Measurement
The main idea of measuring subjective video quality is the same as in the Mean Opinion Score for audio. To evaluate the subjective video quality of a video processing system:
- Choose video sequences for testing (they are often named SRC).
- Choose settings of system that you want to evaluate (often named HRC or Hypothetical Reference Circuit).
- Choose a test method (how sequences are presented to experts and how their opinion is collected: DSCQS, SSCQE, DSCS).
- Invite sufficient number of experts (18 or more is recommended).
- Carry out testing.
- Calculate average marks for each HRC based on experts' opinion.
Many parameters of the viewing conditions can influence the results, such as room illumination, display type, brightness, contrast, resolution, viewing distance, and the age and educational level of experts.
Read more about this topic: Subjective Video Quality
Famous quotes containing the word measurement:
“That’s the great danger of sectarian opinions, they always accept the formulas of past events as useful for the measurement of future events and they never are, if you have high standards of accuracy.”
—John Dos Passos (1896–1970)