Using a smaller BOM to make less boom

Don't know about you, but where I live, the price of gas has rocketed through the troposphere and is fast approaching the upper stratosphere. Which is to say, it has gone through the proverbial roof. It was almost $1.40 a liter (over $5 a gallon) the last time I stopped at a pump and is set to climb even higher, now that summer is approaching.

Small wonder that, for many car buyers, fuel economy is top of mind. Automakers are wise to this and have adopted a variety of measures to make their cars sip gas more slowly. For instance, many cars now deactivate cylinders when engine load is light and use fewer sound-damping materials to shed weight — because schlepping fewer pounds means less work, and less work means less gas.

These techniques save gas all right, but at a price: increased engine “boom” noise that can both annoy and fatigue the driver — not to mention everyone else in the vehicle. That's a problem. To address it, automakers use active noise control, or ANC, which plays noise-cancelling signals over speakers in the vehicle cabin. All fine and good, but until now, ANC solutions have used dedicated hardware, which can drive up Bill of Materials (BOM) costs and make it difficult to leverage the latest ANC technologies.

What to do? That's the subject of a recent whitepaper by my inestimable colleague Tina Jeffrey. Tina outlines some design considerations for ANC systems (choosing the right microphones makes a difference, for example) but mostly, she focuses on the advantages of running ANC logic on the processor or DSP of the car's infotainment system — as opposed to on a dedicated ANC module.

The benefits are many, including lower BOM costs, greater design flexibility, better cooperation between various acoustic functions in the car and — here's the one I like — less boom. But why sit there listening to me drone on about this? Download Tina's paper now and get the real deal.




Software-based ANC: a smaller BOM, with less boom.

Frankenstein and the future networked car

So what do Frankenstein and the future networked car have in common, you ask? Simple: both are compelling stories brought to life in Geneva, Switzerland.

In Mary Shelley’s Frankenstein the creature is seen climbing Mont-Salève after having fled Geneva during a lightning storm:

“I thought of pursuing the devil; but it would have been in vain, for another flash discovered him to me hanging among the rocks of the nearly perpendicular ascent of Mont-Salève.”

Mont-Salève, overlooking Geneva
Photo: Benoit Kornmann

Of course, the future networked car is a very different type of story, but compelling nonetheless. The laboratory in this story is the ITU Symposium on The Future Networked Car being held within the Geneva Auto Show on March 5 to 6, where many new ideas will be brought to life by convening leaders and technical experts from the automotive and ICT communities.

The event, organized by the International Telecommunications Union (ITU), will consist of high-level dialogues and several technical sessions; these include a session on integrating nomadic devices in cars, where I will discuss how technology standards can help minimize driver distraction. The dialogues will cover road safety and innovation for the future car, and will feature key leaders such as the presidents of Fédération Internationale de l’Automobile (Jean Todt) and Infiniti (Johan de Nysschen). The technical sessions will explore automated driving, connected car use cases, emergency services, and, of course, nomadic device integration. Speakers for these sessions come from a mix of automakers, tier one suppliers, ICT companies, standards development organizations (SDOs), industry groups, and government agencies.

The symposium also includes a session jointly organized by the ITU and UNECE Inland Transport Committee that deals with the human factors and regulatory issues introduced by automated driving. This session is an encouraging sign that the ITU and UNECE will continue the collaboration they started last June (see my previous post, “UN agencies take major step towards international standards for driver distraction”).

Hope to see you in Geneva!

QNX acoustics technology shortlisted for 2014 embedded AWARD

Okay, first things first. I didn't get the capitalization wrong. The name of the award really is spelled that way. I thought it odd at first, but I'm getting used to it. And besides, who am I to complain? After all, I spend a good part of my life promoting a product whose name is spelled all uppercase, and... where was I? Oh yes, the award!

Every year, the folks who organize the embedded world Exhibition&Conference hold the embedded AWARDs, which honor the most innovative software, hardware, and tools for embedded developers. And this year, the competition judges selected QNX Acoustics for Active Noise Control as a finalist in the software category.

If you aren’t familiar with our ANC solution, allow me to provide an overview — which will also help explain why the embedded AWARD judges are so impressed.

Automakers need to reduce fuel consumption. And to do that, they employ techniques such as variable engine displacement and operating the engine at lower RPM. These techniques may save gas, but they also result in "boom" noise that permeates the car's interior and can lead to driver distraction. And who needs more distraction?

QNX Acoustics for Active Noise Control can integrate 

seamlessly into a vehicle's infotainment system.

To reduce this noise, automakers use ANC, which plays “anti-noise” (sound proportional but inverted to the offending engine tones) over the car's speakers. The problem is, existing ANC systems require dedicated hardware, which adds design complexity, not to mention significant Bill of Materials costs. And who needs more costs?

Enter QNX Acoustics for ANC. Rather than use dedicated hardware, QNX ANC provides a software library that can run on the existing DSP or CPU of the car's head unit or audio system. This approach not only reduces hardware costs, also enables better performance, faster development, and more design flexibility. I could go on, but I will let my colleague Tina Jeffrey provide the full skinny.

Did I mention? This wouldn’t be the first time QNX Software Systems is tapped for an embedded AWARD. It has won two so far, in 2006 and 2004, for innovations in multi-core and power-management technology. It was also a finalist in 2010, for its persistent publish/subscribe messaging. Here's to making it a hat trick.

The QNX sound machine at CES

If you’ve ever had the pleasure of attending the Consumer Electronics Show, you’ll know that it’s a crowded place full of lights and noise. In the automotive North Hall, much of the cacophony comes from the legions of car customizers blasting bass from sedan-sized speakers. This year, QNX has brought a new kind of technology concept car to CES, based on a Kia Soul, that offers some subtler forms of sound artistry. (Sorry, hamster fans—I don’t think we’ll have your favorite mascot in the QNX booth.)


A sound ride: the new QNX technology concept car for acoustics

Let’s start with noise. Everyone likes a booming radio, sometimes. But if that’s the only tool you have to drown out engine noise you’ll go deaf. That’s where Active Noise Control (ANC) comes in. Think of ANC as a more sophisticated version of noise cancelling headphones that you don’t need to wear. Not only does ANC help keep the car’s cabin quiet, but the QNX solution is software based and doesn’t require a dedicated hardware module, saving the OEM and the consumer money.

The best part about ANC is that it helps cars become more fuel efficient. Huh? To keep car interiors quiet, automakers add baffling in the doors and under the floor to help mute engine noise. Dragging around that extra weight costs fuel. So removing the ballast (I mean baffles) lets the automakers make more fuel-efficient cars. And with ANC, which helps eliminate the extra noise caused by this approach, everyone wins.

Beyond wideband
Next up: a new level of call quality. If you’ve had the pleasure of conversing between two newer smartphones (BlackBerry Z10 or Z30, iPhone 5, Nokia Lumina 520, Samsung Galaxy S4, ...) you may have noticed that the call sounded better than what you’re used to. That’s because many newer phones support something called wideband audio (or HD Voice), which transmits more audible frequencies to make the call sound clearer. That’s good, but QNX wants to show what’s possible beyond wideband. So in the QNX technology concept car for acoustics, we’re demoing a new audio feature called full-band stereo calling, which is like having phone calls with CD quality audio. A full-band call has over six times the transmitted frequency range of a standard call, and more than double that of wideband. And as the name suggests, full-band stereo provides two independent channels, adding to the depth and sense of presence, making the call quality something that just has to be experienced.

Sound like a V8, sip like a Volt
Lastly — we get to pump up the volume! The technology concept car for acoustics also sports engine sound enhancement (ESE), which plays synthesized engine sounds over speakers inside the car. With ESE, your engine appears to sound a little more throaty. It may not be obvious, but this is also a fuel saving technology! As carmakers look for creative ways to turn gasoline slurpers into sippers, they’re implementing technologies that dynamically modify engine cylinder firing. Those changes can sometimes make a perfectly powerful engine sound anemic, which negatively impacts customer first impressions. Unfortunately, most people want a car that sounds and performs like it has a huge V8 even if they expect it to sip gas like a Chevy Volt. Both ANC and ESE can help the customer get over their performance anxiety. ESE also lets drivers get in tune with their engine, making it easier to shift by ear.

If you’re up for a little fun, you can also use ESE to make your car sound like something completely different. We’re playing the ESE audio outside the car as well as inside it. The Kia is using QNX ESE audio to masquerade as another car. Tweet us at @QNX_Auto if you can guess what it is!