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Method for image compression on a personal computer

  • US 5,287,420 A
  • Filed: 04/08/1992
  • Issued: 02/15/1994
  • Est. Priority Date: 04/08/1992
  • Status: Expired due to Term
First Claim
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1. A method of compressing color image data signals, comprising the steps of:

  • a) receiving, under foreground control of a processor and in real time, a sequence of the color image data signals representing a color image;

    b) digitizing the data signals, thereby forming digitized data signals;

    c) compressing the digitized data signals in real time to a first compression ratio using a first data compression algorithm under foreground control of the processor, thereby forming first compressed image data;

    d) storing the first compressed image data in real time in a first quantity of digital memory under foreground control of the processor;

    e) upon completion of step d), retrieving from storage the first compressed image data and decompressing the first compressed image data under background control of the processor, thereby forming a decompressed digital signal;

    f) compressing the decompressed digital signal to a second compression ratio under background control of the processor, thereby forming second compressed image data; and

    g) storing the second compressed image data in a second quantity of the digital memory wherein the second quantity of the digital memory is less than the first quantity.

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