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Signal processing system

  • US 4,839,649 A
  • Filed: 07/09/1987
  • Issued: 06/13/1989
  • Est. Priority Date: 05/22/1984
  • Status: Expired due to Fees
First Claim
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1. A method of processing analog signals, comprising the steps of:

  • converting the analog input signals into digital data; and

    receiving the converted digital data at periodic sampling intervals;

    compressing the received converted digital data values, said step of compressing including the substeps of;

    storing a plurality of delta modulation modes, each mode including a plurality of predetermined prediction values;

    comparing each received detected data value with the predetermined prediction values of a selected mode;

    determining the sample point value of each compared digital data value in accordance with a selected one of the plurality of prediction values of the selected mode; and

    selecting one of the plurality of modes for comparing the presently received data in accordance with the selected one of the prediction value of previously received data.

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