Method and device for transmitting complementary data in an analog radio transmission system

A device for generating complementary data that are broadcast in an analog radio transmission system, the complementary data including information with respect to alternative transmitting frequencies of a respective program, comprising:

• a processing circuit configured to:
• convert SDC (service description channel) data into AMDS (amplitude modulation data system) data fields;
• ascertain check words, as a function of information included in the AMDS data fields, for detecting and correcting errors;
• and
• insert the ascertained check words into AMDS check fields;
• and
• a counter device that continuously consecutively numbers the AMDS groups, wherein the numbers are inserted into at least one AMDS data field that is reserved therefor.

A receiver for receiving and for reproducing radio transmission signals transmitted in an analog and in a digital manner, comprising:

• a processing circuit configured to:
• during reproduction of a radio transmission signal, that is transmitted in an analog manner, evaluate received complementary data that is transmitted in AMDS groups, with respect to alternative transmitting frequencies on which the same program is being transmitted digitally;
• and
• automatically switch over to the digitally transmitted alternative frequency, if alternative transmission frequencies, on which the same program is being transmitted digitally, are present;
• wherein the AMDS groups are continuously consecutively numbered using a counter.

A receiver for receiving and for reproducing radio transmission signals transmitted in an analog and in a digital manner, comprising:

• a processing circuit configured to:
• during reproduction of a radio transmission signal, that is transmitted in an analog manner, evaluate receiving complementary data that is transmitted in AMDS groups, with respect to alternative transmitting frequencies on which the same program is being transmitted digitally;
• and
• automatically switch over to the digitally transmitted alternative frequency, if alternative transmission frequencies, on which the same program is being transmitted digitally, are present;
• wherein a data bit of each AMDS group indicates whether the respective AMDS group is a first or a subsequent AMDS group of a plurality of AMDS groups that are transmitted one after the other, which together include information of an SDC (service description channel) block.

A device for generating complementary data that are broadcast in an analog radio transmission system, the complementary data including information with respect to alternative transmitting frequencies of a respective program, comprising:

• a processing circuit configured to:
• convert SDC (service description channel) data into AMDS (amplitude modulation data system) data fields of AMDS groups;
• ascertain check words, as a function of information included in the AMDS data fields, for detecting and correcting errors;
• and
• insert the ascertained check words into AMDS check fields;
• wherein a data bit of each AMDS group indicates whether the respective AMDS group is a first or a subsequent AMDS group of a plurality of AMDS groups that are transmitted one after the other, which together include information of an SDC block.