[MeeGo-ivi] Early video <2sec + Security
nasa01 at comcast.net
Wed Mar 23 17:35:12 PDT 2011
For those of us *hobbiest* I have actually installed one of
these rearview cameras (it was really easy). In a lot of
case monitors/headunits have a line for a rear cameras and
multiple video input lines.
So steps go something like this
1. line to monitor rear camera wire is tied into the
reverse light power line.
2. camera video is feed into monitor 2nd line
3. *this part varies* power is provided to the camera via
the reverse light power line or some constant power
4. when car is placed in reverse the camera line now has
current which causes it to switch sources...
You have a reverse camera. If you provide constant power,
then the user can use a remote to switch sources whenever
BTW: This hardware solution can meet said requirements
----- "Kevron Rees" <kevron_m_rees at linux.intel.com> wrote:
> On Wed, 2011-03-23 at 23:29 +0000, Counihan, Tom wrote:
> > Hi Pavel,
> > One item on: http://wiki.meego.com/In-vehicle/Roadmap/FeatureScope
> > "6.After power-on, the head unit displays the rear view camera
> output within max. 2 s."
> > Is worth talking about.
> > So, I understand this to be a pending regulatory requirement soon,
> if not already.
> > My question is, and I think this may be a little rhetorical, is this
> from cold boot?
> > My fear is this may be challenging to meet.
> > Without security in mind, perhaps possible.
> > But when we add trusted boot to the mix, and trusted chain of
> command through the stack, I think 2sec is going to be difficult.
> > I think we need to handle security in this use case - consider the
> scenario where you cannot trust the actual rear view display you are
> being presented? I think the requirement above would need to be
> augmented to cater for integrity of what is being displayed..
> > We're enabling IP access going forward in all sorts of manor, plus
> the amount of additional interface to the vehicle is expanding rapidly
> too, so our security risk is exponentially larger than it is for
> vehicles on the road today.
> > So, back to cold boot.
> > From what I hear, certain OEM's may have taken engineering liberty
> by starting the boot cycle on activation or proximity of the key fob.
> > Can you confirm if you have heard similar, and more importantly, is
> this a possible route to bring a stack up before someone enters the
> car? Only activating the display for example on insertion of the key
> into the ignition?
> Sometimes rear view camera is just another video input on the head
> unit's screen. In this case, cold boot time would be irrelevant.
> like the camera would be triggered by either a CAN bus (or other
> message triggered when you put the car in reverse and not by power
> There are advantages of piping the rear view camera through software
> though (face recognition/detection comes to mind).
> If the head unit is on most if not all of the time though (*cough*
> power device), cold boot becomes even less of an issue. Proximity
> triggered boot can be used in cases when the head unit does turn off.
> my two sense...
> > Have you guys discussed security and can you share thoughts here?
> > Warm Regards
> > Tom.
> > --------------------------------------------------------------
> > Intel Shannon Limited
> > Registered in Ireland
> > Registered Office: Collinstown Industrial Park, Leixlip, County
> > Registered Number: 308263
> > Business address: Dromore House, East Park, Shannon, Co. Clare
> > This e-mail and any attachments may contain confidential material
> for the sole use of the intended recipient(s). Any review or
> distribution by others is strictly prohibited. If you are not the
> intended recipient, please contact the sender and delete all copies.
> > _______________________________________________
> > MeeGo-ivi mailing list
> > MeeGo-ivi at lists.meego.com
> > http://lists.meego.com/listinfo/meego-ivi
> MeeGo-ivi mailing list
> MeeGo-ivi at lists.meego.com
More information about the MeeGo-ivi