[opendtv] Re: [Fwd: Re: Re: Math of oversampling - corrected links

  • From: Tom Barry <trbarry@xxxxxxxxxxx>
  • To: opendtv@xxxxxxxxxxxxx
  • Date: Fri, 29 Apr 2005 19:15:30 -0400

Some of the links listed below were broken, now fixed.

- Tom


Tom Barry wrote:
> 
> Jeroen Stessen wrote:
> 
>> Original: 1920x1080p (cropped from a 2126x1417 original still image). 
>> There are 4 scaled versions: via 1280x720, 1024x576, 832x468, 712x400.
>> These 5 pictures should give you a good idea of the continuum of 
>> sharpness as a function of the down-sampling ratio. As always, the 
>> bandwidth is limited to -3 dB at 73% of the Nyquist limit of the down-
>> sampled (intermediate) image, except for the original 1080p image.
> 
> 
> Hey, great new series.  These are now posted at:
> 
>     www.trbarry.com/Philips_home_1080p.jpg
>     www.trbarry.com/Philips_home_720p.jpg
>     www.trbarry.com/Philips_home_576p.jpg
>     www.trbarry.com/Philips_home_468p.jpg
>     www.trbarry.com/Philips_home_400p.jpg
> 
> These allow everyone to better measure the possible costs of
> various lower transmission resolutions.  I guess the best way to
> proceed is first compare the extremes 1080p vs 400p and get a feel
> for what to look for.  Then iterate through them all and see how
> and where quality does or doesn't degrade by this process.
> 
> Since we will all likely be using 1080p displays someday these are
> maybe some good examples of what to expect.
> 
> - Tom
> 
> 
> 
> 
> 
 
 
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