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TR 06.85 (SA4)
Subjective tests on the interoperability of the HR/FR/EFR speech codecs – single, tandem and tandem free operation

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(P) GSM Rel-99 v8.0.0    2000/02    36 p.
(P) GSM Rel-98 v7.0.0    1998/06    36 p.
(P) GSM Rel-97 v6.0.0    1998/10    36 p.
(P) GSM Rel-96 v5.0.0    1998/06    35 p.

Rapporteur:  USAI, Paolino
Descendant:  TR 46.085    

This TR contains the results obtained from an internationally co-ordinated subjective evaluation conducted by four laboratories to estimate the performance in mobile-to-mobile connections of the GSM half, full, and enhanced full rate speech codecs (including the expected advantages of the Tandem Free Operation), in case of inter-operability in the digital cellular telecommunications system. These (listening-only) tests did not include the effects of Voice Activity Detector, Comfort Noise Insertion and the Discontinuous Transmission.


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