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Virtual Dictionary

Voice Activity Detection

Voice activity detection or VAD, is typically a sub-process of speech recognition. It can of course be used in other ways as well. It functions as a result of analysis software hooked to a microphone, to detect when a human voice is being used. Not so much what is said, just the tonal parameters to indicate the presence or absence of voice.

Other than in speech recognition, this sub-process can be used as a crude input in its own right, or to trigger another process. Especially handy for those who have speech impediments or other difficulties that make full on speech recognition impossible, it acts as a timer, telling other, computation intensive processes such as brain scanning, when to activate.

Below, we offer a selection of links from our resource databases which may match this term.

Related Dictionary Entries for Voice Activity Detection:


Voice Activity Detection


Resources in our database matching the Term Voice Activity Detection:

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Locally Hosted resource
Vivox, Bringing Integrated Voice to Virtual Worlds
When it comes to voice, what is best is of course a voice module that can take a virtual voice as input just as well as a microphone - giving those without voices the same level of interaction as those with. That is what Vivox is working on, for Second Life and World of Warcraft.

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Virtual Voice: The Power of Online Communication: A Textual Voice
Textual communication, as exhibited by chat rooms, MUDs, graphic social VRs, and MMOs, is itself a form of voice, a virtual voice. There are many who cannot speak properly, through the many disabilities which can affect voice: ME which wastes muscles away; cerebral palsy, which limits fine motor control; Parkinsons, which plays with signals from the brain to the body, or simple paralysis.

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Virtual Voice: Ultimate RolePlaying Hook
In roleplaying, nothing breaks immersion more than hearing the voice of the player when its not appropriate for the role. The voice of a 10 year old girl coming from the troll about to smack you into next week, or a butch, and manly seductress just breaks immersion entirely. Either online roleplay should be limited to just text whilst everything else goes voice, or a new approach is required.

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Large Image Display: VTT's AR Sensor Web for Real-Time Road Ice Detection
A larger version of the system overview map from the VTT Technical Research Centre of Finland, demonstrating how their latest HGV-based modular real-time ice detection sensor web really functions.

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Linked resource
Voice Chat Can Really Kill the Mood on WoW
A commentary from Wired magazine on the advent of voice in the gameworld WoW, and how it is destroying the virtual identity ? physical identity threshold. Well balanced for both sides.

Linked resource
Neuropace: Neuro-blanker
A new neuroprosthetic on the market at the end of 2009, is an attempt to actually combiine a neural activity detector and a neurostimulator into one package. Traditionally this never worked because oncethe neurostimulator activates, it blocks out all underlying brain activity in the area - the implant is only reading itself. But, what if that is the desired outcome?

Locally Hosted resource
US Seeks Virtual Environment Based Car Bombers
The predictably over-paranoid US government has begun to take its spy networks into cyberspace, targeting virtual environments for terrorist-like activity. Project codename Reynard aims to recognise "normal" behaviour in online worlds and home in on "anomalous" activity.

Locally Hosted resource
Virtual Human? How about Virtual Voice?
Previously featured Industry News from September 2003, looking at the Vocaloid technology - the creation of virtual singers using voice fonts from previous artists.

Locally Hosted resource
Diagnosis Via Brain Music
In the video below, tunes are played via neuroprosthetics. What you are hearing, sounding eirie and mournful, is quite literally the sound of a healthy human brain working. Different areas were assigned to different notes, and the volume determined by the amount of activity. Areas with very low activity were filtered out entirely.


Industry News containing the Term Voice Activity Detection:

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A whole host of highly advanced speech technologies, including emotion and lie detection, are moving from the lab to the marketplace.

"This is not a new technology," says Daniel Hong, an analyst at Datamonitor who specialis...

Vocaloid, that's the name of a new technology, created to mimic singers voices with fine precision. Developed at the Spanish University Pompeu Fabra and under the care of Yamaha Corporation, the software, available for all by January, a...

Google helped loosened Apple's tight control over the iPhone a little today by launching Google Voice as a Web app for both the iPhone and Palm OS.

Google Voice provides a single phone number for multiple phones, provides lo...

Apple Inc. told federal regulators Friday that it blocked the Google Voice program from running on the iPhone because it alters important functions on the device - yet Apple denied that it has rejected Google's application outright.

Google has said it sees voice search as a major opportunity for the company in building a presence on the mobile web.

The company's vice president of engineering made the comments during a wide-ranging discussion at