Have u wondered abt HDTV? Now wat is that if u ask do skip this post. But for the record I'll tell u that it means High Density TeleVision. For those who keep getting bombarded with ads about HDTV. Have u tried goin to a store wich sells these. You may find that the clerks really don't know much about them. And tho u some across one that looks interesting, u mite find description is nothing if not confusing. For example: Consider a 42-inch HD LCD set where the specifications say "a resolution of 1,920x1,080. It is compatible with 480i, 480p, 720p, 1080i, and 1080p ". Now wat does the i and p mean? Let alone the other numbers. It is said to be compatible to NTSC (recognize that ??), ATSC, and QAM (now there we go !!) And what is Media Connectivity?
Hmmm...I understand. So i'll let u no things as far as i hav read abt the above. I shud thank cnet for all these info.
Ok, lets start with the resolutions/outputs. 480i, 480p, 720p, 1080i, and 1080p all refer to the second half (the smaller number) of the resolution, so both 1080i and 1080p would display the resolution 1,920x1,080. Now for P. vs. I. P stands for progressive and I for Interlaced. With I, the image is made up of horizontal lines, these lines are then dived by two (every other, not top and bottom) and the information for these lines is spread over two frames of the video. This saves on storage space, and makes it easier on broadcasting companies, but with decoding of the interlaced video or fast moving scenes you'll see the horizontal lines.Progressive scan on the other hand, each frame has a complete image which it displays, this more powerful hardware to display it without stutters and requires a lot more storage space, but the image is always good.
Compatibility: NTSC refers to a technological format used by the US TV broadcaster i.e. in the UK our TV is broadcast in PAL. NTSC, is fine if one is from the USA. One need not worry about the others because everything you play will be encoded in NTSC. This is also the same for anything 'recorded' in these countries e.g. if you recorded some tv at home in the US then took the vhs tape with you to some freinds or relatives in the UK or japan it would NOT display properly if at all in their VCR, and also if you brought a vcr and/or tv with you from the USA that also would not work even if you had an adaptor for the different electrical plug that the US uses.
Media Connectivity: is quite simply a word used to say the input jacks on the rear and side or front panels. Nowadays with HDTV's there’s a lot more connections to think about. There’s you old S-Video and RGB, these are fine for standard definition video. However for HD video you'll need to use, HDMI, Component, (VGA, DVI these two are PC connectors). HDMI is one large plug (much smaller than Scart though) this will provide the best in video quality allowing you to watch in full 1080p with any interference as it is digital. Component has 5 jacks, 2 for sound and 3 for the image, but as the signal is apologue you may pick up interference.And now for one other thing you may need to know.
Contrast ratio: This is quite simply how black the blacks are and how white the whites are. So the higher the ratio the better the image. 1:500 no thanks, 1:3,000 yes please.
Now for a bit of personal knowledge. I have no idea wat ATSC means but QAM is Quadrature Amplitude Modulation, considered to be a very bandwidth efficient technique for modulation of signals. Really good but requiring high power to transmit the signals. They provide signals wich have very low error rate of reception. Well guess it wasnt a waste doin ECE. At least im pretty good on the communication front.
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