QUOTE(allenultra @ Dec 9 2009, 08:16 PM)
sorry, I don't think you know what you talking about... Astro B.yond, HD Content Available
Astro B.yond, HD Content Available
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Dec 11 2009, 01:05 AM
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#1
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Dec 11 2009, 01:33 AM
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#2
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at 0.25 time.. quite misleading when the image is shrunk to depict loss of resolution.. LOL... the loss of resolution comes from inter frames not from pixels being shrunk in resolution..
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Dec 11 2009, 10:32 AM
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#3
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QUOTE(anfieldude @ Dec 11 2009, 09:30 AM) One word to add to the 1080i vs 720p debate. that 720p vs 1080i didn't take into account 1 thing...If u have a good deinterlacer 1080i can produce a stunning picture as well. Deinterlacing 1080i is not as easy as it seems. Given a good deinterlacing chip (ie, ABT2010, HQV Reon) you would be hard pressed to tell which is better. Where it is normally seen as better for 720p broadcasts would be for fast moving sports. For movies, if your display has a good deinterlacing chip, u shd be good to go. Or of course if u have a AVR or external scaler/deinterlacer (Lumagen, Crystalio, DVDO) it would yield very good results. The main problem with all HD broadcasts are bit rate compression. That is what you guys/gal shd worry abt. Astro is notorious for that.... and was waiting for you to remind people about deinterlacing.. all DVDs are interlaced as NTSC or PAL say for example 640x 480i DVD source deinterlaced to 480p with a good deinterlacer is way better than any super hi-bit rate 320x240p (half rez) video... on stationary /static video, 1080i-50/60hz can replicate 1080p 24 if all the flags are inserted correctly.. on slowing moving video the edges of the moving object will be affected.. stationary background can equate to 1080p video... on fast moving scenes, like sports, then it will have 20-30% loss in quality (and awful combing effect) and have to rely on motion adaptive deinterlacer to work it's magic anyway more details here... http://www.100fps.com/ |
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Dec 11 2009, 10:49 AM
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#4
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QUOTE(barry @ Dec 11 2009, 10:45 AM) I thought all flat panel displays today have inbuilt deinterlacers, which will convert from your 1080i to 1080p internally. In theory, that should give us more details as opposed to 720p, assuming that your display is capable of 1080 resolution. previously the quality of deinterlacers are not so good.. but I think now even standard chips used in TV sets have pretty good deinterlacers.. havent seen much combing effect on TVs playing interlaced video for a long time.. nowadays if want to see combing effect, need to use PC with media player software and turn off all the deinterlacing.. then only can see it.. usually on those 1080i .TS broadcast video files.. |
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Dec 11 2009, 11:27 AM
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QUOTE(barry @ Dec 11 2009, 11:19 AM) if astro is going to broadcast in 1080i instead of 720p, then all the more reason for me to skip it although i still hate to see the aspect-ratio distortion (fat and short people like me). |
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Dec 11 2009, 12:14 PM
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#6
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QUOTE(barry @ Dec 11 2009, 11:44 AM) what i mean to say, ar188, is that since i will still stick to the non-hd astro, i will still see the stinking distorted 4:3 playing on my 16:9 plasma tv. you can always keep it in 4:3 mode on your plasma (just ignore the black bars on the left/right side and if able to try not to worry about IR |
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Dec 12 2009, 10:42 AM
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#7
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QUOTE(-kytz- @ Dec 12 2009, 09:26 AM) LOL isn't it obvious?The PQ wouldn't be as sharp as 720p on 720p.Just the same concept as playing 640x480 video on a 1920x1080 resolution...the video gets more pixelated 1.Are u sure the 720p tv u have is a true 1280x720p? Where u have 1:1 pixel mapping?2. 640x480 is 4-3 ratio. 1920x1080 tv is 16-9. Surely some horizontal stretching required. |
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Dec 13 2009, 11:29 PM
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#8
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probably a power brick..laptop style..
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Dec 13 2009, 11:44 PM
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#9
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har? asking astro to provide MKV???
This post has been edited by ar188: Dec 13 2009, 11:45 PM |
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Dec 14 2009, 06:37 PM
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#10
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QUOTE(SiriuslyCold @ Dec 14 2009, 05:05 PM) watch first only comment la.. now is Epi 5 or more already.. .. WWII in HD (history channel).. the opening shot : this program contains rare films of world war II, originally shot in color, Found during a 2 year worldwide search.. ok, so the raw footage is very blur or dirty/grainy.. but HD mastering preserves the original quality, I dun need another low bitrate MPEG compression (if broadcast thro normal SD) to add a layer of blur-ness on to already blur/grainy stock footage.. also the other composites like photos/ pictures and CGI text are all HD sharp.. so is the razor sharp H channel logo.. This post has been edited by ar188: Dec 14 2009, 06:40 PM |
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Dec 15 2009, 01:40 PM
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#11
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Dec 15 2009, 08:16 PM
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#12
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Dec 15 2009, 11:53 PM
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#13
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QUOTE(neb @ Dec 15 2009, 11:48 PM) the larger the dish, more gain, less rain-fade problem then again higher resolution, .. hence larger dish /higher data rate maybe needed to buffer the incoming large volume of data.. meaning maybe prone to weather also.. |
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Dec 17 2009, 01:29 PM
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QUOTE(asellus @ Dec 17 2009, 12:28 AM) It should be the other way around. Using 1080i to display still scenes will cause flickering because of the interlacing that needs to be done. Flickering = bad. The flickering is almost impossible to notice in fast-paced scenes but easily noticeable as you stare at that iguana in NatGeo HD. flickering? you think old CRT with interlaced output meh? (even then , we got progressive scan 100hz CRT )And BTW, I'm pretty damn sure that CBS use 1080i for their sport offerings. all plasma/LCd is progressive scan panel lor.. how to see any flickering? |
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Dec 17 2009, 01:51 PM
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QUOTE(pirateguy @ Dec 17 2009, 01:50 PM) I'm curious to know where asellus got the info about 1080i is better for sport. From what I read off the web so far, 720p is for sport, 1080i is for movie. I think he got mixed up.. moving scene interlace = bad.. I have yet to find claim about 1080i is better for sport, 720p for still images, and the so called flicker effect (which I don't even notice on HDTVs). |
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Dec 18 2009, 11:58 AM
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#16
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QUOTE(asellus @ Dec 18 2009, 02:52 AM) ESPN HD in Australia is basically the same as ESPN HD US, therefore it is not surprising that it also uses 720p. It wasn't surprising really, as you can see Derek Rae and Tommy Smyth on that channel. The ESPN in SEA is heavily customized (that's why we don't see Tommy Smyth here, but we can see the likes of John Dykes and co. instead). at the end of the day.. depends on the actual HD cameras used, if it's 1080i camera, can be converted to 720p also for the broadcast format.. then it's not really true 720p source for that material so maybe then 720p of that footage may not represent true 720p. Sky TV supports 720p on STB level, not on broadcast level. Meaning, viewers who wants to see Chelsea vs Arsenal in 720p in Sky Sport HD will set it in their STB and the STB will convert it to their preferences. Still broadcasted in 1080i though. If you hang around in internet forums that specialized in broadcasting, home theaters etc. it is accepted that 1080i is preferred than 720p for sports. For example, NBA in CBS looks better than in FOX because it looks sharper, although of course some people disputes this. The whitepapers may say that 720p is better for sports, but in the real world, 1080i trumped 720p when it comes to performance at the same bitrates, according to viewers feedback. The larger number of HD sport channels that uses 1080i compared to those with 720p confirms that. If 720p is so good for sport channels (or movies etc.), why wasn't it was used then? If the broadcasters uses 720p for HD sport broadcasts, they can actually also simulcast the SD version of the said channel simultaneously on the same spectrum, which will allow them to wring more profits. and also depends on your TV, if it can de-interlace 1080i properly, then (as my order of preference anyway) 1080i is still better than 720p. the logic is that 1080i has all the spatial details to make 1920x1080p (i.e. two 1080i frames can be used to build 1920x1080 frame properly if still or slow moving image) but loss at the time detail (movement between frames, i.e. fast moving frames).. but most TVs are pretty good at de-interlacing anyway hence why we rarely see "haircomb" effect as the picture shown above by pirateguy.. but that means loss of detail at the edges of fast moving objects... so maybe 20-30% loss of details compared to 1080p image (if fast moving video), but on stationary image then 1080i = 1080p.. you can fully reconstruct 1080i to 1080p (at half refresh rate) for 720p.. well it's still 1 million pixel short of 1080p or 1080i for that matter.. and many pixel interpolation engine (using 720p signal) is still not as good to "guess" how the extra 1million pixels should be on a 1080p TV... so loss of detail at every frame.. 50% loss of details compared to 1080p image.. |
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Dec 18 2009, 03:02 PM
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#17
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I wonder any cheapo HD recorder around ?
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Dec 18 2009, 07:19 PM
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#18
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Dec 18 2009, 08:49 PM
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#19
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I wonder if HBO will be in DD5.1 ?
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Dec 19 2009, 04:43 PM
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#20
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