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Method and apparatus for the transmission, storage, and retrieval of documents in an electronic domain

  • US 5,502,576 A
  • Filed: 08/24/1992
  • Issued: 03/26/1996
  • Est. Priority Date: 08/24/1992
  • Status: Expired due to Fees
First Claim
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1. A method for the storage and retrieval of a two-dimensional electronic image expressible as a digital array or bitmap for the purpose of interactive document processing, said method being utilized in association with a storage device having a storage medium, said method comprising the steps of:

  • writing at least a portion of the digital array or bitmap corresponding to the two-dimensional electronic image to an output memory;

    reading said digital content from said output memory;

    converting said digital content to a first analog signal as said digital content is read from said output memory;

    adding a plurality of image control signals to said first analog signal to define a format, said format defining a frame;

    selectively transmitting said first analog signal over the transmission pathway to the remote location or storing said first analog signal as at least one said frame on the storage device, the storage device being capable of receiving and storing said first analog signal on the storage medium along with a multiplicity of like frames, the storage device further being capable of randomly accessing and selectively retrieving and outputting a separate analog signal corresponding to said first analog signal stored as at least one said frame from among said multiplicity of lie frames, said separate analog signal including said plurality of image control signals;

    retrieving said separate analog signal including said plurality of image control signals from the storage device;

    stripping said plurality of image control signals from said separate analog signal retrieved from the storage device;

    converting said separate analog signal retrieved from the storage device to a digital signal;

    writing said digital signal to an input memory such that the digital array or bitmap corresponding to the two-dimensional electronic image is reconstituted in said input memory,whereby the electronic image may subsequently be utilized in one or more document processing operations including the transformation, presentation, representation, transmission, or storage and retrieval of the electronic image,wherein the plurality of image control signals includes a plurality of raster synchronization pulses and corresponding blanking intervals, at least one pilot signal, and at least one set of calibration pulses.

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