RECOMMENDATION ITU-R BS.1387-1 - Method for objective measurements of perceived audio quality

The ITU Radiocommunication Assembly, considering a) that conventional objective methods (e.g. for measuring signal-to-noise ratio and distortion) are no longer adequate for measuring the perceived audio quality of systems which use low bit-rate coding schemes or which employ analogue or digital signal processing; b) that low bit-rate coding schemes are rapidly being deployed; c) that not all implementations conforming to a specification or standard guarantee the best quality achievable with that specification or standard; d) that formal subjective assessment methods are not suitable for continuous monitoring of audio quality, e.g. under operational conditions; e) that objective measurement of perceived audio quality may eventually complement or supersede conventional objective test methods in all areas of measurement; f) that objective measurement of perceived audio quality may usefully complement subjective assessment methods; g) that, for some applications, a method which can be implemented in real time is necessary, recommends 1 that for each application listed in Annex 1 the method given in Annex 2 be used for objective measurement of perceived audio quality.