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Discussion Groups | Speech Coding | GSM EFR Vs GSM AMR
Technical discussions related to Speech Coding (all itu and other vocoders, ACELP, CELP, AMR, etc)
GSM EFR Vs GSM AMR - Author Unknown - Feb 28 1:23:00 2001
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Nice to have found an interesting site to discuss speech coding stuff. On the first look it looks like GSM AMR and GSM EFR have lot of commonolity. Standard says GSM AMR at rate 12.2k behaves exactly like GSM EFR. So it looks like GSM EFR is subset of GSM AMR. Can anybody implemented (familiar with) this verify please ? Following are my few queries. 1. Can we encode using GSM AMR at rate 12.2k and decode using GSM EFR codec or vice versa ? 2. Are the companies/services interested on having both GSM EFR as well as GSM AMR ? They might want to support GSM EFR for historical reasons, but the new guys in the field might want to jump to GSM AMR directly. Is that the case ? Thanks in Advance Prasanna S |
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