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Proceedings Paper

Multilevel amplitude-modulation system for optical data storage
Author(s): Ting Robert Zhou; Christopher Tan; Chuck Leis; Ian Harvey; Greg Lewis; Terry Wong; Michael P. O'Neill
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Paper Abstract

MultiLevel encoding has been demonstrated to significantly increase the linear densities achieved with standard methods of binary encoding in optical data storage systems. An overview of the channel is provided from write encoder and pre-compensation, to readout with a matched adaptive equalizer and Viterbi decoder. Our multilevel channel has been implemented in silicon and designed to operate in parallel with the standard binary channel, thus maintaining full backward functionality of the underlying drive. We have developed an efficient research, development, prototyping, and integration process that allows us to accomplish final system implementation with minimal impact to the host system. We discuss our "helper" servo and firmware functions that ease integration of the multilevel LSI into existing circuit-board architecture, firmware, and software bases. The focus of this paper is on our fully-functional 2GB enhanced CD-R/RW external drive, but we also discuss briefly how multilevel technology has been shown to add to ROM, DVD, and advanced blue-laser, high-NA optic systems.

Paper Details

Date Published: 17 September 2002
PDF: 14 pages
Proc. SPIE 4930, Advanced Optical Storage Technology, (17 September 2002); doi: 10.1117/12.483340
Show Author Affiliations
Ting Robert Zhou, Calimetrics, Inc. (United States)
Christopher Tan, Calimetrics, Inc. (United States)
Chuck Leis, Calimetrics, Inc. (United States)
Ian Harvey, Calimetrics, Inc. (United States)
Greg Lewis, Calimetrics, Inc. (United States)
Terry Wong, Calimetrics, Inc. (United States)
Michael P. O'Neill, Calimetrics, Inc. (United States)

Published in SPIE Proceedings Vol. 4930:
Advanced Optical Storage Technology
Duanyi Xu; Seiya Ogawa, Editor(s)

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