A New Method of Evaluating Signal Quality for Systems to which Partial Response and Maximum Likelihood Is Applied

Nagai, Yoshinori; Ogawa, Akihito; Kashihara, Yutaka

doi:10.1143/jjap.42.971

Cited by 14 publications

(6 citation statements)

References 2 publications

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“…The carrier-to-noise ratio (CNR), erase ratio (ER), simulated bit error rate (SbER), partial-response signal-to-noise ratio (PRSNR) and narrow-band signal-to-noise ratio (NBSNR) 1,11) were evaluated. SbER, PRSNR and NBSNR were newly introduced to evaluate the signal quality of the HD DVD system.…”

Section: Methodsmentioning

confidence: 99%

“…The capacities of 20 GB for a single-layer and more than 30 GB for a dual-layer rewritable medium have been demonstrated previously. [1][2][3] Recently, the feasibility of a high data transfer rate of 2Â or more has been successfully demonstrated for both singlelayer and dual-layer rewritable HD DVD media. 4,5) One of the features that enables the large capacity of the 20 GB single-layer medium is the ''low-to-high'' signal polarity (i.e., the reflectivity of the crystal part is lower than that of the amorphous part).…”

Section: Introductionmentioning

confidence: 99%

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High-Speed Deposition of New Low-Refractive-Index Dielectric Film “SiOC” for Rewritable HD DVD Media

Nakai

Yusu

Satoh

et al. 2006

jjap

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A low-refractive-index film plays an important role in attaining a high density of rewritable HD DVD optical recording media, for which the blue-violet laser of 405 nm wavelength incident on a 0.6-mm-thick substrate is used. We have developed a new low-refractive-index material, SiOC, for the medium, which can be sputter-deposited at much higher rates than the conventional SiO2 film. The SiOC film is formed using a SiC target with an Ar and O2 gas mixture using either a RF or DC power supply. The film exhibited similar optical constants as SiO2, and DC sputtering in particular showed very low substrate temperature rise. The resultant deposition rate per sputter power is about three times higher than the rate of deposition using a SiO2 target. The obtained thin film consists of Si, O, and C. Although the film includes a substantial amount of carbon, it showed almost the same optical characteristics as SiO2. We demonstrated that the single-layer HD DVD rewritable medium with 20 GB capacity using SiOC film had satisfactory recording characteristics. We believe that this media can be manufactured at a cost similar to that of conventional rewritable DVDs in mass production.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High-Speed Deposition of New Low-Refractive-Index Dielectric Film “SiOC” for Rewritable HD DVD Media

Nakai

Yusu

Satoh

et al. 2006

jjap

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“…1(a). Simulated bit error rate (SbER) 5) curves relative to the pulse duty were obtained for various input bandwidths. The pulse duty was varied from 1/8 to 1/2.…”

Section: Comparison With Experimentsmentioning

confidence: 99%

Analysis of Signal-to-Noise Ratio Improvement by Multi-tone Demodulation

Kikukawa¹,

Minemura²

2009

jjap

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We study the critical properties of the weakly disordered p-component ferromagnet in term of the renormalization group (RG) theory generalized to take into account the replica symmetry breaking (WB) effects coming from the multiple local minima solutions of the meanfield equations. Recently it has been shown that for p c 4 the traditional RC flows at dimensions D = 4f, which are usually considered as describing the disorder-induced universal critical behaviour, are unstable with respect to the W E potentials as found in spin glasses, and a new type of stable one-step RSB fixed point has been discovered 111. Here it is demonsuated that for a general type of the Parisi RSB.S~JUC~UES there exist no stable fixed points, and the RG flows lead to the strong-coupling regime at the finite scale R, -. exp(l/u), where U is the small parameter describing the disorder. The physical consequences of the obtained RG solutions are discussed. In particular. we argue that discovered RSB shong-coupling phenomena indicate the onset of a new spin-glass-type critical behaviour in the temperature interval T < r.exp(-l/u) near Tr.The possible relevance of the considered RSB effects for the Griffith phase is also discussed.

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“…in ascending order. 3) On the other hand, the histogram of SAM values measured from actual reproduced signals is shown in Fig. 3.…”

Section: Sam Histogram Of a Random Patternmentioning

confidence: 99%

New Equalizer Optimization Method for Partial Response Maximum Likelihood Systems Using Normal Equation with Sequenced Amplitude Margin

Hayashi¹,

Okumura²,

Akiyama³

et al. 2005

Jpn. J. Appl. Phys.

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A New Method of Evaluating Signal Quality for Systems to which Partial Response and Maximum Likelihood Is Applied

Cited by 14 publications

References 2 publications

High-Speed Deposition of New Low-Refractive-Index Dielectric Film “SiOC” for Rewritable HD DVD Media

High-Speed Deposition of New Low-Refractive-Index Dielectric Film “SiOC” for Rewritable HD DVD Media

Analysis of Signal-to-Noise Ratio Improvement by Multi-tone Demodulation

New Equalizer Optimization Method for Partial Response Maximum Likelihood Systems Using Normal Equation with Sequenced Amplitude Margin

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