• Digital TV receiver on a chip

    From Sid 03@21:1/5 to All on Tue Feb 8 05:43:38 2022
    Can someone recommend a chip that will allow a simple circuit to be built that will allow the user to tune in a local TV stations and listen to the Audio portion only. I know that most of the terrestrial TV stations have converted over to digital
    broadcasting, but does that include the audio signal ? Would it be that hard to build a small radio to listen to the audio portion ?

    Thanks

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  • From Anthony William Sloman@21:1/5 to sidw...@gmail.com on Tue Feb 8 06:13:57 2022
    On Wednesday, February 9, 2022 at 12:43:46 AM UTC+11, sidw...@gmail.com wrote:
    Can someone recommend a chip that will allow a simple circuit to be built that will allow the user to tune in a local TV stations and listen to the Audio portion only. I know that most of the terrestrial TV stations have converted over to digital
    broadcasting, but does that include the audio signal ? Would it be that hard to build a small radio to listen to the audio portion ?

    It's probably an unrealistric ambition. The processing schemes that compress the television signal - video and audio - into a very fast digital bit stream are remarkably complicated and entirely digital, and the decoding process that corrects some of the
    errors that creep in is pretty complicated too.

    Look at the kind of TV sound and image you get during a thunderstorm, when the error correction gets over-loaded.

    It all works because you can make lots of complicated high performance special purpose integrated circuits remarkably cheaply, but only for that one special purpose.

    --
    Bill Sloman, Sydney

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  • From DecadentLinuxUserNumeroUno@decadenc@21:1/5 to sidwelle@gmail.com on Tue Feb 8 14:02:40 2022
    Sid 03 <sidwelle@gmail.com> wrote in news:6bf69509-6a30-45a5-b1f0-0d2a4b82926en@googlegroups.com:

    Can someone recommend a chip that will allow a simple circuit to
    be built that will allow the user to tune in a local TV stations
    and listen to the Audio portion only. I know that most of the
    terrestrial TV stations have converted over to digital
    broadcasting, but does that include the audio signal ? Would it
    be that hard to build a small radio to listen to the audio portion
    ?

    Thanks


    The digital transmissions carry the program audio digitized as well.
    You would only be able to get TV stations that still also broadcast
    analog, but I do not think there are any in the US any longer.

    There were multi-band radio recievers back in the '60s and up that
    had multiple bands and many also had the TV broadcast band in them as
    well.

    But no... no signals... and no, no chip.

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  • From Bob Engelhardt@21:1/5 to All on Tue Feb 8 09:47:26 2022
    How about an ota converter box? E.g.: https://www.amazon.com/gp/product/B08WWTS9FJ/ref=ask_ql_qh_dp_hza

    For $25 you can save yourself the work and have a bunch of features that
    you won't use :-)

    --- SoupGate-Win32 v1.05
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  • From Jan Panteltje@21:1/5 to sidwelle@gmail.com on Tue Feb 8 15:22:20 2022
    On a sunny day (Tue, 8 Feb 2022 05:43:38 -0800 (PST)) it happened Sid 03 <sidwelle@gmail.com> wrote in <6bf69509-6a30-45a5-b1f0-0d2a4b82926en@googlegroups.com>:

    Can someone recommend a chip that will allow a simple circuit to be built that >will allow the user to tune in a local TV stations and listen to the Audio >portion only. I know that most of the terrestrial TV stations have converted
    over to digital broadcasting, but does that include the audio signal
    ? Would it be that hard to build a small radio to listen to the audio portion >?

    Thanks

    Type in google:
    ebay digital usb tv stick

    first hit:
    https://www.ebay.com/itm/304053461399
    looks like European standard, US may need a different one.

    That said, I have several rtl-sdr sticks that are in essence digital TV decoders
    but can be used for a wide spectrum of applications with the right software.
    https://www.ebay.com/itm/272411458376

    my spectrum analyzer uses that thing:
    http://panteltje.com/panteltje/xpsa/index.html
    and has radio too (new version has FM stereo too).

    Lots of software and projects with it:
    https://www.rtl-sdr.com/

    more:
    https://www.rtl-sdr.com/big-list-rtl-sdr-supported-software/

    Inside, actually 2 chips:
    https://www.rtl-sdr.com/wp-content/uploads/2020/02/improvements_v3new800x800.jpg?ffccfa&ffccfa

    For the money a small miracle.

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  • From Martin Rid@21:1/5 to sidwelle@gmail.com on Tue Feb 8 10:56:37 2022
    Sid 03 <sidwelle@gmail.com> Wrote in message:r
    Can someone recommend a chip that will allow a simple circuit to be built that will allow the user to tune in a local TV stations and listen to the Audio portion only. I know that most of the terrestrial TV stations have converted over to digital
    broadcasting, but does that include the audio signal ? Would it be that hard to build a small radio to listen to the audio portion ?Thanks

    Very complicated. I'd buy a small portable TV, like the old
    haier. But make sure its atsc 3.0

    Cheers
    --


    ----Android NewsGroup Reader---- https://piaohong.s3-us-west-2.amazonaws.com/usenet/index.html

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  • From Phil Allison@21:1/5 to sidw...@gmail.com on Tue Feb 8 10:40:11 2022
    sidw...@gmail.com wrote:
    =====================

    Can someone recommend a chip that will allow a simple circuit to be built that will allow
    the user to tune in a local TV stations and listen to the Audio portion only.

    ** No such thing exists.


    I know that most of the terrestrial TV stations have converted over to digital broadcasting,
    but does that include the audio signal ?

    ** You bet it does. Fully digital in multi channel too.

    Would it be that hard to build a small radio to listen to the audio portion ?

    ** A "set top box" will do what you ask.
    Converts the digital TV signal back to analogue video and stereo audio.
    Should be able to get a used one for next to nothing.



    ...... Phil

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  • From LM@21:1/5 to All on Tue Feb 8 20:43:25 2022
    On Tue, 8 Feb 2022 05:43:38 -0800 (PST), Sid 03 <sidwelle@gmail.com>
    wrote:

    Can someone recommend a chip that will allow a simple circuit to be built that will allow the user to tune in a local TV stations and listen to the Audio portion only. I know that most of the terrestrial TV stations have converted over to digital
    broadcasting, but does that include the audio signal ? Would it be that hard to build a small radio to listen to the audio portion ?

    Thanks
    What is the name of Digi TV modulation. There are chips that modulate
    video and audio to Digi Tv. So, sure there demodulator chips also.
    Chip in RTL dongle?

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  • From Lasse Langwadt Christensen@21:1/5 to All on Tue Feb 8 11:14:48 2022
    tirsdag den 8. februar 2022 kl. 19.40.20 UTC+1 skrev palli...@gmail.com:
    sidw...@gmail.com wrote:
    =====================

    Can someone recommend a chip that will allow a simple circuit to be built that will allow
    the user to tune in a local TV stations and listen to the Audio portion only.
    ** No such thing exists.
    I know that most of the terrestrial TV stations have converted over to digital broadcasting,
    but does that include the audio signal ?
    ** You bet it does. Fully digital in multi channel too.
    Would it be that hard to build a small radio to listen to the audio portion ?
    ** A "set top box" will do what you ask.
    Converts the digital TV signal back to analogue video and stereo audio. Should be able to get a used one for next to nothing.

    it would work, but I'm not sure how easy it is to control without a display

    --- SoupGate-Win32 v1.05
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  • From Phil Allison@21:1/5 to lang...@fonz.dk on Tue Feb 8 11:34:54 2022
    lang...@fonz.dk wrote:
    ==================

    Would it be that hard to build a small radio to listen to the audio portion ?
    ** A "set top box" will do what you ask.
    Converts the digital TV signal back to analogue video and stereo audio. Should be able to get a used one for next to nothing.

    it would work, but I'm not sure how easy it is to control without a display


    ** True - the OP's question is rather nutty.
    Probably wants portable and battery operated too.

    The name of this NG attracts many such narcissists.


    ..... Phil

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  • From Don@21:1/5 to All on Tue Feb 8 19:40:45 2022
    LM wrote:
    Sid 03 wrote:

    Can someone recommend a chip that will allow a simple circuit to be built >>that will allow the user to tune in a local TV stations and listen to the >>Audio portion only. I know that most of the terrestrial TV stations >>have converted over to digital broadcasting, but does that include the >>audio signal ? Would it be that hard to build a small radio to listen
    to the audio portion ?

    Thanks
    What is the name of Digi TV modulation. There are chips that modulate
    video and audio to Digi Tv. So, sure there demodulator chips also.
    Chip in RTL dongle?

    Great minds... Although RTL-SDR's original purpose was to watch DVB-T,
    it's unknown to me how well it functions with ATSC:

    https://duckduckgo.com/?q=atsc+rtl-sdr

    Danke,

    --
    Don, KB7RPU, https://www.qsl.net/kb7rpu
    There was a young lady named Bright Whose speed was far faster than light;
    She set out one day In a relative way And returned on the previous night.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Rick C@21:1/5 to palli...@gmail.com on Tue Feb 8 15:13:51 2022
    On Tuesday, February 8, 2022 at 2:35:01 PM UTC-5, palli...@gmail.com wrote:
    lang...@fonz.dk wrote:
    ==================

    Would it be that hard to build a small radio to listen to the audio portion ?
    ** A "set top box" will do what you ask.
    Converts the digital TV signal back to analogue video and stereo audio. Should be able to get a used one for next to nothing.

    it would work, but I'm not sure how easy it is to control without a display

    ** True - the OP's question is rather nutty.
    Probably wants portable and battery operated too.

    The name of this NG attracts many such narcissists.

    I actually laugh out loud at some of your posts. This was funny in multiple ways. First was the idea that because this guy wants something you can't appreciate, he must be a "narcissist". Then there is the fact of it being a bit of the pot calling the
    kettle black.

    You are too much sometimes!

    --

    Rick C.

    - Get 1,000 miles of free Supercharging
    - Tesla referral code - https://ts.la/richard11209

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  • From Rick C@21:1/5 to Don on Tue Feb 8 15:19:07 2022
    On Tuesday, February 8, 2022 at 2:40:55 PM UTC-5, Don wrote:
    LM wrote:
    Sid 03 wrote:

    Can someone recommend a chip that will allow a simple circuit to be built >>that will allow the user to tune in a local TV stations and listen to the >>Audio portion only. I know that most of the terrestrial TV stations
    have converted over to digital broadcasting, but does that include the >>audio signal ? Would it be that hard to build a small radio to listen
    to the audio portion ?

    Thanks
    What is the name of Digi TV modulation. There are chips that modulate video and audio to Digi Tv. So, sure there demodulator chips also.
    Chip in RTL dongle?
    Great minds... Although RTL-SDR's original purpose was to watch DVB-T,
    it's unknown to me how well it functions with ATSC:

    https://duckduckgo.com/?q=atsc+rtl-sdr

    If he actually wants to listen to shows over the air using an antenna then yeah, something that will receive the signal and convert it would be needed. If he just wants to listen to the shows, period, then he can possibly use pretty much any small,
    cheap computer to view it over the Internet. Many shows are available that way and a small computer is much handier than an old TV. I suppose a Raspberry Pi could be used for this and run off of Phil's battery.

    --

    Rick C.

    + Get 1,000 miles of free Supercharging
    + Tesla referral code - https://ts.la/richard11209

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  • From Don@21:1/5 to Jan Panteltje on Tue Feb 8 23:37:17 2022
    Jan Panteltje wrote:
    Sid 03 wrote:

    Can someone recommend a chip that will allow a simple circuit to be built that
    will allow the user to tune in a local TV stations and listen to the Audio >>portion only. I know that most of the terrestrial TV stations have converted
    over to digital broadcasting, but does that include the audio signal
    ? Would it be that hard to build a small radio to listen to the audio portion
    ?

    Thanks

    Type in google:
    ebay digital usb tv stick

    first hit:
    https://www.ebay.com/itm/304053461399
    looks like European standard, US may need a different one.

    That said, I have several rtl-sdr sticks that are in essence digital TV decoders
    but can be used for a wide spectrum of applications with the right software.
    https://www.ebay.com/itm/272411458376

    my spectrum analyzer uses that thing:
    http://panteltje.com/panteltje/xpsa/index.html
    and has radio too (new version has FM stereo too).

    Lots of software and projects with it:
    https://www.rtl-sdr.com/

    more:
    https://www.rtl-sdr.com/big-list-rtl-sdr-supported-software/

    Inside, actually 2 chips:
    https://www.rtl-sdr.com/wp-content/uploads/2020/02/improvements_v3new800x800.jpg?ffccfa&ffccfa

    For the money a small miracle.

    Great minds again... Somehow your follow up was overlooked by me until
    now. ATSC compatibility still seems somewhat problematic.
    Your first link says it supports DVB-T2, DVB-T, DVB-C, and the
    VHF-/UHF band. But it doesn't support ATSC. It's hard for me to
    understand why anyone in the USA would buy it, even if it's "USA stock"
    with free shipping. :)

    Danke,

    --
    Don, KB7RPU, https://www.qsl.net/kb7rpu
    There was a young lady named Bright Whose speed was far faster than light;
    She set out one day In a relative way And returned on the previous night.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Sid 03@21:1/5 to Don on Tue Feb 8 20:12:06 2022
    On Tuesday, February 8, 2022 at 5:37:28 PM UTC-6, Don wrote:
    Jan Panteltje wrote:
    Sid 03 wrote:

    Can someone recommend a chip that will allow a simple circuit to be built that
    will allow the user to tune in a local TV stations and listen to the Audio >>portion only. I know that most of the terrestrial TV stations have converted
    over to digital broadcasting, but does that include the audio signal
    ? Would it be that hard to build a small radio to listen to the audio portion
    ?

    Thanks

    Type in google:
    ebay digital usb tv stick

    first hit:
    https://www.ebay.com/itm/304053461399
    looks like European standard, US may need a different one.

    That said, I have several rtl-sdr sticks that are in essence digital TV decoders
    but can be used for a wide spectrum of applications with the right software.
    https://www.ebay.com/itm/272411458376

    my spectrum analyzer uses that thing: http://panteltje.com/panteltje/xpsa/index.html
    and has radio too (new version has FM stereo too).

    Lots of software and projects with it:
    https://www.rtl-sdr.com/

    more:
    https://www.rtl-sdr.com/big-list-rtl-sdr-supported-software/

    Inside, actually 2 chips: https://www.rtl-sdr.com/wp-content/uploads/2020/02/improvements_v3new800x800.jpg?ffccfa&ffccfa

    For the money a small miracle.
    Great minds again... Somehow your follow up was overlooked by me until
    now. ATSC compatibility still seems somewhat problematic.
    Your first link says it supports DVB-T2, DVB-T, DVB-C, and the
    VHF-/UHF band. But it doesn't support ATSC. It's hard for me to
    understand why anyone in the USA would buy it, even if it's "USA stock"
    with free shipping. :)
    Danke,

    --
    Don, KB7RPU, https://www.qsl.net/kb7rpu
    There was a young lady named Bright Whose speed was far faster than light; She set out one day In a relative way And returned on the previous night.

    Jan, one of the USB sticks might work. I would like to find one that I could control w/Arduino or something small.
    Thanks

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  • From Martin Brown@21:1/5 to Lasse Langwadt Christensen on Wed Feb 9 11:57:08 2022
    On 08/02/2022 19:14, Lasse Langwadt Christensen wrote:
    tirsdag den 8. februar 2022 kl. 19.40.20 UTC+1 skrev palli...@gmail.com:
    sidw...@gmail.com wrote:
    =====================

    Can someone recommend a chip that will allow a simple circuit to be built that will allow
    the user to tune in a local TV stations and listen to the Audio portion only.
    ** No such thing exists.
    I know that most of the terrestrial TV stations have converted over to digital broadcasting,
    but does that include the audio signal ?
    ** You bet it does. Fully digital in multi channel too.
    Would it be that hard to build a small radio to listen to the audio portion ?
    ** A "set top box" will do what you ask.
    Converts the digital TV signal back to analogue video and stereo audio.
    Should be able to get a used one for next to nothing.

    it would work, but I'm not sure how easy it is to control without a display

    A USB TV stick to implement an SDR would be my choice.
    Then it is just a SMOP. Maybe a toy Linux version. eg

    https://airspy.com/download/

    (not a recommendation - never tried that one)

    --
    Regards,
    Martin Brown

    --- SoupGate-Win32 v1.05
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  • From Jasen Betts@21:1/5 to sidwelle@gmail.com on Wed Feb 9 11:10:16 2022
    On 2022-02-08, Sid 03 <sidwelle@gmail.com> wrote:
    Can someone recommend a chip that will allow a simple circuit to be
    built that will allow the user to tune in a local TV stations and
    listen to the Audio portion only.

    Not any more, local tv is digital now. buy a tv dongle and plug it
    into a computer then set up the software.

    I know that most of the
    terrestrial TV stations have converted over to digital broadcasting,
    but does that include the audio signal ?

    Yes but it's part of the digital signal. the audio portion is
    MPEG1,MPEG3,AVC - a digital signal.

    Would it be that hard to build a small radio to listen to the audio portion ?

    Use a small computer.

    --
    Jasen.

    --- SoupGate-Win32 v1.05
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  • From DecadentLinuxUserNumeroUno@decadenc@21:1/5 to Martin Brown on Wed Feb 9 15:04:56 2022
    Martin Brown <'''newspam'''@nonad.co.uk> wrote in news:su0a6s$1e9v$2@gioia.aioe.org:

    On 08/02/2022 19:14, Lasse Langwadt Christensen wrote:
    tirsdag den 8. februar 2022 kl. 19.40.20 UTC+1 skrev
    palli...@gmail.com:
    sidw...@gmail.com wrote:
    =====================

    Can someone recommend a chip that will allow a simple circuit
    to be built that will allow the user to tune in a local TV
    stations and listen to the Audio portion only.
    ** No such thing exists.
    I know that most of the terrestrial TV stations have converted
    over to digital broadcasting, but does that include the audio
    signal ?
    ** You bet it does. Fully digital in multi channel too.
    Would it be that hard to build a small radio to listen to the
    audio portion ?
    ** A "set top box" will do what you ask.
    Converts the digital TV signal back to analogue video and stereo
    audio. Should be able to get a used one for next to nothing.

    it would work, but I'm not sure how easy it is to control without
    a display

    A USB TV stick to implement an SDR would be my choice.
    Then it is just a SMOP. Maybe a toy Linux version. eg

    https://airspy.com/download/

    (not a recommendation - never tried that one)


    There are SDR outfits out there, but they are NOT QAM or HDTV
    recievers inasmuch as they do not have the processor for it in them.

    There are dedicated HDTV tuners which are in the form of a USB
    stick. Albeit a bit large. <https://www.amazon.com/AVerMedia-Supports-Windows-Android-
    H837/dp/B006PU81QE>

    --- SoupGate-Win32 v1.05
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  • From DecadentLinuxUserNumeroUno@decadenc@21:1/5 to Jasen Betts on Wed Feb 9 15:00:06 2022
    Jasen Betts <usenet@revmaps.no-ip.org> wrote in news:su07eo$c18$1@gonzo.revmaps.no-ip.org:

    On 2022-02-08, Sid 03 <sidwelle@gmail.com> wrote:
    Can someone recommend a chip that will allow a simple circuit to
    be built that will allow the user to tune in a local TV stations
    and listen to the Audio portion only.

    Not any more, local tv is digital now. buy a tv dongle and plug it
    into a computer then set up the software.

    I know that most of the
    terrestrial TV stations have converted over to digital
    broadcasting, but does that include the audio signal ?

    Yes but it's part of the digital signal. the audio portion is
    MPEG1,MPEG3,AVC - a digital signal.

    Would it be that hard to build a small radio to listen to the
    audio portion ?

    Use a small computer.


    https://www.amazon.com/AVerMedia-Supports-Windows-Android-
    H837/dp/B006PU81QE

    It also tunes analog FM.

    --- SoupGate-Win32 v1.05
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  • From whit3rd@21:1/5 to palli...@gmail.com on Wed Feb 9 10:35:19 2022
    On Tuesday, February 8, 2022 at 11:35:01 AM UTC-8, palli...@gmail.com wrote:
    lang...@fonz.dk wrote:
    ==================

    Would it be that hard to build a small radio to listen to the audio portion ?
    ** A "set top box" will do what you ask.

    it would work, but I'm not sure how easy it is to control without a display

    ** True - the OP's question is rather nutty.
    Probably wants portable and battery operated too.

    There's plugins for tablets and OTG cellphones that would work (give picture
    as well as audio, for that matter).

    <https://www.amazon.com/heaven2017-Receiver-Android-Tablet-Digital/dp/B082YTPNCD/ref=sr_1_4>

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Dave Platt@21:1/5 to sidwelle@gmail.com on Wed Feb 9 11:39:49 2022
    In article <14f9f4d3-3850-4ba2-a6db-3b92043086bfn@googlegroups.com>,
    Sid 03 <sidwelle@gmail.com> wrote:

    Jan, one of the USB sticks might work. I would like to find one that
    I could control w/Arduino or something small.

    The RTL-SDR dongles won't work with ATSC television. They don't have
    the RF bandwidth - they can only receive a 2.8 MHz "slice" of the
    VHF/UHF spectrum, and ATSC uses the same 6 MHz RF channel spacing (and
    nearly that much actual bandwidth) that the old NTSC analog TV signals
    did.

    There are other SDR devices which can receive a wide-enough slice of
    RF to handle ATSC.

    The dongles also aren't full "receivers" for any specific type of
    signal modulation. They simply filter and downsample and digitize the
    RF, and send it over USB to the PC (or tablet). It's up to the PC or
    phone or tablet to do all of the signal demodulation and the decoding,
    and this can take quite a bit of CPU horsepower. ATSC demodulation
    and decoding would take much more "oomph" than any Arduino-class
    processor I know of.

    I've read of people successfully implementing an ATSC receiver
    using an SDR dongle, paired with GNURadio and a suitable
    signal-processing flow graph. Doing so apparently took a pretty
    fast multi-core PC.

    Decoding only the ATSC audio signal would probably be a good deal
    easier (maybe by half) since one could simply discard the video
    portions of the data stream after demodulation.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Clifford Heath@21:1/5 to Dave Platt on Thu Feb 10 07:51:50 2022
    On 10/2/22 6:39 am, Dave Platt wrote:
    In article <14f9f4d3-3850-4ba2-a6db-3b92043086bfn@googlegroups.com>,
    Sid 03 <sidwelle@gmail.com> wrote:

    Jan, one of the USB sticks might work. I would like to find one that
    I could control w/Arduino or something small.

    The RTL-SDR dongles won't work with ATSC television. They don't have
    the RF bandwidth - they can only receive a 2.8 MHz "slice" of the
    VHF/UHF spectrum, and ATSC uses the same 6 MHz RF channel spacing (and
    nearly that much actual bandwidth) that the old NTSC analog TV signals
    did.

    There are other SDR devices which can receive a wide-enough slice of
    RF to handle ATSC.

    The dongles also aren't full "receivers" for any specific type of
    signal modulation. They simply filter and downsample and digitize the
    RF, and send it over USB to the PC (or tablet). It's up to the PC or
    phone or tablet to do all of the signal demodulation and the decoding,
    and this can take quite a bit of CPU horsepower. ATSC demodulation
    and decoding would take much more "oomph" than any Arduino-class
    processor I know of.

    I've read of people successfully implementing an ATSC receiver
    using an SDR dongle, paired with GNURadio and a suitable
    signal-processing flow graph. Doing so apparently took a pretty
    fast multi-core PC.

    Decoding only the ATSC audio signal would probably be a good deal
    easier (maybe by half) since one could simply discard the video
    portions of the data stream after demodulation.

    What have you been smoking?

    The dongles are full digital TV receivers, and do have the full
    bandwidth needed to do that. Using them as an SDR merely bypasses the
    decoder, grabbing up to half the available data because that's all the
    chip can stuff into a USB stream.

    With the right software (that they are sold with) you can watch TV
    without any SDR software.

    CH

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Dave Platt@21:1/5 to no.spam@please.net on Wed Feb 9 14:44:33 2022
    In article <16d2396361e44c8d$1$3741208$64dd6e6a@news.thecubenet.com>,
    Clifford Heath <no.spam@please.net> wrote:

    What have you been smoking?

    Misinformation, apparently. Thanks, I stand corrected! I'd only
    used them in the SDR mode.

    The dongles are full digital TV receivers, and do have the full
    bandwidth needed to do that. Using them as an SDR merely bypasses the >decoder, grabbing up to half the available data because that's all the
    chip can stuff into a USB stream.

    With the right software (that they are sold with) you can watch TV
    without any SDR software.

    Are there any which actually decode all the way to the HDMI video level,
    or is their output the MPEG digital stream (which would then require either software or GPU or dedicated-MPEG decode to go to the monitor)?

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Clifford Heath@21:1/5 to Dave Platt on Thu Feb 10 10:59:09 2022
    On 10/2/22 9:44 am, Dave Platt wrote:
    In article <16d2396361e44c8d$1$3741208$64dd6e6a@news.thecubenet.com>, Clifford Heath <no.spam@please.net> wrote:

    What have you been smoking?

    Misinformation, apparently. Thanks, I stand corrected! I'd only
    used them in the SDR mode.

    The dongles are full digital TV receivers, and do have the full
    bandwidth needed to do that. Using them as an SDR merely bypasses the
    decoder, grabbing up to half the available data because that's all the
    chip can stuff into a USB stream.

    With the right software (that they are sold with) you can watch TV
    without any SDR software.

    Are there any which actually decode all the way to the HDMI video level,
    or is their output the MPEG digital stream (which would then require either software or GPU or dedicated-MPEG decode to go to the monitor)?

    You're probably right about HDMI, but smart TVs accept compressed video
    streams from a DLNA server, so there's that.

    I suspect the dongles decode the transport stream and leave the rest to
    the driver software. But who knows, it's closed source, shrug!

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Wim Ton@21:1/5 to Clifford Heath on Thu Feb 10 06:20:47 2022
    On Wednesday, 9 February 2022 at 21:52:05 UTC+1, Clifford Heath wrote:
    On 10/2/22 6:39 am, Dave Platt wrote:
    In article <14f9f4d3-3850-4ba2...@googlegroups.com>,
    Sid 03 <sidw...@gmail.com> wrote:

    Jan, one of the USB sticks might work. I would like to find one that
    I could control w/Arduino or something small.

    The RTL-SDR dongles won't work with ATSC television. They don't have
    the RF bandwidth - they can only receive a 2.8 MHz "slice" of the
    VHF/UHF spectrum, and ATSC uses the same 6 MHz RF channel spacing (and nearly that much actual bandwidth) that the old NTSC analog TV signals
    did.

    There are other SDR devices which can receive a wide-enough slice of
    RF to handle ATSC.

    The dongles also aren't full "receivers" for any specific type of
    signal modulation. They simply filter and downsample and digitize the
    RF, and send it over USB to the PC (or tablet). It's up to the PC or
    phone or tablet to do all of the signal demodulation and the decoding,
    and this can take quite a bit of CPU horsepower. ATSC demodulation
    and decoding would take much more "oomph" than any Arduino-class
    processor I know of.

    I've read of people successfully implementing an ATSC receiver
    using an SDR dongle, paired with GNURadio and a suitable
    signal-processing flow graph. Doing so apparently took a pretty
    fast multi-core PC.

    Decoding only the ATSC audio signal would probably be a good deal
    easier (maybe by half) since one could simply discard the video
    portions of the data stream after demodulation.
    What have you been smoking?

    The dongles are full digital TV receivers, and do have the full
    bandwidth needed to do that. Using them as an SDR merely bypasses the decoder, grabbing up to half the available data because that's all the
    chip can stuff into a USB stream.

    With the right software (that they are sold with) you can watch TV
    without any SDR software.

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

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Jan Panteltje@21:1/5 to wim.ton@gmail.com on Thu Feb 10 16:12:15 2022
    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.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)