- References
- Further reading
{{Multiple issues|{{orphan|date=February 2009}}{{expert needed|Telecommunications|date=January 2009}}
}}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 1. ^ITU Recommendation BS.1387
2. ^Introduction to Digital Audio Coding and Standards, by Marina Bosi and Richard E. Goldberg, Kluwer Academic Publishers (2002) {{ISBN|1-40207-357-7}}.
3. ^ITU Recommendation BS.1284
Further reading - {{cite book|title=Audio Signal Processing and Coding|author1=Andreas Spanias |author2=Ted Painter |author3=Venkatraman Atti |pages=401|chapter=Quality Measures for Perceptual Audio Coding|publisher=Wiley-Interscience|year=2007|isbn=9780471791478}}
- {{cite book|title=Digital Audio Watermarking Techniques and Technologies|author1=Nedeljko Cvejic |author2=Tapio Tapio Seppänen |publisher=Idea Group Inc|year=2007|isbn=9781599045153|pages=270|chapter=Subjective and Objective Quality Evaluation of Watremarked Audio}}
{{telecom-stub}}{{radio-comm-stub}} 1 : Digital audio |