
Originally Posted by
Mabubeezareel
To break it down a bit more simply - each of your devices, whether it be a cable box, xbox360, PS3, etc, has multiple ways by which it can transmit video and audio. These are referred to as outputs.
The specific type of output that Cephius is referring to is HDMI, which is capable of carrying both the video and audio signals in a single cable. HDMI is the new standard for transmitting video/audio, supports the most recent surround sound formats, as well as is capable of carrying high-resolution video signals. All other types of outputs have separate cables that must be utilized for carrying video and audio. The most easily recognizable of these is composite, where the yellow cable is used for transmitting video, while the red/white cables are for stereo audio.
Now, taking Ceph's example a bit further, a HTB system is not likely to have multiple HDMI inputs on it. You may very well have more devices that can use HDMI than you have inputs on the receiver. In this case, you could consider using an HDMI switch box. In this case, the switch box would act as a "hub". You would plug all of your HDMI cables from your devices into the hub, and then plug the hub into the receiver. Then, you select which device you'd like to use on the hub.
That's also exactly why I would recommend against going with a very low-end HTB system, since the receiver is not likely to have multiple HDMI inputs on it, forcing you into an alternative solution like a switch box anyway. Standalone receivers, even on the low end, all have multiple HDMI inputs. I think even the ones that come with the Onkyo HTBs have at least 2.