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Sampling analog video signal for secondary images

  • US 5,838,385 A
  • Filed: 08/30/1996
  • Issued: 11/17/1998
  • Est. Priority Date: 08/30/1996
  • Status: Expired due to Fees
First Claim
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1. A method of providing pixel data from a luminance component and at least one chrominance component of an analog video signal, for a secondary image within or adjacent to a main image having a main image sample rate, said secondary image being displayed by a display device having a staggered pixel array, comprising the steps of:

  • sampling each of said components of said analog video signal at a rate of 2/n(h) times said main image sample rate, where 1/n(h) is the horizontal scaling factor of said secondary image and n is one-half the number of rows in said main image, thereby providing a stream of luminance samples and at least one stream of chrominance samples;

    selecting, from said streams of samples, a first pattern of samples for even rows of said staggered pixel array, wherein every other sample is a luminance sample and every other sample is a chrominance sample; and

    selecting, from said streams of samples, a second pattern of samples for odd rows of said staggered pixel array, wherein every other sample is a luminance sample and every other sample is a chrominance sample, and wherein said luminance samples of said first pattern and of said second pattern are offset by one sample.

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