True HD vs. Upconvert - What's the dif?

**nnicko** · 06-18-2004 09:36 AM

True HD vs. Upconvert - What's the dif?

Thanks!!

**Sean Mota** · 06-18-2004 09:37 AM

Originally Posted by nnicko

True HD vs. Upconvert - What's the dif?

Thanks!!

Look at TNT-HD --- that's upConvert.

**tdillon** · 06-18-2004 09:44 AM

Originally Posted by nnicko

True HD vs. Upconvert - What's the dif?

Thanks!!

True HD contains at least 4 times the video information in the signal and usually 3 times the audio information.

Upconvert is the same old NTSC lousy picture we have been looking at for the last 50 years.

When they (the upconverters) change the signal to HD, they often add editing to the original signal, either distorting the picture horizontally or chopping off the top and bottom of the picture in order to change from 4:3 aspect ratio to 16:9. Also, since the original content only had 400 lines of resolution, they are not magically creating the in-between lines to fill in the resolution, the data doesn't exist in the original signal and can't be created after the fact.

**nnicko** · 06-18-2004 09:59 AM

In other words, you mean that virtually ALL the movies they show on Cinema10 (and other channels) are not HD?? Isn't that a bit of false advertising by VOOM??

**wasch_24** · 06-18-2004 10:05 AM

Not true. The HD movies on the cinemas as well as the premiums are converted, or should I say cross-converted from the original source i.e. film. The original source has more resolution than HD does and therefore no information is "created" to fill the additional lines of resolution but rather information is discarded to create the HD presentation. Those HD transfers are actually down converts when compared to the original source. This is the same source material that the DVD is made from only it is transfered to 480 lines of resolution for the DVD.

**vurbano** · 06-18-2004 10:11 AM

The difference is that the source material was shot at HD resolution or higher. That is the difference. You can upconvert lesser resolution material all you want but you will not increase the details.

**Pete In Plano** · 06-18-2004 01:56 PM

And when converting film to HD, you use a HD camera in the filmchain to convert to video, thus getting all the information for all 1080 lines. Now, there are line doublers for upconversion that do create extra resolution lines, such as the Faroujda that Samsung DLP units have, that make the SD picture look a whole lot better, but nothing compares to true HD, shot with a HD camera with plenty of light. HD cameras needs a lot more light than the SD camera, notice how a golf picture gets a little fuzzy when it gets cloudy and dark. Discovery has a show on HD vs film and it said that HD needs more light than film for the utmost resolution, and much more light than SD. But, with the best HD setup, the HD actually looked better than the film in some cases.