Message Storage and Transmission Using Mixed Alphanumeric and Word Codes
Original Publication Date: 1983-Sep-01
Included in the Prior Art Database: 2005-Feb-07
This compression algorithm utilizes unique codes for each of a large number of words comprising a vocabulary. Also provided is a default procedure whereby standard EBCDIC codes can be used for short words not justifying the special encoding, as well as for words not in specially coded vocabulary. The switching between the special code and EBCDIC code groups of bytes is signalled by two-byte codes which indicate spaces and also characterize the significance of the bytes which follow. The following table gives an example of such space code designations: Code* 'B0' - EBCDIC code follows until next 'Bx' code. 'B1' - Special 3-byte code for word follows. Lower case. 'B2' - Special 3-byte code for word follows. Upper case all letters. 'B3' - Special 3-byte code for word follows.