Search Results - "Forchhammer, S"

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    Forward error correction supported 150 Gbit/s error-free wavelength conversion based on cross phase modulation in silicon by Hu, H, Andersen, J Dahl, Rasmussen, A, Sørensen, B M, Dalgaard, K, Galili, M, Pu, M, Yvind, K, Larsen, K J, Forchhammer, S, Oxenløwe, L K

    Published in Optics express (11-02-2013)
    “…We build a forward error correction (FEC) module and implement it in an optical signal processing experiment. The experiment consists of two cascaded nonlinear…”
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    Journal Article
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    The emerging JBIG2 standard by Howard, P.G., Kossentini, F., Martins, B., Forchhammer, S., Rucklidge, W.J.

    “…The Joint Bi-Level Image Experts Group (JBIG), an international study group affiliated with ISO/IEC and ITU-T, is in the process of drafting a new standard for…”
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    Journal Article
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    Infiltration of the skull by dedifferentiated cutaneous leiomyosarcoma by Maier, J C, Kofler, K, Forchhammer, S, Skardelly, M, Mentzel, T, Häfner, H M, Kofler, L

    Published in Hautarzt (01-12-2021)
    “…We present a brief report of an 81-year-old man with a pretreated leiomyosarcoma of the skull. Histologically the diagnosis of a dedifferentiated cutaneous…”
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    Journal Article
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    Optimal context quantization in lossless compression of image data sequences by Forchhammer, S., Xiaolin Wu, Andersen, J.D.

    Published in IEEE transactions on image processing (01-04-2004)
    “…In image compression context-based entropy coding is commonly used. A critical issue to the performance of context-based image coding is how to resolve the…”
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    Journal Article
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    Tree coding of bilevel images by Martins, B., Forchhammer, S.

    Published in IEEE transactions on image processing (01-04-1998)
    “…Presently, sequential tree coders are the best general purpose bilevel image coders and the best coders of halftoned images. The current ISO standard, Joint…”
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    Journal Article
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    A unified approach to restoration, deinterlacing and resolution enhancement in decoding MPEG-2 video by Martins, B., Forchhammer, S.

    “…The quality and spatial resolution of video can be improved by combining multiple pictures to form a single superresolution picture. We address the special…”
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    Journal Article
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    Entropy bounds for constrained two-dimensional random fields by Forchhammer, S., Justesen, J.

    Published in IEEE transactions on information theory (01-01-1999)
    “…The maximum entropy and thereby the capacity of two-dimensional (2-D) fields given by certain constraints on configurations is considered. Upper and lower…”
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    Journal Article
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    Content layer progressive coding of digital maps by Forchhammer, S., Jensen, O.R.

    Published in IEEE transactions on image processing (01-12-2002)
    “…A new lossless context based method is presented for content progressive coding of limited bits/pixel images, such as maps, company logos, etc., common on the…”
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    Journal Article
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    Bounds on the capacity of constrained two-dimensional codes by Forchhammer, S., Justesen, J.

    Published in IEEE transactions on information theory (01-11-2000)
    “…Bounds on the capacity of constrained two-dimensional (2-D) codes are presented. The bounds of Calkin and Wilf (see SIAM J. Discr. Math., vol.11, no.1,…”
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    Journal Article
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    Lossless, near-lossless, and refinement coding of bilevel images by Martins, B., Forchhammer, S.

    “…We present general and unified algorithms for lossy/lossless coding of bilevel images. The compression is realized by applying arithmetic coding to conditional…”
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    Journal Article
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    Petabit-per-second data transmission using a chip-scale microcomb ring resonator source by Jørgensen, A. A., Kong, D., Henriksen, M. R., Klejs, F., Ye, Z., Helgason, Ò. B., Hansen, H. E., Hu, H., Yankov, M., Forchhammer, S., Andrekson, P., Larsson, A., Karlsson, M., Schröder, J., Sasaki, Y., Aikawa, K., Thomsen, J. W., Morioka, T., Galili, M., Torres-Company, V., Oxenløwe, L. K.

    Published in Nature photonics (01-11-2022)
    “…Optical fibre communication is the backbone of the internet. As essential core technologies are approaching their limits of size, speed and energy-efficiency,…”
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    Impact of Signal-Conjugate Wavelength Shift on Optical Phase Conjugation-based Transmission of QAM Signals by Ros, F. Da, Lillieholm, M., Yankov, M. P., Guan, P., Hu, H., Forchhammer, S., Galili, M., Oxenlowe, L. K.

    “…The impact of signal-conjugate wavelength shift on nonlinearity compensation through optical phase conjugation is investigated for 64- and 256-QAM…”
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    Conference Proceeding
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    Rate-distortion-complexity optimization of fast motion estimation in H.264/MPEG-4 AVC by Stottrup-Andersen, J., Forchhammer, S., Aghito, S.M.

    “…This paper presents an operational method for optimizing integer motion estimation in real-time H.264 encoding with respect to the trade-off between…”
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    Conference Proceeding
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    Partially hidden Markov models by Forchhammer, S., Rissanen, J.

    Published in IEEE transactions on information theory (01-07-1996)
    “…Partially hidden Markov models (PHMM) are introduced. They differ from the ordinary HMMs in that both the transition probabilities of the hidden states and the…”
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    Journal Article
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    Symmetry Enhancement Through Advanced Dispersion Mapping in OPC-Aided Transmission by Kaminski, P.M., Da Ros, F., Yankov, M.P., Clausen, A.T., Forchhammer, S., Oxenlowe, L.K., Galili, M.

    Published in Journal of lightwave technology (01-05-2021)
    “…In this work, we present a novel strategy to satisfy the nonlinearity compensation criteria by optical-phase-conjugation (OPC). Contrary to the most common…”
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    Journal Article
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    Adaptive partially hidden Markov models with application to bilevel image coding by Forchhammer, S., Rasmussen, T.S.

    “…Partially hidden Markov models (PHMMs) have previously been introduced. The transition and emission/output probabilities from hidden states, as known from the…”
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    Journal Article