The Experts below are selected from a list of 297 Experts worldwide ranked by ideXlab platform

Gunnar Karlsson - One of the best experts on this subject based on the ideXlab platform.

  • Asynchronous Transfer of video
    IEEE Communications Magazine, 1996
    Co-Authors: Gunnar Karlsson
    Abstract:

    Video Transfers across IP and ATM networks have received much research attention during the last ten years. Various video services are expected in the future, enabled by the rapid development in video coding and broadband network technology. This article gives an introduction to the issues involved in Asynchronous video Transfers. Brief overviews of video coding, rate control, and multiplexing, as well as delay, error, and loss control are also given.

J Ramasastry - One of the best experts on this subject based on the ideXlab platform.

  • variable bit rate video transmission in the broadband isdn environment
    Proceedings of the IEEE, 1991
    Co-Authors: Y Q Zhang, K S Kim, R L Pickholtz, J Ramasastry
    Abstract:

    Many compensative measures have been proposed recently the make the cell loss in ATM (Asynchronous Transfer mode) networks subjectively imperceptible. These schemes include the simple automatic repeat quest (ARQ) scheme, error concealment by command refreshment, appropriate queueing disciple and priority switching design and layered source coding schemes. The authors summarize these efforts and, in particular, elaborate on different layered source coding schemes. Four types of signal priority classification schemes are identified: bit-plane separation (FDS) combined with bit-plane-frequency separation (CBFS), and feature plane separation (FPS). Different layered coding techniques are discussed and compared. Some open questions and recommendations are also presented for further research and study. >

A Odinmaokafor - One of the best experts on this subject based on the ideXlab platform.

  • characterization of video codecs as autoregressive moving average processes and related queueing system performance
    IEEE Journal on Selected Areas in Communications, 1991
    Co-Authors: R Grunenfelder, John Cosmas, S Manthorpe, A Odinmaokafor
    Abstract:

    A method of characterizing video codec sources in Asynchronous Transfer mode (ATM) networks as an autoregressive moving average (ARMA) process is described. Measurements of long-term mean and the autocorrelation function of cell interarrival times allow the parameter estimation of the ARMA model. The video source is then described by ARMA model. Furthermore, it is shown that the multiplexed stream of video cells is also an ARMA process. Such a cell stream is then applied to a model of a queuing system to obtain performance measures of the system. Perturbation analysis is then performed on the functional behavior of the queuing system by appropriate perturbation of the model parameters to determine cell waiting time sensitivity due to slight variations of the input process. >

Y Q Zhang - One of the best experts on this subject based on the ideXlab platform.

  • variable bit rate video transmission in the broadband isdn environment
    Proceedings of the IEEE, 1991
    Co-Authors: Y Q Zhang, K S Kim, R L Pickholtz, J Ramasastry
    Abstract:

    Many compensative measures have been proposed recently the make the cell loss in ATM (Asynchronous Transfer mode) networks subjectively imperceptible. These schemes include the simple automatic repeat quest (ARQ) scheme, error concealment by command refreshment, appropriate queueing disciple and priority switching design and layered source coding schemes. The authors summarize these efforts and, in particular, elaborate on different layered source coding schemes. Four types of signal priority classification schemes are identified: bit-plane separation (FDS) combined with bit-plane-frequency separation (CBFS), and feature plane separation (FPS). Different layered coding techniques are discussed and compared. Some open questions and recommendations are also presented for further research and study. >

Jaudelice Cavalcante De Oliveira - One of the best experts on this subject based on the ideXlab platform.

  • Dimensionamento de enlaces em redes de telecomunicações ATM
    [s.n.], 2018
    Co-Authors: Jaudelice Cavalcante De Oliveira
    Abstract:

    Orientador: Ivanil S. BonattiDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de ComputaçãoResumo: Neste trabalho uma abordagem abrangente para a determinação da capacidade de enlaces ATM (Asynchronous Transfer Mode) é proposta, considerando o grau de serviço das chamadas e os parâmetros de qualidade de serviço das conexões. A partir dos parâmetros descritores de tráfego e de qualidade de serviço propostos pelos organismos de recomendação, ITU-T (International Telecommunication Union - Telecommunication Standardization Sector) e ATM Forum, uma banda efetiva é obtida para cada classe de serviço, utilizando modelos probabilísticos para a perda e modelos de pior caso para o atraso de células das conexões. Para serviço comutado, a probabilidade de aceitação de uma nova chamada no enlace é obtida através da banda efetiva e através de modelos para a demanda e tempo de retenção da conexão. ...Observação: O resumo, na íntegra, poderá ser visualizado no texto completo da tese digitalAbstract: In this work a broad approach regarding the determination of the ATM (Asynchronous Transfer Mode) link capacity is proposed, taking into account the grade of service of calls and connection quality of service parameters. An effective bandwidth is obtained for each of the class of services defined through the traffic descriptors and QoS parameters proposed by ITU-T (International Telecommunication Union - Telecommunication Standardization Sector) and ATM Forum. Such procedure uses probabilistic models for connection cell loss and worst-case models for connection cell delay. The call blocking probability for switched services in a link is obtained through the effective bandwidth and through models for the demand and holding time in the connection. ...Note: The complete abstract is available with the full electronic digital thesis or dissertationsMestradoMestre em Engenharia Elétric

  • Dimensionamento de enlaces em redes de telecomunicações ATM
    2017
    Co-Authors: Jaudelice Cavalcante De Oliveira
    Abstract:

    Resumo: Neste trabalho uma abordagem abrangente para a determinação da capacidade de enlaces ATM (Asynchronous Transfer Mode) é proposta, considerando o grau de serviço das chamadas e os parâmetros de qualidade de serviço das conexões. A partir dos parâmetros descritores de tráfego e de qualidade de serviço propostos pelos organismos de recomendação, ITU-T (International Telecommunication Union - Telecommunication Standardization Sector) e ATM Forum, uma banda efetiva é obtida para cada classe de serviço, utilizando modelos probabilísticos para a perda e modelos de pior caso para o atraso de células das conexões. Para serviço comutado, a probabilidade de aceitação de uma nova chamada no enlace é obtida através da banda efetiva e através de modelos para a demanda e tempo de retenção da conexãoAbstract: In this work a broad approach regarding the determination of the ATM (Asynchronous Transfer Mode) link capacity is proposed, taking into account the grade of service of calls and connection quality of service parameters. An effective bandwidth is obtained for each of the class of services defined through the traffic descriptors and QoS parameters proposed by ITU-T (International Telecommunication Union - Telecommunication Standardization Sector) and ATM Forum. Such procedure uses probabilistic models for connection cell loss and worst-case models for connection cell delay. The call blocking probability for switched services in a link is obtained through the effective bandwidth and through models for the demand and holding time in the connectio