Some questions about HD Content

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raksrules

raksrules

Oracle
Sorry for posting this query here. Dont know the appropriate section.

I have a few queries related to HD content

I know that HD content as of date is termed as either 720p or 1080p (1080i is also there).
1. If i have a say 46" LCD TV capable of Full HD display. If i have two copies of a single movie say one is 720p (1280x720) and another 1080p (1920x1080).
Is is like if i see the 1080p on my TV then it will fill the entire screen and no black bars will come and if a 720p is seen i will see black bars ?

2. Will i as a non-videophile be able to differentiate between a 720p and 1080p video on a big screen (46" types) TV ?

3. If yes then what difference will i perceive when i watch that stuff ?

4. Are H264 codec combined with MKV container the best mix for HD content ?

5. For the above combination what sort of codec is used for audio and is it most of the time 6 channel sound ?
 
raksrules said:
Sorry for posting this query here. Dont know the appropriate section.

I have a few queries related to HD content

I know that HD content as of date is termed as either 720p or 1080p (1080i is also there).

1. If i have a say 46" LCD TV capable of Full HD display. If i have two copies of a single movie say one is 720p (1280x720) and another 1080p (1920x1080).

Is is like if i see the 1080p on my TV then it will fill the entire screen and no black bars will come and if a 720p is seen i will see black bars ?

Nope nothing like that. 720 or 1080 refer to Resolution of the frame being rendered. In simple terms it is 720 horizontal lines and 1080 horizontal lines per image.

The black bars issue has to do with the aspect ratio. The displays we have today (Barring the Philips 21:9 ambilight) are 16:9. The movies are typically shot/published as 1.85:1 and 2.39:1 hence the black bars on a 16:9 display.

2. Will i as a non-videophile be able to differentiate between a 720p and 1080p video on a big screen (46" types) TV ?

Not quite, some moving images the difference is observable but that too isn't too obvious.

3. If yes then what difference will i perceive when i watch that stuff ?

Some loss of detail in moving images' borders.

4. Are H264 codec combined with MKV container the best mix for HD content ?

There is nothing BEST apart from lossless content.

5. For the above combination what sort of codec is used for audio and is it most of the time 6 channel sound ?

The MKV container will typically have more than one audio track, some peolpe are wise enough to include the masterHD as well as ac3/dts track. Some even add an additional stereo track. The answer is depends who is preparing the mkv and how he wants it.
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One thing to add to Sarang's excellent post is the viewing distance.

If you are going to view it from real close, then maybe you'd perceived a minor difference in quality. At regular distances (approx over > 8 ft) you'd be hard pressed to perceive any visual difference 99% of the times (assuming that you, like me, are a non-videophile)
 
I don't know what a non-videophile is, but differences between 720p and 1080p are clearly visible on a 46" full HD LCD to me and my friends even at regular viewing distances.
 
it also depends on ur source.

there are 720p Dark Knight which has a size of 4GB, 8GB ,12GB on the net.
 
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