VoiceProcessingIO - echo cancellation issues
VoiceProcessingIO - echo cancellation issues
- Subject: VoiceProcessingIO - echo cancellation issues
- From: Zachary Kulis <email@hidden>
- Date: Wed, 23 Jun 2010 13:14:10 -0400
Hi all,
I am trying to use the VoiceProcessingIO audio unit to perform acoustic
echo suppression for a VoIP chat client. I've noticed that the echo
cancellation in iPhone OS 3.X does not perform very well when the output
audio is connected to external speakers. I can hear that the VPIO unit
is performing *some* echo cancellation, but the suppression is not very
good.
I was wondering if anyone else has tried using the VPIO to perform echo
cancellation (using external speakers), and whether the results were
satisfactory. Also, iOS4 introduces a new quality parameter for the
VPIO; could anyone shed some light onto what this parameter actually does?
Thanks,
Zach
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