In this paper, we provide some insight and background into the Dynamic Adaptive Streaming over HTTP (DASH) specifications as available from 3GPP in draft version also MPEG. Specifically, provides a normative description of Media Presentation, formats Segment, delivery protocol. addition, it adds an informative on how DASH Client may use provided information to establish streaming service for user. The solution supports different types (e.g., On-Demand, Live, Time-Shift Viewing), features...

H.264/AVC, the result of collaboration between ISO/IEC Moving Picture Experts Group and ITU-T Video Coding Group, is latest standard for video coding. The goals this standardization effort were enhanced compression efficiency, network friendly representation interactive (video telephony) non-interactive applications (broadcast, streaming, storage, on demand). H.264/AVC provides gains in efficiency up to 50% over a wide range bit rates resolutions compared previous standards. Compared...

Video transmission in wireless environments is a challenging task calling for high-compression efficiency as well network friendly design. Both have been major goals of the H.264/AVC standardization effort addressing "conversational" (i.e., video telephony) and "nonconversational" storage, broadcast, or streaming) applications. The compression performance coding layer typically provides significant improvement. network-friendly design goal addressed via abstraction that has developed to...

The scalable video coding (SVC) standard as an extension of H.264/AVC allows efficient, standard-based temporal, spatial, and quality scalability bit streams. Scalability a stream for media rate well device capability adaptation. Moreover, adaptation the signal is desirable key feature, if limitation in network resources, mostly characterized by throughput variations, varying delay or transmission errors, need to be considered. Typically, mobile networks throughput, errors connection (link)...

Raptor codes have been standardized as application layer forward error correction (FEC) for Multimedia Broadcast and Multicast Services (MBMS) Digital Video (DVB) due to their extraordinary advanced FEC protection performance. are known characteristics very close ideal provide a wide range of operating flexibility efficiency unmatched by other codes, in particular they an excellent implementation fountain codes. Until now, investigations the UMTS EPGRS used overall system model that does not...

In this work we address reliablefile delivery over mobile broadcast networks, concentrating on the Raptor codes as specified for Multimedia Broadcast/Multicast Services (MBMS) within 3GPP. We start by describing Luby-Transform (LT) codes, which are first practical fountain codes. Then, using a natural and easy to understand linear algebra notation, describe powerful extension of LT provide some insight into code structure guidelines implementation encoders decoders. Finally, selected...

Based on increasing availability of capture and display devices dedicated to immersive media, coding, transmission these media has recently become a highest-priority subject standardization. Different levels immersiveness are defined with respect an degree freedom in terms movements the observer within scene. The level ranges from three degrees allowing user look around all directions fixed point view six freedom, where can freely alter viewpoint moving pictures experts group (MPEG) ISO/IEC...

We consider streaming of video sequences over both constant and variable bit-rate (VBR) channels. Our goal is to enable decoding each unit before exceeding its displaying deadline and, hence, guarantee successful sequence presentation even if the media rate does not match channel rate. In this work, we show that separation between a delay jitter buffer decoder in general suboptimal for VBR transmitted specify minimum initial required given stream deterministic channel. addition, provide some...

H.264/AVC will be an essential component in emerging wireless video applications thanks to its excellent compression efficiency and network-friendly design. However, a coding standard itself is only one within the application transmission environment. Its effectiveness strongly depends on selection of appropriate modes parameters at encoder, decoder, as well network. In this paper we introduce features that make it suitable for applications, including error resilience, bit rate adaptation,...

Multimedia transmission has to handle a variety of compressed and uncompressed source signals such as data, text, image, audio, video. On wireless channels the error rates are high joint source/channel coding decoding methods advantageous. Also, system architecture adapt bad channel conditions. Several examples design given. We especially advocate use rate-compatible punctured systematic recursive convolutional (RCPRSC) codes which show lead straightforward versatile unequal protection (UEP)...

In this work we compare nonscalable video coding with data partitioning using H.264/AVC under similar application and channel constraints for conversational applications over mobile channels. For both systems optimized rate allocation network feedback has been applied. From the experimental results it is observed that based on average PSNR system outperforms system. However, percentage of entirely lost frames can be lowered, probability poor quality decoded reduced.

Emerging noninfrastructure-based network types like mobile ad-hoc networks (MANETs) are becoming suitable platforms for exchanging/sharing real-time video streams, because of recent progress in routing algorithms, throughput and transmission bit-rate. MANETs characterized by highly dynamic behavior the routes path outage probabilities. In this article a multisource streaming approach is presented to increase robustness MANETs. For that, coding as well channel techniques on application layer...

Recently, Multimedia Broadcast Multicast Service (MBMS) has been specified by 3GPP as a Release 6 feature in order to meet the increasing demands of multimedia download and streaming applications mobile scenarios. H.264, unique recommended video codec for MBMS, serves an essential component because its high compression efficiency easy network integration capability. In this study, we introduce analyze main system design parameters that influence performance H.264 encoded over EGPRS UMTS...

The delivery of digital television services over broadcast channels using the MPEG-2 transport stream (TS) is a well-established concept. Despite success this technology, advances and Internet protocol (IP)-based models with browser-centric media endpoints that combine broadband technologies as well new service requirements have resulted in alternatives to TS. These IP-based approaches are considered essential maintaining broadcast-centric services. This paper discusses an IP centric...

Insufficient quality due to packet loss is one of the main obstacles broad adoption IPTV services. However, with use end-to- end application layer reliability solutions services can be enabled over existing IP networks. In particular, forward error correction (AL-FEC) provide a straightforward and powerful means overcome loss. Different for different service types are introduced compared. Selected performance results provided show potential AL-FEC applications. From it verified that even in...

This paper investigates the performance of TCP-Friendly Rate Control (TFRC) to control transmission rate scalable video streams when used in a mobile network. The are encoded using Scalable Video Coding (SVC) extension H.264/AVC standard. Adding or removing layers is decided based on TFRC during varying channel conditions We conduct simulations various realistic use cases, evaluate and compare with without TFRC-based adaptation. results show significant improvements terms lower loss rate,...

MPEG DASH provides formats that are suitable to stream media content over HTTP. Typically, the client adaptively requests small chunks of based on available bandwidth and other resources. This client-pull technology has proven be more flexible, firewall-friendly CDN-scalable than server-push technologies. However, service providers have less control given decentralized client-driven nature DASH, which introduces new challenges for them offer a consistent possibly higher quality premium...

MPEG DASH provides formats that are suitable to stream segmented media content over HTTP. clients follow a client-pull paradigm by adapting their requests based on the available bandwidth and other local resources. This has proven be easier deploy CDN infrastructure than server-push technologies. However, this decentralised nature introduces new challenges such as offering consistent higher quality of service for premium users. is addressing issue in to-be-published part 5, Server...

MPEG-Dynamic Adaptive Streaming over HTTP (DASH) provides formats that are suitable to stream media content HTTP. Typically, the DASH client adaptively requests small chunks of based on available bandwidth and other resources. This client-pull technology has proven be more flexible, firewall-friendly, CDN-scalable than server-push technologies. However, service providers have less control given decentralized client-driven nature DASH, which introduces new challenges for them offer a...