Optimal Weights for Consensus of Networked Multi-Agent Systems
| Autor: | Xiang-Shun Li, Hua-Jing Fang |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Measurement method
Voice over IP Multimedia business.industry Computer science media_common.quotation_subject Multi-agent system Speech recognition Quality measurement Fundamental frequency computer.software_genre Computer Science (miscellaneous) Codec Quality (business) business computer media_common |
| Zdroj: | Information Technology Journal. 8:77-82 |
| ISSN: | 1812-5638 |
| DOI: | 10.3923/itj.2009.77.82 |
| Popis: | This paper presents an introduction about the Voice over Internet Protocol (VoIP) technology and some background infor-mation about fundamental frequency of Thai language and some different characteristics of fundamental frequency of child voice, male voices and female voices. Also, voice quality indicator and an overview of voice quality measurement methods have been presented. However, only subjective measurement methods were considered in detail. Moreover, brief information about voice codecs has been described. For the approach of this study, the data set from listening-opinion tests with G.711 and G.729 has been used and analyzed. Analyzed results from T-test and ANOVA show that G.711 and G.729 provide voice quality without difference significantly, although in cases of voices from children, female and male speakers. Therefore, this paper presents the evidence which is inconsistent with the general understanding of most engineers, who implement VoIP systems. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|