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Content for  TR 46.085  Word version:  16.0.0

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1  ScopeWord‑p. 5

The present document 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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2  References

The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
  • References are either specific (identified by date of publication, edition number, version number, etc.) or non specific.
  • For a specific reference, subsequent revisions do not apply.
  • For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
[1]
GSM 01.04: "Digital cellular telecommunications system (Phase 2+); Abbreviations and acronyms".
[2]
GSM 06.01: "Digital cellular telecommunications system (Phase 2+); Full rate speech; Processing functions".
[3]
GSM 06.10: "Digital cellular telecommunications system (Phase 2+); Full rate speech; Transcoding".
[4]
GSM 06.11: "Digital cellular telecommunications system (Phase 2+); Full rate speech; Substitution and muting of lost frames for full rate speech channels".
[5]
GSM 06.12: "Digital cellular telecommunications system (Phase 2+); Full rate speech; Comfort noise aspect for full rate speech traffic channels".
[6]
GSM 06.31: "Digital cellular telecommunications system (Phase 2+); Full rate speech; Discontinuous Transmission (DTX) for full rate speech traffic channels".
[7]
GSM 06.32: "Digital cellular telecommunications system (Phase 2+); Voice Activity Detector (VAD)".
[8]
GSM 06.02: "Digital cellular telecommunications system (Phase 2+); Half rate speech; Half rate speech processing functions".
[9]
GSM 06.06: "Digital cellular telecommunications system (Phase 2+); Half rate speech; ANSI C code for the GSM half rate speech codec".
[10]
GSM 06.07: "Digital cellular telecommunications system (Phase 2+); Half rate speech; Test sequences for the GSM half rate speech codec".
[11]
GSM 06.08: "Digital cellular telecommunications system (Phase 2+); Half rate speech; Performance Characterization of the GSM half rate speech codec".
[12]
GSM 06.20: "Digital cellular telecommunications system (Phase 2+); Half rate speech; Half rate speech transcoding".
[13]
GSM 06.21: "Digital cellular telecommunications system (Phase 2+); Half rate speech; Substitution and muting of lost frame for half rate speech traffic channels".
[14]
GSM 06.22: "Digital cellular telecommunications system (Phase 2+); Half rate speech; Comfort noise aspects for half rate speech traffic channels".
[15]
GSM 06.41: "Digital cellular telecommunications system (Phase 2+); Half rate speech; Discontinuous Transmission (DTX) for half rate speech traffic channels".
[16]
GSM 06.42: "Digital cellular telecommunications system (Phase 2+); Half rate speech; Voice Activity Detector (VAD) for half rate speech traffic channels".
[17]
GSM 06.51: "Digital cellular telecommunications system (Phase 2+); Enhanced Full Rate (EFR) speech coding functions; General description".
[18]
GSM 06.53: "Digital cellular telecommunications system (Phase 2+); ANSI-C code for the GSM Enhanced Full Rate (EFR) speech codec".
[19]
GSM 06.54: "Digital cellular telecommunications system (Phase 2+); Test sequences for the GSM Enhanced Full Rate (EFR) speech codec".
[20]
GSM 06.55: "Digital cellular telecommunications system (Phase 2+); Performance Characterization of the GSM Enhanced Full Rate (EFR) speech codec".
[21]
GSM 06.60: "Digital cellular telecommunications system (Phase 2+); Enhanced Full Rate (EFR) speech transcoding".
[22]
GSM 06.61: "Digital cellular telecommunications system (Phase 2+); Substitution and muting of lost frames for Enhanced Full Rate (EFR) speech traffic channels".
[23]
GSM 06.62: "Digital cellular telecommunications system (Phase 2+); Comfort noise aspects for Enhanced Full Rate (EFR) speech traffic channels".
[24]
GSM 06.81: "Digital cellular telecommunications system (Phase 2+); Discontinuous Transmission (DTX) for Enhanced Full Rate (EFR) speech traffic channels".
[25]
GSM 06.82: "Digital cellular telecommunications system (Phase 2+); Voice Activity Detection (VAD) for Enhanced Full Rate (EFR) speech traffic channels".
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3  Definitions and abbreviationsWord‑p. 6

3.1  Definitions

Definition of terms used in the present document can be found in GSM 06 Series.

3.2  Abbreviations

For the purpose of the present document, the following abbreviations apply:
BFH
Bad Frame Handling
BFI
Bad Frame Indicator
CCITT
Comité Consultatif du Téléphone et du Télégraphe
CODEC
enCOder + DECoder
DL
Down-Link
DT
Deutsch Telekom
EFR
Enhanced Full Rate
EID
Error Insertion Device
EP
Error Pattern
ETS
European Telecommunication Standard
ETSI
European Telecommunication Standardization Institute
FR
Full Rate
FTP
File Transfer Protocol
GSM
Global System for Mobile communications
HR
Half-Rate
IRS
Intermediate Reference System
ITU
International telecommunication Union
LAN
Local Area Network
M-IRS
Modified Intermediate Reference System
PCM
Pulse Coded Modulation
MNRU
Modulated Noise reference Unit
SEG
Speech Expert Group
SMG
Special Mobile Group
STL
Software Tool Library
TFO
Tandem Free Operation
TR
Technical Report
UFI
Unreliable Frame Indicator
UIT
Union Internationale des Télécommunications
UL
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For abbreviations not given in this subclause, see GSM 01.04 (ETR 350) [1].
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4  GeneralWord‑p. 7

Clause 5 describes the testing methodologies adopted for the internationally co-ordinated subjective evaluation of the interoperability HR-FR-EFR.
Clause 6 describes the tools and procedures used by the host laboratory to produce the processed speech material (speech was added with environmental noise, when requested by the experimental design).
Clause 7 describes the results obtained from the set of tests carried out by four laboratories.
Clause 8 describes the conclusions that can be drawn from the analysis of all data that were produced over the two main phases of testing.
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