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Data compression system and method for audio signals

  • US 4,802,222 A
  • Filed: 08/25/1987
  • Issued: 01/31/1989
  • Est. Priority Date: 12/12/1983
  • Status: Expired due to Fees
First Claim
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1. A signal compression system for processing a stream of fixed length digital sample signals comprising,linear digital compression filter means responsive to the stream of digital sample signals for generating a stream of compression-filtered sample signals, the Z-transform of the digital compression filter means having one or more zeros on the unit circle at one or more of the following angular positions;

  • 41.41°

    , 60°

    , 75.52°

    , 90°

    , 104.48°

    , 120°

    , 138.59° and

    180°

    , and not having zeros at any positive angular positions other than 0°

    , 41.41°

    , 60°

    , 75.52°

    , 90°

    , 104.48°

    , 120°

    , 138.59° and

    180°

    .

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