Wednesday, November 9, 2011

HARDWARE

Hardware is that component of computer that we can touch, feel and see. It is the physical part of the computer .it needs electricity in order to run smoothly. Computer is the combination of various hardware materials like monitor, cpu, keyboard, cables, motherboards, chips etc hardware parts are expensive compare to the software. The internal parts of computer are most sensible. One should be careful while checking the internal parts of computer because if one part of the computer is mismatch then computer starts to act strange and the application may not be worked properly. Hardware concludes the following contains:
TV turner card
A TV turner card is a computer component that allows television signals to be received by a computer. Most tv turners also function as video capture card, allowing them to record television programs onto a hard disk. TV turners are available as PCI-bus expansion card or USB devices. The trend is towards USB devices. In addition, some video cards double as tv turners, notably the ATA all-In-Wonder series. The card contains receiver, demodulators and an analog –to-degital converter for analog tv. Many cards are limited to the radio frequencies and video formats used in the country of sale. However, many TV turners used in computer use DSP, so a firmware upgrade is often all that`s necessary to change the supported video format. Many new tv turners have flash memory big enough to hold the firmwares for decoding several different video formats, making it possible to use the turner in many countries without having to flash the firmware.

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