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posted by Fnord666 on Friday February 23 2018, @08:26PM   Printer-friendly
from the here's-lookin-at-you-kid dept.

Arthur T Knackerbracket has found the following story:

The number of cameras in cars is increasing. However, through the flood of data the internal networks are being pushed to their limits. Special compression methods reduce the amount of video data, but exhibit a high degree of latency for coding. Fraunhofer researchers have adapted video compression in such a way that a latency is almost no longer perceivable. It is therefore of interest for use in road traffic or for autonomous driving. This technology will be on display at the Embedded World from 27 February until 1 March 2018 in Nuremberg in hall 4 (booth 4-470).

[...] The Fraunhofer HHI, for example, has made a decisive contribution to the development of the two video coding standards H.264/Advanced Video Coding (AVC) and H.265/MPEG High Efficiency Video Coding (HEVC). "With these methods, the data quantities can be sharply reduced. In this way, more than ten times the quantity of data can be transmitted," emphasizes the group leader of the "Video Coding and Machine Learning" department at the Fraunhofer HHI.

Normally, 30 to 60 images per second are sent from a camera to the vehicle's central computer. By compressing the image data, a small delay in transmission occurs, known as the latency. "Usually, this is five to six images per second," explains Stabernack. The reason for this is that the methods compare an image with those that have already been transmitted in order to determine the difference between the current image and its predecessors. The networks then only send the changes from image to image. This determination takes a certain amount of time.

"However, this loss of time can be of decisive importance in road traffic," says Stabernack. In order to avoid latency, the professor and his team only use special mechanisms of the H.264-coding method, whereby determining the differences in individual images no longer takes place between images, but within an image. This makes it a lowlatency method.

"With our method the delay is now less than one image per second, almost real time. We can therefore now also use the H.264 method for cameras in vehicles," is how Stabernack describes the additional value. The technology was implemented in the form of a special chip. In the camera it compresses the image data, and in the on-board computer it decodes them again.


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  • (Score: 0) by Anonymous Coward on Saturday February 24 2018, @03:59PM (1 child)

    by Anonymous Coward on Saturday February 24 2018, @03:59PM (#643051)

    How is that going to work in -30C temperatures with vibration as you drive? Just asking, cause i don't have any experience. Just sounds a bit fragile.

  • (Score: 1) by tftp on Saturday February 24 2018, @08:03PM

    by tftp (806) on Saturday February 24 2018, @08:03PM (#643149) Homepage
    Civilian and military aircraft are full of fiber. Vibrations are taken care of by plugs. You can have fiber even in armored jacket, good enough to roll up on a battlefield.