When you are drving on the road,do you want to know and avoid the traffic?Of course,all of the drivers want to know which way is the free road and can be get to desitination fast!Then,do you know what help you to reach this effect?That's Traffic Message Channel, which we also call TMC.What's the meaning of Traffic Message Channel?let's learn it From Wikipedia first:
Traffic Message Channel (TMC) is a technology for delivering traffic and travel information to drivers. It is typically digitally coded using the FM-RDS system on conventional FM radio broadcasts. It can also be transmitted on DAB or satellite radio. It allows silent delivery of relevant information in the language chosen by the user and without interrupting normal services. Services, both public and commercial, are now operational in many countries worldwide. When data is integrated directly into a navigation system, this gives the driver the option to take alternative routes to avoid traffic incidents.
How it works
Each traffic incident is sent as a TMC message. One message consists of an event code and a location code in addition to time details.
The message is coded according to the Alert C standard. It contains a list of max 2048 events (1402 pr 01.02.2007) which can be translated by a TMC receiver into the language of the user.
Location code tables are maintained on a national level and assign numbers to locations on the road network. Those location tables are integrated in the maps provided by NAVTEQ and Tele Atlas.
The source of traffic information is typically police, traffic cameras, loops, floating car data and others.
According to our experience,only the Europe country has this TMC system can be working,so we can add the TMC function to the car dvd player for the Eruope customer now.But not for all model of the car dvd player,just some of them,And now which model of the car dvd player has this TMC functions?Let's show you here:
Car DVD player Volkswagen Skoda Seat7019
Car DVD player Volkswagen Golf 8518
Car DVD Player Opel Astra Vectra Zafira 7105
2 Din Car DVD player7013
And please pay attention that the TMC need to be added to the car dvd player with the DVB-Ttogether,so if you need the TMC function,please add the DVB-T as options first.