BS.1387: Difference between revisions

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'''EAQUAL''' stands for ''Evaluation Of Audio Quality''. It's an '''objective''' measurement technique used to measure the quality of encoded/decoded audio files. 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. 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.   
===Testing Using EAQUAL===
''note: I couldn't find any information about how the test is actually performed (no surprise). this section will be completed soon ''


===External links:===  
===External links:===  

Revision as of 10:35, 8 July 2005

EAQUAL stands for Evaluation Of Audio Quality. It's an objective measurement technique used to measure the quality of encoded/decoded audio files. 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 using objective testing methodologies are still inconclusive.

Testing Using EAQUAL

note: I couldn't find any information about how the test is actually performed (no surprise). 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.