Exfo EXpert IPTV Test Tools (FTB-1 / 2 Pro) Manual de usuario Pagina 9
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A.1.1.1 Impact of Packet Loss and Jitter on Video Quality ............................................ 47
A.1.1.2 Impact of Packet Loss on Specific Video Codecs ............................................. 49
A.1.1.3 Playout Buffer Configuration .......................................................................... 50
A.1.2
ENCODING/DECODING IMPAIRMENTS ..................................................................... 50
A.1.2.1 Impact of Coding Bitrate on Video Quality ...................................................... 51
A.1.2.2 Performance of Video Coders ......................................................................... 53
A.1.2.3 Effective Coding Bitrate ................................................................................. 53
A.1.3 I
MPACT OF SUBJECTIVE FACTORS ON PERCEPTUAL QUALITY .......................................... 54
A.1.3.1 Video Content ............................................................................................... 54
A.1.3.2 Temporal Phenomena: Reaction Time, Masking and Recency Effects .............. 54
A.2 VQ
MON/HD QUALITY ANALYSIS ALGORITHM * ........................................................ 55
A.2.1 V
IDEO STREAM ANALYSIS ..................................................................................... 55
A.2.1.1 TR 101 290 Metrics Collection ........................................................................ 56
A.2.1.2 Playout Buffer Emulator ................................................................................ 56
A.2.1.3 Content Analysis ............................................................................................ 56
A.2.1.4 Frame Type Detection .................................................................................... 57
A.2.1.5 Per-frame Quality Analysis .............................................................................. 57
A.2.1.6 Perceptual Quality Model .............................................................................. 57
A.2.1.7 VQmon Markov Model (VMM) ....................................................................... 58
A.2.2 A
UDIO STREAM ANALYSIS ..................................................................................... 59
A.2.3
TELCHEMY VIDEO QUALITY METRICS ...................................................................... 60
A.2.3.1 Mean Opinion Scores (MOS) .......................................................................... 61
A.2.3.2 VQmon/HD Video Service Transmission Quality Metric - VSTQ ....................... 63
A.2.3.3 Degradation Factors ....................................................................................... 64
A.3 IP
TV PROTOCOLS ............................................................................................... 65
A.4 PCR
JITTER ....................................................................................................... 70
A.5 IGMP
LATENCY VS. ZAP TIME ................................................................................ 71
APPENDIX B TECHNICAL SPECIFICATION .............................................................................. 74
TROUBLESHOOTING ............................................................................................................. 77
GLOSSARY ...................................................................................................................... 78
- EXpert IPTV Test Tools 1
- WARNING 13
- CAUTION 13
- IMPORTANT 13
- Chapter 3 Getting Started 15
- Main Window 17
- 6.1 Setup Interface 18
- 6.2 Setup Thresholds 18
- 6.3 Manage Channel List 19
- 7.2 Passive Test 21
- 8.1 Basic IPTV Metrics Test 25
- Definitions: 26
- 8.2 Live Stream Preview 27
- 8.3.5 Video Frame Metrics 35
- 8.3.6 Video Bandwidth 37
- 9.1 Test Results Log 39
- Appendix A 45
- 10MSEbr 51
- A.2.1 Video Stream Analysis 55
- ™ (Telchemy 60
- A.3 IPTV Protocols 65
- A.4 PCR Jitter 70
- Troubleshooting 77
- Glossary 78
- Description 80
- TR 101 290 MPEG Metrics 81
- Metric Description 81
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