Rate Adaptive Speech Coding for Universal Multimedia Access  

Oleh:

Homayounfar, K.

Jenis: Article from Bulletin/Magazine
Dalam koleksi: IEEE Signal Processing Magazine vol. 20 no. 2 (2003), page 30-39.
Topik: multimedia; rate; adaptive; speech cooding; universal multimedia

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: SS26.7 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

This article reviews state - of - the -a rt in transport adaptation techniques for mobile networks. It discusses the mechanisms for rate adaptation to combat quality degradations of speech caused by the radio links. It begins with a review of dynamic schemes for adaptation of speech encoders in cellular networks where we observe two distinct approaches to rate adaptation : network controlled and source controlled. The issues associated with adaptive voice over IP (VoIP) mechanisms are considered next. Here, the encoder detects some form of network congestion to judge how to behave itself for the good of the network. It is noted that this altruistic behaviour will only benefit coordinated IP networks such as private intranets and its application to the public Internet is improbable.

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