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How Google's Pixel 2 'Now Playing' Song Identification Works (venturebeat.com)
An anonymous reader shares a report from VentureBeat, written by Emil Protalinski: The most interesting Google Pixel 2 and Pixel 2 XL feature, to me, is Now Playing. If you've ever used Shazam or SoundHound, you probably understand the basics: The app uses your device's microphone to capture an audio sample and creates an acoustic fingerprint to compare against a central song database. If a match is found, information such as the song title and artist are sent back to the user. Now Playing achieves this with two important differentiators. First, Now Playing detects songs automatically without you explicitly asking -- the feature works when your phone is locked and the information is displayed on the Pixel 2's lock screen (you'll eventually be able to ask Google Assistant what's currently playing, but not yet). Secondly, it's an on-device and local feature: Now Playing functions completely offline (we tested this, and indeed it works with mobile data and Wi-Fi turned off). No audio is ever sent to Google.
Although I think you're being funny, no, this couldn't be used in that way. Noise cancelling headphones work by using destructive interference, which requires an exact opposite waveform of the sound being cancelled out. Since the analog waveform of the music would be affected by any number of factors (the quality of the speakers playing it, the equalizer settings of their audio equipment, the bitrate of their source, the echoing of the sound off various objects, multiple speakers playing the audio, which would result in multiple "copies" of the music reaching your ear just very slightly delayed from one another, etc, etc), you couldn't use a "canned" waveform (the original MP3) to cancel out the actual waveform reaching your ears.
Now, while it might be possible, using AI, to try to do a best match of the ambient sound against a canned waveform, and cancel out only the ambient sound that seems to match, it still would not work perfectly. That would result in echos and certain portions of the frequency spectrum still being heard, which would sound very strange.
Better known as 318230.
No audio is ever sent to Google.
No. But the playlist along with location data probably is. Either in real time or forwarded when the network becomes available.
And then this is turned over to ASCAP/BMI to verify that commercial establishments you were in have paid their fees.
Have gnu, will travel.
32 thousand CDs, using slim jewel cases at 5mm thickness, means you have a CD tower 160 metres tall. Given a standard height of three metres per floor, your CD stack is over 53 stories high.
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