Partial-response maximum-likelihood: Difference between revisions

Revision as of 09:25, 11 April 2021

Revision as of 14:54, 9 May 2021

Line 1:

{{Short description|Method for interpreting data in digital storage systems}}

In [[computer data storage]], '''partial-response maximum-likelihood''' ('''PRML''') is a method for recovering the [[Digital signal (electronics)|digital data]] from the weak analog read-back signal picked up by the [[Disk_read-and-write_head|head]] of a magnetic [[Hard disk drive|disk drive]] or [[tape drive]]. PRML was introduced to recover data more reliably or at a greater [[areal_density_(computer_storage)|areal-density]] than earlier simpler schemes such as peak-detection.<ref>G. Fisher, W. Abbott, J. Sonntag, R. Nesin, "[https://ieeexplore.ieee.org/document/542278 PRML detection boosts hard-disk drive capacity]", IEEE Spectrum, Vol. 33, No. 11, pp. 70-76, Nov. 1996</ref> These advances are important because most of the digital data in the world is stored using [[magnetic recording]] on Hard Disk Drives (HDD) or a digital tape recorders.