QoE technologies

TeleMediQual Monitor can measure the Quality of Experience (QoE) of one or several audio/video telemedicine communications.

Only TeleMediQual Monitor can measure QoE.
IP QoS Monitor cannot measure QoE (but it can measure QoS).

To measure QoE, TeleMediQual Monitor uses the following technologies:

• A reduced-reference audio/video synchronization (lipsync) metric
• A reduced-reference video quality metric dedicated to open surgery
• A reduced-reference video quality metric dedicated to laparoscopic surgery
• A reduced-reference video quality metric dedicated to echography (ultrasound)
• A reduced-reference audio quality metric

These quality metrics belong to the family of "reduced reference" metrics because in order to measure the quality of a distorted signal (audio or video), the metric needs a short description of the reference signal. This short description is called the "reduced reference". The reference signal is the signal BEFORE distortions. In most cases, the reference signal is the signal (audio or video) before encoding.

Actually, since the reduced reference is compared to similar information from the distorted signal (a short description of the distorted signal), the processing can be divided in two types of agents:

• Several probes: each probe can process one audio signal and/or one video signal, compute short descriptions and send them to a measurement server
• One measurement server: that's the agent which receives short descriptions coming from probes. At least 2 probes must be used (one for the reference signal and one for the distorted signal). Then the measurement server can measure the quality of the distorted signal.