Exfo EXpert IPTV Test Tools (FTB-1 / 2 Pro) Instrukcja Użytkownika Pobierz pdf (Strona 64)

A.2.3.3 Degradation Factors

To facilitate troubleshooting, VQmon/HD has the ability to obtain a breakdown of factors

contributing to quality degradation. VQmon/HD reports the severity of quality degradation

(on a scale of 0-10, with 0 indicating no degradation and 10 indicating the most severe level of

degradation) attributable to each of the following factors:

• Packet loss

• Audio-video sync

• Codec quantization

• GOP length

• Codec bandwidth restriction

• Frame resolution

• Packet discards due to jitter

• Frame rate

• (One-way) delay

• Recency

*Note: Information in this document is proprietary to Telchemy, Incorporated and was

published with its permission.

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Exfo EXpert IPTV Test Tools (FTB-1 / 2 Pro) Instrukcja Użytkownika Strona 64