2 ms·
> seems to 'know' immediately that she was inadvertently awoken. the 'listening' tone and 'end listening' tones sound in quick succession Speculation: - To re
by 01HNNWZ0MV43FF 2y ago
> seems to 'know' immediately that she was inadvertently awoken. the 'listening' tone and 'end listening' tones sound in quick succession
Speculation:
- To reduce latency, the "listening" tone plays as soon as the wake word chip hears the wake word
- To improve accuracy, the wake word chip keeps a circular buffer of the last couple seconds of audio, and the main CPU / DSP scans that when it wakes up
So you get spurious wakeups exactly the same as a human - You think you hear something, then you re-listen to it in your mind and realize it was something else.
- pklack 2y agoI remember an explanation by some Google employee a while back for the Google Home that was basically this, but a layer further removed. Basically the activation causes audio to start getting streamed to the cloud backend. That runs some more thorough checks on the activation ( like checking for massively concurrent activation with the same audio, etc...) and tells the device to stop and disregard the current activation.