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Partial-response maximum-likelihood

In computer data storage, partial-response maximum-likelihood (PRML) is a method for reading the digital data from the weak analog read-back signal picked up by the head of a magnetic disk drive or tape drive. PRML was introduced to read data more reliably or at a greater areal-density than earlier simpler schemes such as peak-detection. These advances…

Art, Implementation in products & Theoretical development

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Implementation in products

AmpexRLLCharles ColemanVideo tape recorderPlessey
15 related topics

Theoretical development

Magnetic recordingMaximum-likelihoodViterbi algorithmAndrew ViterbiConvolutional codes
9 related topics

Modern electronics

AGCLow-pass filterFIR filterTDMRBCJR algorithm
8 related topics

Further developments

IntegerEye-patternIntersymbol interference
3 related topics

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Theoretical development

Implementation in products

Further developments

Modern electronics

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Partial-response maximum-likelihood

Nodes50
Edges49
Triples1
Avg. degree1.96
Density0.04
Components1

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Important terminology

prml digital ibm tape ampex channel disk viterbi magnetic maximum-likelihood data recording write pr4 algorithm read first analog response detector

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SubjectPredicateObjectConfidenceSrc
peak-detectioninstance ofPRML was introduced to read data more reliably or at a greater areal-density than earlier simpler schemes0.80text

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