BS.1387: Difference between revisions
No edit summary |
|||
| Line 1: | Line 1: | ||
'''EAQUAL''' stands for ''Evaluation Of Audio Quality''. It's an '''objective''' measurement technique used to measure the quality of encoded/decoded audio files ''(very similiar to PEAQ)''. It acts in contrast to more the common place '''subjective''' testing methodology deployed using [[ABX]] and [[ABC/HR]] reference testing ''(frequently preferred by hydrogenaudio)''. It's part of the ITU-R recommendation BS.1387. Several tests have been performed using EAQUAL most notably using numerous [http://www.hydrogenaudio.org/forums/index.php?showtopic=20264 AAC encoders] to determine via a [http://en.wikipedia.org/wiki/Pearson_correlation Pearson Correlation] the linear relationship between human ratings and EAQUAL ratings on a given set of test samples. The results however using objective testing methodologies are still inconclusive. | '''EAQUAL''' stands for ''Evaluation Of Audio Quality''. It's an '''objective''' measurement technique used to measure the quality of encoded/decoded audio files ''(very similiar to PEAQ)''. It acts in contrast to more the common place '''subjective''' testing methodology deployed using [[ABX]] and [[ABC/HR]] reference testing ''(frequently preferred by hydrogenaudio)''. It's part of the ITU-R recommendation BS.1387. Several tests have been performed using EAQUAL most notably using numerous [http://www.hydrogenaudio.org/forums/index.php?showtopic=20264 AAC encoders] to determine via a [http://en.wikipedia.org/wiki/Pearson_correlation Pearson Correlation] the linear relationship between human ratings and EAQUAL ratings on a given set of test samples. The results, however when using objective testing methodologies are still inconclusive and mostly only used by codec developers and researchers. | ||
===Testing Using EAQUAL=== | ===Testing Using EAQUAL=== | ||
Revision as of 05:54, 31 August 2005
EAQUAL stands for Evaluation Of Audio Quality. It's an objective measurement technique used to measure the quality of encoded/decoded audio files (very similiar to PEAQ). It acts in contrast to more the common place subjective testing methodology deployed using ABX and ABC/HR reference testing (frequently preferred by hydrogenaudio). It's part of the ITU-R recommendation BS.1387. Several tests have been performed using EAQUAL most notably using numerous AAC encoders to determine via a Pearson Correlation the linear relationship between human ratings and EAQUAL ratings on a given set of test samples. The results, however when using objective testing methodologies are still inconclusive and mostly only used by codec developers and researchers.
Testing Using EAQUAL
note: I couldn't find any information about how the test is actually performed (no surprise) seeing that it's not widly used as much. this section will be completed soon
External links:
- EAQUAL Sourcecode linux archive of c code used to implement EAQUAL provided by Gabrial Bouvigne.
- EAQUAL Tools zip compression archive of the utility used to perform EAQUAL tests provided by Rarewares.