There are several types of cable you can use to connect a computer or a set-top device to a television or computer. Two examples are DVI (Digital Visual Interface) and composite cables.

Composite Basics

1. A composite cable is an analog cable that combines (composites) all three color channels--red, blue and green--into one cable. It also includes two audio cables for stereo audio.

DVI Basics

2. DVI cables are usually used for flat-panel displays such as monitors and televisions. These displays may not have a DVI interface. A non-flat-panel TV rarely has a DVI interface.

Quality Comparison

3. Since composite cables do not separate their color channels, the image is less crisp than a DVI cable. DVI can also transmit high-definition video, while composite cannot.

Connection Options

4. A standard computer video card does not have a composite interface. You will usually have to obtain an external conversion device to connect composite cables from a computer to a display device.

Cable Cost

5. If you only need a basic video connection, a composite cable will be much cheaper, since its materials and construction are less expensive.