User Perceived Codec and Duplex Aware Playout Algorithms and LMOS-DMOS Measurement for Real Time Streams

Kuo Kun Tseng*, Ying-Dar Lin

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

Abstract

In the network devices for real time streaming, e.g. VoIP phone, video phone and online game, the playout algorithm controls the playout delay to eliminate the jitter and to minimize the overflow packet loss. Conventional algorithms did this based on network delay only; they did not consider the user perceived quality, and aware the codec and communication duplex mode. Therefore, we present two novel approaches: codec aware adaptive playout (CAAP) and duplex aware adaptive playout (DAAP), they intent to optimize the user perceived quality based on codec and communication duplex mode respectively. Because of their different characteristics, CAAP and DAAP can work either alone or together; and their improvements are accumulative. The out-performance of CAAP and DAAP are superior the prior algorithms in our substantial but conservative evaluation. Since no objective mechanisms for measuring the speech quality of two-way communication exist; a new LMOS-DMOS measurement mechanism is also proposed. Although VoIP is an exemplary embodiment in this paper, we formally model our algorithms into a generalized user perceived QoS control as well.

Original languageEnglish
Pages1666-1669
Number of pages4
StatePublished - 1 Dec 2003
Event2003 International Conference on Communication Technology, ICCT 2003 - Beijing, China
Duration: 9 Apr 200311 Apr 2003

Conference

Conference2003 International Conference on Communication Technology, ICCT 2003
CountryChina
CityBeijing
Period9/04/0311/04/03

Keywords

  • Network Jitter
  • Playout Algorithm
  • Real Time Streaming
  • Speech Quality Measurement
  • User perceived Quality

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