3 Definitions and abbreviations

06.913GPPSubstitution and muting of lost frames for AMR speech traffic channelsTS

3.1 Definitions

For the purposes of the present document, the following terms and definitions apply.

N-point median operation: Consists of sorting the N elements belonging to the set for which the median operation is to be performed in an ascending order according to their values, and selecting the (int (N/2) + 1) -the largest value of the sorted set as the median value.

Further definitions of terms used in the present document can be found in GSM 06.90 [2], GSM 06.93 [3], GSM 05.03 [1] and GSM 08.60 [4].

3.2 Abbreviations

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

BFI Bad Frame Indication from Radio Sub System

BSI_Abis Bad Sub-block Indication obtained from A-bis CRC checks

prevBFI Bad Frame Indication of previous frame

PDFI Potentially Degraded Frame Indication from RSS

RSS Radio Sub System

RX Receive

DTX Discontinuous Transmission

SID SIlence Descriptor frame (Background descriptor)

CRC Cyclic Redundancy Check

CCU Channel Coding Unit

ECU Error Concealment Unit

BFH Bad Frame Handling

medianN N-point median operation

TRAU Transcoding Rate Adaptation Unit