Jeg sammenlignet to tver på shg.no as:
Samsung LE40F71B LE40N71B
640 x 480i 640 x 480i
640 x 480p 640 x 480p
720 x 576i 720 x 576i
720 x 576p 720 x 676p
1280 x 720p 1280 x 720 p
1920 x 1080i 1920 x 1080i
1920 x 1080p
Så hva forskjellen mellom 1920 x 1080i og 1920 x 1080p? Altå i og p ene??
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Tråd: Foskjellen på p og i?
10-22-2006, 14:30 #1
Foskjellen på p og i?
10-22-2006, 14:36 #2
10-22-2006, 14:38 #3
Hentet fra Wikipedia:
1080p is the shorthand name for a category of video modes. The number 1080 represents 1,080 lines of vertical resolution, while the letter p stands for progressive scan or non-interlaced. 1080p is considered an HDTV video mode. The term usually assumes a widescreen aspect ratio of 16:9, implying a horizontal (display) resolution of 1920 dots across and a frame resolution of 1920 × 1080 or over two million pixels. The frame rate in hertz can be either implied by the context or specified after the letter p (such as 1080p30, meaning 30 frames per second).
1080i is the shorthand name for a category of video modes. The number 1080 stands for 1080 lines of vertical resolution, while the letter i stands for interlaced or non-progressive scan. 1080i is considered to be an HDTV video mode. The term usually assumes a widescreen aspect ratio of 16:9, implying a horizontal resolution of 1920 pixels and a frame resolution of 1920 × 1080 or about 2.07 million pixels, and a field resolution of 1920 × 1080 / 2 (because it's interlaced) or about 1.04 million pixels. The field rate (not the frame rate) in hertz can be either implied by the context or specified after the letter i. The two field rates in common use are 50 and 60 Hz, with the former (1080i50) generally being used in traditional PAL and SECAM countries (Europe, Australia, much of Asia, Africa), the latter (1080i60) in traditional NTSC countries (e.g. United States, Canada and Japan). Both variants can be transported by both major digital television formats, ATSC and DVB.
The progressive-scan versions of the 1080-line resolution is known as 1080p. Current digital television broadcast systems and standards are not equipped for 1080p50/60 transmission. Also, the majority of consumer televisions offered for sale are currently not equipped to receive or decode a 1080p signal at any frequency. It is less bandwidth-intensive to broadcast a movie at 1080p24 than 1080i60, since 20% less data would be transferred. In addition, when the source material is 24 frames per second, as are most films, it would be easy to convert a 1080p24 broadcast to an NTSC 1080i60 format using a 3:2 pulldown process (see telecine). Moreover, displaying a p24 broadcast on an i50 system (such as PAL) requires the speed of video and audio be increased by over 4% (to 25 frames per second).
Therefore a hybrid is often used for movies and the like: the frames (25 or 30 per second) are segmented into two interlaced fields with equal time index (psf, progressive in or with segmented frames). The deinterlacer has to perform a simple weave only. This ensures compatibility with 1080i50/60 with only little less coding efficiency than 1080p25/30 and half the bandwidth requirement of 1080p50/60, but the SDTV problems of PAL speed-up and Telecine judder remain.
It is less efficient to transmit any signal with a frame rate significantly higher than that of its source, which is 24fps for movies, however frame differencing in the compression standards used for HDTV transmission greatly reduce the wasted bandwidth in these cases.
Microdisplays (DLP, LCoS, and LCD rear-projection) and other fixed-pixel TVs, including plasma and LCD flat-panel, are inherently progressive in nature, so when the incoming source is interlaced, as 1080i is, they convert it to progressive scan for display.
10-22-2006, 16:02 #4
hmmmm javel, ser ut som p er bedre enn i da. Men i hvilket format vil tv-signalene bli sent i framtiden (HDTV), 720p, 1080p,?
10-22-2006, 18:58 #5Opprinnelig postet av trondwiii
10-22-2006, 19:05 #6Opprinnelig postet av 123sub
Finnes det 32" LCD TV med 1920 x 1080p?
10-22-2006, 19:19 #7Opprinnelig postet av 123sub
10-22-2006, 19:49 #8Opprinnelig postet av trondwiii
10-22-2006, 23:06 #9