EFR Speech Codec (Slide 2)
SIlence Descriptor (SID) frame
- SID frame is detected by a SID codeword comprising 95 bits which are all set to “1”
- 3GPP TS 46.062 “Comfort Noise Aspects for Enhanced Full Rate (EFR) Speech Traffic Channels”
- Not the same as the AMR speech codec SID frame
- 3GPP TS 26.092 “AMR Speech Codec; Comfort Noise Aspects”
- 35 bits (plus 4 framing information bits)