Performance Study of Large-Scale Video Streaming Services in Highly Heterogeneous Environment

Ho, K.M.; Poon, Wing-Fai; Lo, Kwok-Tung

doi:10.1109/tbc.2007.908326

Cited by 18 publications

(18 citation statements)

References 23 publications

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“…O projeto deste armazenamento foi estudado para as redes de televisão por cabo (Wauters et al, 2007), para os serviços baseados na Internet (Ho, Poon, & Lo, 2007) e para os serviços de IPTV (D. De Vleeschauwer & Laevens, 2009;Krogfoss, Sofman, & Agrawal, 2008;Verhoeyen, De Vleeschauwer, & Robinson, 2008). Outras investigações também desenvolveram algoritmos para prever qual o conteúdo mais procurado e definir onde cada tipo de programa deve ser gravado (Danny De Vleeschauwer et al, 2009 (Bury & Li, 2015).…”

Section: Revisão Aprofundada Da Literaturaunclassified

O desenvolvimento da TV não linear e a desprogramação da grelha

Becker

Abreu

Nogueira

et al. 2018

(OBS*)

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Este artigo discute as mudanças em curso na televisão, acentuadas pelo aumento da oferta de conteúdos fornecidos on-demand. Tais conteúdos são disponibilizados, principalmente, por operadores de TV por assinatura, possibilitando uma experiência de TV não linear. Para caracterizar o cenário internacional da oferta de conteúdos de TV não linear, realizou-se uma pesquisa em 62 países que permitiu catalogar as diversas tipologias de serviços oferecidos. Complementarmente, foi feita uma revisão detalhada da literatura referente ao tema que evidenciou a inexistência de levantamentos similares. Desta forma, podese constatar a crescente oferta de serviços de TV não linear, comportando dois efeitos: 1. uma migração da audiência televisiva para estes serviços, com mudanças estruturais, ainda que incipientes, na organização dos programas e das narrativas; 2. um fortalecimento da televisão em direto (ao vivo) na TV tradicional, linear. Neste enquadramento, o presente artigo fornece bases empíricas para análises teóricas aprofundadas, discutindo um tema ainda incipiente nas ciências da comunicação e áreas correlacionadas.Palavras chave: Catch-up TV, grelha de programação, vídeo on-demand, TV em direto. AbstractThis article discusses the changes taking place on television, accentuated by the increased supply of ondemand content. Such content is made available primarily by pay-TV providers, allowing a non-linear TV experience. To frame the international scene offering non-linear TV content, a survey was conducted in 62 countries, where the offered services were catalogued. In addition, a detailed review of the relevant literature was made, being possible to realize the lack of similar surveys. In this scope, one can note the growing supply of non-linear TV services, with two effects: 1. a migration of the audience to these services, with structural changes, even if incipient, in the organization of programs and narratives; 2. A reinforcement of live television in the traditional linear TV. The present article provides an empirical basis for in-depth theoretical analysis, discussing a still incipient topic in communication sciences and related areas.Keywords: Catch-up TV, programming schedule, video on-demand, live TV. IntroduçãoA televisão tem sido objeto de estudo em inúmeras áreas. Cientistas e investigadores têm-se dedicado a estudar a televisão em áreas como a produção de conteúdos, tecnologias de transmissão e recepção, a forma como as pessoas consomem o conteúdo, o impacto da programação na sociedade, formas de publicidade, modelos de negócio, opinião pública, psicologia, sociologia, entre outras.Uma área que, de forma direta ou indireta afeta todas as restantes, centra-se no desenvolvimento e na introdução de novas tecnologias, especialmente do lado do cliente. É amplamente reconhecido que as novas tecnologias afetam especialmente o consumo e o modelo de negócios. Por exemplo, o surgimento dos

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Section: Revisão Aprofundada Da Literaturaunclassified

O desenvolvimento da TV não linear e a desprogramação da grelha

Becker

Abreu

Nogueira

et al. 2018

(OBS*)

View full text Add to dashboard Cite

show abstract

“…Concerning the Video Broadcasting delivery and scalability properties to be offered for large scale and heterogeneous networks, the authors in [56] adopted a Video on Demand (VoD) scheme where VBR videos are mapped over CBR channels and a traffic smoothing scheme with a buffering delay control are proposed. The same authors in [57], proposed novel broadcasting and proxy caching techniques in order to offer more scalability to the video delivery and to increase the overall performance of the system. In [58], the authors proposed a scheme to reduce the waiting time of the video application client side.…”

Section: Call Admission Control Algorithmsmentioning

confidence: 99%

Multimedia Traffic over Wireless and Satellite Networks

Rango¹,

Tropea²,

Fazio³

2010

Digital Video

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“…Dimensioning of caches for on-demand television services has been studied in [19] in the context of a cable television distribution network, in [9] in the context of Internet TV and in [8], [13], [18] in an IPTV context. Often, when determining the cache size, it is assumed that the popularity distribution of the offered multimedia content is a priori known and static.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of a caching algorithm for a catch-up television service

Avramova

Vleeschauwer²,

Wittevrongel

et al. 2010

Multimedia Systems

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The Catch-Up TV (CUTV) service allows users to watch video content that was previously broadcast live on TV channels and later placed on an on-line video store. Upon a request from a user to watch a recently missed episode of his/her favourite TV series, the content is streamed from the video server to the customer's receiver device. This requires that an individual flow is set up for the duration of the video, and since it is hard to impossible to employ multicast streaming for this purpose (as users seldomly issue a request for the same episode at the same time), these flows are unicast.In this paper we demonstrate that with the growing popularity of the CUTV service, the number of simultaneously running unicast flows on the aggregation parts of the network threaten to lead to an unwieldy increase in required bandwidth. Anticipating this problem and trying to alleviate it, the network operators deploy caches in strategic places in the network. We investigate the performance of such a caching strategy and the impact of its size and the cache update logic.We first analyse and model the evolution of video popularity over time based on traces we collected during ten months. Through simulations we compare the performance of the traditional LRU (Least-Recently Used) and LFU (Least-Frequently Used) caching algorithms to our own algorithm. We also compare their performance with a "perfect" caching algorithm, which knows and hence does not have to estimate the video request rates.In the experimental data we see that the video parameters from the popularity evolution law can be clustered.Therefore we investigate theoretical models than can capture these clusters and we study the impact of clustering on the caching performance. Finally, some considerations on the optimal cache placement are presented.

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Performance Study of Large-Scale Video Streaming Services in Highly Heterogeneous Environment

Cited by 18 publications

References 23 publications

O desenvolvimento da TV não linear e a desprogramação da grelha

O desenvolvimento da TV não linear e a desprogramação da grelha

Multimedia Traffic over Wireless and Satellite Networks

Performance analysis of a caching algorithm for a catch-up television service

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