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PRML |
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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.
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No references found | PRML technology in the Super-DLT tape format assists to increase LGMR technology''s performance & capacity and enables to produce tape drives that give high output with increased efficiency. For instance a PRML (Partial Response Maximum Likelihood) channel interprets the recorded transitions in a different way by partial amplitude sampling in order to increase the bit density using somewhat lower magnetic transition densities than in straight peak detect channels as illustrated. It says the new technology in SuperDLT, including laser guided magnetic recording, and advanced PRML partial response maximum likelihood technology, will give SuperDLT a full decades worth of increased performance and compatibility with no further substantial technical changes to come. |
PRML |
PRLR PRLS PRLWG PRLX PRM PRMA PRMA-HS PRMA/DA PRMB PRMBC PRMC PRMD PRMD PRMDP PRME PRMF PRMFL PRMG PRMH PRMHA PRMI PRMIA PRMIHP PRMIS PRMK PRML PRML techniquePRMM PRMMP PRMNY PRMO PRMP PRMPA PRMPC PRMR PRMRF PRMRP PRMS PRMS PRMSA PRMSE PRMSP PRMSS PRMT PRMU PRMV PRN PRN PRN PRN prn order PRNA PRNAM PRNAV | |||||||
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