High quality audio for low-power in-car portable applications
All this content is networked together and different people in the car can choose to listen to different audio sources, whether through the car's speakers or through headphones that enable individualized enjoyment of the various programs available.
Wireless audio has been around for some time. You can put on a headset without having to be physically tethered to the audio source. However, for portable applications, there has always been a challenge to find a solution that is both low power and can also transmit full CD-quality audio.
There are two options to transmit audio wirelessly: infrared and radio frequencies (RF). Infrared has heretofore been the most widely used due to low cost and high fidelity. However, is severely limited by line of sight issues since there can be no obstruction between the sender and the receiver. It is also susceptible to the heat of the sun on the dashboard. Any heat source can be a source of infrared interference. RF is more versatile. Some solutions operate on the FM band, but that limits their audio quality. Most higher quality solutions operate in what is called the Industrial, Scientific and Medical band (ISM band), because it is largely unregulated and doesn't require specific licensing. There are rules for how much power can be radiated, and the like, so there are some compliance requirements, but a provider does not need to apply for licenses to get spectrum allocated.
- No news
- Daimler introduces robot truck concept
- This is how the cockpit of the future might look like
- 100 yeas old: Traffic lights switch to smart mode
- Jaguar Land Rover concept uses entire windscreen as Head-up display
- Top ten automotive MEMS sensor vendors ranked
- Will laser ignition replace the venerable spark plug?
- Surfer triples Li-ion battery performance with sandy solution
- MIT, Fraunhofer research future mobility
- Head-up display integrates Augmented Reality
- Researchers devise high-capacity supercaps for cars
- Inductive charging takes shape at BMW and Daimler
- Takeover catapults Visteon into first league of automotive electronics
- XCore architecture attracts Bosch investment
- VW grabs Blackberry's European R&D lab
- Banning cellphones while driving does not decrease accidents, researchers find
- Supplying DC input power for HEV testing
- NSR Noise Suppressors: Wirewound Resistors
- Virtual Hardware “In-the-Loop”: Earlier Testing for Automotive Applications
- Open Standards and Product Differentiation
- Camera Solutions with Micrel Power Management and Networking
- Deterministic Real-Time Ethernet Platform