broadcasting TV w/ mpeg2?

[statuspending]

here is a quote from http://www.offeryn.de/dv.htm

The technology is ready: We have got digital consumer cameras, TV station transmit their pictures in MPEG2, DVD players convert MPEG2 data in viewable movies.


broadcasting in mpeg 2??? i must be senile. is that what hdtv broadcasting is? or digital cable? or satellite? what's going on here!

if so, is there such a thing as a hdtv or digital tv-tuner card with which you merely write the mpeg2 to your hard drive as you receive it?

hardcore.

[Chopper Face]

Well it's obvious that some channels are using some sort of compression. If you pay close attention to new animation with a very clean source and clear colours and borders you can see that there's a certain amount of distortion around the lines similar to that seen with .jpg or .mpg encoding. At what stage this encoding takes place I don't know. Could just be part of the editing stage for some shows but it seems to be mostly on certain channels. Of course this is just what my eyes tell me so don't quote me on it.

[statuspending]

interesting. pre-broadcasting stage perhaps?

it makes sense to have mpeg files if they are computer-generated animation files.

as for me, i watch mainly history channel and scheduled movies from the analog cable line. thus, i never see these artifacts in anime. it would be neat to receive a digital broadcast and save it as such..

thanks

[Chopper Face]

That would be the ultimate. Nothing to encode. Just save and burn. Of course for that you'd have to have similar standards for your broadcast and whatever medium you're exporting to.

[patrickm]

satellite is generally 8Mbit/s MPEG-2. HDTV is MPEG-2 based as well.

they have a WinTV-D card that is a digital TV tuner/decoder for the PC. it doesn't just let you stream files to your disk though, at least not from anything i've heard.

[suspect]

<TABLE BORDER=0 ALIGN=CENTER WIDTH=85%><TR><TD><font size=-1>Quote:</font><HR size=1 color=black></TD></TR><TR><TD><FONT SIZE=-1><BLOCKQUOTE>
On 2001-07-03 10:21:08, statuspending wrote:
here is a quote from http://www.offeryn.de/dv.htm

The technology is ready: We have got digital consumer cameras, TV station transmit their pictures in MPEG2, DVD players convert MPEG2 data in viewable movies.


broadcasting in mpeg 2??? i must be senile. is that what hdtv broadcasting is? or digital cable? or satellite? what's going on here!

if so, is there such a thing as a hdtv or digital tv-tuner card with which you merely write the mpeg2 to your hard drive as you receive it?
</BLOCKQUOTE></FONT></TD></TR><TR><TD><HR size=1 color=black></TD></TR></TABLE>
http://www.hauppauge.co.uk/html/DVBs.htm
That card will do it. Don't know the availablity of the card though.

[rmac]

This is new but really interesting stuff that is just becoming available. I'd appreciate any input on it from the video veterans out there.

http://www.digitalconnection.com/products/video/adtv.htm

http://www.accessdtv.com/

http://howstuffworks.lycos.com/accessdtv.htm

[SatStorm]

If you are in europe, middle east Africa and some parts of asia, there is a way to grabb in realltime from satellite feeds!
You need a nokia d-box1,9500,9200,9600,9610 satellite receiver, DVB2000 firmware and a couple of related programs.
You can grab in realtime, and then demux and remux the generated mpg file as Svcd with tmpeg, and you have ready(x)svcd!
Or you can encode it to (x)vcd etc...

There is an alternative to all these:
There are some dvb/s cards for pcs, based on the same chipset. By using a very special firmware (dvblive!), you can grabb on the fly satellite transmitions.
There is the link: http://www.odsoft.org/ for more info
Hauppauge wintv/dvb/s is compatible with this program, but not win tv nova, the new cheaper card...

[AntnyMD]

True HDTV (err, ATSC HDTV) is of a higher resolution and higher bitrate than DVD, so if you were able to capture true HDTV digitally, the bitrate and resolution would exceed DVD specs and wouldn't play back in your DVD player without recompression.

[ktnwin]

I have seen a demo of HDTV, resolution is 1980x1280 MPEG-2 stream. I believe this is the highest resolution supported by HDTV (there are lower ones but still exceed DVD).

I am sure that powerful PC can plays MPEG-2 at this resolution (also at very very high bitrate) providing that the graphic card supports it.

[AntnyMD]

Also, high definition television and standard definition television come in a slightly different format than DVDs. DVDs contain MPEG-2 program streams; digital television is delivered via a transport stream, which is not understood on its own by DVD authoring programs.

Lets say you could obtain exact digital copies of current digital television transport streams. You seek to make an XDVD. Will your current standalone be compatible with an XDVD without recompression and/or demultiplex/remultiplex? Would not a simple analog recording onto DVD+RW at higher than SVCD bitrates suffice? Where will the quest for digital perfection end? When will we just sit back and enjoy video again?

(And can you imagine the short playing time of an XDVD? We'd be back in SVCD territory, on a 4.7gb medium!)


*sigh*

[patrickm]

<TABLE BORDER=0 ALIGN=CENTER WIDTH=85%><TR><TD><font size=-1>Quote:</font><HR size=1 color=black></TD></TR><TR><TD><FONT SIZE=-1><BLOCKQUOTE>
Lets say you could obtain exact digital copies of current digital television transport streams. You seek to make an XDVD. Will your current standalone be compatible with an XDVD without recompression and/or demultiplex/remultiplex? Would not a simple analog recording onto DVD+RW at higher than SVCD bitrates suffice? Where will the quest for digital perfection end? When will we just sit back and enjoy video again?

(And can you imagine the short playing time of an XDVD? We'd be back in SVCD territory, on a 4.7gb medium!)
</BLOCKQUOTE></FONT></TD></TR><TR><TD><HR size=1 color=black></TD></TR></TABLE>

true, but in some ways that's a weak argument. why do a dvd rip instead of an analog capture for a VCD? quality. why use SVCD over VCD? same reason. the goal is to lose as little in the conversion as possible. and i'd assume a re-encode of a transport stream would work at least as well transcoding to DVD bitrates than a 8Mbit MPEG-2 capture. and i don't think the quest will 'end' until we have the ability to match what is being given to us, and even then people will probably never quit...