A DARC signal demodulation circuit assemblage for recovering a DARC signal (DARC data) from an FM multiplex transmission signal includes: a pilot tone regulation circuit to obtain first and second mutually orthogonal oscillation synchronous with a stereo pilot tone encompassed by the FM multiplex transmission signal; a frequency quadruplication section for obtaining third and fourth mutually orthogonal oscillation having a frequency quadrupled as to the stereo pilot tone; a first multiplication section for obtaining a first multiplication signal from the FM multiplex transmission signal and from the third oscillation; a second multiplication section for obtaining a second multiplication signal from the FM multiplex transmission signal and from the fourth oscillation; first/second low-pass filters for obtaining first/second DARC signal components by low-pass filtration of the first and second multiplication signals; and an FM demodulation section for obtaining the DARC signal from a frequency demodulation of the first/second DARC signal components.

Embodiments are disclosed of methods and systems for providing information in a single FM tuner system. An example method according to the disclosure provides station information in a single FM tuner system, and comprises receiving radio data system (RDS) data/radio broadcast data system (RBDS) data by the single FM tuner system; extracting frequency information regarding receivable stations from the received RDS/RBDS data and displaying a list of the receivable frequencies; extracting additional information regarding the receivable stations from the received RDS/RBDS data, and displaying the extracted additional information regarding the receivable stations in correspondence with the respective receivable frequencies in the list. Further a single FM tuner system is provided for carrying out the method.

A synchronization server creates an augmented radio listener experience by providing additional information, especially visual information, over a concurrent, parallel data connection to a user device during the radio broadcast. The additional information is synchronized to the radio broadcast item then playing, based on an event message received by the synchronization server from the radio station equipment. The synchronization server can implement real-time interactions between connected radio listeners and a disk jockey dashboard of the radio station. The synchronization server optionally can personalize advertisement content for transmission to user devices based on user profile information and audience criteria provided by the advertiser.

Implementing and applying a database with radio station information that is gathered from client devices as stations become available to a plurality of users (i.e., “crowd sourced” radio station information) and allowing for a client device to download only the radio station information that is pertinent to the travel route of the user and/or radio station selection criteria associated with the client device or the user. Radio station information can be rendered via a graphical interface of a client device to allow the user to informatively select a new radio station, either before or as a current radio signal degrades to the point of being unusable. Radio station information may be rendered to cause the user's terrestrial radio to tune to a new station.

Implementing and applying a database with radio station information that is gathered from client devices as stations become available to a plurality of users (i.e., “crowd sourced” radio station information) and allowing for a client device to download only the radio station information that is pertinent to the travel route of the user and/or radio station selection criteria associated with the client device or the user. Radio station information can be rendered via a graphical interface of a client device to allow the user to informatively select a new radio station, either before or as a current radio signal degrades to the point of being unusable. Radio station information may be rendered to cause the user's terrestrial radio to tune to a new station.

A method for processing audio signals in a radio transmitter, includes: receiving an analog audio sample stream and a digital audio sample stream; determining offsets in time between the analog audio stream and the digital audio stream using a normalized cross-correlation of audio envelopes of the analog audio sample stream and the digital audio sample stream; filtering the determined offsets in time to produce filtered offset values; determining an alignment slip adjustment value as a function of the filtered offset values; aligning the analog audio sample stream and the digital audio sample stream using the determined alignment slip adjustment value; and generating a hybrid radio signal for broadcast that includes time-aligned analog audio and digital audio.

A system and method for broadcast response generally employing RDS, DARC, or similar technology is provided, including a method for responding to a broadcast comprising extracting an event identifier from a broadcast signal; detecting a response by a user to the broadcast signal; polling a communications device to determine a user identifier; and communicating the event identifier and the user identifier when the user response is detected.

Disclosed is an electronic device including a communication module, a processor and a memory that stores instructions. The instructions, when executed, cause the processor to receive a first signal from a first external electronic device through the communication module while a communication connection to at least one second external electronic device is being established, select a specified number of third external electronic devices or less from among the first external electronic device and the at least one second external electronic device based on the first signal, and transmit data to or receive data from the selected third external electronic devices through established communication connections to the selected third external electronic devices. The third external electronic devices are selected in order of having a weak signal intensity or a greater distance from the electronic device from among the first external electronic device and the at least one second external electronic device.

A receiver (10) includes one or more tuners (12) and one or more controller-circuits (28). The one or more tuners (12) are operable to receive broadcast-signals (14) from transmitters. The broadcast-signals (14) include metadata (16) that includes the broadcast-station-name (18). The one or more controller-circuits (28) are in communication with the one or more tuners (12). The one or more controller-circuits (28) store the metadata (16) in a first-memory-location (32), detect metadata-sequences (38) based on the metadata (16) stored in the first-memory-location (32), count occurrences (40) of each metadata-sequence (38), determine whether the count of occurrences (40) of each metadata-sequence (38) is greater than a first-threshold (42), determine the broadcast-station-name or its sequences (18) and store the broadcast-station-name (18) in a second-memory-location (44). A method (100) of operating a receiver (10) is also provided.

A method performed by a cloud-based connected radio service associated with broadcast radio stations includes: receiving cellular network information and broadcast radio audio stream information from multiple client radios over wireless data connections with the multiple client radios; upon determining that the multiple client radios are all simultaneously accessing a same unicast audio stream associated with a particular broadcast radio station among the broadcast radio stations over a same cellular network based on the cellular network information and the broadcast radio audio stream information, configuring the same cellular network to convert a designated audio stream associated with the particular broadcast radio station to a multicast audio stream; and upon receiving a multicast address for the multicast audio stream from the same cellular network, sending the multicast address to the multiple client radios over the wireless data connections to enable the multiple client radios to access the multicast audio stream.