RE: What is 575i?

["Mark Harrison" <Mark.Harrison@xxxxxxx>]

Yes and no :-)

I would agree that the term IS a HDTV term, in the sense that it came
about because the hi-def industry wanted a way to express the already
existing standards in numbers that were comparable with the numbers
they
were using to describe the new standards. 

This also explains why the HDTV industry prefer the number 575 instead
of 625 - because it gives visible lines, and is therefore a fairer
comparison with the 720 visible lines, say, of 720p. This is because
625->720 feels a lot less of a jump than 575->720.

However, 575i is not a "high-definition TV standard" in the sense
that
it does NOT offer any higher definition than the existing broadcast
standards used in most of Europe, Africa and Asia.

Best to regard it as a translation term...

... Old way of saying things - PAL
... New way of saying things - 575i

... Old way of saying things - NTSC
... New way of saying things - 480i

... Old way of saying things - Pal Progressive
... New way of saying things - 575p

... Old way of saying things - NTSC progressive
... New way of saying things - 480p

... Old way of saying things - Nasty, Hideous, Evil HDTV
... New way of saying things - 1024i

... Old way of saying things - God's own HDTV standard
... New way of saying things - 720p

(OK - I was sort of making up the last two "old terms") :-)

Regards,

Mark

-----Original Message-----
From: Mike Griffiths [mailto:mike@xxxxxxx] 
Sent: 9 January 2003 20:00
To: ukha_d@xxxxxxx
Subject: RE: [ukha_d] What is 575i?


I don't think so Mark
It is one of the many High Def Standards that are around at present 
1080i, 1035i, 720p, 575p, 575i, 480p and 480i
Last convention I went to in the States they were about 9 different
versions!!

Mike


> -----Original Message-----
> From: Mark Harrison [mailto:Mark.Harrison@xxxxxxx]
> Sent: 09 January 2003 13:40
> To: ukha_d@xxxxxxx
> Subject: RE: [ukha_d] What is 575i?
> 
> 575i is the visible part of PAL.
> 
> PAL has 625 lines, but only 575 of them are displayable. Likewise,
> NTSC's 525 lines are only really 483.
> 
> The missing lines are part of the sync pulse and, in terrestrial TV,
> used to display teletext.
> 
> Regards,
> 
> Mark
> 
> -----Original Message-----
> From: Ben McCormack [mailto:ben.mccormack@xxxxxxx]
> Sent: 8 January 2003 13:02
> To: ukha_d@xxxxxxx
> Subject: [ukha_d] What is 575i?
> 
> 
> Hello all
> 
> I am finally deciding on my projector connections and I am wondering
> what exactly is 575i, I know that it is 575 lines Interlaced signal,
> is this what a Tivo outputs in RGB mode from SCART?
> 
> Cheers again
> 
> Ben
> 
> 
> http://www.automatedhome.co.uk
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