6 ms·

What does that mean? Sent image files where? How did those image files impact car radios?

jlack 5y ago
HD radio can broadcast images for the radio station, etc. that is displayed when you are tuned to that channel.
tcskeptic 5y ago
I suspect they are talking about this: https://radiodns.org/wp-content/uploads/2018/02/Guidelines-on-Provision-of-Station-Logos-to-Automotive-Receivers-February-2018.pdf https://radiodns.org/wp-content/uploads/2018/02/Guidelines-o... Essentially small images sent OTA that allow stations to "Brand" themselves on automotive receivers.
- dmix 5y ago
  So a bug in the HD Radio app which has some very poor process architecture/sandboxing if it can take over the whole interface.
  - dymk 5y ago
    Good concept for a Black Mirror episode
    - benbristow 5y ago
      Go go gadgetmobile https://static.wikia.nocookie.net/disney/images/8/8e/Gadgetmobile_dashboard.jpg/revision/latest/scale-to-width-down/854?cb=20180417011428 https://static.wikia.nocookie.net/disney/images/8/8e/Gadgetm...
- patja 5y ago
  I think they can also do useful things like traffic maps and album art over nrsc5
  - rbanffy 5y ago
    And buffer overflows and RCE as well, I assume ;-)
    - kevincox 5y ago
      Maybe they could use an RCE to patch the firmware.
      - rbanffy 5y ago
        Eventually some Mazda owner will get frustrated enough to actually do that.
  - adolph 5y ago
    Goatse other people's radios is a terrible idea. Advanced data services provide broadcasters with the ability to transmit information that may be unrelated to MPS, SIS or SPS. These services can carry any form and content that can be expressed as a data file or a data stream, including audio services. Examples of such services include (i) visual effects associated with MPS, SIS, or SPS services; (ii) multimedia presentations of stock, news, weather, and entertainment programming including audio, text and images; (iii) broadcast updates to in-vehicle systems; (iv) local storage of content for time shifting and later replay; (v) targeted advertising; (vi) traffic updates and information for use with navigation systems; and (vii) subscription or free-but-limited-access services using conditional access. https://www.nrscstandards.org/standards-and-guidelines/documents/standards/nrsc-5-d/nrsc-5-d.pdf https://www.nrscstandards.org/standards-and-guidelines/docum... SDR Receiver: https://github.com/theori-io/nrsc5 https://github.com/theori-io/nrsc5
    - sizzle 5y ago
      Wow goatse, now that’s something I haven’t heard in about a decade. For the curious, I wouldn’t google the image, not trying to be asshole…
      - 5y ago
dgrin91 5y ago
How does a radio station even send an image file? What does that mean? What is suppose to happen when a radio station sends an image file?
- stuff4ben 5y ago
  HD radio is a lot more advanced than the old AM/FM stuff you may be used to.
- koz1000 5y ago
  In newer cars with video displays and HD Radio capability, the screen can show a small image next to the song information. It's typically album cover art for the song that is playing, but a lot of stations just put their station logo up and keep it there. https://blogmedia.dealerfire.com/wp-content/uploads/sites/561/2016/05/2014-mazda3-radio-hd-1024x570.png https://blogmedia.dealerfire.com/wp-content/uploads/sites/56... Satellite radio had this capability very early, and HD Radio seems to want to keep up with that. The data itself is sent on a sideband data channel that rides along with the traditional FM channel. Lots of links to read up starting here: https://www.sigidwiki.com/wiki/HD_Radio_(FM) https://www.sigidwiki.com/wiki/HD_Radio_(FM) The signal specification can be read here: https://www.sigidwiki.com/images/f/f6/HD_Radio_FM.pdf https://www.sigidwiki.com/images/f/f6/HD_Radio_FM.pdf
  - ThinkingGuy 5y ago
    It's also possible to decode this data with an RTL-SDR receiver: https://www.rtl-sdr.com/displaying-live-weather-and-traffic-data-from-hd-radio-nrsc-5-signals/ https://www.rtl-sdr.com/displaying-live-weather-and-traffic-...
    - koz1000 5y ago
      What's interesting is that this traffic map is also loaded on Mazda cars, but shown in a different application. Somehow the system searches for a HDRadio signal in the background to update this map from an independent receiver. I've had AM radio on for long periods and then load this app, and the traffic map is up to date. I've also driven to a different city and the map is now showing the new city.
Humdeee 5y ago
I imagine this could be anything like song album art, station icon, etc. for any car that has more than the scrolling led type radio display
wfleming 5y ago
I don't know the technical details of how it's encoded, but digital radio stations can embed metadata in their signal that the car radio can display. That includes text, like the station name, and also images, like a logo, that's usually shown next to the station name. I believe it's part of HD Radio: https://en.wikipedia.org/wiki/HD_Radio https://en.wikipedia.org/wiki/HD_Radio.

HD radio can broadcast images for the radio station, etc. that is displayed when you are tuned to that channel.

I suspect they are talking about this: https://radiodns.org/wp-content/uploads/2018/02/Guidelines-on-Provision-of-Station-Logos-to-Automotive-Receivers-February-2018.pdf https://radiodns.org/wp-content/uploads/2018/02/Guidelines-o... Essentially small images sent OTA that allow stations to "Brand" themselves on automotive receivers.

dmix 5y ago
So a bug in the HD Radio app which has some very poor process architecture/sandboxing if it can take over the whole interface.
- dymk 5y ago
  Good concept for a Black Mirror episode
  - benbristow 5y ago
    Go go gadgetmobile https://static.wikia.nocookie.net/disney/images/8/8e/Gadgetmobile_dashboard.jpg/revision/latest/scale-to-width-down/854?cb=20180417011428 https://static.wikia.nocookie.net/disney/images/8/8e/Gadgetm...
patja 5y ago
I think they can also do useful things like traffic maps and album art over nrsc5
- rbanffy 5y ago
  And buffer overflows and RCE as well, I assume ;-)
  - kevincox 5y ago
    Maybe they could use an RCE to patch the firmware.
    - rbanffy 5y ago
      Eventually some Mazda owner will get frustrated enough to actually do that.
- adolph 5y ago
  Goatse other people's radios is a terrible idea. Advanced data services provide broadcasters with the ability to transmit information that may be unrelated to MPS, SIS or SPS. These services can carry any form and content that can be expressed as a data file or a data stream, including audio services. Examples of such services include (i) visual effects associated with MPS, SIS, or SPS services; (ii) multimedia presentations of stock, news, weather, and entertainment programming including audio, text and images; (iii) broadcast updates to in-vehicle systems; (iv) local storage of content for time shifting and later replay; (v) targeted advertising; (vi) traffic updates and information for use with navigation systems; and (vii) subscription or free-but-limited-access services using conditional access. https://www.nrscstandards.org/standards-and-guidelines/documents/standards/nrsc-5-d/nrsc-5-d.pdf https://www.nrscstandards.org/standards-and-guidelines/docum... SDR Receiver: https://github.com/theori-io/nrsc5 https://github.com/theori-io/nrsc5
  - sizzle 5y ago
    Wow goatse, now that’s something I haven’t heard in about a decade. For the curious, I wouldn’t google the image, not trying to be asshole…
    - 5y ago

dgrin91 5y ago

How does a radio station even send an image file? What does that mean? What is suppose to happen when a radio station sends an image file?

stuff4ben 5y ago
HD radio is a lot more advanced than the old AM/FM stuff you may be used to.
koz1000 5y ago
In newer cars with video displays and HD Radio capability, the screen can show a small image next to the song information. It's typically album cover art for the song that is playing, but a lot of stations just put their station logo up and keep it there. https://blogmedia.dealerfire.com/wp-content/uploads/sites/561/2016/05/2014-mazda3-radio-hd-1024x570.png https://blogmedia.dealerfire.com/wp-content/uploads/sites/56... Satellite radio had this capability very early, and HD Radio seems to want to keep up with that. The data itself is sent on a sideband data channel that rides along with the traditional FM channel. Lots of links to read up starting here: https://www.sigidwiki.com/wiki/HD_Radio_(FM) https://www.sigidwiki.com/wiki/HD_Radio_(FM) The signal specification can be read here: https://www.sigidwiki.com/images/f/f6/HD_Radio_FM.pdf https://www.sigidwiki.com/images/f/f6/HD_Radio_FM.pdf
- ThinkingGuy 5y ago
  It's also possible to decode this data with an RTL-SDR receiver: https://www.rtl-sdr.com/displaying-live-weather-and-traffic-data-from-hd-radio-nrsc-5-signals/ https://www.rtl-sdr.com/displaying-live-weather-and-traffic-...
  - koz1000 5y ago
    What's interesting is that this traffic map is also loaded on Mazda cars, but shown in a different application. Somehow the system searches for a HDRadio signal in the background to update this map from an independent receiver. I've had AM radio on for long periods and then load this app, and the traffic map is up to date. I've also driven to a different city and the map is now showing the new city.

Humdeee 5y ago

I imagine this could be anything like song album art, station icon, etc. for any car that has more than the scrolling led type radio display

wfleming 5y ago

I don't know the technical details of how it's encoded, but digital radio stations can embed metadata in their signal that the car radio can display. That includes text, like the station name, and also images, like a logo, that's usually shown next to the station name. I believe it's part of HD Radio: https://en.wikipedia.org/wiki/HD_Radio https://en.wikipedia.org/wiki/HD_Radio.