Parametric metrics
Our parametric metrics are fast. In fact they don't really take more time than video decoding. Why? Because actually they catch up information from the video decoder and use it to compute the video quality score.
For example, these metrics get the type of frame (I, B, P), the QP values, the motion vectors, the decoding status of each macroblock (correctly decoded or badly decoded due to packet loss).
This information is injected in a Human Vision model which computes a video quality score.
These parametric are specially interesting when measuring the impact of transmission errors on perceived video quality. Opposite to QoS (Quality of Service) metrics that measure a packet loss rate but don't know the impact of each lost packet on video quality,
our parametric solutions DO decode video and KNOW the impact of a lost packet on QoE.
We have developed parametric metrics for the two major codecs:
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