Comparison category-rating tests measure whether processing improved or worsened a signal
Evidence
In situations in which the processed signal could be evaluated as being either better or worse, a comparison category-rating (CCR) test can be used. Its rating scale is shown in Table 7.3, and it can be seen that it is a symmetric two-sided scale. Listeners are asked to rate the two signals presented in terms of the quality of the second signal relative to the first. The CCR test might be used if one is interested in the effect of a signal-processing methodology being applied to an audio signal, such as noise reduction, in terms of whether it has improved the original signal. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2395
Categorization
- DEFINE: Defines the CCR testing methodology and when it applies versus DCR and ACR tests.
Related
- Comparison category-rating tests measure whether processing improves or degrades audio. (similarity 0.98)
- Comparison rating tests use two-sided scales for signal processing effects (similarity 0.92)
- Degradation category-rating tests evaluate processed signals against the unprocessed original. (similarity 0.85)
- Absolute category-rating tests average listener ratings into a mean opinion score. (similarity 0.82)
- ACR tests average five-point ratings into a mean opinion score (similarity 0.80)