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Reference.org
Perceptual Speech Quality Measure
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<p>Perceptual Speech Quality Measure (PSQM) is a computational and modeling algorithm defined in Recommendation <a href="/facts/ITU-T/9nJwkPYx">ITU-T</a> P.861 that objectively evaluates and quantifies voice quality of voice-band (300 – 3400 Hz) speech codecs. It may be used to rank the performance of these speech codecs with differing speech input levels, talkers, bit rates and transcodings. P.861 was withdrawn and replaced by Recommendation ITU-T P.862 (<a href="/facts/PESQ/sJcUPedc">PESQ</a>), which contains an improved speech assessment algorithm. </p>