Title :
High quality networking of audio-visual information
Author_Institution :
AT&T Bell Lab., Murray Hill, NJ, USA
Abstract :
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.<>
Keywords :
audio-visual systems; decoding; image coding; multimedia systems; telecommunication networks; telecommunication services; QOS measurement; algorithms; audio transmission; audio-visual information; channel coding; decoding; low bit rate coding; multimedia information; multiuser environment; network performance; networking; packet losses; quality of service; source coding; speech transmission; video transmission; Asynchronous transfer mode; Bandwidth; Bit rate; Image coding; Image sampling; Robustness; Sampling methods; Signal processing; Speech coding; Video compression;
Journal_Title :
Communications Magazine, IEEE
