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neels has posted comments on this change. ( 
https://gerrit.osmocom.org/c/osmo-msc/+/30114 )

Change subject: add codec_mapping.h,c
......................................................................


Patch Set 4:

(2 comments)

File src/libmsc/codec_mapping.c:

https://gerrit.osmocom.org/c/osmo-msc/+/30114/comment/d7d9f3bd_1e78e937
PS1, Line 8:  * SPDX-License-Identifier: GPL-2.0+
> AGPL-3. […]
Done


https://gerrit.osmocom.org/c/osmo-msc/+/30114/comment/ecafb3bd_3a147881
PS1, Line 29: FIXME: I'm not sure about OFR, OHR -- O means octet-aligned??
> in any case, just to be clear: OFR/OHR are not supported in our stack so far.
just noting some half knowledge i came across;
Related: 3GPP TS 26.103
Mention in 3GPP TS 48.058 9.3.6 Channel Mode
and 3GPP TS 48.008 3.2.2.11 Channel Type

I wasn't aware yet of this relation:

GSM speech full rate version 1: GSM FR.
GSM speech full rate version 2: GSM EFR.
GSM speech full rate version 3: FR AMR.
GSM speech full rate version 4: OFR AMR-WB.
GSM speech full rate version 5: FR AMR-WB.
GSM speech half rate version 1: GSM HR.
GSM speech half rate version 2: not defined in this version of the protocol.
GSM speech half rate version 3: HR AMR.
GSM speech half rate version 4: OHR AMR-WB.
GSM speech half rate version 6: OHR AMR.

interesting how "half rate version 5" is skipped without a mention.



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Gerrit-Project: osmo-msc
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