Video interface system and method

A system for producing an interlaced video signal from a noninterlaced graphics signal from a computer, comprising:

• a processor;
• a graphics system interconnected with said processor;
• and
• a video interface configured to receive a digitized noninterlaced graphics signal from said graphics system and to convert said graphics signal into an analog interlaced video signal, wherein said video interface comprises:
• an x-filter configured to receive said graphics signal and configured to scale an x-dimension of an image represented by said graphics signal;
• a y-filter connected to said x-filter, said y-filter configured to scale a y-dimension of an image represented by said graphics signal;
• a cache connected to said y-filter, said cache for receiving data from said y-filter at a first rate and for providing data to said y-filter;
• a field memory for receiving data from said cache at a second rate that is slower than said first rate;
• and
• a video encoder for receiving data from said field memory at a third rate that is slower than said first and second rates and for providing said analog interlaced video signal.

A method for producing an analog interlaced video signal from a computer having a processor interconnected with a graphics system, comprising the steps of:

• receiving a noninterlaced graphics signal from the graphics system;
• storing said graphics signal at a first rate in a cache;
• transferring said graphics signal from said cache at a second rate that is slower than said first rate to a field memory;
• transferring said graphics signal from said field memory at a third rate that is slower than said first and second rates to produce a video signal;
• and
• converting said noninterlaced graphics signal into said analog interlaced video signal.