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Method of processing signal data on the basis of principal component transform, apparatus for performing the method

  • US 5,583,951 A
  • Filed: 08/31/1994
  • Issued: 12/10/1996
  • Est. Priority Date: 03/30/1990
  • Status: Expired due to Fees
First Claim
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1. Method of compressing signals generated from and representing an image or speech on the basis of a Principal Component Transform, comprising:

  • determining an approximation of a statistically most significant eigenvector of a covariance matrix associated with signal data generated from and representing an image or speech represented in a vector space,taking an initial vector in said vector space as a first estimate;

    for each next estimate determining a linear combination of the preceding estimate and a next vector in said vector space, said next vector being weighted with a factor that depends on an inproduct of the preceding estimate and said next vector for enhancing the next estimate into a direction of the preceding estimate,upon termination of determining next estimates taking said approximation parallel to the last obtained estimate, to produce a compressed signal representing the same image or speech.

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