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Joined 1 year ago
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Cake day: June 20th, 2023

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  • Look up how HLS (HTTP Live Streaming) works. They just need to generate a personalized playlist for each person which points at things already hosted on CDN, and insert the ads where they want in the literal text file that your video player reads from to serve you the video.

    I don’t know much about it, but it looks like there’s specific tags designed for dynamic ad insertion. Idk if YouTube plans to use them in this case though, if they want it to be undetectable to the client.





  • The way that “Hey Alexa” or “Hey Google” works is by, like you said, constantly analysing the sounds they said. However, this is only analyzed locally for the specific phrase, and is stored in a circular buffer of a few seconds so it can keep your whole request in memory. If the phrase is not detected, the buffer is constantly overwritten, and nothing is sent to the server. If the phrase is detected, then the whole request is sent to the server where more advanced voice recognition can be done.

    You can very easily monitor the traffic from your smart speaker to see if this is true. So far I’ve seen no evidence that this is no longer the common practice, though I’ll admit to not reading the article, so maybe this has changed recently.