4 ms·

> We won't even get into how 720 screens don't really have 720 display pixels so even perfect size matches are resampled and interpolated Since there's nowhere

> We won't even get into how 720 screens don't really have 720 display pixels so even perfect size matches are resampled and interpolated Since there's nowhere near 720 pixels x 60 frames/sec worth of information being sent to your TV, who cares?

dpark 15y ago
Maybe because resampling and interpolation are more damaging to lower-resolution streams? Also, depending on the video source, there might very well be a 720p x 60Hz signal being sent to the TV.
- jpdoctor 15y ago
  > 720p x 60Hz signal being sent to the TV. Let's do the arithmetic: 720p is 1280x720 pixels RGB = 24 bits/pixel 60 frames/sec 1280x720x24x60 = 1.3 Gbps For comparison: Full broadcast HD is around 15 Mbps Why people think they can see full 720p worth of information is beyond me. EDIT: Pay attention to the last sentence and the posts above. Of course I don't think people can see 1.3G worth of info. Again: Why people think they can see full 720p worth (=1.3G) of information is beyond me.
  - agscala 15y ago
    If you don't think it's compressed, you're kidding yourself
  - dpark 15y ago
    > 1280x720x24x60 = 1.3 Gbps So your argument is that compression doesn't exist? Do you also listen to 128kb WAV files and argue that they are equivalent to 128kb MP3s? > Why people think they can see full 720p worth of information is beyond me. From a distance of about 8 feet on a TV about 50 inches in size, the difference between 720p and 1080p is visible to a person with 20/20 vision. The eye cannot perceive 720p worth of pixels at once, but in the small spot the center of a person's vision is on, pixel density matters a lot.
mbell 15y ago
I'm not really sure what your trying to say but the stream is decompressed at the cable box or at the the over the air HD receiver. HDMI 1.3 and 1.4 support up to 10.2Gb/sec bandwidth. The video is not compressed, the audio may or may not be. So why would you think that there isn't 720p x 60fps being sent to the tv? The max video you can get through HDMI is 4096×2160p24 @ 24bit color completely uncompressed which is several times the bandwidth needed for 1280x720p60 @ 24bit color.

dpark 15y ago

Maybe because resampling and interpolation are more damaging to lower-resolution streams? Also, depending on the video source, there might very well be a 720p x 60Hz signal being sent to the TV.

jpdoctor 15y ago
> 720p x 60Hz signal being sent to the TV. Let's do the arithmetic: 720p is 1280x720 pixels RGB = 24 bits/pixel 60 frames/sec 1280x720x24x60 = 1.3 Gbps For comparison: Full broadcast HD is around 15 Mbps Why people think they can see full 720p worth of information is beyond me. EDIT: Pay attention to the last sentence and the posts above. Of course I don't think people can see 1.3G worth of info. Again: Why people think they can see full 720p worth (=1.3G) of information is beyond me.
- agscala 15y ago
  If you don't think it's compressed, you're kidding yourself
- dpark 15y ago
  > 1280x720x24x60 = 1.3 Gbps So your argument is that compression doesn't exist? Do you also listen to 128kb WAV files and argue that they are equivalent to 128kb MP3s? > Why people think they can see full 720p worth of information is beyond me. From a distance of about 8 feet on a TV about 50 inches in size, the difference between 720p and 1080p is visible to a person with 20/20 vision. The eye cannot perceive 720p worth of pixels at once, but in the small spot the center of a person's vision is on, pixel density matters a lot.

mbell 15y ago

I'm not really sure what your trying to say but the stream is decompressed at the cable box or at the the over the air HD receiver. HDMI 1.3 and 1.4 support up to 10.2Gb/sec bandwidth. The video is not compressed, the audio may or may not be. So why would you think that there isn't 720p x 60fps being sent to the tv? The max video you can get through HDMI is 4096×2160p24 @ 24bit color completely uncompressed which is several times the bandwidth needed for 1280x720p60 @ 24bit color.