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What does HTPC mean?

HTPC means Home Theatre Personal Computer

An HTPC is a computer equipped to play video footage and audio. An HTPC is usually used in a home-like atmosphere for displaying movies, it is a home cinema. You can tinker with a HTPC yourself, but you can also buy them ready for you. It is often a small and quiet device that has enough power to play movies. An HTPC offers a flexible system that can play more than just movies: with the right software and settings it can serve as a server, or download movies. Many HTPC systems use the free XBMC software.

What does DTS mean?

DTS means Digital Theatre Systems

DTS is high quality digital multichannel sound which is used in many cinemas. The sound is true to nature, the amount of information per second is much higher than the older Dolby Digital. DTS is used both professionally and for the consumer (stored on DVD or CD). DTS is a noise reduction system by reducing frequencies that are not perceptible to humans (DTS takes away less than Dolby Digital). The first film with DTS was Jurassic Park from 1993.