3 Definitions, symbols and abbreviations

26.4473GPPCodec for Enhanced Voice Services (EVS)Error concealment of lost packetsRelease 17TS

3.1 Definitions

For the purposes of the present document, the terms and definitions given in TR 21.905 [1] and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905 [1].

Further EVS codec specific definitions are found in clause 3.1 of [5].

3.2 Symbols

For the purposes of the present document, the following symbols apply:

EVS codec specific symbol definitions may be found in clause 3.2 of [5].

3.3 Abbreviations

For the purposes of the present document, the abbreviations given in TR 21.905 [1] and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905 [1].

AMR Adaptive Multi Rate (codec)

AMR-NB Adaptive Multi Rate Narrowband (codec) = AMR

AMR-WB Adaptive Multi Rate Wideband (codec)

EFR Enhanced Full Rate (codec)

EVS Enhanced Voice Services

FB Fullband

FR (GSM) Full Rate (codec)

HR (GSM) Half Rate (codec)

JBM Jitter Buffer Management

MTSI Multimedia Telephony Service for IMS

NB Narrowband

PLC Packet Loss Concealment

PS Packet Switched

PSTN Public Switched Telephone Network

SWB Super Wideband

WB Wideband

Further EVS codec specific abbreviations may be found in clause 3.3 of [5].