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High quality networking of audio-visual information

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1 Author(s)
Jayant, N. ; AT&T Bell Lab., Murray Hill, NJ, USA

An overview of low bit rate coding and the interaction between source coding and channel coding is presented. The interaction of coding with networking in a multiuser environment, including algorithms for robust coding which anticipate imperfect network performance, and techniques of decoding a signal that has traversed an imperfect network are described. The performances of such algorithms are illustrated with examples from speech, audio, and video transmission in the presence of packet losses. The challenges in measuring the quality of service (QOS) in the context of new algorithms for coding and networking and the difficulty of measuring QOS in the networking of multimedia information are discussed.<>

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Communications Magazine, IEEE  (Volume:31 ,  Issue: 9 )