Joint playout and FEC control for multi-stream voice over IP networks

Chun Feng Wu, Yuan Chuan Chiang, Wen-Whei Chang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


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

Original languageEnglish
Pages (from-to)224-235
Number of pages12
JournalJournal of the Chinese Institute of Engineers, Transactions of the Chinese Institute of Engineers,Series A/Chung-kuo Kung Ch'eng Hsuch K'an
Issue number2
StatePublished - 30 May 2013


  • Forward error control
  • Multiple description coding
  • Playout buffer
  • Voice quality prediction model

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