Martin Hassner

Martin Hassner
hgst · yes

Ph.D

About

24
Publications
2,032
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
778
Citations

Publications

Publications (24)
Conference Paper
Full-text available
We present-a low-complexity soft detection and soft decoding magnetic disk drive read channel with a modified soft-output signal space detector (S<sup>3</sup>D) which uses 3D-110 equalization and an error/erasure decoding Reed Solomon (RS) code. The detector determines max-log reliability information for intersymbol interference (ISI) channels with...
Article
Signal equalization using a Hilbert filter for perpendicular double-layer media in association with a geometric mean radius reader is described. A theoretical approach is presented based on reciprocity, which reveals that the equalization is equivalent to the longitudinal transformation of a magnetization vector. Thus, a readback step-like response...
Article
old, Deterministic and nonambiguous rational !-languages, in Automata on innite words (Le Mont-Dore, 1984), pp. 18-27, Springer, Berlin, 1985. [10] A. Arnold, A syntactic congruence for rational !-languages, Theoret. Comput. Sci. 39,2-3 (1985), 333-335. [11] R. Barua, The Hausdor-Kuratowski hierarchy of !-regular languages and a hierarchy of Muller...
Article
We introduce a coding method which creates a nested sequence of codes whose distances can be adjusted to fit the error statistics of a specified digital communication or storage channel. This construction permits the use of redundancy in a nonuniform manner as required by the actual digital error occurrences in the codewords. In storage application...
Article
Full-text available
Devices for convenient information exchange over the wireless infrared channel are commonly found in many of today's mobile platforms for computing, communicating, and imaging. Most devices comply with the international standards promoted by the Infrared Data Association for data rates of up to 4 Mb/s. With the approval of a 16 Mb/s data rate optio...
Article
Full-text available
An appropriate adaption of the decision boundaries of the well-known signal space detector (SSD) yields a detector that whitens the input noise in the detector forward path. This new detector, called a whitening signal space detector (WSSD), offers higher reliability without increasing the dimensionality of the signal space. A WSSD can be designed...
Article
A sequential key equation solver algorithm for Reed-Solomon codes is presented. This work is motivated by the need for Error Correction Coding (ECC) On-the-Fly (OTF) in high data rate storage devices. In these applications the ECC encoder/decoder circuitry is integrated into the device controller and the actual correction is performed in the sector...
Article
The authors apply the analytic method of exponential series expansion to empirical frequency distributions obtained from measurements of track misregistration (TMR) phenomena in magnetic storage head-disk-assembly (HDA) devices. Analytical expressions that represent the deviation of the empirical TMR frequency distributions from the Gaussian distri...
Conference Paper
Full-text available
The authors consider bandlimited linear channels with finite memory formally described by a polynomial g ( z ) with integer coefficients in the variable z that represents the unit delay operator. A signal processing method that operates on blocks of finite precision samples of the channel output is presented. This signal processing method is a soft...
Conference Paper
Full-text available
In most applications of a Reed-Solomon codec (coder/decoder) data are either being transmitted or being received where either the encoder or the decoder is active, while the other is idle. The idea presented is to show how the encoder can be transformed such that its implementation can make use of existing decoder circuitry, requiring only little a...
Article
The authors present a coding architecture suitable for magnetic storage systems. In data storage devices, several types of errors may occur. This includes random errors as well as burst errors of different lengths. A class of error control codes is presented, based on a multilevel coding architecture, that can correct several types of errors. The p...
Article
A (1,6) runlength limited (RLL) code is described in which the encoder converts unconstrained data strings into (1,6) RLL constrained strings, where the rate is 2/3. The decoder, having limited error propagation recovers the original data strings. One error in the encoded string can result in no more than eleven errors in the decoded data.
Article
Full-text available
Ideas which have origins in C. E. Shannon's work in information theory have arisen independently in a mathematical discipline called symbolic dynamics. These ideas have been refined and developed in recent years to a point where they yield general algorithms for constructing practical coding schemes with engineering applications. In this work we pr...
Article
An engineering interpretation is given for an isomorphism theorem proved in the context of symbolic dynaics. The latter may be viewed as the nonprobabilistic analog of ergodic theory. Contrary to Ornstein's isomorphism theorem this isomorphism results in engineering applications. Sliding block code algorithms are presented for both noiseless source...
Article
We propose Markov Random Fields (MRFs) as probabilistic models of digital image texture where a textured region is viewed as a finite sample of a two-dimensional random process describable by its statistical parameters. MRFs are multidimensional generalizations of Markov chains defined in terms of conditional probabilities associated with spatial n...

Network

Cited By