ES389339A1 - Road condition broadcasting - Google Patents

Road condition broadcasting

Info

Publication number
ES389339A1
ES389339A1 ES389339A ES389339A ES389339A1 ES 389339 A1 ES389339 A1 ES 389339A1 ES 389339 A ES389339 A ES 389339A ES 389339 A ES389339 A ES 389339A ES 389339 A1 ES389339 A1 ES 389339A1
Authority
ES
Spain
Prior art keywords
pilot
transmitter
transmission
carrier wave
programs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
ES389339A
Other languages
Spanish (es)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alcatel Espana SA filed Critical Alcatel Espana SA
Publication of ES389339A1 publication Critical patent/ES389339A1/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/091—Traffic information broadcasting
    • G08G1/094—Hardware aspects; Signal processing or signal properties, e.g. frequency bands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/08—Transmission systems not characterised by the medium used for transmission characterised by the use of a sub-carrier

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Circuits Of Receivers In General (AREA)
  • Transmitters (AREA)

Abstract

A unidirectional broadcasting system for the information of the state of the roads with two or more different programs that have been broken in time on one and always the same carrier of the transmitter of a broadcasting network and for the selection of one of the programs using a frequency Pilot additionally modulated on the carrier wave characterized in that the programs that do not have to be distinguished for their selection are broadcast by the transmitter using a transmission method that includes the oscillations of a pilot of frequency defined in its modulation spectrum in accordance especially with the known methods of transmission compatible in stereo with ultra-short waves, while that program to be distinguished and, in particular, that of diffusion of road and traffic conditions, is carried out using a transmission method consisting of the first transmission method by disconnecting the tone pilot and having in the receiving units that are part of the broadcasting network some equipment tuned to the carrier wave of the transmitter which, upon reception and demodulation of the carrier wave without the pilot tone and within its modulation spectrum, connect modulating the received program to an audio-frequency transmission circuit to which a loudspeaker is connected, simultaneously interrupting the transmission routes of the audio circuits that come from other sources of phono. (Machine-translation by Google Translate, not legally binding)
ES389339A 1970-03-21 1971-03-18 Road condition broadcasting Expired ES389339A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702013659 DE2013659A1 (en) 1970-03-21 1970-03-21 Process and facilities for the implementation of a unidirectional traffic warning radio

Publications (1)

Publication Number Publication Date
ES389339A1 true ES389339A1 (en) 1973-06-01

Family

ID=5765875

Family Applications (1)

Application Number Title Priority Date Filing Date
ES389339A Expired ES389339A1 (en) 1970-03-21 1971-03-18 Road condition broadcasting

Country Status (9)

Country Link
AT (1) AT315245B (en)
BE (1) BE764597A (en)
CH (1) CH556581A (en)
DE (1) DE2013659A1 (en)
ES (1) ES389339A1 (en)
FR (1) FR2083479B1 (en)
GB (1) GB1326123A (en)
NL (1) NL7103614A (en)
SE (1) SE371728B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60251724A (en) * 1984-05-29 1985-12-12 Pioneer Electronic Corp Receiver for identifying program

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1125864A (en) * 1966-06-15 1968-09-05 Philips Electronic Associated Improvements in or relating to radio receivers

Also Published As

Publication number Publication date
SE371728B (en) 1974-11-25
DE2013659A1 (en) 1971-10-07
CH556581A (en) 1974-11-29
NL7103614A (en) 1971-09-23
GB1326123A (en) 1973-08-08
AT315245B (en) 1974-05-10
FR2083479B1 (en) 1975-10-31
FR2083479A1 (en) 1971-12-17
BE764597A (en) 1971-09-22

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