Siemens Aktiengesellschaft

Maximillian Walter

Herbert Barthel

Edgar Sigwart

Wolfgang Schmauss

A computer program product, an apparatus, a functionally safe programmable controller and a method for processing data, wherein an uncoded real number x is converted into a logarithmic number system (LNS) coded integer xvia a predetermined conversion rule for a logarithmic number system (LNS) in accordance with the relationship: x=sgn(x)&#xb7;2+Id|x|&#xb7;2, where sgn(x) denotes a sign function of the uncoded real number x, Id|x| denotes a binary logarithm of the uncoded real number x, m denotes a first exponent and n denotes a second exponent, and the LNS-coded integer xis coded into an arithmetically coded integer xvia arithmetic coding such that the required integer operations is reduced.

Method and apparatus for processing data

A method for detecting errors in a transfer of data from a transmitter to at least one receiver includes coding the data together with address information identifying the receiver in a series of data packets and transferring the data and the address information using the data packets. The method also includes generating, at the transmitter, a check value for each data packet and transferring the check value with/in the data packet to the receiver. The method further includes comparing, at the receiver, the check value with an expectation value, wherein an error is detected in the event of a deviation. For each data packet to be transmitted, the method includes calculating a number sequence value from the address information using a first calculation rule, generating the check value from the sequence value using a second calculation rule and transmitting the data packet with the check value to the receiver.

Growing community of inventors

Nuremberg, Germany

Maximillian Walter