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“Proposal for the Validation of the Video Quality of IPTV Service”
Eng. Luis Enrique Conde del [email protected]: 537 2666825 Mobile 53 52884472
• Background.
Current scenarioof Telecom
Carriers
• Obsolescence of TDM Technology.
• Requirements for new services and increase of the current services. - Fixed telephone service growth. - Mobile service growth - Wide development of data services. - Introduction of novel services such as IPTV.
Proposal of Development
• Development of Services on NGN networks with NAM (GIE).• Optimization of National Transport Network IP/MPLS.• Designs and implementation of Local and Regional Metro Networks.• Introduction of the objective quality validation of services in real time (and its extension to quality profile of telecommunications network).
Beginning of the scheduled development
• Different levels of a NGN Network.
BRAS PE
IP/MPLS
AR BRAS PEAR
METROREGIONAL
Service PoPService PoP
METROPROVINCIAL
ADMADM
ADMADM
ADMADM
Eth/SDH
Source: VPDT. ETECSA.
E1
STMn
FE
GE
VoDVoD
VoD
• Technical Requirements for Packet Transport Network
Interfaces:
Level of PTN Equipment:
Characteristics:
• Technical Requirements for Packet Transport Network
Transport:
• Technical Requirements for Packet Transport Network
Quality of Service
Characteristics Carrier Class
Synchronization
• Technical Requirements for Packet Transport Network
Standards for NGN Equipment
Minimal necessary interfaces
• IPTV Service proposed at the different levels of a NGN Network.
BRAS PE
IP/MPLS
AR BRAS PEAR
METROREGIONAL
Service PoPService PoP
METROPROVINCIAL
ADMADM
ADMADM
ADMADM
Eth/SDH
Source: VPDT. ETECSA.
E1
STMn
FE
GE
Platform of IPTVVoDVoD
VoD
• QoE and QoS.
SLA SLA SLA
Human Vision Constraints
Perceived Quality (QoE)
STB influence
Quality dependence of
the Service
Network Quality (QoS)Source: VPDT. ETECSA.
• Proposal of validation points of IPTV quality service.
ServPOP 2
DWDMServ
POP 4
Serv POP 1
ServPOP 3
Pseudo ringEthernet
Pseudo anilloEthernet
Pseudo ringEthernet
Punto 3Validación
Punto 2Validación
IPTV
Head End
Punto 1Validación
(Encrypted Signal)
(Encrypted Signal)
(No Encrypted signal)
Source: VPDT. ETECSA.
•State of the art of validation Metrics for video quality.
Métricas(VQM)
MétricasSubjetivas
BT.500.11 (Imágenes de TV).P.910 (Aplic. de Multimedia), Calidad de video.P.911 (Aplic. de Multimedia), Calidad Audiovisual.
Comparación Implícita (DSCQS).Comparación Explícita (DSIS)Valoraciones Absolutas (SSCQE)Valoraciones con Categoría Absoluta (ACR).Métricas
Objetivas
Ref. Completa.Ref. Reducida.Sin Referencia.
Métricas de Imágenes
Análisis de la Informaciónvisual contenida.
• VHS Metric.(Aspectos de la visión Humana)
Métricas Datos
Análisis de Videos Decodificados.
• MSE• PSNR(Evaluación de Paquetes)
Métricas Flujos de Video
•T- Factor (Profunda Inspección del flujo del Video (TS y UDP) Depende del Codec y muestra el impacto de los disturbios de la Red en las pérdidas y su propagación (espacial y temporal).• MDI (Ligera Inspección del flujo del Video (TS y UDP) Independiente del Codec Red IP.
Correlación
FreeProbe with T- Factor Metric
• Windows (GUI) of FreeProbe (Metric T-Factor) and FreeProbe (Metric MDI).
Fuente Telecom Italia - VPDT. ETECSA.FreeProbe with MDI Metric
•Pilot Test using FreeProbe (T-Factor), a simulation of Orange solution.
Source: VPDT. ETECSA.
• IPTV Service Test Model applied at ETECSA laboratories.
Source: VPDT. ETECSA.
ETECSA’sDomestic Intranet
• Test Results of FreeProbe (Metric MDI). ETECSA’s Intranet vs BPL.
VLAN QoS
Source: VPDT. ETECSA.
VLAN 10
VLAN 20
VLAN 30
Best effort
• Tests using NetDisturb in the testing model and classification of the subjective quality experienced by the end user
Video Server NetDisturb
Fuente VPDT. ETECSA.
Source: Telecom Italia – VPDT ETECSA.
Source: Telecom Italia - VPDT. ETECSA.
• Test results done in the testing model (Channel SD to 4 Mbps)
• Original video VS Original video with 1% Packet Loss Rate.
• Original Video. •Video with 1% Packet Loss Rate.
ServPOP 2
DWDM
ServPOP 4
Serv POP 1
ServPOP 3
Pseudo ringEthernet
Pseudo ringEthernet
Pseudo ringEthernet
CUB
Source: Telecom Italia - VPDT. ETECSA.
FreeProbe
FreeProbe Server
Measurement point
Data collect
FreeProbe
IPTV
Head End
FreeProbe
•Centralization of QoE Validation with FreeProbe to substitute solutions with Shadow Router. (Cisco, Tektronix, JDSU)
Metric MDI
Metric MDI
Metric T-Factor
SNMPSNMP
SNMP
Quality Profile on networks, according to the following ITU-T Recommendations G.1050, TIA-921 and ITU-T Y.1541
Source: UIT-T.
Fuente Spirent.
DSL Forum's WT-126
•SD. 1 paq./perd cada 30 minutos.(MLR=0.004 paq/seg)
•HD 1paq./perd. cada 4 horas(MLR=0.0005 paq/seg)
Source: DSL Forum's WT-126
• ConclusionsThe introduction of Ethernet Metro networks in ETECSA constitutes the main core for the development of ETECSA’s target network guarantying the growing requested by the MIC in the triennium, as well as the incorporation of new services like IPTV.
The experiences on IPTV services validation in Telecom Italia using Free Probe has been the starting point of valuable research experiences carried out in ETECSA together with the development and programming of an IPTV service platform used in this telecom company. It was done as from the study of the VideoLAN software code source which reduced the cost of research stage.
The proposal of using Free Probe to validate the quality profile of ETECSA’s IP network makes it an important alternative for the expensive purchase of Shadow Router dedicated to this unique function that can be extended to other services in real time like VoIP with an adaptation of the MDI metric.
The fulfillment of the recommendations made at the DSL Forum WT-126 is the base of IPTV quality service in SD and HD formats, for which networks must meet the quality profile according to UIT-T Y 1541.
The application of probes with T-Factor metric can be enlarged to quality validation of TDT and 3G mobile systems.
In line with the world…1994 - 2010
16 Anniversary