Burst failure

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A burst error (also known as a burst error ) occurs when, during data transmission , e.g. B. by scratches on a CD , a block-wise disturbance of the signal occurs. Due to this block ( burst ) it can happen that a whole sequence of bits of the transmitted data “flips”, i. H. no longer contain the information intended. One speaks clearly of error bundles .

Burst errors are encountered especially on CDs through interleaving , CRC or parity bits, in order to break down bundle errors into smaller packets. In addition, some coding methods, such as the Reed-Solomon code, are particularly suitable for detecting and correcting burst errors.

The cause of a burst error are, for example, switching operations that may cause a. can be heard as crackling on the radio when the light switch is pressed. The intensity and duration of the burst increases with slow switching and with inductive loads. In the household these are, for example, fluorescent lamps with conventional ballast or electric motors in household appliances.

The disruption of a digital message by a burst error involves numerous neighboring bits, not all of which are necessarily corrupted.

Transferred bit sequence: 

1001010101001010010100100101011010010110010010

Disturbed bit sequence (bold): 

1001010111101110000000100011101111111110010010

With EMC exams burst errors can be simulated. A description of the procedure for fault stimulation and the basic structure of burst generators can be found, for example, in the IEC 61000 series of standards, in the German version as DIN EN 61000 / VDE 0847 "Electromagnetic Compatibility (EMC)", Part 4-4 "Test and measurement procedures - testing the Interference immunity against fast transient electrical disturbances / burst ”available.

See also

literature

  • Thomas Görne: Sound engineering . Hearing - sound transducers - impulse response and convolution - digital signals - multi-channel technology - sound engineering practice, 4th edition, Hanser Verlag, Munich 2014, ISBN 3-446-44149-2 .
  • Ulrich Freyer: News transmission technology. Basics, components, processes and systems of telecommunications technology . 1st edition. Carl Hanser Verlag, Munich 2009, ISBN 978-3-446-41462-4 .
  • Günter Kemnitz: Test and reliability of computers . Springer Verlag, Berlin / Heidelberg 2007, ISBN 978-3-540-45963-7 .
  • Ulrich Freyer: Media technology . Basic knowledge of communications technology - terms - functions - applications, Hanser Verlag, Leipzig 2013, ISBN 978-3-446-42915-4 .

Individual evidence

  1. ↑ Ansgar Meroth, Boris Tolg " infotainment systems in motor vehicles ", first edition 2008, Friedr. Vieweg & Sohn Wiesbaden, ISBN 978-3-8348-0285-9 , section 5.12 "Storage of data in vehicles"

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