EXFO EXpert IPTV Test Tools (FTB-200v2) - Manual (Page 58)

58
Figure 2‐7.
VQmon/H
D video
stream
quality
analysis
algorithm
A.2.1.1 TR 101 290 Metrics Collection
VQmon/HD collects and reports the full set of Priority 1 and 2 metrics described in TR
101 290 for the measurement and analysis of MPEG‐2 Transport streams.
A.2.1.2 Playout Buffer Emulator
VQmon/HD’s playout buffer emulator component detects lost, duplicate, and out‐of‐
sequence packets and measures packet‐to‐packet delay (jitter) levels, reporting PPDV
(RFC3550) and MAPDV (ITU‐T G.1020). Detailed IPTV packet loss/discard statistics are
provided, along with metrics evaluating the effectiveness of Forward Error Correction (FEC), if
used. If Reliable UDP is in use, VQmon/HD reports the proportion of retransmitted packets
and the impact on bandwidth due to retransmission.
A.2.1.3 Content Analysis
VQmon/HD performs high‐level content analysis to detect levels of detail, motion, and
panning, and can also detect some scene changes. VQmon/HD also recognizes abnormal
content conditions (including no content, noise/snow, and frozen image) and can generate
alerts if they are detected.