Comcast cable boxes for high-definition television subscribers work with a high-definition media interface, or HDMI, cable to deliver digital picture and sound to an HDTV set, including all Panasonic models. The HDMI cable carries HD video and multichannel audio signals through one cord connected from the Comcast box to your Panasonic HDTV. Comcast HD cable boxes feature on-screen menus and programming, so you can install one and be watching shows in a few minutes. Writer Bio
