Re: Acoustic Echo Cancellation
On Wednesday 27 August 2008, Al Johnson wrote: > I assume you mean for GSM. I haven't heard anything about a roadmap > for it, but it had occurred to me as a possibility. The audio routing > looks possible - send the mic to the left ADC and the GSM output to > the right ADC to collect the signal, remove the echo from the mic > signal and send it out through one of the hifi DACs to the mono > output. The GSM output can carry on to the speaker, headset or > whatever as it does now. Ok, that's good to know. I read through the docs on the audio subsystem but I was not sure if processing the mic output before passing it to GSM would work. However, I read on the hardware mailing list that the TI Calypso (GSM chipset) has echo suppression features which seem to be unused (or not correctly configured) at the moment. I don't know if other GSM handsets implement echo cancellation or if echo suppression is sufficient. Does someone know how to modify the qtopia phoneserver to send custom AT commands before answering a call? Simply enabling echo suppression would be so much less work than implementing an AEC. Cheers, Florian -- DI Florian Hackenberger [EMAIL PROTECTED] www.hackenberger.at ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Acoustic Echo Cancellation
On Monday 25 August 2008, Florian Hackenberger wrote: > I'd like to know the development roadmap regarding an echo cancellation > module for the Neo. The speex AEC seems to be quite nice and may be > useful for a little copy and paste. Is someone from OM Inc. working on > the subject? I assume you mean for GSM. I haven't heard anything about a roadmap for it, but it had occurred to me as a possibility. The audio routing looks possible - send the mic to the left ADC and the GSM output to the right ADC to collect the signal, remove the echo from the mic signal and send it out through one of the hifi DACs to the mono output. The GSM output can carry on to the speaker, headset or whatever as it does now. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Acoustic Echo Cancellation
Hi! I'd like to know the development roadmap regarding an echo cancellation module for the Neo. The speex AEC seems to be quite nice and may be useful for a little copy and paste. Is someone from OM Inc. working on the subject? Cheers, Florian -- DI Florian Hackenberger [EMAIL PROTECTED] www.hackenberger.at ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
