(2)
PRML is a signal processing technology that improves reproduction performance by allowing inter-symbol interference.
As a result of the administration order with respect to
PRML, the USD1.6bn aggregate principal amount of outstanding senior notes of Petroplus Finance Ltd have accelerated, the company said.
However, the company revealed that its demonstration involved an advanced version of its giant magneto-resistive read head, a narrow-track thin-film inductive write head, ultra-low noise cobalt-alloy magnetic media and advanced partial-response, maximum likelihood (
PRML) channel electronics.
PRML: Higher Efficiency Data Coding The extremely high-bit densities of second-generation super drives (a linear density of 193,000 bpi in the case of SDLT 320 and 7.32Kbs per millimeter bpi for LTO Ultrium 2) required capabilities beyond the conventional Run Length Limited 1,7 read channel technology with peak detection common to many tape drive formats.
DDS-3 also benefited from a significant non-media technology enhancement: the DDS debut of highly efficient Partial Response Maximum Likelihood (
PRML) read channel technology, contributing further to increased capacity.
VR2 is the first successful implementation of Partial Response Maximum Likelihood (
PRML) channel encoding technology on linear tape drive platforms, and improves code rate efficiency of linear tape drives to more than 99%.