• DUDU OS

  • Guide for Adapting Radio Icons for Submissions

Hi, how do you handle radio stations that share the same broadcasting frequency? One radio station will take the morning slot while another will take the night slot.

    Is it possible for a software engineer to create a program that just scrapes the data from here.

    USA Information:
    https://commons.wikimedia.org/wiki/Category:Logos_of_FM_radio_stations_in_the_United_States_by_state

    By Country:
    https://commons.wikimedia.org/wiki/Category:Radio_station_logos_by_country

      pwychuckie For radio stations sharing the same frequency but using different names, there's no way to achieve perfect compatibility. The only options are to select one of them, not display them at all, or merge the names/logos of both stations - though this merged presentation may appear somewhat awkward.

        picasso1850 Thank you for sharing! We've already collected over 50,000 radio station entries from other sources, with coverage spanning major cities in the United States and other countries worldwide. If any information appears incomplete, everyone is welcome to supplement the existing data.

          • SSDenKrUA

            • Post #28
            • Edited
            • This post is in polski

            Europe-Poland-Kraków, Województwo małopolskie

            krakow-krakow.zip
            828kB

              Europe - Russian Federation - Ufa

              ufa-ufa.zip
              380kB

                SDenKrUA The radio station information you provided has been updated to the database.

                    Almaz_SA The radio station information you provided has been updated to the database.

                      • Ssurfer63

                      • Post #32
                      • Edited
                      • This post is in Nederlands

                      I am a bit confused.
                      I have been offline for some time, but where originates the Dutch list from? I currently see Amsterdam, Den Haag, Eindhoven, Enschede, Groningen, Rotterdam, Utrecht. Those are simply some of the biggest cities in the Netherlands. Are those entries added by other users because they live there? And which stations are in those city collections?

                      The official list with cities with radio towers in the Netherlands is Almelo,Almere,Alphen aan den Rijn,Ameland,Amersfoort,Amsterdam,Apeldoorn,Arnhem,Assen,Breda,Delft,Den Bosch,Den Haag,Den Helder,Deventer,Doetinchem,Dordrecht,Drachten,Ede,Eindhoven,Emmen,Enkhuizen,Enschede,Goes,Gouda,Groningen,Haarlem,Heerenveen,Heerlen,Hengelo,Hilversum,Leeuwarden,Leiden,Lelystad,Maastricht,Middelburg,Nijmegen,Purmerend,Roermond,Rotterdam,Sneek,Terneuzen,Terschelling,Texel,The Hague,Tilburg,Utrecht,Venlo,Winschoten,Zwolle.

                      Some offer a lot of radio stations. Others only the country wide stations and other only a few or even a single local radio station.
                      And there are a few cities with local stations transmitting with "micro" power output.

                      This is not efficient. It would mean that I need 775 png files where only 279 (the unique radiostations) would be necessary for all FM stations with RDS in the Netherlands.
                      If you only look at the country wide stations, I would need 111 png files for all cities instead of the 28 png files for the unique radio stations.
                      If this gets escalated over all the countries, it will be huge.
                      Unless you use a local internal sqlite database, where you collect unique png files in one table with a 1_to_many relation linking the unique png files to the many cities and frequencies. And this png files do not need to be in the database itseld. Only a pointer to the png in the assets (or res/drawable-anydpi or res/drawable-nodpi or res/raw. Whatever you like).

                      EDIT: It would also mean a drop-down list of 49 cities, if you count unique cities. This is not user-friendly.

                        surfer63 I'm very sorry for the confusion, and I believe this issue is faced by many other users as well. Currently, all our data comes from internet searches or user contributions, so both city information and radio station details may be incomplete or contain errors. As it's difficult for us to verify actual conditions in all regions, we currently require users to select their city first, then match radio stations based on frequency listings. Due to the enormous volume of data, we have standardized the submission format for radio information to facilitate batch importing into our database through scripts. Users who wish to obtain all radio station information for a specific area for verification or correction purposes can either reply to this thread or contact our administrators through Telegram.

                            LuckyZone

                            Dudu-Huang explained the principle to me on Telegram. When I saw the downloaded zip for the Netherlands, I understood that it works differently than I expected. You select a major city in a region and add to that folder all possible frequencies for a certain station.
                            I also updated and added some stations for two more regions in the Netherlands. And one hour later (or so), they were already available.
                            I updated last Thursday and thought I was on the latest version, but I had missed two versions.
                            Now it works perfectly.

                              6 days later

                              You should associate icons to the radio RDS name and not to the frequency as many radios have different frequency as you cange région while driving. I'm using navradio+ (5€ app) as a substitute to the original radio app, you can download all countries zip files from there.

                                SeVeMaS There is this thing available. But you cannot have them saved as in the navradio+ app. At least in Denmark it works. You have to choose "others" when you select the region/city in your country selection. Then the logos will be assigned after the PI code (RDS data) broadcasted by the radio station.

                                  SeVeMaS

                                  I agree with you. This is how it should work.
                                  The last few months I did hardly drive my car so I really can't test RDS right now.
                                  But I have the idea that RDS still doesn't work correctly and that they implemented some semi-RDS like navRadio can also use. In NavRadio you can assign multiple frequencies for one radiostation. If RDS doesn't work correctly, it checks one of the alternate frequencies that you assigned.

                                  I think the Dudu local radio does the same. You now assign a location/region where you are. If you select some frequency like 92.6 of station XYZ, it will of course be a "strong" reception in that region and it will have an icon belonging to a radio station. And then you possibly assign a few more stations for your region.
                                  Then you start to drive outside your region, the signal gets weaker, the app starts searching for other frequencies with the same radio name in its frequency/name repository and finds the same station name/logo in its repository on 94.8 which has a strong reception in the new region, and switches over to the new frequency.
                                  No RDS, just predefined alternative frequencies, and as a bonus you have immediately your logo as well.
                                  This kind of "semi-RDS" or even "fake-RDS" could work really well, as long as you stay in your own country and someone made a proper selection of the radiostations over the country.
                                  If I now have good "my favourite radio station" reception all over the country, I am happy with such a solution.

                                  But maybe I am wrong in my assumption.

                                      surfer63 Poland, RDS works great because it shows up on the bottom bar, maybe only has a slight delay but everything is within reason. Actually, I have to do tests here how it is in the radio application. I think it is similar to the bottom bar.

                                          wybitny2
                                          Which RDS part?

                                          The RDS-PS, RDS-PI, RDS-PTY, RDS-RT(+) and RDS-TA/TP showing you informative text (RT) and switching to stations that currently broadcast traffic information (TA and TP) has functioned since approximately 2016/2017 on the units that have the RDS functionality enabled inside the FM chip. Earlier units came with FM chips without RDS support. Some of the very cheap 7731 units using a very cheap FM chip, still don't have RDS enabled in the FM-chip. Meaning that RDS will never (software based) function on those units as long as the FM-chip doesn't support it.

                                          I am talking about RDS-AF. That has been non-functioning since 2015 as in China they do not use RDS-AF. Dudu is now trying to get that working for about a year.
                                          About 6 months ago @DUDU-HUANG suggested to use the same pre-defined alternative stations for the dudu-radio, as can also be used within navradio. Having now the FM-<frequency>-<station>.png for (almost) all regions in a country makes me wonder if they use that system, maybe in combination with "real" RDS-AF. Note that for "smooth" functioning of RDS-AF, like builtin car radios use, you need to have 2 FM-chips. These units do not have that.

                                            Xaver I noticed that the region you labeled is "Carinthia" (Kärnten) state, rather than a specific city? Apologies for my lack of familiarity with local conditions—do radio station frequencies in different cities within this state not have overlapping allocations?