DS Forums

davidweller · 28-09-2008, 10:53

My Blu-ray Disc player and TV both support 24p.

However, I can find no explanation of what this actually is and what it is supposed to do.

Can anyone explain this in layman's terms and advise whether or not I should have this feature turned on?

niall campbell · 28-09-2008, 10:58

can you see a flicker or juddery movement onthe tv?

if you can switch it on, if theres an option..... it might do it automatically anyway

I see the judder but many do not

its frames per second.... 25 for normal 24 for cinema

Orbitalzone · 28-09-2008, 12:11

Most films are filmed at 24 frames per second.... PAL (european) TV displays at 25fps and NTSC countries display tv at 30 frames per sec (or 29.997 give or take)

So, to put a film onto PAL TV via video or DVD they have to speed the film playback 4%.. this works quite well...but it's not quite like the original.... to put the film onto NTSC tv's they need to use a different method... this creates judder as they have to 'fill in' the extra frames required to get up to 30fps.

So blu ray can show the film in the original 24 frames it was made at... and providing your TV can display 24fps it then gives you a perfect reproduction (frame wise) Read the wiki item below as it is fairly easy to understand (hopefully) and mentions that 24fps can still display judder on panning shots or fast action pan shots.

see http://en.wikipedia.org/wiki/24p

davidweller · 28-09-2008, 12:23

Thanks for that.

The Wiki piece is too technical for my poor brain; but I'll turn on the feature and see how it goes.

Orbitalzone · 28-09-2008, 12:32

I'm sure some others will explain it better than I tried! (and no doubt pick to shreds the inaccuricies!)

zaeon · 28-09-2008, 20:28

Quote:

Originally Posted by Orbitalzone

I'm sure some others will explain it better than I tried! (and no doubt pick to shreds the inaccuricies!)

No, it was perfectly clear to me, but then I'm a time served TV Service Technician (Mainly Analogue TV, but some Digital knowledge). Our Hitachi 36" Wide Screen top-end set is Multi Standard so can accept a number of feild(frame) rates., as well as Pal g/b/i and H??(Odd format that), secam (There are two variants of this standard),NTSC (50 and 60HZ) and various Sound IF/Decoder options all accesible from the service mode,and screen aspect ratios of, 4:3 in pan, letterbox ,fullscreen, 16:9 in standard and Letterbox, 14:9 in standard and letterbox, and Panoramic . . It's a pity some of the NEW HD format sets don't offer as wide a range of options.

Orbitalzone · 28-09-2008, 22:21

You certainly would think that most TV's these days would accept pretty much all formats... it's usually all possible in the same IC. Still I suppose it's down to market pricing and stops inport/export to cheaper/dearer regions.

I like your phrase 'timer served TV service technician' - that made me smile as I feel I served my time in the TV retail industry too.... although probably would have earnt more being on the dole hehehe

mash440 · 28-09-2008, 22:50

The problem is most prevalent with slow moving pans. For example, crane shots, animation backgrounds while moving etc.

zaeon · 29-09-2008, 21:38

Quote:

Originally Posted by Orbitalzone

You certainly would think that most TV's these days would accept pretty much all formats... it's usually all possible in the same IC. Still I suppose it's down to market pricing and stops inport/export to cheaper/dearer regions.

I like your phrase 'timer served TV service technician' - that made me smile as I feel I served my time in the TV retail industry too.... although probably would have earnt more being on the dole hehehe

I hadn't thought of the prison connotation (LOL)...I was the youngest apprentice that the firm I worked for had ever taken on (16)...4 years of sweat and toil, with all the usual pranks played on me. But I enjoyed it, and , boy could I tell some stories of the strange things I found inside some sets. (Like, for instance, a USED condom???!!!)

28-09-2008, 10:53	#1
davidweller Forum Member Join Date: Oct 2004 Location: Wallington, Surrey Posts: 6,960	24p My Blu-ray Disc player and TV both support 24p. However, I can find no explanation of what this actually is and what it is supposed to do. Can anyone explain this in layman's terms and advise whether or not I should have this feature turned on?

28-09-2008, 10:58	#2
niall campbell Forum Member Join Date: May 2006 Location: Aberfeldy Posts: 7,035	can you see a flicker or juddery movement onthe tv? if you can switch it on, if theres an option..... it might do it automatically anyway I see the judder but many do not its frames per second.... 25 for normal 24 for cinema

28-09-2008, 12:11	#3
Orbitalzone Forum Member Join Date: Oct 2000 Location: Sussex Posts: 12,173	Most films are filmed at 24 frames per second.... PAL (european) TV displays at 25fps and NTSC countries display tv at 30 frames per sec (or 29.997 give or take) So, to put a film onto PAL TV via video or DVD they have to speed the film playback 4%.. this works quite well...but it's not quite like the original.... to put the film onto NTSC tv's they need to use a different method... this creates judder as they have to 'fill in' the extra frames required to get up to 30fps. So blu ray can show the film in the original 24 frames it was made at... and providing your TV can display 24fps it then gives you a perfect reproduction (frame wise) Read the wiki item below as it is fairly easy to understand (hopefully) and mentions that 24fps can still display judder on panning shots or fast action pan shots. see http://en.wikipedia.org/wiki/24p

28-09-2008, 12:23	#4
davidweller Forum Member Join Date: Oct 2004 Location: Wallington, Surrey Posts: 6,960	Thanks for that. The Wiki piece is too technical for my poor brain; but I'll turn on the feature and see how it goes.

28-09-2008, 12:32	#5
Orbitalzone Forum Member Join Date: Oct 2000 Location: Sussex Posts: 12,173	I'm sure some others will explain it better than I tried! (and no doubt pick to shreds the inaccuricies!)

28-09-2008, 20:28	#6
zaeon Forum Member Join Date: Jul 2008 Location: County Durham Posts: 311	Quote: Originally Posted by Orbitalzone I'm sure some others will explain it better than I tried! (and no doubt pick to shreds the inaccuricies!) No, it was perfectly clear to me, but then I'm a time served TV Service Technician (Mainly Analogue TV, but some Digital knowledge). Our Hitachi 36" Wide Screen top-end set is Multi Standard so can accept a number of feild(frame) rates., as well as Pal g/b/i and H??(Odd format that), secam (There are two variants of this standard),NTSC (50 and 60HZ) and various Sound IF/Decoder options all accesible from the service mode,and screen aspect ratios of, 4:3 in pan, letterbox ,fullscreen, 16:9 in standard and Letterbox, 14:9 in standard and letterbox, and Panoramic . . It's a pity some of the NEW HD format sets don't offer as wide a range of options.

28-09-2008, 22:21	#7
Orbitalzone Forum Member Join Date: Oct 2000 Location: Sussex Posts: 12,173	You certainly would think that most TV's these days would accept pretty much all formats... it's usually all possible in the same IC. Still I suppose it's down to market pricing and stops inport/export to cheaper/dearer regions. I like your phrase 'timer served TV service technician' - that made me smile as I feel I served my time in the TV retail industry too.... although probably would have earnt more being on the dole hehehe

28-09-2008, 22:50	#8
mash440 Forum Member Join Date: Sep 2008 Location: Manchester, UK Posts: 38	The problem is most prevalent with slow moving pans. For example, crane shots, animation backgrounds while moving etc.

29-09-2008, 21:38	#9
zaeon Forum Member Join Date: Jul 2008 Location: County Durham Posts: 311	Quote: Originally Posted by Orbitalzone You certainly would think that most TV's these days would accept pretty much all formats... it's usually all possible in the same IC. Still I suppose it's down to market pricing and stops inport/export to cheaper/dearer regions. I like your phrase 'timer served TV service technician' - that made me smile as I feel I served my time in the TV retail industry too.... although probably would have earnt more being on the dole hehehe I hadn't thought of the prison connotation (LOL)...I was the youngest apprentice that the firm I worked for had ever taken on (16)...4 years of sweat and toil, with all the usual pranks played on me. But I enjoyed it, and , boy could I tell some stories of the strange things I found inside some sets. (Like, for instance, a USED condom???!!!)