I have a couple questions about video frame size and viewing. Please excuse my ignorance. Is 720 wide by 480 high the same as a regular dvd? Is this what determines the quality of the video. On my pc, the spec for a video shows this and a bitrate of 2135kbps. Another video has a datarate of 3000kbps.
Is a video resolution of 1440 x 1080 a high definition video and would you need a 24' monitor to view it properly? The data rate is 8000 kbps.
Thanks
John
Video Resolution
Re: Video Resolution
720 x 480 is standard DVD
1280 x 720 is HD
1920 x 1080 is FullHD
so 1440 x 1080 is probably the equivalent of 4:3 in FullHD.
Now as you have noticed, the quality of the video can depend on more than just it's pixel count. The higher its bitrate (that is the number of bits assigned per second to show the picture and audio etc) the better quality the video is. Most video has been compressed in some form or another to save diskspace, and some codecs (COmpression/DE-Compression) are better at picture quality while having smaller file sizes, so it can't be judged purely on its raw bitrate, i.e. You have to take into account the codec too (though a rule of thumb is that a higher bitrate means better quality videos (but also larger files)).
For you to physically be able to see all of the pixels in a FullHD video, you would need a monitor with at least 1920x1080 pixels, and as you point out, these are mostly 24" monitors (with 1920x1200 screen resolutions). However, video playback software can scale the video up or down to fill the screen size that you have, so you will be able to play back video on any screen, Which means unless you really want to, you don't need a screen that big.
Dan
1280 x 720 is HD
1920 x 1080 is FullHD
so 1440 x 1080 is probably the equivalent of 4:3 in FullHD.
Now as you have noticed, the quality of the video can depend on more than just it's pixel count. The higher its bitrate (that is the number of bits assigned per second to show the picture and audio etc) the better quality the video is. Most video has been compressed in some form or another to save diskspace, and some codecs (COmpression/DE-Compression) are better at picture quality while having smaller file sizes, so it can't be judged purely on its raw bitrate, i.e. You have to take into account the codec too (though a rule of thumb is that a higher bitrate means better quality videos (but also larger files)).
For you to physically be able to see all of the pixels in a FullHD video, you would need a monitor with at least 1920x1080 pixels, and as you point out, these are mostly 24" monitors (with 1920x1200 screen resolutions). However, video playback software can scale the video up or down to fill the screen size that you have, so you will be able to play back video on any screen, Which means unless you really want to, you don't need a screen that big.
Dan
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Re: Video Resolution
I've build many home theaters and know quite a bit about HDTV. Here's a chart to help you with video resolutions:
http://en.wikipedia.org/wiki/XGA
DVD is NTSC Standard Def (unless your Dan and in the UK where's it PAL), which is 720×480i, with an upconverter they can be scaled to any NTSC/PAL resolution you'd like (1080i, 720p, 1080p). This can be done with software or hardware (preferable). There's a big diffrence between TV and computer monitors in how the resolutions are handled, particularly with regard to the 16:9 (HDTV) vs 16:10 (computer) setting.
I've never heard of the datarate thing you're describing. Are you refering to the transfer rates of DVI vs HDMI?
1440x1080 is considered Extended Definition as it doesn't comply with the 1920x1080 needed to deliver 1080i resolutions. You would be able to do video at 720p but not 1080i/1080p.
http://en.wikipedia.org/wiki/HDTV
Resolution makes a big diffrence in the quality of the video, as does the displays native resolution. You want to output the video to the monitors native resolution whenever possible to reduce artifacts. The second most important thing is actually the camera that the video was recorded with, something you have no control over. This is why sporting events are so crystal clear while some dramas that are in "HD" are not. The quality of the camera makes a huge difference, something that wasn't noticable until HDTV became a standard.
http://en.wikipedia.org/wiki/XGA
DVD is NTSC Standard Def (unless your Dan and in the UK where's it PAL), which is 720×480i, with an upconverter they can be scaled to any NTSC/PAL resolution you'd like (1080i, 720p, 1080p). This can be done with software or hardware (preferable). There's a big diffrence between TV and computer monitors in how the resolutions are handled, particularly with regard to the 16:9 (HDTV) vs 16:10 (computer) setting.
I've never heard of the datarate thing you're describing. Are you refering to the transfer rates of DVI vs HDMI?
1440x1080 is considered Extended Definition as it doesn't comply with the 1920x1080 needed to deliver 1080i resolutions. You would be able to do video at 720p but not 1080i/1080p.
http://en.wikipedia.org/wiki/HDTV
Resolution makes a big diffrence in the quality of the video, as does the displays native resolution. You want to output the video to the monitors native resolution whenever possible to reduce artifacts. The second most important thing is actually the camera that the video was recorded with, something you have no control over. This is why sporting events are so crystal clear while some dramas that are in "HD" are not. The quality of the camera makes a huge difference, something that wasn't noticable until HDTV became a standard.