Communications: electrical – Digital comparator systems
Patent
1975-07-16
1976-11-30
Thesz, Joseph M.
Communications: electrical
Digital comparator systems
G06K 900
Patent
active
039952541
ABSTRACT:
A digital reference matrix apparatus is disclosed for verifying input alpha words from a keyboard, character recognition machine, or voice analyzer as valid linguistic expressions. The organization of the digital reference matrix is based upon the character transfer function of the input apparatus. The digital reference matrix contains a vector representation for each dictionary word in the form of a calculated vector magnitude and unique vector angle. The set of magnitudes and angles is stored in the digital reference matrix using a form of run length coding by storing a single magnitude pointer followed by the chain of unique angles for words having the same magnitude. The vector magnitude so calculated constitutes the address data for accessing the digital reference matrix. When an input word is received for verification, the word's magnitude and angle attributes are calculated and the digital reference matrix is accessed at the magnitude of the input word and the corresponding angles are searched for a match. An output signal is generated indicating whether or not the input word is valid. The organization of the digital reference matrix minimizes the size of the array needed for accurate word verification representation through the use of the combination of digital angle representation and run length compaction of the magnitude/angle verification syntax.
REFERENCES:
giangardella et al.; Spelling Correction by Vector Representation Using a Digital Computer, Dec. 1967; IEEE Transactions on Engineering Writing & Speech, vol. EWS-10, No. 2, pp. 57-62.
Henderson, Jr. John W.
International Business Machines - Corporation
Thesz Joseph M.
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