|
RadioDNS is a method for a hybrid radio receiver, meaning one receiving the broadcast radio signal and connected to the Internet, to find the Internet address of the interactive service corresponding to the radio station actually tuned. It uses the existing Domain Name System to allow the connected radio receiver to look up web resources based on their broadcast parameters, such as the station identifier received within the broadcast signal. The project is an open standard, initially created by a series of broadcasters and manufacturers.〔(About RadioDNS ), radiodns.org〕 ==Details== The standard supports several radio bearers including VHF/FM, DAB, DRM and AMSS. Using a standardised format, a fully qualified domain name (FQDN) is constructed and queried. This returns a CNAME record known as the "authoritative FQDN", which is a domain that represents the requested radio service. From this domain, SRV record lookups can be performed to verify the availability and location of various other applications that utilise RadioDNS. For example, an FM radio service is identified by its RDS parameters. To identify a radio service on 95.8 MHz with a country code of E1 and the PI code C479, the following FQDN is constructed: 09580.c479.ce1.fm.radiodns.org Querying this domain returns a CNAME record: 09580.c479.ce1.fm.radiodns.org canonical name = rdns.musicradio.com. This CNAME record can then be used to look up SRV records that advertise the availability of applications based upon RadioDNS (in this example an application identified by the name radiovis): _radiovis._tcp.rdns.musicradio.com service = 0 100 80 vis.musicradio.com. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「RadioDNS」の詳細全文を読む スポンサード リンク
|