AVS Forum banner
Status
Not open for further replies.
1 - 10 of 10 Posts

·
Registered
Joined
·
111 Posts
Discussion Starter · #1 ·
Maybe this is a stupid question, but could anamorphic DVDs be replaced sometime in the future with a different format?


I've noticed a lot of people going through the extra pains of buying a Panamorph to combine with their 4x3 projector to get the most resolution and light output possible. But is there a chance that anamorphic DVDs will be discontinued leaving this combination useless? Or is the anamorphic format a necessity?


Hopefully some of you can share your insights on this. With the rapidly changing audio formats, it left me wondering if the same could happen to video.


Thanks,



------------------

Jim Lauritzen
 

·
Registered
Joined
·
4,351 Posts
The more important question would be "is 16x9 a fad" to which the answer is clearly No.


'Anamorphic' is a trick to allow the inherently non-16x9 resolution of DVD (720x480) to be best used for 16x9 material. Its not the only way to represent 16x9 material ie HTDV.


A Panamorph will have the same benefits even for non-anamorphic 16x9 material, as long as your display device has enough vertical resolution. You just need a flexible scaling device.


Andy K.
 

·
Registered
Joined
·
159 Posts
Maybe the 4:3 format will be the casualty on DVD???


------------------

Through man's sweat and God's love, beer came into the world...


- Saint Arnoldus
 

·
Registered
Joined
·
6,227 Posts
Elequently put by Andy above...


The Pannie is just a way to maximise the use of a digital projector designed to display 4:3 images first and video images second for best results... It is not essential and if using a good scaler / image processor / HTPC it is immaterial if the source is anamorphic or not (although the added resolution of anamorphic is another seperate plus)


If Hollywood stops making movies in widescreen formats then it will be a 'fad'... How likely does this sound ???


------------------

[email protected]
HTPC without using windows... GUI Front Ends for Home Theater
 

·
Registered
Joined
·
554 Posts

Quote:
'Anamorphic' is a trick to allow the inherently non-16x9 resolution of DVD (720x480) to be best used for 16x9 material.
I don't think DVD is inherently non-16x9. True, the DVD format contains 720x480 pixels, but it has 3 supported aspect ratios: 4x3, 16x9, and 21x9 (not currently being used http://www.avsforum.com/ubb/frown.gif ), none of which map directly onto the 720x480 pixel grid. It's just a matter of what shape you consider the pixels to be. If you're used to working with computer video, it's hard to think of pixels as anything but square, but the video industry commonly uses non-square pixels. The multiple aspect ratios built into the DVD format were a method of trying to fit various widescreen sizes onto the DVD with as little unused (black) area as possible. I don't know if it's a good thing or bad thing, but we're stuck with lots of different aspect ratios http://www.avsforum.com/ubb/smile.gif . Mix that with digital square-pixel projectors, and you'll always have a need for scalers, whether they be electrical (Quadscan, CI, HTPC, etc) or optical (Panamorph, ISCO, etc), or both http://www.avsforum.com/ubb/smile.gif .


Dave
 

·
Registered
Joined
·
305 Posts
There is more to it than that.


By encoding DVDs anamorphically, we get are able to make full use of that 1950's technology known as NTSC (which is always 4X3), when displaying non-4x3 content.


Theoretically you could anamorphically scale on VHS or OTA, but everybody would need a scaler or a Panamorph. The ONLY reason anamorphic DVD is even used is because the DVD spec called for all DVD players to understand it and scale it back for non 16:9 devices. I personally think this was the best thing the designers of the DVD spec did. (And trust me they did a lot of things wrong - did anybody say zero k of RAM, 16 variable limit, 1 bit subpictures...)


Jeremy


------------------

D-ILA, HTPC, HDTV, Panamorph(?)
 

·
Registered
Joined
·
4,351 Posts
While its true that 720x480 is not square pixels in 4x3, nevertheless it is typically considered a 4x3 resolution.


Ken, yes there is more picture information in those lines (unless the DVD was poorly mastered from a letterboxed D2 tape in which case it probably wouldnt be mastered anamorphic in the first place)


Wait a minute, if you are asking if there is more *actual picture* (ie. more of the frame on the top and bottom), then the answer is no. Its the same picture, just with more detail.


Andy K.



[This message has been edited by kromkamp (edited 05-15-2001).]
 

·
Registered
Joined
·
175 Posts
Maybe some people are spending too much time on this forum! http://www.avsforum.com/ubb/smile.gif Anamorphic DVDs will remain, as they should, since most people who watch them will be using 4:3 TV sets that can do the vertical compression or a 16:9 RPTV. This will be the trend as HDTV catches on. Until FPTVs with HTPCs and externcal scalers are in the common household, don't expect the industry to say: "Hey, we don't need to produce anamorphic transfers because people are using FPTVs, etc. etc."
 
1 - 10 of 10 Posts
Status
Not open for further replies.
Top