Objective difference grade
The objective difference grade (ODG) is calculated by perceptual evaluation of the audio quality algorithm specified in ITU BS.1387-1.(PEAQ)[1] It corresponds to the subjective difference grade used in human-based audio tests.[2] The ODG ranges from 0 to −4 and is defined as follows:
| Impairment description | ITU-R Grade[3] | 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 |
References
- ↑ ITU Recommendation BS.1387
- ↑ Introduction to Digital Audio Coding and Standards, by Marina Bosi and Richard E. Goldberg, Kluwer Academic Publishers (2002) ISBN 1-40207-357-7.
- ↑ ITU Recommendation BS.1284
Further reading
- Andreas Spanias; Ted Painter; Venkatraman Atti (2007). "Quality Measures for Perceptual Audio Coding". Audio Signal Processing and Coding. Wiley-Interscience. p. 401. ISBN 9780471791478.
- Nedeljko Cvejic; Tapio Tapio Seppänen (2007). "Subjective and Objective Quality Evaluation of Watremarked Audio". Digital Audio Watermarking Techniques and Technologies. Idea Group Inc. p. 270. ISBN 9781599045153.
This article is issued from Wikipedia - version of the 6/4/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.