Getting an HDTV signal to a TV set without coaxial cable inputs will require an HDTV converter box. With many HDTV options, like digital satellite systems, an external converter box or receiver is required. The two best ways to hook up the converter box to your HDTV are either with a component video cable or an HDMI cable. These connections were designed for HDTV signal transfer. Neither one of these cables carry the audio, so you will need to add separate RCA connections for the audio. Writer Bio
