PAL vs NTSC vs HDTV

Archived from groups: alt.tv.tech.hdtv (More info?)

"Slim" <slim.pickens@big.bucks.com> wrote in message
news:1ehjg1d66f0k18nl5fgemcvaoqjin9leam@4ax.com...
> Can anyone point me to a site that will give a concise listing of the
> differences between the above?
> My question is originating due to wanting to buy a large(ish) screen
> TV for my home in Bangkok but not knowing or understanding the
> resolution differences between the 3 formats and not wanting to waste
> money buying a HDTV ready set if there is not any real advantage. I
> have cable there, and the signal seems ok on my cheapie 29" set.
> Largish = 42" or larger.
> Any help appreciated, TIA.

NTSC typically is 525 vertical scan lines and a 60 Hz scan rate, interlaced.
PAL is typically 625 vertical scan rate and 50 Hz scan rate, interlaced
(some countries in South America use a 60 Hz scan rate. HDTV is digital and
at least 720 vertical scan lines scanned progressively, with the same scan
rates as the analog system in use. In Bangkok I assume you enjoy an analog
PAL 625/50Hz system and will be offered a digital 720 progressive scan HDTV
system and perhaps a 1080 digital interlaced system. If you view DVD's a
wide screen HDTV set with at least a vertical scan rate equal to your
current PAL system is the minimum you should consider. If digital 720
broadcasts/cable is in the offering you will see a difference with at least
a 720 progressive display.

Richard.

Archived from groups: alt.tv.tech.hdtv (More info?)

"Richard" <rfeirste at nycap.rr.com> wrote in message
news:11gjj3uph82or51@corp.supernews.com...
>
> "Slim" <slim.pickens@big.bucks.com> wrote in message
> news:1ehjg1d66f0k18nl5fgemcvaoqjin9leam@4ax.com...
>> Can anyone point me to a site that will give a concise listing of the
>> differences between the above?
>> My question is originating due to wanting to buy a large(ish) screen
>> TV for my home in Bangkok but not knowing or understanding the
>> resolution differences between the 3 formats and not wanting to waste
>> money buying a HDTV ready set if there is not any real advantage. I
>> have cable there, and the signal seems ok on my cheapie 29" set.
>> Largish = 42" or larger.
>> Any help appreciated, TIA.
>
> NTSC typically is 525 vertical scan lines and a 60 Hz scan rate,
> interlaced. PAL is typically 625 vertical scan rate and 50 Hz scan rate,
> interlaced (some countries in South America use a 60 Hz scan rate. HDTV is
> digital and at least 720 vertical scan lines scanned progressively, with
> the same scan rates as the analog system in use. In Bangkok I assume you
> enjoy an analog PAL 625/50Hz system and will be offered a digital 720
> progressive scan HDTV system and perhaps a 1080 digital interlaced system.
> If you view DVD's a wide screen HDTV set with at least a vertical scan
> rate equal to your current PAL system is the minimum you should consider.
> If digital 720 broadcasts/cable is in the offering you will see a
> difference with at least a 720 progressive display.
>
> Richard.
>
I have only seen PAL in hotel rooms, but was not impressed. It mainly fixes
a problem in NTSC that was hard to implement with vacuum tube circuits. The
625 lines is nice, but the 50 Hz refresh is not. You should be able to find
out locally what Thailand does for HDTV, if anything. You could also go to a
Sony, Sharp, etc web site and see what they sell in your country.

Tam

Archived from groups: alt.tv.tech.hdtv (More info?)

There are PAL TV sets with an 100 Hz refresh rate, that frame-buffer the
image and display it as a progressive image. Believe me they are much better
than NTSC progressive-scan displays, when used with the right material.



"Tam/WB2TT" <t-tammaru@c0mca$t.net> wrote in message
news:BNWdnavg0_5ISJTeRVn-1w@comcast.com...
>
> "Richard" <rfeirste at nycap.rr.com> wrote in message
> news:11gjj3uph82or51@corp.supernews.com...
>>
>> "Slim" <slim.pickens@big.bucks.com> wrote in message
>> news:1ehjg1d66f0k18nl5fgemcvaoqjin9leam@4ax.com...
>>> Can anyone point me to a site that will give a concise listing of the
>>> differences between the above?
>>> My question is originating due to wanting to buy a large(ish) screen
>>> TV for my home in Bangkok but not knowing or understanding the
>>> resolution differences between the 3 formats and not wanting to waste
>>> money buying a HDTV ready set if there is not any real advantage. I
>>> have cable there, and the signal seems ok on my cheapie 29" set.
>>> Largish = 42" or larger.
>>> Any help appreciated, TIA.
>>
>> NTSC typically is 525 vertical scan lines and a 60 Hz scan rate,
>> interlaced. PAL is typically 625 vertical scan rate and 50 Hz scan rate,
>> interlaced (some countries in South America use a 60 Hz scan rate. HDTV
>> is digital and at least 720 vertical scan lines scanned progressively,
>> with the same scan rates as the analog system in use. In Bangkok I assume
>> you enjoy an analog PAL 625/50Hz system and will be offered a digital 720
>> progressive scan HDTV system and perhaps a 1080 digital interlaced
>> system. If you view DVD's a wide screen HDTV set with at least a vertical
>> scan rate equal to your current PAL system is the minimum you should
>> consider. If digital 720 broadcasts/cable is in the offering you will see
>> a difference with at least a 720 progressive display.
>>
>> Richard.
>>
> I have only seen PAL in hotel rooms, but was not impressed. It mainly
> fixes a problem in NTSC that was hard to implement with vacuum tube
> circuits. The 625 lines is nice, but the 50 Hz refresh is not. You should
> be able to find out locally what Thailand does for HDTV, if anything. You
> could also go to a Sony, Sharp, etc web site and see what they sell in
> your country.
>
> Tam
>