Perceptual Video Quality (PVQ)

With Tektronix Video Quality Monitors

Tektronix has expanded its Quality of Experience (QoE) monitoring solutions to include Perceptual Video Quality or effective MOS (eMOS). The PVQ feature ranks picture quality in real time from 0 to 5 (5 being the best) on both SD and HD programs (MPEG2 and H.264), so service providers can understand how video compression artifacts such as blocking video are affecting the viewer’s experience with the picture.  These problems are extremely difficult to detect and are becoming a critical issue to monitor as video content continues to grow while bandwidth is becoming more limited than ever.  Sentry’s eMOS is the industry’s first and only highly scalable “non-reference” perceptual quality score that correlates closely with the Tektronix PQA - the industry standard for picture quality test and measurement, used by leading encoder manufacturers worldwide.

Sentry accurately detects video artifacts and scores them as PVQ (or eMOS), which ranks video quality in a similar way as a Mean Opinion Score (MOS).  eMOS can be used, in the case when there are no technical “errors” in the transport stream, to measure perceptual video quality in the compressed domain.  In the example below, Sentry accurately grades the picture on the left as having compression artifacts, and the picture on the right without compression artifacts.