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How do they ‘detect’ the activation word without listening? Seems to me that is tautologically impossible. The definition of detect and listen are identical her
by cryptoz 4y ago
How do they ‘detect’ the activation word without listening? Seems to me that is tautologically impossible. The definition of detect and listen are identical here. How do you detect sound waves without listening to them?
- oneoff786 4y agoListening vs listening, transcribing, and sending home
- kennu 4y agoAmazon has a white paper on how it's supposed to work. According to the paper, yes, it's technically listening to audio, but storing it only in a temporary RAM buffer until it detects the wake word. I'm personally mostly interested in what gets recorded or sent to the cloud. "Echo devices use on-device keyword spotting designed to detect when a customer says the wake word. This technology inspects acoustic patterns in the room to detect when the wake word has been spoken using a short, on-device buffer that is continuously overwritten. This on-device buffer exists in temporary memory (RAM); audio is not recorded to any on-device storage. The device does not stream audio to the cloud until the wake word is detected or the action button on the device is pressed. If it does not detect the wake word or if the action button is not pressed, no audio is sent to the cloud." https://d1.awsstatic.com/product-marketing/A4B/White%20Paper%20-%20Alexa%20Privacy%20and%20Data%20Handling%20Overview.pdf https://d1.awsstatic.com/product-marketing/A4B/White%20Paper...
- deleted 4y ago[deleted]
- MichaelCollins 4y agoThey could easily push custom firmware to "persons of interest" (ever criticize your government?) and nobody would ever know.
- OriginalPenguin 4y agoYes. But that's also true of laptops, tablets, cell phones and lots of other items in our houses.
- jonathankoren 4y agoAnd that's why computers used in classified areas have their cameras and microphones physically disabled.
- gscott 4y agoThis has been done with cars with the inbuilt microphone for onstar.
- xarope 4y agoI'd imagine a similarly way to how car cameras work; they buffer for a few seconds, and if they detect a collision, they then save that buffer instead of discarding it.
- datpiff 4y agoUsually a triage system. A low-power voice detection might run on the unit itself, capable of detecting speech but not recognizing it. Another NN might be running on the device itself that can only categorize the activation words. Finally they wake the network interface and send all the data off to Amazon for a datacentre to run the inference.