thus defining the lengths of pits and lands. EFM permits a high number of channel bit transitions for arbitrary pit and land lengths. The merging bits ensure that pit & land lengths are not less than 3 and no more than 11 channel bits. This reduces the effect of jitter, distortions on the error rate, increases data density and helps facilitate control of the spindle motor speed