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Perceptual-Based Playout Mechanisms for Multi-Stream Voice over IP Networks

Chun-Feng WU, Wen-Whei CHANG, Yuan-Chuan CHIANG

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Summary :

Packet loss and delay are the major network impairments for transporting real-time voice over IP networks. In the proposed system, multiple descriptions of the speech are used to take advantage of the packet path diversity. A new objective method is presented for predicting the perceived quality of multi-stream voice transmission. Also proposed is a multi-stream playout buffer algorithm, together with an adaptive parameter adjustment scheme, that maximizes the perceived speech quality via delay-loss trading. Experimental results showed that, compared to FEC-protected single-path transmission, the proposed multi-stream transmission scheme achieves significant reductions in delay and packet loss rates as well as improved speech quality.

Publication
IEICE TRANSACTIONS on Information Vol.E94-D No.5 pp.1018-1025
Publication Date
2011/05/01
Publicized
Online ISSN
1745-1361
DOI
10.1587/transinf.E94.D.1018
Type of Manuscript
PAPER
Category
Information Network

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