QoS Conditions for VoIP and VoD

• 出版年: Journal of Telecommunications and Information Technology
• 主要な著者: Przemysław Dymarski, Sławomir Kula, Thanh Nguyen Huy
• フォーマット: 論文
• 言語: 英語
• 出版事項: National Institute of Telecommunications 2023-06-01
• 主題: delay jitter; packet loss rate; PESQ; POLQA; quality of service; VoD
• オンライン･アクセス: https://jtit.pl/jtit/article/view/1155
• ISSN: 1509-4553; 1899-8852

This paper concerns quality evaluation of the telecommunication services: VoIP (representing the RT interactive class) and VoD (representing the MM streaming class). Subjective and objective methods and tools for perceived quality measurement are analyzed and compared. Subjective tests are performed for selected video sequences using the Double-Stimulus Impairment Scale (DSIS) method. Thus the objective algorithms (VQM and VQmon) are calibrated. Speech quality is measured using the objective methods: PESQ and POLQA. Threshold values for network parameters (packet loss rate, delay jitter) are set, that guarantee the acceptable service quality.