Temat: VOD - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Videotoms in Objective and Subjective Quality Tests of Video
Autorzy:: Trzcianowski, Ł
Powiązania:: https://bibliotekanauki.pl/articles/308283.pdf
Data publikacji:: 2014
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: Digital Television
IPTV
quality of service
Video-toms
VoD
Opis:: This paper proposes idea of videotoms usage in quality tests of video signals. This concept simplifies parametric model creation for television services such as IPTV (Internet Protocol Television), VoD (Video on Demand) and others. Videotom is simple, well-defined video sequence in the context of video quality tests. Presented idea was used in both objective and subjective tests of influence selected network parameters: jitter of delay, packet loss and packet corrupt on the video quality measured using Mean Square Error (MSE) and Mean Opinion Score (MOS) metrics. Results showed that proposed method is useful especially for subjective tests and it can reduce costs and time for them.
Źródło:: Journal of Telecommunications and Information Technology; 2014, 1; 27-31
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: QoS Conditions for VoIP and VoD
Autorzy:: Dymarski, P.
Kula, S.
Huy, T. N.
Powiązania:: https://bibliotekanauki.pl/articles/307870.pdf
Data publikacji:: 2011
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: delay jitter
packet loss rate
PESQ
POLQA
quality of service
VoD
VoIP
VQM
VQmon
Opis:: 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.
Źródło:: Journal of Telecommunications and Information Technology; 2011, 3; 29-37
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

Artykuł

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