Retailspice.com

The optimum TV screen size is directly related to the available viewing distance – but there are other factors as well that need to be taken into consideration.Sit too close to your big screen TV and you will be able to see the image build-up structure

When you buy a DVD for a Home theretre system it will be always confusing which sound format to select. In some cases movie makers release both versions together. But again you will be confused which sound format to be selected to get perfect sound effect to enjoy maximum out of your investment. Here is a comparison study by expert Andrew Ghigo.

Dolby Digital and DTS Digital Surround - Identifying the main differences between these multichannel sound formats

Many audiophiles and home theater enthusiasts argue that DTS surround sound formats can deliver higher quality audio in comparison to their corresponding Dolby formats, with improved dynamic range, better representation of subtle detail in audio content, and improved signal-to-noise ratio.

Partly, this reasoning arises because DTS surround sound is usually encoded at a higher data rate than Dolby Digital and its lineup of associated formats.

This is more than understandable. We are dealing with lossy compression techniques. A higher bit-rate for the same format should normally implies superior sound during playback, as less compression in the encoding process should..

It is all an issue of Image Resolution

There are currently a number of different HDTV formats as adopted by the Advanced Television Systems Committee (ATSC), based on 720p, 1080i, and 1080p - using refresh rates that vary between 24 Hz and 60 Hz.

The main difference between these HDTV formats is one of image resolution.

The 720p is on the lower-end of the scale with an image resolution of 1280 pixels by 720 lines. The other two formats both support 1920 pixels by 1080 lines. In other words, both support the same image resolution but there is a significant difference in the way the 1080i (interlaced) and the 1080p (progressive) formats build up the image.

Surely, image resolution in fixed-pixel displays is a very HOT topic with many HDTV buyers. For many, the obvious choice is to opt for the latest 1080p HDTV - also referred to as ultra-HD or full-HD by some manufacturers ....

By Andrew Ghigo
Though both LCD and plasma displays come in the form of slim flat panel displays, yet from a technology perspective, these two flat panel displays process the image in a totally different manner.

Plasma uses a matrix of tiny gas plasma cells that are charged by precise electrical voltages to emit light and hence to create the picture image. Liquid Crystal Displays (LCD) panels - work by trapping a liquid crystal solution between two sheets of polarized glass. When an electric current is passed through the liquid crystals, they change the polarization of the light passing through them in response to the electric voltage – as a result of which, more or less light is able to pass through the polarized glass on the face of the display.

DTH operators are planning to offer high-definition TV set-top boxes to customers.

It will offer you a picture resolution which is as good as a 35mm movie screen and far superior to what you are watching currently. In addition to that, you will also listen to CD-quality sound.

It will also offer you a widescreen format which ensures that cinema movies shown on TV do not come with the jarring black bars on the top and the bottom of the screen.

High-definition television (HDTV) is all set to make an entry into India by the end of this year. Direct to home operators (DTH) . Dish TV and Reliance Communications. are planning to offer HDTV set-top boxes to customers, of course at a premium, to have a glimpse of HDTV channels on their television sets.