Ràdio / Radio

Tècnica / Technics

• Modulació / Modulation

  • 	analogue	digital
    				bits/symbol	constellation
    amplitude	AM	ASK (Amplitude Shift Keying)	OOK (On-Off Keying)	1
    			QAM (Quadrature Amplitude Modulation)
    phase		PSK (Phase Shift Keying)	BPSK (Binary Phase Shift Keying)	1
    			QPSK (Quadrature Phase Shift Keying)	2
    			DQPSK (Differential Quadrature Phase Shift Keying)	2
    frequency	FM	FSK

• Ràdio galena / Crystal radio
• Building a crystal radio out of household items
• This Amateur Radio Antenna Is Made From a Single Tape Measure
• How a Crystal Radio Works (yt)
• Software Defined Radio
• Practical Guide to Radio-Frequency Analysis and Design
  • Radio frequency demodulation
    • Understanding quadrature demodulation
• RDS - Radio Data System - and FM-DXing
  • External RDS reader
  • Programari / Software
    • Radio Data System (RDS) Wiki v4l
    • rdsd
    • Softwaredecoder für das RDS - System
    • RDS DECODING SOFTWARE
    • PROGRAMAS PARA DESCODIFICAR RDS
    • Esslinger
      • RDS toolkit
      • RDS Decoder for Windows
    • RDS encoder
      • Airomate
  • Maquinari / Hardware
    • Build your own RDS decoder! (Puskas Barnabas)
    • Construye tu propio decodificador de RDS para PC
    • Atmel AVR Atmega168 RDS decoder with serial output (Hauppauge WinTV MPX out)
    • Microtune MT1390 / MT1393
    • A turnkey basis for your own RDS hardware (Esslinger) (pdf: see at the end)
    • Decodificador RDS
  • RDS casolà per l'ordinador
• DAB (Digital Audio Broadcasting)
  • ETSI Estàndards / Standards ()
    • ETSI EN 300 401 "Digital Audio Broadcasting (DAB) to mobile, portable and fixed receivers"
    • ETSI TS 101 756 "DAB Registered Tables"
    • ETSI TS 102 427 "DAB. Data broadcasting - MPEG2 TS streaming"
  • World DAB
  • Ràdio Digital Terrestre a Catalunya (STSI)
  • RNE DAB
  • DAB vs DAB+
  • Digital Radio Tech
  • Notícies / News
    • El Gobierno aprueba un plan para impulsar la digitalización de la radio
• DVB-T2A
  • Switchover to DAB: the worst system at the worst possible time (DAB, DAB+, DVB-T2,...)
  • Should DVB-T2 be considered as a replacement for DAB instead of DAB+ ?
• Radio híbrida / Hybrid radio
  • RadioDNS (wp)
    • Developers
      • Testing tools
      • Discussion boards
        • RadioDNS developers (Google Groups)
        • RadioVIS developers
        • RadioEPG developers
          • Use of wildcards in urls
    • Info
      • RadioDNS published as ETSI Standard
        • "RadioDNS Hybrid Radio; Hybrid lookup for radio services" - ETSI TS 103 270 V1.1.1 (2015-01) (pdf)
      • Howto
        • HOWTO - Register your station for RadioDNS Hybrid Radio (pdf)
        • HOWTO - Add SRV records to your Authoritative FQDN (pdf)
      • An overview of RadioDNS (YouTube)
      • RadioDNS and RadioVIS – Getting Started
      • Broadcasters
        • BBC
          • Experiments with RadioDNS (2009)
          • RadioDNS - making your radio more intelligent (2008)
    • Specification
      • ...
    • Serveis / Services

      • former name	service name	description	specification	usage	protocol (port)	SRV	served files
        	RadioDNS Hybrid Radio; Hybrid lookup for radio services		TS 103 270 v1.3.1
        RadioVIS	Visual Slideshow	Visualisation	RVIS01 v1.1.0 TS 101 499 v3.1.1	image slide show (SHOW ...) text messages (TEXT ...)	STOMP (61613) HTTP (80)	_radiovis._tcp	/topic/[fm,dab]/<gcc|country>/<pi>/<frequency>/text/ /topic/[fm,dab]/<gcc|country>/<pi>/<frequency>/image/
        RadioEPG	Service and Programme Information	Electronic Programme Guide	REPG01 v1.1.0 TS 102 818 v3.2.1	EPG service-following logos		_radioepg._tcp	http://<epg_server>/radiodns/epg/XSI.xml
        RadioTAG	Tagging	Tagging, give feedback	radiotag v1.0.0 draft 5	tag or bookmark radio content give feedback		_radiotag._tcp

      • RadioVIS
        • gcc/country (specification v1.1.0, section 2.1)
          • gcc (Global Country Code) (3 char hexadecimal)
            • first_nibble_RDS_PI + RDS_ECC
          • country (2 char string)
            • ISO 3166 2-char country code
        • STOMP transport
          

          frame	headers	RadioDNS body	meaning
          MESSAGE	STOMP headers: content-length: ... expires: ... destination: ... subscription: ... priority: ... message-id: ... timestamp: ... RadioDNS custom headers: trigger-time: [NOW, <ISO-8601_datetime>] link: <512-char url of associated content>	TEXT <128-char text>	show a text
          		SHOW <url>	show an image

        • Long polling HTTP (Comet) transport
      • RadioEPG
        • RadioDNS XSI Generation Tool
          • Service Provider
          • Service
    • Providers
      • MyRadioDNS
      • EBU
    • Adreces:
      

      	RDS / DAB	RadioDNS entry	DNS Authoritative FQDN	SRV
      				RadioVIS	RadioEPG	RadioTAG
      		concatenation of parameters	nslookup -type=CNAME ...	nslookup -type=SRV _radiovis._tcp.<prev_column_wo_final_dot>	nslookup -type=SRV _radioepg._tcp...	nslookup -type=SRV _radiotag._tcp...
      		<freq>.<PIcode>.<ECCcountry>.[fm,dab].radiodns.org	dig <prev_column> cname	dig _radiovis._tcp.<prev_column_wo_final_dot> srv	dig _radioepf._tcp.<prev_column_wo_final_dot> srv	dig _radiotag._tcp.<prev_column_wo_final_dot> srv
      FM RDS	frequency: 98.80MHz PI: c201 ECC: ce1	09880.c201.ce1.fm.radiodns.org	bbc.co.uk.	0 100 61613 radiovis.external.bbc.co.uk.	-	-
      	frequency: 95.80MHz PI: c586 ECC: ce1	09580.c586.ce1.fm.radiodns.org	vis.media-ice.musicradio.com.	0 100 80 vis.musicradio.com.
      	...	...fm.radiodns.org	rdns.ebulabs.org.	0 100 61613 radiovis.ebu.io.	0 100 80 radiovis.ebu.io.	radiodns1.ebu.ch. coinchon.ebu.ch. 2014011301 1200 600 2419200 36000
      DAB	SCIdS: 0 SId: c221 EId: ce15 ECC: ce1	0.c221.ce15.ce1.dab.radiodns.org

    • Exemple:
      • EBU labs
        • dig ...fm.radiodns.org cname
          • ... CNAME   rdns.ebulabs.org.
        • dig _radiovis._tcp.rdns.ebulabs.org srv
          • ;; ANSWER SECTION:
            _radiovis._tcp.rdns.ebulabs.org. 900 IN SRV     0 100 61613 radiovis.ebu.io.
        • telnet radiovis.ebu.io 61613
          • ...
      • Capital 95.8MHz, UK
        • dig 09580.c479.ce1.fm.radiodns.org cname
          • ;; ANSWER SECTION:
            09580.c479.ce1.fm.radiodns.org. 900 IN  CNAME   rdns.musicradio.com.
        • dig _radiovis._tcp.rdns.musicradio.com srv
          • ;; ANSWER SECTION:
            _radiovis._tcp.rdns.musicradio.com. 3600 IN SRV 0 100 61613 vis.musicradio.com.
        • telnet vis.musicradio.com 61613
          • Notes
            • ^@ = Ctrl+@
            • ^] = Ctrl+]
          • Trying 81.20.48.151...
Connected to 81.20.48.151.
Escape character is '^]'.
          • CONNECT

^@
          • CONNECTED
session:d0...
          • SUBSCRIBE
id:33
destination: /topic/fm/ce1/c479/09580/image
ack: auto

^@
          • MESSAGE
content-length:100
expires:0
trigger-time:NOW
destination:/topic/fm/ce1/c479/09580/image
link:http://www.capitalfm.com/london/on-air/schedule/
subscription:33
priority:4
message-id:ID:lqctwebnode1-46598-1577975869393-2:1:-1:1:42480248
timestamp:1578156710181

SHOW http://slideshow.musicradio.com/slides/GCap_Media/One_Network/Capital_Radio/OnAirNow_235939.jpg
            
          • MESSAGE
...
          • ...
          • UNSUBSCRIBE
id:33

^@
          • DISCONNECT
receipt:77

^@
          • RECEIPT
receipt-id:77

Connection closed by foreign host.
  • Programari / Software
    • Software libraries (radiodns.org)

    • 	authoring	server	client
      EBU Technical Labs	Content manager 2.0 ebu-content-manager (.net)	RadioDNS manager radiodns-plugit (Python, based on EBU PlugIt) ebu-radiovis-server (Java) RabbitMQ with STOMP ActiveMQ with STOMP	radiotag.js RadioVIS HTML5 player (web sockets) radiovis-html5player (github) ebu-radiovis-webplayer (*) (ebu-radiovis-ajaxplayer) radiovis-svg-widget
      	RadioVIS generator (Inkscape, Ruby)	node-radiovis (node.js)	pyradiodns (python) php-radiodns (php)
      			RadioVIS Demo (BBC) (Python)
      			Android RadioVIS Demo Smart Audio Station
      			WWW RadioDNS tool checker

    • Servidor / Server
      • STOMP
      • Message broker
        • Apache ActiveMQ
          • ActiveMQ / STOMP setup
          • ActiveMQ and RadioVIS: Some of the useful things I have learnt from two years of fighting to keep a server running (pdf)
        • RabbitMQ
          • RabbitMQ with STOMP
      • HOWTO
        • Add SRV records to your authoritative FQDN
          • use DNS hosting tools (e.g. AWS Route53)
        • Make an XSI file accessible to RadioDNS Hybrid Radio Devices
  • Manufacturers
    • HTC
      • Hybrid Radio Demo (YouTube)
    • Samsung
      • Samsung phones integration for RadioDNS

http://www.francescpinyol.cat/radio.html
Darrera modificació: 17 de febrer de 2023 / Last update: 17th February 2023