Re: Currently-Available Highest-Quality Linear PCM Video?

Radium wrote:
stratus46@xxxxxxxxx wrote:
<snip>
You might be surprised if you saw a serial digital feed on a
broadcast
monitor. Many folks would find it to be totally satisfactory -- if
they
ever got to see it.

AFAIK, it maybe "satisfactory" but it is not the best quality
currently
available.


<snip>


What about the color subcarrier sample rate? The horizontal
frequency
sample rate?


There is no subcarrier for component digital. You didn't look it
up.
The subcarrier is introduced when the component is encoded into
composite. This does not happen with DVD or SD Digital TV. The
horizontal 'sample rate' is a continuous 13.5 MHz with a new line
starting on every 858th sample and the vertical 262.5 X 858
samples.
The 2 chroma difference channels are each sampled 429 x H for
another
858 time periods for a total data rate of 27MHz sample rate. Bump
those
numbers up to 150MHz for HD.

Is HD is best quality currently available? How much is the pixel X
pixel screen area in HD? My LCD computer screen is 1280 X 1024
pixels.

I prefer "first class" uncompressed linear-PCM video signal viewed
through a "first class" plasma screen.

Quite simply put, you're not going to get it now or in the near future.
The best you can get today is MPEG2 HDTV over the air with an ATSC
receiver delivering 19.34 mega BITS/second. That's compressed between
75 and 80:1 and that's the BEST available. Remember HDTV pushes out 150
Mbytes/second and those are not 8 bit but 10 bit so your 1.5Gbits gets
dropped to 19.34Mbits. But, I just got done watching NCIS in HD and it
really looked quite good. So go spend some money on a 1920x1080 native
resolution set with ATSC, put up an antenna and have at it. I've been
watching HD for nearly 3 years and have 2 computers to record HD OTA
feeds. They work very well and you don't need the latest whiz-bang
computer to do it. A Sempron 2500 will do just fine.



The 720 is the active number of samples out of
the 858. That 'dead' time is to allow the CRT based monitors
time to
retrace the Horizontal. The 480 line is computer talk for 525
line
system of which 483 are active. The remaining lines are to
allow
Vertical retrace of a CRT monitor. If you think about it, LCD
and
Plasma do not require retrace since there is no scanning, just
counting
off samples.

That is why plasma and LCD are better than CRT. In addition,
plasma is
better than LCD.


That has nothing to do with why LCD or Plasma is 'better' than a
CRT.
You will find a good number people who think the CRT is a better
image
even in HD. Much of what is 'bad' about the CRT is the support
electonics, mainly poor power supply regulation.

Both LCD and plasma are more resistant to EMI/RFI than CRTs. Plamsa
offers better clarity than LCD or CRT.

More of the support electronics issues but I agree that the CRT is not
what I want. Non-CRT sets all suffer from math rounding error noise
when converting the digital values to PWM to get variable brightness.
CRTs with all their faults do not have that issue.

<snip>

GG

.

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