RECOMMENDATION ITU-R BS.1534-1 - Method for the subjective assessment of intermediate quality level of coding systems

The ITU Radiocommunication Assembly, considering a) that Recommendations ITU-R BS.1116, ITU-R BS.1284, ITU-R BT.500, ITU-R BT.710 and ITU-R BT.811 as well as ITU-T Recommendations P.800, P.810 and P.830, have established methods for assessing subjective quality of audio, video and speech systems; b) that new kinds of delivery services such as streaming audio on the Internet or solid state players, digital satellite services, digital short and medium wave systems or mobile multimedia applications may operate at intermediate audio quality; c) that Recommendation ITU-R BS.1116 is intended for the assessment of small impairments and is not suitable for assessing systems with intermediate audio quality; d) that Recommendation ITU-R BS.1284 gives no absolute scoring for the assessment of intermediate audio quality; e) that ITU-T Recommendations P.800, P.810 and P.830 are focused on speech signals in a telephone environment and proved to be not sufficient for the evaluation of audio signals in a broadcasting environment; f) that the use of standardized subjective test methods is important for the exchange, compatibility and correct evaluation of the test data; g) that new multimedia services may require combined assessment of audio and video quality, recommends 1 that the testing and evaluation procedures given in Annex 1 of this Recommendation be used for the subjective assessment of intermediate audio quality.