Nowadays, the numerous complex parameters that determine the speech quality of telecommunication equipment as well as the end-to-end speech quality can be interpreted by technical experts only. This Recommendation provides a novel quality representation methodology which is easy to use and also easy to understand for non-experts and which can serve as a basis for commercial decisions on a management or marketing level.
ITU-T P.505 SPANISH-2005 Referenced Document
ITU-T G.711-1988 PULSE CODE MODULATION (PCM) OF VOICE FREQUENCIES
ITU-T G.723.1-1996 Dual Rate Speech Coder for Multimedia Communications Transmitting at 5.3 and 6.3 kbit/s - General Aspects of Digital Transmission Systems (Study Group 15) 31 pp
ITU-T G.729-1996 Coding of Speech at 8 kbit/s Using Conjugate-Structure Algebraic-Code-Excited Linear-Prediction (CS-ACELP) - General Aspects of Digital Transmission Systems Study Group 15; 39 pp
ITU-T P.340-2000 Transmission Characteristics and Speech Quality Parameters of Hands-Free Terminals Series P: Telephone Transmission Quality Telephone Installations Local Line Networks Subscribers' Lines and Sets Study Group 12; Covering Note: March 31 2004
ITU-T P.501-2000 Test Signals for Use in Telephonometry - Series P: Telephone Transmission Quality@ Local Line Networks Objective Measuring Apparatus
ITU-T P.502-2000 Objective Test Methods for Speech Communication Systems Using Complex Test Signals Series P: Telephone Transmission Quality Telephone Installations Local Line Networks Objective Measuring Apparatus Study Group 12
ITU-T P.800.1-2003 Mean Opinion Score (MOS) terminology SERIES P: TELEPHONE TRANSMISSION QUALITY@ TELEPHONE INSTALLATIONS@ LOCAL LINE NETWORKS Methods for objective and subjective assessment of quality (Study Group 12)
ITU-T P.862-2001 Perceptual evaluation of speech quality (PESQ): An objective method for end-to-end speech quality assessment of narrow-band telephone networks and speech codecs--SERIES P: TELEPHONE TRANSMISSION QUALITY TELEPHONE INSTALLATIONS LOCAL LINE NETWORKS Methods