HDTV Information A Must
 

HDTV Samples 1920 X 1080i

visit www.atmorgen.com

Download Samples, If you are a HDTV Movie Fan this site is a must.

"tomtawny" wrote in message
...

HDTV Samples 1920 X 1080i

Actually they're really 960 columns interpolated to 1920 and the colour is
probably only 480 by 540.


visit www.atmorgen.com

Download Samples, If you are a HDTV Movie Fan this site is a must.


--
tomtawny

"Agamemnon" wrote in message
...

"tomtawny" wrote in message
...

HDTV Samples 1920 X 1080i

Actually they're really 960 columns interpolated to 1920 and the colour is
probably only 480 by 540.


I also downloaded and thought: eh - something not right here

Not quite a must after all, then

Tricky

"Tricky Dicky" wrote in message
...

"Agamemnon" wrote in message
...

"tomtawny" wrote in message
...

HDTV Samples 1920 X 1080i

Actually they're really 960 columns interpolated to 1920 and the colour
is probably only 480 by 540.


I also downloaded and thought: eh - something not right here

Not quite a must after all, then

Nearly all so-called HDTV content is of that standard or worse (720 lines).
I doubt you'll find 1080 line colour broadcast anywhere and you'll only get
1920 x 1080 non anamorphic widescreen with full 1920 x 1080 colour
resolution in a professional TV studio. In fact with a colour resolution of
480 by 540 HDTV is technically worse than standard TV recorded on D1 at 768
x 576 resolution. I bet you won't see many programmes where the characters
are wearing brightly coloured thin pin stipend shirts.


Tricky

Agamemnon wrote:
Nearly all so-called HDTV content is of that standard or worse (720
lines). I doubt you'll find 1080 line colour broadcast anywhere and
you'll only get 1920 x 1080 non anamorphic widescreen with full 1920 x
1080 colour resolution in a professional TV studio. In fact with a
colour resolution of 480 by 540 HDTV is technically worse than standard
TV recorded on D1 at 768 x 576 resolution. I bet you won't see many
programmes where the characters are wearing brightly coloured thin pin
stipend shirts.

Where did 540x480 come from? At 4:2:0 chroma sub-sampling 1920x1080 has
a colour resolution of 960x540. Given that standard definition digital
TV also uses 4:2:0 this is an improvement. I appreciate that up to 4:4:4
is used in studios, but the human eye is still better at resolving
luminance than chrominance.

"Ben" wrote in message
...
Agamemnon wrote:
Nearly all so-called HDTV content is of that standard or worse (720
lines). I doubt you'll find 1080 line colour broadcast anywhere and
you'll only get 1920 x 1080 non anamorphic widescreen with full 1920 x
1080 colour resolution in a professional TV studio. In fact with a colour
resolution of 480 by 540 HDTV is technically worse than standard TV
recorded on D1 at 768 x 576 resolution. I bet you won't see many
programmes where the characters are wearing brightly coloured thin pin
stipend shirts.

Where did 540x480 come from? At 4:2:0 chroma sub-sampling 1920x1080 has
a colour resolution of 960x540. Given that standard definition digital

540x480 is not correct but neither is 960x540. For 16:9 ratio anamorphic
widescreen at 1920x1080 the 1920 columns are obtained by stretching 1440
columns across the screen and by sampling the colour at 4:2:0 which equates
to only 720 columns of discrete colour.

I made a mistake the first time by quartering 1920 instead of multiplying by
3/8.

D1 at 768x576 still has better colour definition than HDTV sampled and
encoded at 4:2:0 which is equivalent to 720x540 discrete colour pixels.

TV also uses 4:2:0 this is an improvement. I appreciate that up to 4:4:4
is used in studios, but the human eye is still better at resolving
luminance than chrominance.

From a distance on a small screen yes. If you were to project a 4:2:0 image
on a cinema screen the difference from 4:4:4 would be as glaringly obvious
as it is looking at it close up on a computer monitor.

I remember being told digital TV would be better than the present anologue.
I also remember DAB radio was going to be better than CDs.
I'm now wondering if things go in threes.


--
Regards
David

Please reply to News Group

Agamemnon wrote:

"Ben" wrote in message
...

Agamemnon wrote:

Nearly all so-called HDTV content is of that standard or worse (720
lines). I doubt you'll find 1080 line colour broadcast anywhere and
you'll only get 1920 x 1080 non anamorphic widescreen with full 1920
x 1080 colour resolution in a professional TV studio. In fact with a
colour resolution of 480 by 540 HDTV is technically worse than
standard TV recorded on D1 at 768 x 576 resolution. I bet you won't
see many programmes where the characters are wearing brightly
coloured thin pin stipend shirts.


Where did 540x480 come from? At 4:2:0 chroma sub-sampling 1920x1080 has
a colour resolution of 960x540. Given that standard definition digital


540x480 is not correct but neither is 960x540. For 16:9 ratio anamorphic
widescreen at 1920x1080 the 1920 columns are obtained by stretching 1440
columns across the screen and by sampling the colour at 4:2:0 which
equates to only 720 columns of discrete colour.

I know some of the camcorder tape formats like HDV and DVCPRO HD only
have a horizontal resolution of 1440 pixels, but I thought the studio
based formats like HDCAM SR support the full 1920x1080

I made a mistake the first time by quartering 1920 instead of
multiplying by 3/8.

D1 at 768x576 still has better colour definition than HDTV sampled and
encoded at 4:2:0 which is equivalent to 720x540 discrete colour pixels.

TV also uses 4:2:0 this is an improvement. I appreciate that up to
4:4:4 is used in studios, but the human eye is still better at
resolving luminance than chrominance.


From a distance on a small screen yes. If you were to project a 4:2:0
image on a cinema screen the difference from 4:4:4 would be as glaringly
obvious as it is looking at it close up on a computer monitor.

Absolutely, thats why digital cinema uses 4:4:4

In article ,
says...
I remember being told digital TV would be better than the present anologue.
I also remember DAB radio was going to be better than CDs.
I'm now wondering if things go in threes.



Normally they do.

In article ,
David wrote:
I also remember DAB radio was going to be better than CDs.

You remember wrongly.

--
*Husbands should come with instructions

Dave Plowman London SW
To e-mail, change noise into sound.