[asterisk-speech-rec] New Voice Activity / Barge-in Parameters foruse with LumenVox

[Ian]

Hi Steve

Thanks for the heads up on the new version.
Is it possible for lumenvox to do an upgrade guide.

I assume that as my installation is licenced I dont need to again ?

All I need to do is do a
yum install of the new licence server and engine then patch the new asterisk
bridge ?

is that  correct ?

Ian Plain



> -----Original Message-----
> From: asterisk-speech-rec-bounces at lists.digium.com
> [mailto:asterisk-speech-rec-bounces at lists.digium.com]On Behalf Of
> Stephen Keller
> Sent: Wednesday, August 01, 2007 9:02 PM
> To: Use of speech recognition in Asterisk
> Subject: [asterisk-speech-rec] New Voice Activity / Barge-in Parameters
> foruse with LumenVox
>
>
> As you probably heard if you're a LumenVox customer, we recently
> released a new version of our Speech Engine (the 7.5.600 release) that
> includes revamped voice activity detection (VAD) technology. VAD is what
> lets the Engine separate background noises from a caller's speech.
>
> The new VAD is significantly better than before. We tested it against a
> very noisy set of audio where the old Engine failed to correctly
> separate background noise from speech -- the new VAD correctly ignored
> the noise 92% of the time. Because background noise and false barge-in
> are significant problems for many users, we have seen these changes
> improve overall accuracy by several percentage points in some
> applications.
>
> As part of these changes, some of the VAD parameters in lumenvox.conf
> have changed with. Digium has just released b16 of
> res_speech_lumenvox.so (the Asterisk-LumenVox connector module) which
> supports these changes.
>
> We have added two new parameters to control barge-in sensitivity:
> vad_snr_sensitivity and vad_volume_sensitivity. Both are set on a scale
> of 1-100 and default to 50.
>
> vad_snr_sensitivity determines how much louder the speaker must be than
> the background noise in order to trigger barge-in. The smaller this
> value, the easier it will be to trigger barge-in.
>
> vad_volume_sensitivity is the volume required to trigger barge-in. The
> smaller the value, the more sensitive barge-in will be. This is
> primarily used to deal with poor echo cancellation. By setting this
> value higher (less sensitive) prompts that are not properly cancelled
> will be less likely to falsely cancel barge-in.
>
> We have removed vad_bargein_lvl and vad_noise_floor; if you attempt to
> set them using 7.5.600 or later nothing will happen.
>
> If you are a LumenVox user, we strongly recommend you upgrade to the
> 7.5.600 release of the Speech Engine and b16 of res_speech_lumenvox.
> These downloads are available from our Web site at
> http://www.lumenvox.com/customers/ by logging into your account and
> clicking "Your Software Downloads."
>
> You can find instructions on downloading and installing the software at
> http://help.lumenvox.com/?project=lvasterisk
>
> If you haven't upgraded in a while, be aware that res_speech (the
> generic Asterisk speech API) changed a few months ago, so if you're
> using an older version of Asterisk 1.4 or a precompiled version of 1.2
> (e.g. trixbox), you need to make sure you also have the latest version
> of res_speech.
>
> At this time, the 7.5 series is not supported on Asterisk Business
> Edition. We are working with Digium to get this updated, and I'll be
> sure to send a message to the list when this is the case.
>
> I'll be happy to answer any questions about this release.
>
> Stephen Keller
> LumenVox Support
> P: 877-977-0707, just say "Support"
> F: 858-707-7072
> Support at LumenVox.com
> www.LumenVox.com <http://www.lumenvox.com/>
>
>  <http://www.lumenvox.com/>
>
> Winner "Best Innovation in Speech Recognition"
> AVIOS SpeechTEK Award
>
>
>
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