What happens when you watch SDTV on HDTV?
6 This difference occurs due to the main difference in the resolution provided by the standard TV definition (SDTV) and high -resolution television (HDTV). Since the resolution and the total size of each display type is quite different, the SDTV signal is effectively displayed on HDTV. This means that the HDTV SDTV lacks high HD image quality and may look worse than the SD display due to the difference in two displays. In essence, this problem is how SD and HD displays are designed and created, specifically with regard to the number of pixels used in each system. Pixel or picture of the element, refers to the individual points of the color light, which forms the overall picture displayed on the TV screen. SDTV usually has about 480 rows of pixels from top to bottom and 640 or 704 pixels columns from left to right on the screen.
On the other hand, HDTV can have much more pixels, with 1,080 rowsPixels from top to bottom and 1,920 pixels columns over the screen becomes a minimum standard. Even this much larger number of pixels is covered with new displays that have thousands of other pixels in each direction and create TVs and displays with incredibly sharp and realistic images. Formats such as "Ultra High Definition Television" (UHDTV) can produce screens with a resolution of 16 times larger than current HD standards.
The problem of watching SDTV on HDTV occurs when the SD image is transferred between two formats. The TV signal, even a digital signal, for SDVJE designed to display on a screen with a resolution of about 640x480. When this signal appears on the 1920x1080 screen, the image must either seem very small on the larger screen or to enlarge.
This magnification of the size that occurs when viewing the SDTV on HDTV will eventually create a lower image quality on this HDTV. Many TVs "Upscale" SD image to make it seem better even if it still does not reachHD signal image quality. Due to this difference, the SD signal may eventually appear better on SDTV than on HDTV, although the quality of the HD view signal on HDTV is much better than any image displayed on the SDTV.