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Video Broadcast (video + broadcast)

Distribution by Scientific Domains
Engineering75%

Kinds of Video Broadcast

  • digital video broadcast
    		•

    Selected Abstracts

    GSE: A flexible, yet efficient, encapsulation for IP over DVB-S2 continuous generic streams

    INTERNATIONAL JOURNAL OF SATELLITE COMMUNICATIONS AND NETWORKING, Issue 3 2008
    Juan Cantillo
    Abstract The second-generation specification for Digital Video Broadcast over Satellite, DVB-S2, defines an improved and adaptive physical layer. A new framing structure at the link layer, known as the generic stream (GS), is introduced offering an alternative to the well-known MPEG transport stream (TS). This paper presents the requirements for and the design of an encapsulation protocol to transport IPv4 and IPv6 datagrams and other network protocol packets directly over DVB-S2 using this GS profile. The resulting generic stream encapsulation (GSE) is a novel method that provides flexible encapsulation with support for fragmentation. A flexible extension header format allows GSE to carry additional header information, suitable for enhanced features, such as link layer encryption and IP header compression. The paper assesses GSE performance by simulation using realistic traffic profiles and attenuation fading. This demonstrates considerable improvement in efficiency compared with the MPE/MPEG-2 TS, especially when used with adaptive coding and modulation (ACM). Although designed for DVB-S2 systems, the new encapsulation is suitable for other second-generation physical layer standards. Copyright © 2008 John Wiley & Sons, Ltd. [source]

    Enhanced system design for download and streaming services using Raptor codes,,

    EUROPEAN TRANSACTIONS ON TELECOMMUNICATIONS, Issue 2 2009
    Tiago Gasiba
    Raptor codes have been recently standardised by 3rd Generation Partnership Project (3GPP) to be used in the application layer (AL) for multimedia broadcast and multicast services (MBMS) including download delivery and streaming delivery. Furthermore, digital video broadcast (DVB) has also recommended the inclusion of these Raptor codes for IP-datacast services. In this paper, enhancements on the system and receiver design using Raptor codes are studied, namely the permeable layer receiver (PLR) and the individual post-repair mechanism. With the PLR, the partial information ignored in the conventional receiver is passed from lower layer to higher layer. We show how a practical and efficient implementation of the Raptor decoder as a PLR can be done, which can not only achieve huge performance gains, but the gains can be achieved at an affordable low decoding complexity. Whereas the PLR is employed for enhancing both download and streaming services, the post-repair aims at guaranteeing reliable download delivery when a feedback channel is available. We propose here two efficient post-repair algorithms which fully exploit the properties of the Raptor codes. One allows to find a minimum set of source symbols to be requested in the post-delivery, and another allows to find a sufficient number of consecutive repair symbols. Selected simulations verify the good performance of proposed techniques. Copyright © 2008 John Wiley & Sons, Ltd. [source]

    Providing IP QoS over GEO satellite systems using MPLS

    INTERNATIONAL JOURNAL OF SATELLITE COMMUNICATIONS AND NETWORKING, Issue 5 2001
    Tolga Ors
    Abstract Multi-protocol label switching (MPLS) is a promising technology that is quickly gathering momentum as a solution for delivering quality of service (QoS) on IP-based terrestrial networks. It is then appropriate to wonder how this technology could affect the next generation satellite networks (from at least an interoperability standpoint) and if satellite network designers should implement MPLS on their space segment (and if yes, how?). These are the main questions that this paper is addressing. We will show how MPLS can be used on top of any layer 2 technology on the space segment, to provide IP QoS. In particular we will discuss MPLS over ATM over satellite where MPLS is essentially used to control and manage an on-board ATM switch fabric. Problems with MPLS and solutions will be presented. As the digital video broadcast (DVB) standard is becoming popular to be used on both the forward and return link, the different methods to carry IP over DVB will also be discussed. Copyright © 2001 John Wiley & Sons, Ltd. [source]

    Enhanced video streaming network with hybrid P2P technology

    BELL LABS TECHNICAL JOURNAL, Issue 3 2008
    Yugu Zeng
    Hybrid peer-to-peer (P2P) approaches combine the cost advantages of P2P solutions with the quality and capacity characteristics of hosted content server solutions. Thousands of users have home devices providing many streaming and storage resources that promise superior scalability and adaptability over server-based content distribution networks. On the other hand, the involvement of these peers is encumbered by additional latency and resource management overhead. In this paper, we describe how the capacity advantage of hybrid P2P solutions over pure P2P solutions translates into higher achievable bit rates. The modeling and analysis of a heterogeneous architecture presented provides insight into the achievable system latency and design directions for topology resource management. The results indicate the potential of hybrid P2P approaches to serve as a cost-effective streaming platform with bit rates and latency quality close to those of other digital video distribution systems such as digital video broadcast- satellite (DVB-S) or Internet Protocol television (IPTV), but with better deployment flexibility for the future digital media "prosumer" models. © 2008 Alcatel-Lucent. [source]