摘要:
Satellite receiving channel data 810 are described in a network information table (NIT) in a random fashion. Frequencies in the redelivering facility in a community receiving system are arranged in order of increasing frequencies for each of the networks. In a receiver unit, the frequencies 753 of the satellite receiving channel data 810 are rearranged in order of increasing frequencies and are registered to the receiving frequencies 831 in a frequency conversion table 830. The receiver unit selects the frequency according to wire frequencies 822 of a wire channel 821 in a wire frequency table 820 and registers the wire frequency of a channel that can be normally received to a conversion frequency 832 in the frequency conversion table 830. Therefore, the frequency data contained in the broadcast signals before being redelivered are corresponded to the redelivering frequency of signals really transmitted through a cable on the receiver unit side in the community receiving system.
摘要:
A digital radio device (10) for emitting a radio signal in digital format comprising a transmitter stage (14) able to emit a radio signal in digital format, a transceiver module (12) for radio access to a wireless data network (NT) connected to the transmitter stage, means (MP) for extracting a data stream from the wireless network and sending it to the transmitter stage so that it can be radio broadcast locally.
摘要:
An electronic device for point-to-multipoint transmission of a digital signal over a radio communication network includes a transmitter-receiver configured to receive a radio-frequency input digital signal and generate therefrom a baseband digital signal and includes a digital signal processor. The digital signal processor includes a receiving module, an input buffer, an audio decoder module and an output buffer. The transmitter-receiver is further configured to receive the duplicated baseband output digital signal and generate therefrom a radio-frequency output digital signal. The transmitter-receiver is configured to receive the radio-frequency input digital signal on the basis of Bluetooth® specifications and transmit the radio-frequency output digital signal on the basis of Bluetooth® specifications, and the microcontroller is configured to realize a unidirectional asynchronous packet data link. There is further described a system for point-to-multipoint radio transmission including a plurality of electronic devices for point-to-multipoint transmission of a digital signal over a radio communication network.
摘要:
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Einblenden von Alarmmeldungen in einem DAB-Ensemble insbesondere innerhalb eines Tunnels. Das Verfahren sieht dabei vor, dass in dem DAB-Gleichwellennetz globale DAB-Signale als DAB-Ensemble ausgestrahlt werden und ein im DAB-Gleichwellennetz betriebener Sender die globalen DAB-Signale des DAB-Gleichwellennetzes netzsynchron mit einem erzeugten DAB-Signal überstrahlt, dessen Konfiguration aus dem FIC des globalen DAB-Signals abgeleitet wird, wobei das Verfahren die Schritte umfasst: (a) Verteilen (316) der einzublendenden Alarmmeldung (315) auf Audio-Encoder (317, 318, 319), die jeweils genau einen der im DAB-Ensemble enthaltenen Audio-Standards umfassen; (b) Komprimieren der verteilten Alarmmeldung mittels der Audio-Encoder (317, 318, 319) auf eine Datenrate, die kleiner oder gleich der niedrigsten im DAB-Ensemble vorkommenden Audio-Datenrate ist; (c) Reformatieren (324) der komprimierten Alarmmeldungen von Schritt (b) auf jede im DAB-Ensemble vorkommende Audio-Datenrate (321); (d) Auswahl (326) jeweils einer reformatierten Alarmmeldung (325) aus Schritt (c) pro Audio-Sub-Channel, welche die gleiche Datenrate und den gleichen Audio-Standard wie der jeweilige Audio-Sub-Channel besitzt; und (e) Einblenden der in Schritt (d) ausgewählten Alarmmeldungen (327) in die jeweiligen Audio-Sub-Channels.
摘要:
A data broadcast program TS transmission apparatus outputs a data broadcast program TS transmitted by the local broadcast station having the apparatus in accordance with a data broadcast program TS delivered by a second broadcast station via a network. A judgment list storage block stores a selection list containing data representing whether a received data broadcast program element is to be included in the data broadcast program TS of the local station, a replacing list for replacing the data broadcast program element with a local broadcast station program element prepared by the local broadcast station, etc. A separation judgment block separates a TS packet from the received data broadcast program TS and referencing the selection list, reports to a replacement/synthesis block those to be included in the data broadcast program TS of the local broadcast station. Furthermore, if there is a data broadcast program element to be replaced, the separation judgment block reports it to the replacement/synthesis block. The replacement/synthesis block reads out from the program element storage block a local broadcast station program element which the replacement/ synthesis block has been instructed to replace, generates a TS packet, and outputs it as a local broadcast station data broadcast program TS together with the selected TS packet to a multiplexing apparatus.