Abstract: Method for controlling radio transmission of audio data, wherein audio data from an audio player device is FM-modulated and transmitted to be received by an RDS capable FM radio receiver, comprising selecting at least one frequency, transmitting said selected frequency as Alternate Frequency of the RDS system to be received by said RDS capable FM radio receiver, receiving an input and responsive thereto interrupting said audio transmission, switching to said transmitted frequency, and resuming transmission of said audio data using said transmitted frequency.

Abstract: Method for controlling radio transmission of audio data, wherein audio data from an audio player device is FM-modulated and transmitted to be received by an RDS capable FM radio receiver, comprising selecting at least one frequency, transmitting said selected frequency as Alternate Frequency of the RDS system to be received by said RDS capable FM radio receiver, receiving an input and responsive thereto interrupting said audio transmission, switching to said transmitted frequency, and resuming transmission of said audio data using said transmitted frequency.

Abstract: A radio frequency receiver for receiving supplementary data transmitted with a radio station signal. The supplementary data includes one or more information word fields containing supplementary data transmitted with the radio station signal. The receiver includes a host processor for processing the supplementary data; a supplementary data demodulator and decoder for demodulating and decoding a received radio signal to generate a stream of bits representing one or more information word fields; an information word type memory for storing one or more information word type fields; detection circuitry arranged to receive and compare the information word type field decoded by the supplementary data decoder with one or more information word type fields stored in the information word type memory, and to provide a matched condition signal in response to a match between one or more decoded information word type fields and one or more of the corresponding stored information word types fields.

Abstract: A radio frequency receiver for receiving supplementary data transmitted with a radio station signal. The supplementary data includes one or more information word fields containing supplementary data transmitted with the radio station signal. The receiver includes a host processor for processing the supplementary data; a supplementary data demodulator and decoder for demodulating and decoding a received radio signal to generate a stream of bits representing one or more information word fields; an information word type memory for storing one or more information word type fields; detection circuitry arranged to receive and compare the information word type field decoded by the supplementary data decoder with one or more information word type fields stored in the information word type memory, and to provide a matched condition signal in response to a match between one or more decoded information word type fields and one or more of the corresponding stored information word types fields.

Abstract: A method for radio transmission of audio data from an audio player device for receipt by an RDS capable FM radio receiver, comprising scanning an FM frequency range to detect available radio frequencies on which no broadcast transmissions or interfering signals are currently received; storing detected available frequencies; selecting one of the stored frequencies; receiving audio data from the player; modulating received audio data with FM; and transmitting modulated audio data on the selected frequency. A corresponding electronic device comprises a receiver for scanning an FM frequency range to detect the above-mentioned type of available radio frequencies; a memory device for storing same; a controller for selecting one of the stored frequencies; an audio input interface for receiving audio data from the player; and a transmitter for modulating received audio data with FM and transmitting modulated audio data on a frequency selected by the controller.

Abstract: A radio frequency receiver for receiving supplementary data transmitted with a radio station signal, said supplementary data comprising one or more information word fields containing supplementary data transmitted with the radio station signal, said receiver comprising: a host processor for processing said supplementary data; a supplementary data demodulator and decoder for demodulating and decoding a received radio signal to generate a stream of bits representing one or more information word fields; a information word type memory for storing one or more information word type fields; detection circuitry arranged to receive and compare the information word type field decoded by the supplementary data decoder with one or more information word type fields stored in the information word type memory, and to provide a matched condition signal in response to a match between one or more decoded information word type fields and one or more of said corresponding stored information word types fields, and wherein the

Abstract: An automatic gain control circuit is used to vary the gain of a low noise amplifier and baseband amplifiers in a direct conversion receiver in a mobile telephone handset. The automatic gain control circuit is configured to cause a power level (57) of a signal supplied to an analog-to-digital converter having a signal-to-noise ratio of 33 dB to converge on a reference level (49) using a two-stage process.

Abstract: A radio frequency receiver for receiving supplementary data transmitted with a radio station signal, said supplementary data comprising one or more information word fields containing supplementary data transmitted with the radio station signal, said receiver comprising: a host processor for processing said supplementary data; a supplementary data demodulator and decoder for demodulating and decoding a received radio signal to generate a stream of bits representing one or more information word fields; a information word type memory for storing one or more information word type fields; detection circuitry arranged to receive and compare the information word type field decoded by the supplementary data decoder with one or more information word type fields stored in the information word type memory, and to provide a matched condition signal in response to a match between one or more decoded information word type fields and one or more of said corresponding stored information word types fields, and wherein the rec