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What is digital TV? When we talk about digital television generally refers to digital television. Digital TV may use different platforms: cable and satellite or terrestrial. Each platform uses the transmission system. How can we receive digital signals? We need a digital receiver, either built into a TV or an autonomous set-top box connected to the age of television.
But there is no single standard for digital televisionbroadcasting. For digital terrestrial television, there are four major and incompatible transmission (modulation) standards. For example, in North America uses ATSC, DMB-T, used in China, Japan and Brazil are using ISDB-T and in Europe, Russia, India, Australia and many other countries use DVB-T. In addition, there are many codecs (algorithms) that can be used to compress audio and video: MPEG-2 and MPEG-4 are the most commonly used video compression standards the most.This means that you must have a digital receiver compatible with standard transmission and codecs used in your country.
However, this variety of rules is nothing new. We had similar situations with analogue television. The following parameters of the analogue television broadcasting may have different values:
Number of lines
Frame rate
Channel bandwidth
Bandwidth
Travel Audio
Video Modulation
audio modulation
Color System
This meansyou had to have a compatible TV with the standard used at home to watch television. However, almost all TV sets most recent are capable of receiving analog and show the common standards used worldwide. These rules have been defined analog many years, remained unchanged and no new standard for analog television said. This means a stable for decades.
Now that has changed. In the digital world is very easy to invent a new method or algorithm, better andefficient compared to the previous one. A typical example is the transmission standard DVB-T. Is a successor of DVB-T2, which is incompatible with the old standard DVB-T, but offers greater capacity, robustness and flexibility. MPEG-4 is also a method of compressing more recent and better quality compared to MPEG-2.
This means that digital technology and continue to develop new, better and more complex (incompatible) standards will come. A practical consequence of this rapid development is that youhave plasma TV or LCD to display the image and an additional set-top box compatible digital standards used in their country. Television is likely to last 7 years or more, while the set-top box will have a shorter life.
Thanks To - Sony STR-DH700 AV Receiver
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Is there a difference in image quality between expensive HDMI cables in electronics stores retail $ 99.00, and generic brand HDMI cables that you can almost buy with the change stuck between the couch cushions? To find out, all you need do is look at what an HDMI cable. HDMI is a digital signal protocol used to transmit video and audio signals, ie between the HDMI source (cable, satellite receiver, Blu-ray, etc.) and television, there is only onedigital signal.
Digital signals transmitted using binary information. This means that the TV is equipped to answer a question when it receives a signal: Is this a 1 or 0? It's that simple! With digital cables, either get the signal or not. There are "between" - no signal degradation that can come with analog signals. If electromagnetic interference or radio frequency interference, it is unlikely that TV will be the error of a 1 by a 0 or 0 to 1. Ifis concerned about EMI and RFI interference, you can get a lower cable AWG. The higher the AWG number is the major portion of the cable. Under AWG cables are ideal for installations where the wall and long cables.
Brand or not, an HDMI cable will give the same results. While the cable complies with the HDMI specification, it is good to go. From now on just go with the cable from the cheaper generic brand to avoid burning your whole wallet!
Friends Link - STR-DH800 Onkyo TX-SR607
