Publication

Optimal FEC Rate for Media Streaming in Active Networks

Pascal Frossard
2004
Conference Papers

Abstract

This paper addresses the problem of optimal channel rate allocation for media streaming in active networks, where intermediate nodes are able to perform basic FEC decoding/encoding operations. FEC performance is analyzed in the case of hop-by-hop FEC protection, and compared with an end-to-end FEC scenario, in order to demonstrate the benefits of FEC operations in the intermediate nodes. An optimization problem is formulated, based on a distortion model for video streaming over lossy channels. Finally, the two streaming scenarios are compared in the particular case of MPEG-4 video, under a constrained end-to- end delay. FEC operations in intermediate nodes are shown to become especially useful when the links on the streaming path have quite heterogenous characteristics.

Official source

https://infoscience.epfl.ch/entities/publication/9792a30f-35a7-4441-815e-2cc571303493

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Pascal Frossard
2004
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/9792a30f-35a7-4441-815e-2cc571303493

About this result

Related concepts (32)

Streaming media

Streaming media is multimedia that is delivered and consumed in a continuous manner from a source, with little or no intermediate storage in network elements. Streaming refers to the delivery method of content, rather than the content itself. Distinguishing delivery method from the media applies specifically to telecommunications networks, as most of the traditional media delivery systems are either inherently streaming (e.g. radio, television) or inherently non-streaming (e.g. books, videotapes, audio CDs).

Error correction code

In computing, telecommunication, information theory, and coding theory, forward error correction (FEC) or channel coding is a technique used for controlling errors in data transmission over unreliable or noisy communication channels. The central idea is that the sender encodes the message in a redundant way, most often by using an error correction code or error correcting code (ECC). The redundancy allows the receiver not only to detect errors that may occur anywhere in the message, but often to correct a limited number of errors.

Adaptive bitrate streaming

Adaptive bitrate streaming is a technique used in streaming multimedia over computer networks. While in the past most video or audio streaming technologies utilized streaming protocols such as RTP with RTSP, today's adaptive streaming technologies are based almost exclusively on HTTP, and are designed to work efficiently over large distributed HTTP networks. Adaptive bitrate streaming works by detecting a user's bandwidth and CPU capacity in real time, adjusting the quality of the media stream accordingly.

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