Synchronized multiple format video processing method and apparatus

  • US 6,118,486 A
  • Filed: 12/31/1997
  • Issued: 09/12/2000
  • Est. Priority Date: 09/26/1997
  • Status: Expired due to Term
First Claim
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1. Apparatus for processing an input video signal having one of a plurality of display formats to produce an output video signal suitable for use by a display device, said display device utilizing a fixed frequency horizontal deflection signal and a vertical deflection signal, said apparatus comprising:

  • a format converter, for selectively adapting at least a horizontal display format of said input video signal to a horizontal display format defined by aid fixed frequency horizontal deflection signal;

    a frame rate converter, coupled to said format converter, for selectively adapting a frame rate of said input video signal to a frame rate of said display device;

    a raster generator, for generating, in response to a raster clock signal, said fixed frequency horizontal deflection signal and said vertical deflection signal, said vertical deflection signal having a frequency defined by a vertical display format of said output video signal; and

    a clock circuit, responsive to a program clock reference (PCR) associated with said input video signal, for producing a system clock signal and said raster clock signal, said raster clock signal being generated by frequency scaling said system clock signal.

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