Inventors: Bishop, Michael D.;
Assignee: VideoLogic Limited (Kings Langley, GB)
Primary Examiner: Kostak; Victor R.
Assistant Examiner:
Attorney, Agent or Firm: Flynn, Thiel, Boutell & Tanis
A converter receives a computer graphics signal from a PC and provides from it a video signal for display or recording. Analogue RGB signals are digitised and applied to a vertical filter and rate buffer. The rate buffer needs only one to three lines of storage capacity. The received graphics signal is a VGA 640.times.480 non-interlaced mode signal, and the rate buffer halves the line rate and produces an interlaced output. Such a signal can be treated as a video signal, after reconversion to analogue form. The vertical filter provides a degree of vertical averaging to remove flicker. In a preferred store using three line-store FIFOs, input lines are applied to them in the sequence A,B,C,B,A, and so on. |
I/O Systems 
