However, the image quality is equal to that of NTSC and most people won't notice any problem. For some types of content, especially high-resolution images (such as those generated by 3D animation), HDTVs using a PAL system may show a slight "flicker" tendency. NTSC refreshes the screen 30 times a second, while PAL systems do so 25 times a second. The primary visual difference between NTSC and PAL systems for high definition TVs (HDTVs) is in the refresh rate. There is still a broad analog system in place for television, so even though digital signals and high-definition (HD) are becoming the universal standard, variations remain. ![]() Five frames must be removed per second or the action may seem unnaturally slow. The opposite is true for an NTSC movie converted to PAL. If a PAL movie is converted to an NTSC tape, 5 extra frames must be added per second or the action might seem jerky. More lines means more visual information, which equals better picture quality and resolution.Ĭonversion from NTSC to PAL and vice versa PAL television broadcasts have 625 lines of resolution, compared to NTSC's 525. PAL may have fewer frames per second, but it also has more lines than NTSC. PAL televisions produce 25 frames per second that causes motion to be displayed faster. PAL lines go out at 50 fields per second (since Europe uses a 50 hertz power supply), i.e., 25 alternating lines. These technical details play no direct role (except as subsystems and physical parameters) to the decoding of the signal.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |