Speech Coding pp 219-235 | Cite as

Quality Evaluation

  • Tom BäckströmEmail author
Part of the Signals and Communication Technology book series (SCT)


For evaluating the performance of speech codecs or their algorithms, we need metrics for quality. Since humans are the ultimate users of most speech codecs, subjective testing is the gold standard in quality measurement. In this chapter we present a range of typical subjective evaluation methods and discuss their strengths and weaknesses. Subjective evaluation requires in general plenty of work and time, whereby there exists a selection of automated objective evaluation methods, which simulate subjective measurements. Objective quality estimation methods therefore provide fast and reproducible measures of quality, even if their reliability can never reach that of extensive subjective measurements.


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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  1. 1.International Audio Laboratories Erlangen (AudioLabs)Friedrich-Alexander University Erlangen-Nürnberg (FAU)ErlangenGermany

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