Horizontal resolution?

I believe it was in 2001 when I purchased my JVC D-Series AV-27D201
TV. According to their 'archive' on the JVC website it says that it
has a horizontal resolution of 700. What is the normal resolution for
that, does this TV support any form of HDTV as some DVDs I have are
recorded in HD and it appears that the TV supports HD through
component cables.

The only thing is that it is a 27" screen, which is it even worth
watching HD, as I'm also thinking of buying an AppleTV and only will
if I have HD for it.

http://www.jvc.ca/en/consumer/archiv...odel=AV-27D201

On Mar 24, 3:30 pm, "Travis" wrote:
I believe it was in 2001 when I purchased my JVC D-Series AV-27D201
TV. According to their 'archive' on the JVC website it says that it
has a horizontal resolution of 700. What is the normal resolution for
that, does this TV support any form of HDTV as some DVDs I have are
recorded in HD and it appears that the TV supports HD through
component cables.

The only thing is that it is a 27" screen, which is it even worth
watching HD, as I'm also thinking of buying an AppleTV and only will
if I have HD for it.

http://www.jvc.ca/en/consumer/archiv...sp?model=AV-27...

http://www.michaeldvd.com.au/Article.../PALvsNTSC.asp

Travis wrote:
I believe it was in 2001 when I purchased my JVC D-Series AV-27D201
TV. According to their 'archive' on the JVC website it says that it
has a horizontal resolution of 700. What is the normal resolution for
that, does this TV support any form of HDTV as some DVDs I have are
recorded in HD and it appears that the TV supports HD through
component cables.

The only thing is that it is a 27" screen, which is it even worth
watching HD, as I'm also thinking of buying an AppleTV and only will
if I have HD for it.

http://www.jvc.ca/en/consumer/archiv...odel=AV-27D201

You have a nice standard def set. Lines of resolution is extremely mis-
leading and IMO a junk spec. The definition is when the signal reaches
5% (95% down) of the low frequency value (referred to as Depth Of
Modulation - DOM ) and was orignially intended for evaluating
cameras.

Other broadcast gear is tested much the same way as audio gear in
terms of flatness of response, low distortion (differential phase and
gain) and power bandwidth which makes perfect sense for proc amps,
distribution amplifiers (DAs) and non-heterodyne tape machines.

The composite broadcast signal whether off air, satellite or cable is
band limited to 4.2 MHZ which roughly corresponds to 330 lines of
resolution but keep in mind that lines of resolution is actually line
pairs, one light and one dark which means your 330 lines is around 660
pixels so 640x480 is standard def TV. To go beyond that 330 lines
requires special test generators to make a test signal to get up to
700 lines resolution but stays within the original 525 line frame
system. I.E. its a junk number that means very little except to say
MINE does 700 but YOURS does ONLY 650.

If someone said they had audio gear that was 26dB (95%) down at 30kHz,
what does that mean in terms of the sound? How flat is it to 20HKz? It
tells you nothing useful.

GG

In article .com "G-squared" writes:

The composite broadcast signal whether off air, satellite or cable is
band limited to 4.2 MHZ which roughly corresponds to 330 lines of
resolution but keep in mind that lines of resolution is actually line
pairs, one light and one dark which means your 330 lines is around 660
pixels so 640x480 is standard def TV. To go beyond that 330 lines
requires special test generators to make a test signal to get up to
700 lines resolution but stays within the original 525 line frame
system. I.E. its a junk number that means very little except to say
MINE does 700 but YOURS does ONLY 650.

Except line pairs is used in film photography for film and lenses.

Video is rated in single lines. Really the "horizontal resolution" is
"lines of horizontal resolution per picture height". For standard def
TV, that is 3/4 of the width. The picture height is 480 lines, though
some point out that limitations of CRT display, as well as interlace,
reduce the effectiveness of it.

Given the time that the standard def television signal uses to send one
scan line and write it on a CRT screen, and the fact that each full cycle
can show one dark and one light value, a 1 megahertz signal will draw 80
values (40 cycles) across the 75% width of the screen. Thus, the horizontal
resolution figure so measured is also a measurement of video system bandwidth;
and is 80 times the luminance bandwidth in MHz.

I said luminance bandwidth, because the color coding of compatable
systems is at much lower bandwidth/resolution than the luminance value.
The luminance channel is that which goes to about 4.2 MHz in over the air
NTSC, resulting in about 336 lines of horizontal resolution per picture
height.

The original poster's set claimed 700 lines, which is about double
broadcast (assuming the claim was honest, and following the standard form
of specificaion). As such, the set should take the component signal from a
digital receiver and produce a very good signal from an HD transmission,
even though the display is not actually HD.

If someone said they had audio gear that was 26dB (95%) down at 30kHz,
what does that mean in terms of the sound? How flat is it to 20HKz? It
tells you nothing useful.

Indeed. The bandwidth/resolution measure for TV is very generous, and
counts signal as present when it is substantially degraded.

Alan

"Travis" wrote in message
ups.com...
I believe it was in 2001 when I purchased my JVC D-Series AV-27D201
TV. According to their 'archive' on the JVC website it says that it
has a horizontal resolution of 700. What is the normal resolution for
that, does this TV support any form of HDTV as some DVDs I have are
recorded in HD and it appears that the TV supports HD through
component cables.

The only thing is that it is a 27" screen, which is it even worth
watching HD, as I'm also thinking of buying an AppleTV and only will
if I have HD for it.

http://www.jvc.ca/en/consumer/archiv...odel=AV-27D201


Apple TV, hahahahahaha!!!!

--
ThePunisher

"G-squared" wrote in message
oups.com...

Travis wrote:
I believe it was in 2001 when I purchased my JVC D-Series AV-27D201
TV. According to their 'archive' on the JVC website it says that it
has a horizontal resolution of 700. What is the normal resolution for
that, does this TV support any form of HDTV as some DVDs I have are
recorded in HD and it appears that the TV supports HD through
component cables.

The only thing is that it is a 27" screen, which is it even worth
watching HD, as I'm also thinking of buying an AppleTV and only will
if I have HD for it.

http://www.jvc.ca/en/consumer/archiv...odel=AV-27D201

You have a nice standard def set. Lines of resolution is extremely mis-
leading and IMO a junk spec. The definition is when the signal reaches
5% (95% down) of the low frequency value (referred to as Depth Of
Modulation - DOM ) and was orignially intended for evaluating
cameras.

Other broadcast gear is tested much the same way as audio gear in
terms of flatness of response, low distortion (differential phase and
gain) and power bandwidth which makes perfect sense for proc amps,
distribution amplifiers (DAs) and non-heterodyne tape machines.

The composite broadcast signal whether off air, satellite or cable is
band limited to 4.2 MHZ which roughly corresponds to 330 lines of
resolution but keep in mind that lines of resolution is actually line
pairs, one light and one dark which means your 330 lines is around 660
pixels so 640x480 is standard def TV. To go beyond that 330 lines
requires special test generators to make a test signal to get up to
700 lines resolution but stays within the original 525 line frame
system. I.E. its a junk number that means very little except to say
MINE does 700 but YOURS does ONLY 650.


Neglecting overscan, the length of the visible horizontal scan line is about
53 us. If you really had a bandwidth of 4.2 MHz ( which is the black/white
number), that works out to 223 cycles of a 4.2 MHz sine wave, or 446 half
cycles. They would call this a horizontal resolution of 446 lines. These are
not really pixels, because it is not 223 black lines and 223 white lines;
more like 223 light gray and 223 dark gray. An advertising guy would look at
the set, and if he can make out the difference between the light and the
dark, he would call it a resolution of 446 lines. In a low end color TV set,
the bandwidth might only be about 3.3 MHz, because they cut off the
bandwidth before the color subcarrier. That would give you the 330 line
resolution when you throw in the overscan. At any rate, the claimed 700 line
resolution would be through the component input, on a signal that has never
been NTSC. To get even 400+ horizontal resolution, you need S video, which
moves the color information out of band.

Tam
If someone said they had audio gear that was 26dB (95%) down at 30kHz,
what does that mean in terms of the sound? How flat is it to 20HKz? It
tells you nothing useful.

GG

In article "Tam/WB2TT" writes:


Neglecting overscan, the length of the visible horizontal scan line is about
53 us. If you really had a bandwidth of 4.2 MHz ( which is the black/white
number), that works out to 223 cycles of a 4.2 MHz sine wave, or 446 half
cycles. They would call this a horizontal resolution of 446 lines. These are
not really pixels, because it is not 223 black lines and 223 white lines;
more like 223 light gray and 223 dark gray. An advertising guy would look at
the set, and if he can make out the difference between the light and the
dark, he would call it a resolution of 446 lines.

Close, except you missed the part about the resolution being measured
"per picture height". You need to multiply your resolution by 3/4 to
get 334 lines.


In a low end color TV set,
the bandwidth might only be about 3.3 MHz, because they cut off the
bandwidth before the color subcarrier. That would give you the 330 line
resolution when you throw in the overscan. At any rate, the claimed 700 line
resolution would be through the component input, on a signal that has never
been NTSC. To get even 400+ horizontal resolution, you need S video, which
moves the color information out of band.

Modern sets generally have comb filters that allow luminance to extend to
that point without needing S-video. In fact, many older sets could pass the
chroma through the luma channel, though they may have had a notch filter for
it, you often could see it.

Alan