A plurality of zone players, including at least a first player and a second zone player, wherein the first zone player is designated as a master device of a synchrony group, a method comprising: determining, by the first zone player, that the second zone player should be designated as the master device of the synchrony group; instructing, by the first zone player, the second zone player to be designated as the master device of the synchrony group; and causing, at the first zone player, the first zone player to lose its designation as the master device of the synchrony group.

Systems, methods, and processor readable media are disclosed for detection of signal quality problems and errors in digital radio broadcast signals. First monitoring equipment is located in an over-the-air coverage area of a first radio station. Second monitoring equipment is located in an over-the-air coverage area of a second radio station. The first and second monitoring equipment are configured to receive digital radio broadcast signals from the respective first and second radio stations. A computing system is configured to receive data from the first monitoring equipment and the second monitoring equipment, the data being indicative of one or more attributes of a digital radio broadcast signal received at respective monitoring equipment. The computing system analyzes received data to detect a signal quality problem or error in the digital radio broadcast signals received at the first and second monitoring equipment.

A digital broadcast receiver and method are provided. The digital broadcast receiver comprises an input, an anti-virus unit and a host interface. The input is configured to receive a digital broadcast. The anti-virus unit is configured to carry out an anti-virus check on the at least one data channel received as part of the digital broadcast. The host interface is configured to provide the at least one decoded data channel to a host.

The present disclosure relates to a method and system for receiving a broadcast signal. The system includes a broadcast receiver device having two receiving units, two decoding units, a combining unit and a further processing unit. A broadcast signal is received by both receiving units, so that two reception signals are provided. From each reception signal, a raw data stream is extracted and decoded by the decoding units. It is checked if the data stream provided by each decoding unit is complete. If a first data stream is complete, it is processed by the further processing unit. If the first data stream is incomplete and the second data stream is complete, the second data stream is further processed. If both data streams are incomplete, they will be combined to a combined data stream by the combining unit, the combined data stream being further processed, if it is complete.

A method performed by at an importer-exporter of an in-band on-channel (IBOC) digital radio broadcasting system comprises: receiving, from a first audio client, first protocol data units (PDUs) (first PDUs) of encoded main audio and that include first sequence numbers that progress in a first order; sending the first PDUs for transmission over a logical channel of an IBOC waveform; receiving, from a second audio client, second PDUs of encoded non-main audio and that include second sequence numbers; aligning the second PDUs to the first PDUs by aligning the second sequence numbers to the first sequence numbers, to produce aligned second PDUs; and switching to sending the aligned second PDUs for transmission over the logical channel in place of the first PDUs such that the second sequence numbers of the aligned second PDUs after switching maintain the first order of the first sequence numbers as established prior to switching.

A method for broadcast service following for a vehicle includes a first step of continuously, or in given time intervals, estimating a signal quality and/or signal availability of the DAB service and/or the cellular network based broadcast service in a route section the vehicle is expected to reach in a given time span. The method also includes a second step of performing a handover from the DAB service to the corresponding cellular network based broadcast service dependent on the estimated signal quality and/or signal availability. The first step may depend on provided data base information. The first step may in addition, or in the alternative, depend on service information, which is included in a received DAB signal.

Systems, methods, and processor readable media are disclosed for detection of signal quality problems and errors in digital radio broadcast signals. First monitoring equipment is located in an over-the-air coverage area of a first radio station. Second monitoring equipment is located in an over-the-air coverage area of a second radio station. The first and second monitoring equipment are configured to receive digital radio broadcast signals from the respective first and second radio stations. A computing system is configured to receive data from the first monitoring equipment and the second monitoring equipment, the data being indicative of one or more attributes of a digital radio broadcast signal received at respective monitoring equipment. The computing system analyzes received data to detect a signal quality problem or error in the digital radio broadcast signals received at the first and second monitoring equipment.

A system is described for maintaining synchrony of operations among a plurality of devices that have independent clocking arrangements. The system includes a task distribution device that distributes tasks to a synchrony group comprising a plurality of devices that are to perform the tasks distributed by the task distribution device in synchrony. The task distribution device distributes each task to the members of the synchrony group over a network. Each task is associated with a time stamp that indicates a time, relative to a clock maintained by the task distribution device, at which the members of the synchrony group are to execute the task. Each member of the synchrony group periodically obtains from the task distribution device an indication of the current time indicated by its clock, determines a time differential between the task distribution device's clock and its respective clock and determines therefrom a time at which, according to its respective clock, the time stamp indicates that it is to execute the task.

A system is described for maintaining synchrony of operations among a plurality of devices that have independent clocking arrangements. The system includes a task distribution device that distributes tasks to a synchrony group comprising a plurality of devices that are to perform the tasks distributed by the task distribution device in synchrony. The task distribution device distributes each task to the members of the synchrony group over a network. Each task is associated with a time stamp that indicates a time, relative to a clock maintained by the task distribution device, at which the members of the synchrony group are to execute the task. Each member of the synchrony group periodically obtains from the task distribution device an indication of the current time indicated by its clock, determines a time differential between the task distribution device's clock and its respective clock and determines therefrom a time at which, according to its respective clock, the time stamp indicates that it is to execute the task.

A system is described for maintaining synchrony of operations among a plurality of devices that have independent clocking arrangements. The system includes a task distribution device that distributes tasks to a synchrony group comprising a plurality of devices that are to perform the tasks distributed by the task distribution device in synchrony. The task distribution device distributes each task to the members of the synchrony group over a network. Each task is associated with a time stamp that indicates a time, relative to a clock maintained by the task distribution device, at which the members of the synchrony group are to execute the task. Each member of the synchrony group periodically obtains from the task distribution device an indication of the current time indicated by its clock, determines a time differential between the task distribution device's clock and its respective clock and determines therefrom a time at which, according to its respective clock, the time stamp indicates that it is to execute the task.