Thread: HD Know More

(15 posts till I can post link... I am new here)It all started with buying a HDTV, reading hundreds (literally) web-pages and wikis, going through irritating packages and addons stuff I am pretty much f'ed up.

I found no topic discussing the HD stuff completely.
So here I share what I learned by reading, and I want to learn more so the people knowing more stuff please contribute.

WHAT IS HD? - h**p://en*wikipedia*org/wiki/High-definition_video

HDMI cable
First of all for those who don't know HDMI- h**p://en*wikipedia*org/wiki/HDMI

for those tl;dr
Its a cable you need to connect any media to send your HDTV the HD signals
So be it your new blu-ray player or ps3 or new DTH HD service
problem is they are f costly.

So if you had time to read it, I want to highlight your attention to this thing
h**p://i*imgur*com/OA5fM*jpg

As you can see there are different versions of HDMI cable
can anyone enlighten me over which version of cable different DTH HD providers give with the box (i have mailed airtel and tatasky, no response so far)

HD content (720p/1080p)
Bigger is NOT better UNLESS you have the right equipment.
details are good and loved by all, but wait, the eyes can limit you here.
Resolution, (if you remember your physics lessons) the capacity to resolve 2 pixels and see them distinct & clear is called resolution.
So you need a big screen for your eyes to resolve the picture properly.
cutting it short, for your eyes to see every detail being offered you need a

46" TV or greater for 720p
69" or greater for 1080p

I gave this info for those downloading HD stuff for lower screen size TV (including me)....save your space download 720p stuff :P

SOURCE -h**p://hdguru*com/lechner-distance-the-number-you-need-to-know-before-buying-an-hdtv/21/

Currently I am looking for good HD services at cheaper rates and I found MOST HD channels on Dish TV. Airtel has practically no HD content (xcept natgeo and matches live<and yes again i recall that 100% to airtel on 1 topic), i wonder why Reliance digital tv is even called hd (no channels found)

Will keep editing this post and post more, please contribute

*/Was away due to exams... continuing
@ Mods Can u please merge the following post with the 1st post?
and also wrap the url with words, links look untidy... Unable to edit my 1st post*/

1080i/720i and 1080p/720p

You may have seen this on hd ready TV or HD service providers saying picture in 1080i
Firstly lets see what 1080 is?
The 1080 is actually the number of pixels lined vertically down a row, now repeat these pixels 1920 times and you get the 1920x1080 which is obviously in ratio same as 16:9.

Now in 1080p (here p stands for progressive) all the pixels are shown at once. Thus you get superb picture clarity and that crisp video quality.
In 1080i (i for interlaced) All the pixels are not shown at a time. First half of the pixels are shown (by dropping alternate pixel lines, and at the next instance the other missing half are shown.
All these things take place fast and we can see one picture.

WHY 1080i? isn't 1080p better?
Definately 1080p is much better than 1080i, specially in fast moving scenes.
But the problem here is bandwidth. To send all the pixels together it costs a lot of bandwidth, seriously a lot. Whereas for 1080i it requires half of it. Eg you are needing 2mbps for 1080p you will need 1mbps to transfer the interlaced video, just an example not actual values...

Same is the case with 720p and 720i.
Example of a interlaced and where it lacks... also many people complain of ghosting etc...



Upscaling (Its a trap!)
Simply put, matching resolution. Filling the screen is what I would like to term it.
The upscaling process does a good job of matching the upscaled pixel output video to the native pixel display resolution of an HDTV. It provides better resolution and color.
So you can upscale DVD 480p to 1080p. But it is NOT TRUE HD, it will just have the HD resolution but not its quality.

IMP:- Many HD providers currently are upscaling content and calling it HD (dish TV seems to have mastered upscaling). But its not TURE HD (may they call it Tru).
It will never match the quality of NatGeo HD or Discovery HD World (which are TruE HD and not upscaled). So That sass bahu drama is still in dvd quality (they deserve it or even worse).
So beware and not to fall in the trap of upscaling.
Currently AFAIK there are just 2 HD channels Discovery HD world and Natgeo HD.

Good stuff. We have a section for such articles - it is "Home Appliances and Gadgets".

So you need a big screen for your eyes to resolve the picture properly.
cutting it short, for your eyes to see every detail being offered you need a

46" TV or greater for 720p
69" or greater for 1080p

I don't entirely agree on this point. I think human eye can distinguish the difference clearly even on a 32" TV. I have no scientific proof of course.

Originally Posted by just4kix

Good stuff. We have a section for such articles - it is "Home Appliances and Gadgets".
I don't entirely agree on this point. I think human eye can distinguish the difference clearly even on a 32" TV. I have no scientific proof of course.

Its easy, lets take an example
put a image of resolution anything bigger than the phones full screen resolution
say phones resolution is 400x680 (nexux-s) and you put a 1024x768 image(or higher)
you can see cornered edges while they should have been smoother, it looks as if things overlapped, now put the same image in the phones full screen resolution (400x680 in our example) and check the details again, corners will be smoother and all details will be properly perceived by your eyes

The same thing happens in TV, well depending on format quality
may be in a bd rip effect will be lesser but on a HQ bluray print it will be evident.


Ya there is a section agreed, but I also want to discuss what are providers giving.. I am very skeptic about the implication of HD because the masses are highly misinformed, many people happily take a HDTV home and get disappointed by quality, because they forget things like the HDMI cable etc or get bad quality of it.

Well, I watch original blu-ray discs only. I have observed distinct difference on 720p and 1080p.

Agree on the fact the most people get disappointed after taking their HD-TV (full or otherwise) home. In the stores they watch a BD source. That disc contains recording of brilliantly coloured houses from some European country (most likely Spain or some Medaterranian country). Each home has distict hues of blues, greens, yellows, reds, etc. People should always ask the salesman to demostrate normal TV source.

p/s. Moved the thread to proper section.

Blu Ray rocks and HD-DVD is kind of hard to find after 2008 all the studios went for Blu-Ray rather than Toshiba's HD-DVD.