Converting component sync

Doughboy wrote:

For now, I've got the Freeview box going into my PC's graphics card
via composite and back out to the TV via DVI, which looks great but I
don't really want to have to leave the PC on just to watch TV. If I do
end up doing things this way, I'd probably be better off just getting
a Freeview card/adapter for the PC.

If your TV had a DVI input, then that increases the chance that it
actually can handle 50 Hz. I wonder if you're simply confusing the
capabilities of your converter cables? Did the graphics card output have
to be set to 60 Hz when you were driving the TV? What is the model
number of the TV?

--
Dave Farrance

On Fri, 15 Dec 2006 14:56:43 -0000, "Stephen"
wrote:

Some cheap "standards converters" don't change the number of lines or the
field rate. They are designed to re-encode the colour part of the composite
signal, from NTSC at 3.58 MHz to PAL at 4.43 MHz or possibly vice versa, to
make a composite input TV work on the wrong standard.

What exactly do you mean by a composite/s-video standards converter though?
Does is just convert composite to s-video? If so, that does practically
nothing to the signal anyway.

Are you sure that your TV won't work with 50 Hz video? Was it bought in the
USA?

It's a proper Digital Video Converter (made by Com World I think),
that can convert from/to any composite or s-video signal at various
standards. I'm baffled as to why it won't convert my Freeview's
composite signal. The Freeview does have s-video out as well, which
I'll try when I get a suitable lead.

I bought the TV second-hand over here but it was originally bought in
the USA.

Doughboy

On Fri, 15 Dec 2006 14:29:17 GMT, Paul Ratcliffe
wrote:

On Fri, 15 Dec 2006 13:38:55 GMT, Doughboy wrote:

Can anyone tell me how easy/hard it is to convert a PAL component
signal to an NTSC component signal.

PAL and NTSC refer to composite signals. It is meaningless to refer to
PAL or NTSC component.
What you probably mean is "convert 625/50 component to 525/60 component".

Thanks for the clarification. If I'd understood that before (rather
than thinking that because component doesn't involve PAL and NTSC, any
device would work), I could have saved myself some bother.


Doughboy

In message , charles
writes
In article ,
Stephen wrote:


Are you sure that your TV won't work with 50 Hz video? Was it bought in
the USA?

not unusual - 50Hz ones often can run at 60Hz, but rarely the other way
round.


When you play back an NTSC tape on a PAL VCR which has NTSC-playback,
you are watching a 60Hz 525-line picture. If the video output is
composite (whether baseband of at RF) the colour is at 4.43MHz.
Ian.
--

On Fri, 15 Dec 2006 15:35:04 GMT, Dave Farrance
wrote:

Doughboy wrote:

For now, I've got the Freeview box going into my PC's graphics card
via composite and back out to the TV via DVI, which looks great but I
don't really want to have to leave the PC on just to watch TV. If I do
end up doing things this way, I'd probably be better off just getting
a Freeview card/adapter for the PC.

If your TV had a DVI input, then that increases the chance that it
actually can handle 50 Hz. I wonder if you're simply confusing the
capabilities of your converter cables? Did the graphics card output have
to be set to 60 Hz when you were driving the TV? What is the model
number of the TV?

I'm not sure what you mean about confusing the capabilities of my
converter cables.

The graphics card doesn't need the settings adjusted manually when
using the DVI output, unlike when using the composite output where I
had to manually set it to PAL or NTSC (unless it happened to default
to the relevent setting).

However, looking at the resolution settings that it's using, it is set
to 60hz. It seems to get the information from the TV (it shows it's a
Sony TV) and the only option for the refresh rate is 60hz.

It's a Sony 34XBR800.

Doughboy

Paul Ratcliffe wrote:
On Fri, 15 Dec 2006 13:38:55 GMT, Doughboy wrote:

Can anyone tell me how easy/hard it is to convert a PAL component
signal to an NTSC component signal.

PAL and NTSC refer to composite signals.

Just to be ultra pedantic, NTSC refers to the TV standard, and not the
colour encoding system used. PAL (and SECAM) are colour coding
standards.

However that doesn't affect the validity of the answer given.

In article . com,
Mark Carver wrote:

Paul Ratcliffe wrote:
On Fri, 15 Dec 2006 13:38:55 GMT, Doughboy wrote:

Can anyone tell me how easy/hard it is to convert a PAL component
signal to an NTSC component signal.

PAL and NTSC refer to composite signals.

Just to be ultra pedantic, NTSC refers to the TV standard,

even more pedantically, the NTSC were the body that set the standard. ;-)

--
From KT24 - in "Leafy Surrey"

Using a RISC OS computer running v5.11

Doughboy wrote:

The graphics card doesn't need the settings adjusted manually when
using the DVI output, unlike when using the composite output where I
had to manually set it to PAL or NTSC (unless it happened to default
to the relevent setting).

However, looking at the resolution settings that it's using, it is set
to 60hz. It seems to get the information from the TV (it shows it's a
Sony TV) and the only option for the refresh rate is 60hz.

It's a Sony 34XBR800.

OK. Seems the TV's more trouble than it's worth, then.

--
Dave Farrance

On Fri, 15 Dec 2006 17:54:43 GMT, Dave Farrance
wrote:

Doughboy wrote:

The graphics card doesn't need the settings adjusted manually when
using the DVI output, unlike when using the composite output where I
had to manually set it to PAL or NTSC (unless it happened to default
to the relevent setting).

However, looking at the resolution settings that it's using, it is set
to 60hz. It seems to get the information from the TV (it shows it's a
Sony TV) and the only option for the refresh rate is 60hz.

It's a Sony 34XBR800.

OK. Seems the TV's more trouble than it's worth, then.

Do some DVI inputs work at 50hz as well then? So when looking at DVI
equipment (eg DVD player), I'd have to make sure it worked on the 525
line/60hz system to be compatible with my TV?

Doughboy

Doughboy wrote:

On Fri, 15 Dec 2006 17:54:43 GMT, Dave Farrance:

OK. Seems the TV's more trouble than it's worth, then.

Do some DVI inputs work at 50hz as well then? So when looking at DVI
equipment (eg DVD player), I'd have to make sure it worked on the 525
line/60hz system to be compatible with my TV?

A DVI or HDMI input is indicative of a more flexible chipset, but not in
the case of your TV, it seems. Even if you did buy a dual-standard DVD
player that could output 60Hz, it would only do so with "NTSC" DVDs.

You will only be able to play "PAL" DVDs on that TV via your computer -
and even then you should notice a slight jerkiness because the frame
rates do not convert too well.

--
Dave Farrance