Signal-processing device for a rotation-measuring apparatus, preferably for a vehicle, which rotation-measuring apparatus has a rotation-measuring sensor and a rotary measuring body, wherein the rotary measuring body comprises a feature quantity of measurement features, wherein - the signal-processing device is configured to provide temporally successive message sequences, and - a message sequence comprises a message quantity of successive messages, such that - temporally successive messages are assigned in temporal succession to spatially adjacent measurement features, wherein the measurement features interact with the rotation-measuring sensor, and each message is provided in a message type (NT, C, T, P) selected from a predetermined quantity of message types, and - a message arranged at a selection position of the message sequence is a message of a predetermined type, which describes a feature property of the assigned measurement feature, wherein - the successive message sequences comprise a first and a second message sequence (110.1, 110.2), - the signal-processing device is configured to select the selection position for the message sequence such that - for the first message sequence (110.1), a first selection position for a first message of a predetermined type (123.1) is provided, and for the second message sequence (110.2), a second selection position for a second message of the same predetermined type (123.2) is provided, characterized in that the signal-processing device further comprises: - a coding unit which is configured to encode and/or decode index information and/or useful information, wherein - the coding is carried out by the arrangement of at least one message of a predetermined type, preferably a temperature message, at a sequence position in a message sequence. - the signal-processing device is configured to provide temporally successive message sequences, and - a message sequence comprises a message quantity of successive messages, such that - temporally successive messages are assigned in temporal succession to spatially adjacent measurement features, wherein the measurement features interact with the rotation-measuring sensor, and each message is provided in a message type (NT, C, T, P) selected from a predetermined quantity of message types, and - a message arranged at a selection position of the message sequence is a message of a predetermined type, which describes a feature property of the assigned measurement feature, - the successive message sequences comprise a first and a second message sequence (110.1, 110.2), - the signal-processing device is configured to select the selection position for the message sequence such that - for the first message sequence (110.1), a first selection position for a first message of a predetermined type (123.1) is provided, and for the second message sequence (110.2), a second selection position for a second message of the same predetermined type (123.2) is provided, - a coding unit which is configured to encode and/or decode index information and/or useful information, wherein - the coding is carried out by the arrangement of at least one message of a predetermined type, preferably a temperature message, at a sequence position in a message sequence.