| 摘要 |
<p>A method of processing digital information of a radio data signal which is transmitted in a radio broadcasting signal with reference to at least first and second program identification codes of first and second program signals, respectively, and to a plurality of alternative frequencies per program identification code, said alternative frequencies being stored in first and second frequency lists allocated to the first and second program identification codes, and receiver for performing this method. In order to prevent the tuning from being changed over to unwanted transmitters such as, for example pirate transmitters, a frequency pair is formed from at least one alternative frequency in the first frequency list and an alternative frequency in the second frequency list, if the transmitters to which the two alternative frequencies relate have a substantially mutually equal transmitter location and transmitter range, while the reception quality of the RF radio broadcasting signal of each transmitter of the frequency pair is measured and compared with a quality criterion and a flag signal is generated and applied to a flag signal processing unit if the reception quality of each one of the two alternative frequencies satisfies the quality criterion.</p> |
