Most widely used as sources of sound in home theater today received a DVD-players - the sound of a DVD has up to six channels. The video signal is a standard TV or VHS-player, of course, can be used in home theater, but that brings the sound. Stereo quality is not enough: there are only two channels. In the future we can expect a boom high-definition video - HD {High Definition). While the conventional TV picture format is PAL or SECAM resolution 720h576r, HDTV demonstrates the program with a resolution up to 1920 1080, that is such an image is 5 times more detailed and precise. On the market for satellite broadcasters appeared HDTV, for example, "NTV-Plus. Companies Toshiba, Sony (both - Japan), Philips (Netherlands), Samsung (Korea) presented the first devices to play high definition video. On special media released a few dozen movies. While the war continues the two competing formats: HD DVD discs can hold 1 B GB of data, record players for them cost $ 500; discs Blu-Ray - up to 25 GB (although each can be written only a two-hour video with the highest quality HDTV), but players for them are more expensive, at $ 960. And recently, the company LG (Korea) has released model VN1OO - this is the first hybrid player, working with carriers of both formats (the price is $ 1.2 million). The image is printed on an ordinary or a special projection TV or projected on the screen using a special device - the projector. TVs come in CRT (CRT), liquid crystal (LCD), plasma (PDP). Device with a diagonal of more than 20 inches usually have a 16:9 screen, which corresponds to the standard aspect ratio of most DVD-movies. CRT TVs produced by many companies, however, because of their considerable size models with big diagonal, which are better suited for home theater, the producers almost do not release. LCD TVs - a product NAD (UK), Fujitsu Siemens, Loewe (Germany), Hantarex (Italy), BenQ (Taiwan), Hitachi, Panasonic, Sanyo, Sony, Sharp, Toshiba (all Japan), LAVA Vision (Sweden ), LG, Rolsen Electronics, Samsung (all-Korea), Thomson (France), ViewSonic (USA), Philips. Standard LCD-model 42-inch is worth about $ 1,9 thousand Plasma TVs manufactured by Fujitsu, Hitachi, JVC, Nakamichi, NEC, Pioneer, Sony, Toshiba (all - Japan), Fujitsu Siemens, LAVA Vision, LG, Loewe , Philips, Panasonic, Samsung, Thomson. The standard model PDP-42-inch costs about $ 1,5 yew. Projectors build an image using one of three different technologies: CRT, LCD or DLR is based on the use of micromirror matrix. They allow you to create a "picture", the size of which is still inaccessible for TVs up to 10 m, but for this they need a screen (almost all as a "big brother"). These devices are relatively expensive (about $ 770) and are a fixture equipped with all the rules of home theater. Projectors have its drawbacks posravneniyustelevizora-mi.
No comments:
Post a Comment