[asterisk-bugs] [JIRA] (ASTERISK-26581) codec_opus: Poor quality MOH when using DTX or FEC

[Sam For (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-26581?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=240504#comment-240504 ] 

Sam For commented on ASTERISK-26581:
------------------------------------

Hi there, I've tried to reproduce this with:

Ubuntu 16.04
Asterisk 14.7.3
Opus-binary codec_opus-14.0_1.2.0-x86_64

The problem has gone away with these versions and is no longer reproducible.

> codec_opus: Poor quality MOH when using DTX or FEC
> --------------------------------------------------
>
>                 Key: ASTERISK-26581
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-26581
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Codecs/codec_opus
>    Affects Versions: 13.12.1
>         Environment: Ubuntu 14.04. Asterisk 13.12.1
>            Reporter: Sam For
>            Assignee: Sam For
>         Attachments: opus_dtx_fec10p.wav, opus_fec10p.wav, opus.wav
>
>
> If FEC with 10% packet loss OR DTX is enabled for Opus then MusicOnHold will sound extremely poor.
> Sounds recordings are attached to this ticket.
> These are the three codec settings that were tested:
> DTX & FEC at 10%
> [opus24]
> type=opus
> fec=yes
> packet_loss=10
> dtx=yes
> cbr=yes
> bitrate=24000
> complexity=8
> FEC at 10%
> [opus24]
> type=opus
> fec=yes
> packet_loss=10
> dtx=no
> cbr=yes
> bitrate=24000
> complexity=8
> DTX & FEC disabled
> [opus24]
> type=opus
> fec=no
> packet_loss=0
> dtx=no
> cbr=yes
> bitrate=24000
> complexity=8



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