So, I thought this wasn't supported. My 2012 Four has the stock Display Audio w/ Nav & JBL. Used an iPod over USB until my iPhone 6 came along (v 8.1.1). Not wanting to plug in every morning, I've been using Bluetooth. First I was disappointed at losing the browse capability, and seeing generic artwork displayed (Jazz, R&B, Rock). Now that I've played more albums, I've found that artwork is displayed for many (not all) of the albums. The resolution is lower, and sometimes isn't the exact artwork from my music library. So, how is this working? Where is the system getting the artwork from? My understanding of the BT protocols, is that even the latest supports only artist, album, and track info.
I wonder if some of the more common album artwork is stored locally on the car? I have a 2011 Four, and I haven't seen this - but I use an iphone 5 with an older version of iOS. Cool find!
As you point out, there's no standard way to transmit album art over Bluetooth. (It's technically possible for a vendor to use a proprietary metadata field within AVRCP 1.4 and encode up to ~42 KB of album art as a metadata field. I don't think anyone is doing this today, though.) I suspect that the album art is coming from Gracenote's matching service, which would explain why it sometimes differs from your music library. Do you have your Prius set up for Internet access? (e.g. through phone tethering)
I have it paired for phone and audio over BT, but I don't have entune installed. Tethering in the phone is disabled (personal hotspot). Is there another method for tethering? FWIW, the displayed artwork is *much* lower resolution than when I use USB.
lucky! my prius 2013 Four, not IV as roman numerals were used for model year 2010, hatch with navi and solar roof -- does no such things.. actually want to just wait until wireless car play becomes a thing, and buy a 3rd party head unit that will fit.
If you use USB, it's using your iPod's artwork (At least that's my understand with my short experience with the 2014 Corolla with the same headunit as yours). Over BT Audio, it didn't display artwork for me (not even the generic "genre" artwork), so it's possible it's using Gracenotes over BT Audio.
