Technically speaking, HDMI (which stands for High Definition Multimedia Interface) is a global connectivity standard developed by a consortium of major electronics manufacturers including Hitachi, Panasonic, Philips, Sony, Thomson (RCA), Toshiba, and Silicon Image. HDMI establishes a "future-proof" foundation for the transmission of high-definition video and multichannel audio among a wide variety of audio, video and computer products. Today, more than 800 companies have adopted the HDMI standard and are building HDMI into their products.
For you, this means that there is a high-quality, single-cable, all-digital solution you can use to interconnect all the components of your home entertainment system, regardless of manufacturer. And because HDMI is a two-way platform, it also means that your individual components can "talk" to each other, exchanging critical information that allows optimizations and adjustments to be made automatically for easy, trouble-free operation of multiple components.
Incase you don't wanna read that
If you don't have an HDMI cable, your lifes over.
Edit: Requesting a lock, no clue where this thread has gone ^