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Re: Digital TV receiver on a chip

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From: pNaonStp...@yahoo.com (Jan Panteltje)
Newsgroups: sci.electronics.design
Subject: Re: Digital TV receiver on a chip
Date: Thu, 10 Feb 2022 16:12:15 GMT
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by: Jan Panteltje - Thu, 10 Feb 2022 16:12 UTC

On a sunny day (Thu, 10 Feb 2022 06:20:47 -0800 (PST)) it happened Wim Ton
<wim.ton@gmail.com> wrote in
<cc32d77c-4191-4e11-9f11-81c8bb8de934n@googlegroups.com>:

>The common dongles are just a direct conversion receiver and an AD converter. The rest of the processing must be done by the
>host.

That is not correct,
There are 2 chips in the dongles,
the second one, the RTL2832U, does full decoding to transport stream format,
but can be configured to output sequential IQ data.

So all you need in software then is parse the transport stream (simple) and a MPEG2 or whatever format decoder.
Most PCs have that already implemented in hardware, even Raspberry does that (I remember buying a decoder key for a few $
for the older model to activate the hardware MPEG2 decoder).
In fact the Raspberry chipset is original a TV chipset.

Not sure what my new RP4 has enabled as decoder, interesting thread here:
https://forums.raspberrypi.com/viewtopic.php?t=268356
Doing the HD playback in software on the Pi4 from things I recorded with my DVB-T2 and DVB-S2 boxes, was slow.

Many if not most rtl-sdr projects however configure the stick to only use the sequential IQ quadrature output,
such as my spectrum analyzer:
http://panteltje.com/panteltje/xpsa/index.html

I have never tried to receive digital TV with my sticks, I have Chinese made boxes that do that fine.
We moved to DVB-T2 recently here, and I had to buy a new Chinese TV box for that.

"How do I love thee? My accumulator overflows."

tech / sci.electronics.design / Re: Digital TV receiver on a chip

Subject	Author
Digital TV receiver on a chip	Sid 03
Re: Digital TV receiver on a chip	DecadentLinuxUserNumeroUno
Re: Digital TV receiver on a chip	Anthony William Sloman
Re: Digital TV receiver on a chip	Bob Engelhardt
Re: Digital TV receiver on a chip	Jan Panteltje
Re: Digital TV receiver on a chip	Don
Re: Digital TV receiver on a chip	Sid 03
Re: Digital TV receiver on a chip	Dave Platt
Re: Digital TV receiver on a chip	Clifford Heath
Re: Digital TV receiver on a chip	Dave Platt
Re: Digital TV receiver on a chip	Clifford Heath
Re: Digital TV receiver on a chip	Wim Ton
Re: Digital TV receiver on a chip	Jan Panteltje
Re:Digital TV receiver on a chip	Martin Rid
Re: Digital TV receiver on a chip	Phil Allison
Re: Digital TV receiver on a chip	Lasse Langwadt Christensen
Re: Digital TV receiver on a chip	Phil Allison
Re: Digital TV receiver on a chip	Rick C
Re: Digital TV receiver on a chip	whit3rd
Re: Digital TV receiver on a chip	Martin Brown
Re: Digital TV receiver on a chip	DecadentLinuxUserNumeroUno
Re: Digital TV receiver on a chip	LM
Re: Digital TV receiver on a chip	Don
Re: Digital TV receiver on a chip	Rick C
Re: Digital TV receiver on a chip	Jasen Betts
Re: Digital TV receiver on a chip	DecadentLinuxUserNumeroUno