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PRML

   Also found in: Acronyms, Wikipedia 0.03 sec.

PRML

(Partial Response Maximum Likelihood) A technique used to differentiate a valid signal from noise by measuring the rate of change at various intervals of the rising waveform. Bits generated by a modem or by reading a hard disk have uniform characteristics, whereas random noise does not. PRML uses digital signal processing (DSP) to reconstruct the data.

On magnetic disks, PRML increases the number of bits that can be recorded over earlier methods. It uses an RLL encoding sequence of 0,4,4 and provides an 8:9 ratio of user data to recorded data. See RLL.

PRML - Partial Response Maximum Likelihood


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PRML technology solves this problem by first converting the analog read signal to a digital signal, then using the digital signal as the basis to recognize data bits.
LTO & SDLT: built SAN tough by Brinkman, Peter N. / Computer Technology Review
The joint work of both parties on PRML led to the creation of the Enterprise Privacy Markup Language 1.
Zero-Knowledge Systems Inc., on Behalf of Synomos Inc., Files Motion ... by Business Wire
Several new technologies, including a pivotal optical servo, PRML read channel changes and others required longer lead times to qualify and perfect before shipping into general availability.
Automated Tape Libraries Are New SDLT Groupies! by Ferelli, Mark / Computer Technology Review
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