Well, let's straighten a few things first. Component video, is only video, it does not carry audio. It is an analog video signal that is capable of sending HD television formats. Digital audio is separate, and is carried via a Digital audio output (Coaxial, or optical). Your question was rather difficult to read, but If I gather what you are asking... You are using a home theater system that contains a component video output to your television. Your Television has digital audio outputs on it. Connect your component video out of your HTIB system into your television set. Your HTIB already has audio decoding inside of it. If you are wanting to connect your HTIB to your TV to use the TV speakers, you need a standard RCA audio cable to the matching component input on your television set. If you watch television over the air, or with cable directly into your set, you can connect the digital audio cable from the output on your television to the input on your HTIB.