HDTV Issues
Since the first form of HDTV was introduced in the U.S., there were groups that have a problem with this new form of technology.
Courting controversy
In 1980, the National Association of stations in the United States invited NHK, Japan’s public network, present their HDTV, Muse, the Federal Communications Commission. Because the U.S. got wind of this new technology there was a problem. In the beginning there were two groups that are adamantly against the introduction of HDTV in the U.S.: terrestrial television broadcasters and U. S. Congress.
Electronic media are terrified and the opportunity to be excluded from the HDTV market because HDTV required more bandwidth (the amount of information sent across the channel or link) a standard TV. These media are worried because the channels that have not been licensed to be able to manage the bandwidth for this new form of television. They were also concerned that, with new channels of HDTV, there would be less opportunity for all those channels to be taken by new cells, and then to fewer opportunities for career.
U. S. Congress is preoccupied with the idea of HDTV for different reasons. They see this innovation as a threat, and the Japanese are worried that Japanese companies make millions of dollars from American consumers like they did after the VCR was introduced.
Avoiding Trouble
Both of these initial problems have been resolved after the U. S. Federal Communications Commission USA, a group of American researchers and manufacturers, called the Grand Alliance to design a form fully digital HDTV. This not only helped the Americans qualify for HDTV, but HDTV digital format is allowed to be transmitted using existing channels that are already used by broadcasters.
With those issues resolved, HDTV has gained momentum and popularity. But with this popularity, HDTV issues brought to light.
Current Issues HDTV
Unfortunately, there are still unresolved issues with HDTV today. These problems include:
Cost
Bandwidth limitations
Broadcast Distribution
Compression
Interlacing problems
Money, Money, Money
Cost is an important issue for the HDTV channels and consumers. The transition to HDTV, broadcasters are usually required to buy a new camera and editing equipment. Radio and television stations have to build new towers to broadcast their signals and reconstruct the control room with new equipment that is compatible with HDTV. Transition is a feeling that few can afford broadcasters and consumers usually have the same complaint.
Buying a new HDTV can cost one thousand U.S. dollars of consumers, especially when combined with the necessary equipment. To get HDTV, you need to, or antenna, cable or satellite service to receive HD signals.
Get a clear picture
bandwidth limitations concerns. Assignments of the conventional 6 MHz bandwidth per channel and in most cases this is not sufficient for the transfer of HDTV signal. The pictures that are transmitted in analog TV typically 525 lines scanned at 29.97 Hz with a horizontal resolution of 427 pixels. But there are many recordings of HD 1050 with 600 lines of pixels, and thus the bandwidth of 18 MHz, which obviously does not fit the 6MHz channel. One solution is to transmit HD signals on new channels of 20MHz. But terrestrial broadcasters are likely to have problems with this, because it revisits the issue concerned in 1980 with the introduction of HDTV.
As
Broadcast on top of a distribution list issues for many HDTV stations are not adopted this technology yet. The fact that HDTV is still not widely available has become a problem for consumers. Although the FCC mandate that analog television will be withdrawn by 2006, to replace the HDTV, most consumers still are not convinced.
In many areas, local cable does not yet offer HDTV. So people who want HD need to invest in either satellite or antenna, and sometimes both, which can be very expensive.
Crushing down
Compression is another problem. Although more channels with more bandwidth are available, many HD signals are still too large to be through these channels, without the compressed.
Software that is used to compress the HD picture is called MPEG-2. This software is responsible for registering each image just enough without them seem to be missing elements.Many people frown upon this method of compression, due to reduced image quality. However, others argue that even with a degraded quality, HD picture is far above the average of analogue images.
Intricate lace
Interlacing can cause problems with HDTV. Interleaving is used with HDTV storage and transmission bandwidth is divided frame into two fields: one for the odd horizontal lines and other even-numbered horizontal lines.
The problem with interlaced images is that there May be an error when the two fields recombined back into a box. Many people do not like the visual effect that creates a jagged interlacing effect is often exacerbates the largest HDTV screen or monitor.
Even with problems such as high costs and distribution problems, many still claim that HDTV is here to stay and that many problems will be overcome in the near future. HDTV supporters say it’s just a matter of time before all the technical shortcomings of the process and HDTV, and high definition is becoming more popular, HDTV systems will become the most affordable and the service will be available at the end of the cable companies and local satellite provider.