Digital and High Definition TV: Moving Forwards into the Future

Television Evolution - Monochrome to High Definition TV

Televisions have evolved many times since they were first brought into the public eye in the 1930s. The first sets had screens that were only a few inches wide and could only display grainy black and white pictures. Throughout the ages, until the present day, we have seen the change from small to big TV sets. We have also seen the development of the picture quality and the change from monochrome to colour televisions. All of these advancements took place from the 1930s, when televisions were first introduced to the world, to the 1960s when color TV sets were widely available. Recently, however, we have seen further developments in television technology which have further stretched the abilities of your average set. The method used to create the image has changed as new inventions were brought to light. The initial have enabled the production of larger screens which can still fit into most homes and offices. With a larger screen came the idea to create a better quality image and so high definition television was born, which offers a clearer picture to the viewer. Other devices have adapted and evolved along with the television. For example, the DVD player was created from the VCR and lets us watch better quality movies and television shows without the quality degrading over time. This evolution will continue to grow and to reveal exciting new television capabilities and functions to us.

The Growing Television Screen

While looking around the audio visual department in the shopping mall, it is hard to believe how much the television has changed since it was first mass produced over seventy years ago. We have come a long way since then. The first screens were about the size of a modern day business card. TV sets nowadays come with a screen size of up to fifty-two inches. That is such a huge improvement. Imagine what we could do over the next seventy years. And, just because the screen size is increasing does not mean that the overall television size is increasing as well. On the contrary, if you do not have much room, you need not purchase a small TV for your home. Most big screen televisions nowadays are either LCD or plasma sets, and are very thin. Some models can even be hung on your wall, saving you more space. This means that a big screen TV can now fit into any home or office regardless of space requirements. Plus, slimmer, more stylish plasma and LCD TV sets are slowly phasing out bulky cathode ray television sets. Of course, with the development of screen size, it has been necessary to generate higher quality images as well. A set with a large screen should be a high definition TV so that you can view images in a much better quality than on standard definition television. In this way, you get the most out of your set, making it more worthwhile to spend a bit more money on the larger screen.

Riding the Digital Airwaves

As well as the quality and size of the humble television set increasing, new developments have been made in the broadcasting process itself. The rise of digital transmissions has resulted in a shift from the more traditional analogue broadcasting. This means that all around the world, TV channels can now transmit digital signals which can hold more information than their analogue counterparts. This has two very important implications. The first is that the programs broadcast can be in high definition which means that you will be able to view a better quality of picture. Of course, you will need a proper high definition set equipped with HDMI ports to be able to view these quality images. These ports are able to transfer more information rapidly to your set. The second implication is that you can now receive more channels within the same amount of bandwidth. This can give you more choice in what you watch and offer you more entertainment on your high definition TV. With the proper accessories, you can also enjoy the greater number of high quality programs even if you are not at home. Before, you had to use a VCR to allow you to watch programs you would have otherwise missed because you were out. Now, we have moved along technologically and the DVD recorder has stepped up as the new method of saving your favourite television programs. Even without this, it pays to move forward with the times and purchase a high definition television set that is equipped to receive digital signals.

Getting the Best Quality Images at Home

High definition pictures are images displayed on your television screen that look clearer and smoother than the standard definition that was available previously. They work by showing more lines of information on your screen and hence can show more detail than previously achievable pictures. The images on a standard TV set consist of about 576 lines of resolution (those lines of information) in Britain. Currently, the maximum available resolution on a high definition set is 1080, about twice that available on regular sets. Knowing about the resolution is not as simple as that though. There are two different formats available on HD TV. These formats are called interlacing and progressive scanning. Progressive scanning gives a better quality of picture on a large screen television and is usually denoted by the letter p after the resolution. Interlacing shows half the lines of resolution first and half afterwards and is usually denoted by the letter i. When searching for high definition TV sets, you should notice specifications like 1080p and 1080i while looking at the details. 1080p actually gives a better quality image than 1080i, so do not be fooled by the numbers. When you have worked out the details of the different resolutions, you should take a look at the range of accessories available for the new high definition sets. For example, an upscaling DVD player allows you to watch regular movies on your HD television with a better quality of image. You can compliment your quality images with additional devices to make your viewings even more enjoyable.