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Re: [Discuss-gnuradio] [GSoC 17] DAB: Updates

From: Rafael Diniz
Subject: Re: [Discuss-gnuradio] [GSoC 17] DAB: Updates
Date: Wed, 23 Aug 2017 23:06:48 -0300

Hi Marcus,

Concerning DRM here in Brazil, there is not much activity because of the
immense delay from the government to adopt any standard. Me and a bunch
of hams are carrying some trials with DRM in HF, but just this (from
Parque do Rodeador, an EBC facility). But DRM signals are always on...
in Europe you can hear quite a lot DRM signals in HF.

But changing a bit the topic, one much more relevant piece of software
would be an ISDB-T transmitter for social / community use. There are
really a lot a community TV broadcasters in Argentina and Brazil (may be
in other LA countries also) which would love to power up a gnuradio app
with USRP and have a DTV exciter running. The Antena Negra TV[1] example
in Buenos Aires in very cool.
; )

Rafael Diniz

[1] http://antenanegratv.com.ar/

On 08/18/2017 12:58 PM, Marcus Müller wrote:
> Hi Rafael,
> I don't really see how these are a real problem – if you'd need another
> encoder, just drop one in – shouldn't be that hard to code if you know
> which encoder you'll want to use. Of course, you'd need to adjust some
> bit flags in the flow – but that shouldn't be that hard. So, it's kind
> of hard to imagine that filling a whole GSoC project – BUT!!!: such
> ideas are a great base for GSoC projects, and we should, this time,
> COLLECT SUCH IDEAS EARLY. (I'm not one to lightly wield the power of
> capslock). So, head over to [1] and write that down - if possible with
> your name, so that in half a year we still remember who to bring
> together to make this happen.
> What I do read from your email is that there's an inherent demand for a
> specific, non-LC, multi-service input from a community in Brazil – and
> that's pretty awesome!!! Felix and I haven't heard from all that many
> users, and it's rare that one hears from people who seem to actively use
> it aside from testing their own DRM receivers and such. Personally,
> whoever builds receivers should probably shovel over some money to the
> authors if they need improvements to use it manufacturing, but an active
> community of people planning to use it in broadcast/communication///is
> something the gr-drm project should foster/. And: discussing this here
> will definitely enhance the chances of the people with the right skills,
> and the right amount of spare time, find the people with the right
> ideas, and the right use case. For example, you *really cannot buy* DRM
> receivers in Germany, I don't even know if any services exist in Europe.
> So it's kinda hard to guess what people use and not use in the real world :)
> So, this might be a bit of a general appeal to be like Rafael:
> If anyone uses GNU Radio and/or some OOT Modules in any application in
> this world, and they encounter wishes, please /do/ come to the
> discuss-gnuradio maling list and — discuss GNU Radio!
> I personally had a lot of fun over the years reading about cool
> applications of SDR technology, discussing them, helping users and devs
> where my limited experience allows and seeing people work together. As a
> recent example of that, I remember there was a receiver for endangered
> wildlife transponders that people discussed the design of the sync and
> whatnot. Was great fun! People were helped. (wonder what has come of
> that...)
> So, thanks!
> Marcus
> [1] https://wiki.gnuradio.org/index.php/GSoCIdeas ; make a new heading
> "Summer of Code 2018: Project idea list"; we'll sort the current ones to
> "old ideas" later on.
> On 08/18/2017 04:23 PM, Rafael Diniz wrote:
>> gr-drm is working fine, but there are some limitations (one audio
>> service only - MDI input support would fix this, only faac AAC LC
>> encoder, ...), and as far as I know, there are no open source ISDB-T
>> transmitter implementation. GSoC always help.
>> Rafael Diniz
>> On 08/18/2017 11:03 AM, Martin Braun wrote:
>>> On 08/18/2017 08:56 AM, Rafael Diniz wrote:
>>>> I wonder when we'll have a DRM app like this one. At least the mux and
>>>> codec part are very similar could be shared with DAB. May be next GSoC?
>>>> DRM and ISDB-T are the major wishes here from Brazil.
>>>> ; )
>>> I'm sure Luca and Felix would happily accept patches.
>>> -- M
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