Publication

New Network and ATM Adaptation Layers for Interactive MPEG-2 Video Communications: A Performance Study Based on Psychophysics

1998
Journal Articles

Abstract

In this paper, we present new Network and ATM Adaptation Layers for interactive MPEG-2 video communications. These layers provide reliable transmission by applying per-cell sequence numbering combined with a selective Forward Error Correction (FEC) mechanism based on Burst Erasure codes. We compare the performance of the proposed scheme with a transmission over AAL5 by simulating the transport of an MPEG-2 sequence over an ATM network. Performance is measured in terms of Cell Loss Ratio (CLR) and user perceived quality. The proposed layers achieve significant improvements on the cell loss figures obtained for AAL5 under the same traffic conditions. To evaluate the impact of cell losses at the user level, we apply a perceptual quality metric to the decoded MPEG-2 sequences. According to the computational metric and subjective rating, the proposed multimedia AAL (MAAL) achieves a graceful quality degradation. The application of a selective FEC achieves an even smoother image quality degradation with a low overhead

Official source

https://infoscience.epfl.ch/entities/publication/854f68b1-c72a-4717-aebe-9ccda2a0cbbd

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1998
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/854f68b1-c72a-4717-aebe-9ccda2a0cbbd

About this result

Related concepts (32)

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.

Error detection and correction

In information theory and coding theory with applications in computer science and telecommunication, error detection and correction (EDAC) or error control are techniques that enable reliable delivery of digital data over unreliable communication channels. Many communication channels are subject to channel noise, and thus errors may be introduced during transmission from the source to a receiver. Error detection techniques allow detecting such errors, while error correction enables reconstruction of the original data in many cases.

MPEG-2

MPEG-2 (a.k.a. H.222/H.262 as was defined by the ITU) is a standard for "the generic coding of moving pictures and associated audio information". It describes a combination of lossy video compression and lossy audio data compression methods, which permit storage and transmission of movies using currently available storage media and transmission bandwidth. While MPEG-2 is not as efficient as newer standards such as H.264/AVC and H.

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New Network and ATM Adaptation Layers for Interactive MPEG-2 Video Communications: A Performance Study Based on Psychophysics

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