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hi, some newer hdtv's use cablecards and idcr-cablecard. so you plug co-ax directly into your hdtv set. if co-ax is able to carry an hdtv signal all the way from the cable company's local office to your home why is a 3-foot hdmi cable important.
how would the picture quality be as good when plugging a dirty co-ax into your tv without an hdmi cable ?
the arguement would then be if you used the cable company's provided set-top box then an equevelent picture quality can be obtained by connecting the cable box to the tv via co-ax.
Connecting a tv to a cable box via coax gives you only analog (which will be gone soon next year), and digital SD (Standard Definition). When analog tv goes off air, all thats left is digital SD through coax and HD. Although coax carries the HD signal as well, you do need a an HDMI cable in order to view HD channels, because the coax on the tv can only accept analog and SD, not HD content.
It is, but the HD signal is still carried to the cable box via coax, which the coax is connected to a cable system, from the cable company, fibre optic or a coax connected to the LNB of a satellite dish, (sat. receiver). The only way to utilize the HD signal is to have an HDMI connection from said box to said tv that supports HDMI (non-crt).
only analog (which will be gone soon next year), and digital SD (Standard Definition)
I just found out the other day that the above statement (which I also had been making) is not entirely true. All the high-power analog TV stations are required to switch to digital, but the low-power local stations are not required to go digital (and most won't, because they can't afford it)... Apparently the low-power ones have always been lumped together into a smaller part of the spectrum, and that small part was NOT re-allocated with the rest!
Unfortunately, my digital convertor box blocks the antenna (even when off), so I can't get analog at all now that I switched.
HD is digitised and encoded onto a carrier stream on the coax requiring extensive decoding to get it back (what the cable box does)
the HDMI cable is annologus to the DVI cable that conects your graphics card to the monitor
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