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Progressive transmission of vector quantized data

  • US 5,255,090 A
  • Filed: 11/19/1991
  • Issued: 10/19/1993
  • Est. Priority Date: 11/19/1991
  • Status: Expired due to Term
First Claim
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1. In a tree search, variable rate vector quantization data compression system of the type the organizes an image frame into blocks of input data, and converts each block of input data to a multi-dimensional input vector, and having a codebook with plural levels of codevectors, each codevector being representative of a possible input vector, the codevectors at each successive level representing possible input vectors with greater accuracy than codevectors at a preceding level, each codevector having an associated address, a method comprising the steps of:

  • a) for each input vector, automatically selecting a plurality of codevectors, each codevector being selected from a different level of the codebook;

    b) for a first one of the selected codevectors, transmitting data indicative of the address associated therewith; and

    ,c) for each of the other selected codevectors, transmitting data indicative of at least a portion of the address of each other selected codevectors that, in combination with previously transmitted address data, uniquely identifies each other selected codevector.

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