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Bit extension adapter for computer graphics

  • US 5,408,249 A
  • Filed: 11/24/1993
  • Issued: 04/18/1995
  • Est. Priority Date: 11/24/1993
  • Status: Expired due to Fees
First Claim
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1. A computer graphics interface positioned in series between a data acquisition system and a monitor for displaying gray scale images on the monitor, the monitor having a plurality of separate inputs, the interface comprising:

  • a. a discrete array of n-bit digital bytes;

    b. a processing unit to receive x-bit gray scale data where x is greater than n, the processing unit stores the x-bits of gray scale data among the n-bit digital bytes, the most significant bit of the x-bit gray scale data being stored in the first digital byte and less significant bits being stored in subsequent bytes;

    c. a digital to analog converter for converting the n-bit digital bytes into a plurality of analog signals, one analog signal for each monitor input, each digital byte determining the amplitude of an associated analog signal and being capable of encoding 2n different analog signal amplitudes;

    d. an interface input for receiving the analog signals;

    e. a divider for reducing a second of the analog signals to produce an augmented signal;

    f. a summer for adding a first of the analog signals and the augmented signal to produce an enhanced signal; and

    g. means for conveying the enhanced signal to each of the plurality of monitor channels.

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