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System for exchanging compressed data according to predetermined dictionary codes

  • US 6,088,699 A
  • Filed: 04/22/1998
  • Issued: 07/11/2000
  • Est. Priority Date: 04/22/1998
  • Status: Expired due to Fees
First Claim
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1. A method for exchanging data between a sending device and a receiving device, each device including a processor coupled to a digital data store, the method comprising:

  • the sending and receiving devices maintaining respective dictionaries in their respective digital data stores, each dictionary containing multiple data objects each cross-referenced to a different dictionary index code, where the data objects include data objects having one of the following types;

    a binary graphics file, or a binary executable program;

    in response to the sending device receiving multiple data objects for transmittal to the receiving device, the sending device;

    searching for each of the received data objects in the dictionary contained in the sending device'"'"'s store;

    for each data object present in the dictionary, obtaining a representative index code cross-referenced to the data object in the dictionary;

    the sending device composing a message for transmittal to the receiving device, the message including multiple subparts each subpart corresponding to a different one of the received data objects, each subpart comprising;

    if the corresponding data object is not present in the dictionary, the content of the data object; and

    if the corresponding data object is present in the dictionary, the index code cross-referenced to the data object;

    where the composed message further includes one or more flags distinguishing between index codes and non-dictionary data objects in the message;

    the sending device transmitting the composed message to the receiving device; and

    the receiving device receiving the transmitted message, and in response the receiving device performing operations to process the the message comprising;

    reviewing the flags in the received message to identify subparts of the message as index codes or non-dictionary data objects;

    for each subpart identified as an index code, cross-referencing the index code in the dictionary contained in the receiving device'"'"'s store to obtain the cross-referenced data object, andfor each obtained data object that is a binary graphics file, operating the receiving device'"'"'s processor to display an image represented by said binary graphics file;

    for each obtained data object that is a binary executable program, operating the receiving device'"'"'s processor to execute said program; and

    for each subpart identified as a non-dictionary data object, providing an output of that data object.

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