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Encoding apparatus with two stages of data compression

  • US 5,166,987 A
  • Filed: 03/29/1991
  • Issued: 11/24/1992
  • Est. Priority Date: 04/04/1990
  • Status: Expired due to Fees
First Claim
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1. A highly efficient encoding apparatus for encoding digital video data, said apparatus comprising:

  • block segmentation means for receiving said digital video data in a raster scan format and for transforming the received data into a format having blocks of pixel data;

    first encoding means for receiving said blocks of pixel data and for encoding and compressing the pixel data in each of said blocks into an approximately constant amount of encoded and compressed data in accordance with a control signal;

    second encoding means for predictively encoding and further compressing said encoded and compressed data outputted from said first encoding means and including means for generating said control signal in accordance with the amount of predictively encoded and further compressed data; and

    means for outputting said predictively encoded and further compressed data from said second encoding means.

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