Designed as a multimedia backbone for the transfer of infotainment data in the car, for almost ten years MOST (Media Oriented Systems Transport) technology has been successfully realized in vehicles. The challenge today is to keep pace with the development of the consumer industry and the needs of the consumers: The variety of entertainment applications is multiplying rapidly, and consumers are living a digital lifestyle, having their entertainment systems at hand everywhere, be it at home, in the office, or in the car.
As many people spend more and more time in the car, they naturally wish to just use all entertainment electronics in the car. But also, in parallel, car applications are growing constantly: Information and assistance functionality includes satellite navigation systems with traffic news, status updates of the car condition, distance control (active cruise control), cameras, lane changing systems, Car2X, and many more.
With MOST150, this technology not only fulfils all infotainment needs but goes one step further. MOST Technology expands to five major fields of in-car use cases, meeting the requirements not only for the traditional areas of entertainment and information, but also for the new domains of mobile connectivity, connected services, and driver assistance. MOST150 offers the technology and the audio/video capability for next generation automotive infotainment features and devices such as head units, rear seat entertainment, amplifiers, TV-tuners and video displays. In addition, it is ready for new features like Internet access devices, iPods, cameras, video processing units, and many more. At present, this latest MOST150 Technology is ready for implementation, with various car makers already working on first series projects.
MOST150 supports the extended functionality, from multimedia entertainment via personal mobile devices, to data transfer and driver assistance systems.
In current and future vehicles, driver assistance functions are starting to complete and extend the feature set of traditional infotainment systems. Along with information features such as navigation systems, traffic information, and function warnings, the number of vehicles with driver assistance features, including camera systems, distance control, or lane departure warning, will be rapidly increasing. With MOST150, automotive network technology is ready to take this essential step beyond infotainment. Necessary improvements are being investigated, and recent studies prove that MOST is able to support safety-critical applications and thus is ready to become a prime future network for driver assistance systems.
With its latest generation, MOST Technology is further optimized for multimedia applications. In addition to higher bandwidth for a data transfer rate of 150 MBit/s, MOST150 incorporates an isochronous transport mechanism to support complex video applications. This capability allows the transmission of audio and video signals with high bandwidth efficiency and without any overhead for addressing, collision recognition/reconstruction, or broadcast. Hence, in a MOST network, multiple high resolution video streams next to single definition (SD) video streams and multi-channel surround sound will be transmitted with high quality of service. Moreover, MOST150 offers isochronous channels to support streams that are not synchronous to the MOST frame rate.
Optimized for multimedia applications, MOST150, in addition to its higher bandwidth, includes an isochronous transport mechanism for the support of complex video applications,
A typical application scenario is the transport of MPEG streams via a MOST network, as generally MPEG streams use variable transfer rates. With the new MOST functionality, highly cost-effective realization of complex video applications is possible. The support of HD audio and video content from Blu-ray disc or HDTV is self-evident. Besides the quality, in particular the synchronicity of image and sound (i.e. lip sync) is highly important. When aligning image and sound, transmission via the synchronous MOST network is helpful, as the delay between image and sound is both minimal and constant. The MOST network itself does not add any noteworthy delay. The advantage: When running multiple displays in parallel, no means for synchronizing the different displays are necessary. With that, the way is paved for rear seat entertainment systems, digital sound amplifiers, TV tuners, video displays, and more entertainment via the MOST network.