The objective difference grade (ODG) is calculated by perceptual evaluation of the audio quality algorithm specified in ITU BS.1387-1.(PEAQ) It corresponds to the subjective difference grade used in human-based audio tests. The ODG ranges from 0 to −4 and is defined as follows:
| Impairment description | ITU-R Grade | ODG |
|---|---|---|
| Imperceptible | 5.0 | 0.0 |
| Perceptible, but not annoying | 4.0 | −1.0 |
| Slightly annoying | 3.0 | −2.0 |
| Annoying | 2.0 | −3.0 |
| Very annoying | 1.0 | −4.0 |
Famous quotes containing the words objective, difference and/or grade:
“No actual skeptic, so far as I know, has claimed to disbelieve in an objective world. Skepticism is not a denial of belief, but rather a denial of rational grounds for belief.”
—William Pepperell Montague (1842–1910)
“Self-esteem creates natural highs. Knowing that you’re lovable helps you to love more. Knowing that you’re important helps you to make a difference to to others. Knowing that you are capable empowers you to create more. Knowing that you’re valuable and that you have a special place in the universe is a serene spiritual joy in itself.”
—Louise Hart (20th century)
“Life begins at six—at least in the minds of six-year-olds. . . . In kindergarten you are the baby. In first grade you put down the baby. . . . Every first grader knows in some osmotic way that this is real life. . . . First grade is the first step on the way to a place in the grown-up world.”
—Stella Chess (20th century)