Which is the richest video-format?

[Marione]

Hi guys, I’m new here, I’ve a very simple question: suppose that I’ve no space constraint, which is the richest video-format? (the format that when played shows me the best picture)
Based on my experience the HDTV is better than DVDrip; am I wrong?
What about HR HDTV?
What about sound quality?

Thankyou.

[mats.hogberg]

which is the richest video-format?

Whatever format the video was originally created in.

/Mats

[Marione]

which is the richest video-format?

Whatever format the video was originally created in.

/Mats

That is right! Shall I ask to the film producer?

[mats.hogberg]

Shall I ask to the film producer?

Yes, as that'd be the richest format, if we're talking about a movie. But maybe you can narrow the field down a bit, if that's not an option?

/Mats

[AlanHK]

Hi guys, I’m new here, I’ve a very simple question: suppose that I’ve no space constraint, which is the richest video-format? (the format that when played shows me the best picture)
Based on my experience the HDTV is better than DVDrip; am I wrong?
What about HR HDTV?

You need to state how you're going to play it. On what hardware and/or software.

[Marione]

Sorry, maybe the problem description was a little bit confused. I’m using my notebook to watch TV-movies and I just want to know which format is the richest anong DVDRip or HDTV or HR HDTV, 720p, or other strange acronyms …

[edDV]

Sorry, maybe the problem description was a little bit confused. I’m using my notebook to watch TV-movies and I just want to know which format is the richest anong DVDRip or HDTV or HR HDTV, 720p, or other strange acronyms …

Play on the laptop screen or to a HDTV? What is the laptop native display resolution and what is the maximum desktop size permitted? What is your graphics chipset? (or laptop model number?) If HDTV, what model number?


Also what are you watching DVD? HD broadcast rips?

[Squash]

@Marione,

I think you may be referring to "scene tags". If so, see here:

http://torrentfreak.com/p2p-tv-scene-tags/

If not, my apologies.

"Scene" questions should be taken to another forum. They are not discussed here.

[Marione]

@edDV: My laptop is an IBM thinkpad R51. Screen:15.4" with 1024x768 r4esolution.
@Squash: Thanks for the link.
But now the question is "is it better a DVDRip or a HR HDTV ?"
Which is the best forum to answer these questions?

Thanks

[Marione]

if HR HDTV = 960x540 and DVD= 720×480 than ... the winner is... HR HDTV

[mats.hogberg]

Not necessarily. Bitrate affects quality too:

Higher res, lower bitrate

Lower res, higher bitrate

/Mats

[edDV]

@edDV: My laptop is an IBM thinkpad R51. Screen:15.4" with 1024x768 r4esolution.
@Squash: Thanks for the link.
But now the question is "is it better a DVDRip or a HR HDTV ?"
Which is the best forum to answer these questions?

Thanks

Accorging to this site
http://reviews.cnet.com/laptops/lenovo-thinkpad-r51/4505-3121_7-30847902.html
the R51 was avaialble with either a 1024x768 or 1400x1050 screen. Grapghic chipset could be on board Intel 855 or most likely an ATI Mobility Radeon 7500 or 9000 graphics chips with 32MB of dedicated video memory.

Neither is wonderful with upscale so your best compromise picture would be HD 720p at a high bitrate (>16Mb/s MPeg2 or > 8Mb/s MPeg4) downscaled by the graphics chip from 1280x720 to 1024x576 (16x9 letterbox). 1080p @ 25Mb/s MPeg2 might look better but not by much. It too would be downscaled to 1024x576.

A standard DVD played at 854x480 will look sharp at 1x size and less sharp if upscaled (full screen mode) to 1024x576 letterbox.

[Marione]

1)I've the Ati 7500
2)the monitor does not support a resolution higher than 1024x768 (so, this is my maximum resolution when I'm not in the office where I'm an external, better, monitor)
3)I've learned that the HR HDTV is (still) upscaled on my notebook.
4) so my rank would be 720p hdtv, hr hdtv, dvd, tv. OK?
5)I never thought about the bit-rate, you are right but how can I check it? For example I've an HR HDTV video; is it possible that its bit-rate is 279kbps?(or i'm looking at the wrong data?) Can we say that the bit rate depends on standard but "in practice" it is:
a)number of picture per seconds
b)resolution of the picture

So in the previous image by mats.hogberg the "b" factor was low?

Thanks

[mats.hogberg]

On the site listing various "scene tags", HR HDTV is said to be typically ~700 MB for 45 min. That's makes about 1800 kbps video. DVD video can be max 9800 kbps. Now, HDTV may use a more efficient codec than DVD video - I really don't know.
In my example, I used a big still, first resized to 1/2 HR HDTV size, and saved out using a high compression (=low bitrate). Then took the same big image and resized to 1/2 DVD resolution, and saved out with low compression(=high bitrate).
I was just trying to point out that your blank statement that higher resolution=higher quality isn't true. Then comes bitrate (which has nothing to do with resolution and/or frames per second), then what codec is used... Simply too many variables - you must know them all to be able to tell which will be better than the other.
If quality is such a concern to you - your interest in the "scene" seems a little out of place, to be honest.
Just use your eyes to tell you what looks best to you. There will never be a universally true answer to this question.

/Mats

[Marvingj]

NASA has the best equipment for everything thats video, cameras the cost is Billions of our taxes each year...

[Marione]

@Marvingj Shall I ask them?
@mats.hogberg: I don't know a lot about codec but I surely did not know that also "fixed images" have bit rate In that case the rate is between what (if not seconds )?
Most tv scenes have picture as good as movies; hence I think it is my concern to ivestigate
Moreover, I agree that the best resolution is a subjective opinion but I was wondering about objective data(number of pixels, bitrate, etc, etc.)

Thanks for the help-

[mats.hogberg]

I surely did not know that also "fixed images" have bit rate

Well, bitrate is expressed as kbps (thousands of bits per second). Let's say you have a bit rate of 2500 kbps, and a frame rate of 25 fps, you have 100 kb for each frame/image; around 12.500 kB
JPG compression of stills work in a similar manner - by setting different compression rates, you in effect allocate a different amout of bytes for the image, and reduce the quality to fit. So, yes, even stills can be said to have a bit rate. If it's a big image (=high resolution) the quality has to be reduced more to fit the file size, than a smaller (lower resolution) image would have. Hence, a low res video get by with a lower bitrate. At a low enough bitrate, a low res image will actually look much better than a high res.
In a video, you can also allow for lower bitrates by lowering the frame rate (fewer images to share the bits each second).
But in my example, the lower res image actually has more than 3 times the bit rate compared to the high res. My point was simply that resolution is only one of many parameters that affect image/video quality.

/Mats

[Marione]

Now it sounds better

[edDV]

I guess I misunderstood your question. I thought you were asking for the best possible picture regardless of file size. I assumed you meant at consumer levels.

Hi guys, I’m new here, I’ve a very simple question: suppose that I’ve no space constraint, which is the richest video-format? (the format that when played shows me the best picture)
Based on my experience the HDTV is better than DVDrip; am I wrong?

SD
MPeg2 DVD 720x480i __ 6-8Mb/s for a qualiity DVD
MPeg2 DVD 720x480p 24 fps __ 4-8Mb/s
MPeg4 figure half the MPeg2 bit rate.

HD
MPeg2 DVD 1280x720p or 1920x1080i __ 15-25Mb/s
Mpeg2 DVD 1920x1080p 24 fps 18-25Mb/s
MPeg2 DVD 1280x720p 24 fps 8-14 Mb/s
MPeg4 figure half the MPeg2 bit rate.

Those are Mega bits per second.