PSQM (Perceptual Speech Quality Measurement)

A method, defined in ITU-T P.861, for objec-

tively evaluating voice transmission quality. PSQM is an automated method developed to measure the perceived quality of real-time voice as impacted by compression codecs. PSQM compares a distorted voice sample to an original, clear voice sample and uses a complex analytical process to evaluate the difference in terms of factors that influence the perceptions of human listeners.The ultimate distortion score corresponds closely with the mean opinion score (MOS) yielded by the panel of human listeners employed using the P.800 method. See also codec, compression, MOS, P.800, and PSQM+.

• speckle noise
• speckling
• spectral efficiency
• spectral width
• spectrum
• spectrum allocation
• spectrum management
• speech
• speech
• speech recognition
• speech recognition
• Speech-to-Speech (STS)
• speech-to-text
• speed of light
• SPE (Synchronous Payload Envelope)
• SPID (Service Profile IDentification)
• spike
• spim or SPIM (SPam over Instant Messaging)
• splice
• splice case
• splice tray
• splitter
• splitterless ADSL (splitterless Asymmetric Digital Subscriber Line Lite)
• sponsored domain
• spoofing