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| Thread ID: 34860 | 2003-06-26 02:31:00 | ntsc and pal | yingxuan (3330) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 155245 | 2003-06-26 02:31:00 | Why does each country uses a different system?pal ntsc and secam?Why>? | yingxuan (3330) | ||
| 155246 | 2003-06-26 03:37:00 | To make life difficult :-). They started out using different standards and moving everyone over to the same one is difficult & expensive. I guess thats why we still drive on the left. |
bmason (508) | ||
| 155247 | 2003-06-26 04:48:00 | NTSC is for the americans and their region 1 dvd's. Over here in NZ we use pal for region 4. Doesn't make a world of difference as both types will play on your dvd player. |
PoWa (203) | ||
| 155248 | 2003-06-26 06:02:00 | the japanese also use NTSC, i think it has something to do with the refresh rates (for tv and PS2) but for DVD's i think its got to do with the framerates of the dvd's cos PAL DVD's have a framerate of 25 while NTSC has 29.97. So i just think its got something to do with overall quality and refresh rates, but ofcourse i could be very wrong. :) cheers, v.K |
vk_dre (195) | ||
| 155249 | 2003-06-26 07:45:00 | Pal is a later mode used in Europe and NZ has better skin color and different refresh rates | kiwibeat (304) | ||
| 155250 | 2003-06-26 08:10:00 | I won't bother typing it when others have, here is a potted explanation: A simple explanation of worldwide video systems is difficult to achieve, but such knowledge is essential when trying to understand why video and data produced in one country may not be readily used in another . When television was first introduced, all transmissions were in black and white . When color television systems were proposed, it was decided that absolute compatibility was a must: monochrome receivers must be able to produce high- quality black-and-white images from a color broadcast, and color receivers must be able to produce high-quality images from a monochrome broadcast . In 1953, the United States Federal Communications Commission (FCC) approved a system which met these standards, which was the work of the National Television System Committee (NTSC) . Thus, the official video standard of the U . S . (and Japan, Mexico, Canada, Central America, parts of South America, the Caribbean and other countries) is known as the NTSC system . Concurrently, European countries were struggling with ways to adopt color TV systems which would still support viewers with black-and-white sets . By the mid- 1960s, two more video standards were in use around the world: Phase Alternation Line (PAL) and Sequential Coleur Avec Memoire (SECAM) . PAL is used throughout most of Europe and the South Pacific; SECAM is used by France, some Eastern European countries, parts of Africa and much of the former Soviet Union . To make matters even more complicated, some countries which use PAL and SECAM do so with minor deviations, resulting in similar but not 100% compatible formats (PAL-M, PAL-N, PAL-I or MESECAM; see Appendix A for a list of PAL and SECAM countries) . At the risk of oversimplification, suffice it to say that there are many incompatibilities between the three systems . However, the most basic are in the processing of the video signal itself . All televisions display video by painting a series of horizontal lines (each line consisting two fields) across their screens . In NTSC countries, the standard TV picture is said to consist of 262 . 5 lines per field, operating at a speed of 60 fields per second (or 60Hz) . PAL and SECAM countries use a TV picture which consists of 312 . 5 lines per field, operating at 50 fields per second (or 50Hz) . Regardless of the number of lines, the first 21 or so are not used for the picture . Known as the vertical blanking interval, these 21 lines are mostly dark; they appear as the black bar between rolling pictures when the TV set's vertical-hold control is misadjusted . In North America, closed captioning is one of the earliest uses of the VBI for transmitting data . With a little effort, you can actually see the captioning data on line 21 . On a monitor whose picture has been shrunk (underscanned), or with careful manipulation of the vertical-hold control, study the top of the picture where it meets the black bar of the VBI . Line 21 is at the bottom of the VBI; nearby VBI lines may contain engineering test signals, color synchronization, teletext, time and source data, network messaging or other material . The picture usually starts on line 22, although some broadcasters use line 22 for other data . (PAL and SECAM countries carry subtitling data on lines 17-20 . ) Some would say that NTSC actually stands for Never The Same colour Twice, and that SECAM stands for Something Essentially Contrary to the American Method (France use it, could be true?) Actually in NZ we use PAL-D (Delay-line PAL) for TV . |
godfather (25) | ||
| 155251 | 2003-06-26 08:27:00 | Well it goes like this America invented color TV the NTSC system, some dude in German made a improvement to it to reduce color errors and and called it what it does PAL. The French been French had to make their system SECAM. To roughly work out which country has which system, If you think back at the time like in the 60's 70's when Color TV came out, America and all their mates went for NTSC, Europe and British common wealth countries went for PAL, France, and Russia and Russian mates went to SECAM. |
E.ric (351) | ||
| 155252 | 2003-06-27 03:51:00 | I wish nz would use ntsc WAA!!!:'( |
yingxuan (3330) | ||
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