2 References

26.0903GPPAdaptive Multi-Rate (AMR) speech codecMandatory speech CODEC speech processing functionsRelease 17Transcoding functionsTS

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[1] GSM 03.50: " Digital cellular telecommunications system (Phase 2+); Transmission planning aspects of the speech service in the GSM Public Land Mobile Network (PLMN) system".

[2] 3GPP TS 26.101 : "Frame Structure".

[3] 3GPP TS 26.094: "AMR Speech Codec; Voice Activity Detector".

[4] 3GPP TS 26.073: "Adaptive Multi-Rate (AMR); ANSI C source code".

[5] 3GPP TS 26.074: "Adaptive Multi-Rate (AMR); Test sequences".

[6] ITU‑T Recommendation G.711 (1988): "Pulse code modulation (PCM) of voice frequencies".

[7] ITU‑T Recommendation G.726: "40, 32, 24, 16 kbit/s Adaptive Differential Pulse Code Modulation (ADPCM)".

[8] ITU-T Recommendation G.712