An H.264/SVC-based adaptation proxy on a WiFi router

Kofler, Ingo; Prangl, Martin; Kuschnig, Robert; Hellwagner, Hermann

doi:10.1145/1496046.1496061

Cited by 26 publications

(16 citation statements)

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“…Thus, the loss of important transmission units due to congestion can be avoided and the overall error resilience of the video transmission service can be substantially improved. Design options of in-network adaptation of SVC have been described in previous work [6] and first measurements of SVCbased adaptation in an off-the-shelf WiFi router have been reported in [7]. More complex adaptation operations that will be required to create scalable media resources, such as transcoding [8] of media resources which have increased memory or CPU requirements, will be performed at the edge nodes only, i.e., in the Home-Boxes.…”

Section: Scalable Video Coding and Content-aware Networkmentioning

confidence: 99%

Scalable Video Coding in Content-Aware Networks: Research Challenges and Open Issues

Grafl

Timmerer

Hellwagner

et al. 2011

Trustworthy Internet

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The demand for access to advanced, distributed media resources is nowadays omnipresent due to the availability of Internet connectivity almost anywhere and anytime, and of a variety of different devices. This calls for rethinking of the current Internet architecture by making the network aware of which content is actually transported. This paper introduces Scalable Video Coding (SVC) as a tool for Content-Aware Networks (CANs) which is currently researched as part of the EU FP7 ALICANTE project. The architecture of ALICANTE with respect to SVC and CAN is presented, use cases are described, and finally research challenges and open issues are discussed.

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Section: Scalable Video Coding and Content-aware Networkmentioning

confidence: 99%

Scalable Video Coding in Content-Aware Networks: Research Challenges and Open Issues

Grafl

Timmerer

Hellwagner

et al. 2011

Trustworthy Internet

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“…Thereby, the adaptability of the coded sequence is obtained by changing the number of enhancement layers transmitted from the sender side. In the literature, there are several papers summarizing the above concept (e.g., [39] [40]), and extending it for different scenarios such as in-network adaptation with encryption [41] and adaptation of the SVC stteam on a network device [42]. However, concern with the SVC is that it can only achieve bittates in a limited set usually decided at coding time.…”

Section: Video Adaptationmentioning

confidence: 99%

An architecture for federated video processing and online streaming

Iqbal¹

2010

SIGMultimedia Rec.

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Today access to video is available via numerous multimedia enabled devices through a wide variety of network types. What is required is a mechanism to ensure that users can receive different qualities of video proportional to their device capabilities and network conditions. In this thesis, we propose an online adaptive video streaming approach which uses the Peer-to-Peer (P2P) paradigm to not only distribute the content using peers' bandwidth, but also adapt the video using peers' processing power, while taking into account receiver heterogeneity, watermarking, and perceptual encryption.

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“…In [20], we describe H.264/SVC adaptation on an off-the-shelf wireless router, demonstrating the feasibility of such a MANE.…”

Section: In-network Adaptationmentioning

confidence: 99%

Efficient in-network adaptation of encrypted H.264/SVC content

Hellwagner

Kuschnig

Stütz

et al. 2009

Signal Processing: Image Communication

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This paper addresses the efficient adaptation of encrypted scalable video content (H.264/SVC). RTP-based in-network adaptation schemes on a media aware network element (MANE) in an IPTV and VoD scenario are considered.Two basic alternatives to implement encryption and adaptation of H.264/SVC content are investigated: (i) full, format-independent encryption making use of Secure RTP (SRTP); (ii) SVC-specific encryption that leaves the metadata relevant for adaptation (NAL unit headers) unencrypted.The SRTP-based scheme (i) is straightforward to deploy, but requires the MANE to be in the security context of the delivery, i.e., to be a trusted node. For adaptation, the content needs to be decrypted, scaled, and re-encrypted. The SVC-specific approach (ii) enables both full and selective encryption, e.g., of the base layer only. SVC-specific encryption is based on own previous work, which is substantially extended and detailed in this paper. The adaptation MANE can now be an untrusted node; adaptation becomes a low-complexity process, avoiding full decryption and re-encryption of the content. This paper presents the first experimental comparison of these two approaches and evaluates whether multimedia-specific encryption can lead to performance and application benefits. Potential security threats and security properties of the two approaches in the IPTV and VoD scenario are elementarily analyzed. In terms of runtime performance on the MANE our SVC-specific encryption scheme significantly outperforms the SRTP-based approach. SVC-specific encryption is also superior in terms of induced end-to-end delays. The performance can even be improved by selective application of the SVC-specific encryption scheme. The results indicate that efficient adaptation of SVC-encrypted content on low-end, untrusted network devices is feasible.

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An H.264/SVC-based adaptation proxy on a WiFi router

Cited by 26 publications

References 1 publication

Scalable Video Coding in Content-Aware Networks: Research Challenges and Open Issues

Scalable Video Coding in Content-Aware Networks: Research Challenges and Open Issues

An architecture for federated video processing and online streaming

Efficient in-network adaptation of encrypted H.264/SVC content

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