Advanced signal processing for the Blu-ray Disc system

Stek, B.; Otte, R.; Jansen, T.P.H.G.; Modrie, David

doi:10.1109/omods.2002.1028635

Cited by 7 publications

(2 citation statements)

References 5 publications

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“…2 shows a reasonable approximation of the channel by a 2-D impulse response with a central tap , and with six nearest-neighbor taps (we will refer further to these six nearest-neighbors as the first shell of neighboring bits). This situation applies for a disc capacity of two times that of Blu-ray Disc (BD), the third generation of optical storage (see, e.g., [7], [8]). BD has a capacity of 25 GB and is based on the conventional 1-D format with a spiral consisting of a single bit-row.…”

Section: A Joint 2-d Bit-detectionmentioning

confidence: 99%

Refinements of Multi-Track Viterbi Bit-Detection

2007

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In optical storage, data can be arranged on the disc in a meta-spiral consisting of a large number of bit-rows with a small track-pitch. Successive revolutions of the meta-spiral are separated by a narrow guard band. For high storage densities, such a system results in severe 2-D inter-symbol interference. In the multi-track Viterbi algorithm (MVA) of Krishnamoorthi and Weeks, the complex problem of 2-D bit-detection is broken down into a number of smaller bit-detection problems on sets of adjacent bit-rows called stripes. We improve the bit error rate (bER) performance of such a 2-D bit-detector via a number of measures such as: 1) weighing of the separate contributions to the branch metrics from each bit-row in a stripe and 2) inclusion of an additional contribution to the branch metrics from a bit-row adjacent to a stripe. In addition, we reduce the computational complexity by varying the number of bit-rows per stripe during successive iterations of the MVA, and through the use of local sequence feedback.Index Terms-Optical recording, 2-D inter-symbol interference, 2-D Viterbi detection.

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Section: A Joint 2-d Bit-detectionmentioning

confidence: 99%

Refinements of Multi-Track Viterbi Bit-Detection

2007

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“…A binary 2-D optical storage 1 ͑TwoDOS͒ disk has been developed to increase capacity and data rate with factors of up to 2 and 10, respectively, over "blu-ray disk" ͑BD, formerly known as DVR͒ technology 2 by developing a new technique of storing data in a 2-D format. Using multilevel techniques over binary TwoDOS, an even higher increase in capacity and data rate can be realized.…”

Section: Introductionmentioning

confidence: 99%

Low complexity symbol detection method for multilevel 2-D optical storage based on a linear channel model

Moinian¹,

Fagoonee²,

Honary³

2005

Opt. Eng.

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This version is available at https://strathprints.strath.ac.uk/37083/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Abstract. A symbol detection scheme based on the Viterbi algorithm that simultaneously processes subsets of 2-D data in the presence of Gaussian noise was recently proposed for binary 2-D optical storage ͑TwoDOS͒. In the case of multilevel TwoDOS, a straightforward fullfledged maximum likelihood symbol detector, or even the previous Viterbi-based algorithm, is not an ideal solution due to complexity restrictions. We propose a suboptimum low complexity symbol detector, which still performs within the accepted performance bound for optical storage. We describe the procedures involved in designing and developing a practical symbol detection scheme for multilevel TwoDOS by analyzing the signal values generated by a linear channel model in the presence of Gaussian noise. Our proposed detection scheme exploits the properties of the 2-D data format on the disk, and is flexible enough to accommodate performance and complexity restrictions for optical storage applications.

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Signal processing and coding for two-dimensional optical storage

Immink

Coene

Lee

et al.

GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489)

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This paper introduces the concept of TwoDimensional Optical Storage (TwoDOS). In this concept, bits are written in a broad spiral consisting of a number of bitrows stacked together in a hexagonal packing. Bits with a value '1' are represented physically as circular pit-holes on the disc, while bits with a value '0' are characterized by the absence of such a pit-hole. A scalar diffraction model is used to calculate the signal levels for various diameters of the pits. A stripe-wise Viterbi detector is proposed to perform 2D bit-detection with a limited state complexity of the trellis. Simulation results are shown for various diameters of the pits. A 2D modulation code is applied to eliminate patterns that yield a high probability of erroneous detection.

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Advanced signal processing for the Blu-ray Disc system

Cited by 7 publications

References 5 publications

Refinements of Multi-Track Viterbi Bit-Detection

Refinements of Multi-Track Viterbi Bit-Detection

Low complexity symbol detection method for multilevel 2-D optical storage based on a linear channel model

Signal processing and coding for two-dimensional optical storage

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