Parallel Parsing Algorithms and VLSI Implementations for Syntactic Pattern Recognition
Earley's algorithm has been commonly used for the parsing of general context-free languages and the error-correcting parsing in syntactic pattern recognition. The time complexity for parsing is 0(n3). This paper presents a parallel Earley's recognition algorithm in terms of an ``X*'...
Veröffentlicht in: | IEEE transactions on pattern analysis and machine intelligence. - 1979. - 6(1984), 3 vom: 01. März, Seite 302-14 |
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Format: | Aufsatz |
Sprache: | English |
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1984
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Zugriff auf das übergeordnete Werk: | IEEE transactions on pattern analysis and machine intelligence |
Schlagworte: | Journal Article |
Zusammenfassung: | Earley's algorithm has been commonly used for the parsing of general context-free languages and the error-correcting parsing in syntactic pattern recognition. The time complexity for parsing is 0(n3). This paper presents a parallel Earley's recognition algorithm in terms of an ``X*'' operator. By restricting the input context-free grammar to be ¿-free, the parallel algorithm can be executed on a triangular-shape VLSI array. This array system has an efficient way of moving data to the right place at the right time. Simulation results show that this system can recognize a string with length n in 2n + 1 system time. We also present a parallel parse-extraction algorithm, a complete parsing algorithm, and an error-correcting recognition algorithm. The parallel complete parsing algorithm has been simulated on a processor array which is similar to the triangular VLSI array. For an input string of length n the processor array will give the correct right-parse at system time 2n + 1 if the string is accepted. The error-correcting recognition algorithm has also been simulated on a triangular VLSI array. This array recognizes an erroneous string of length n in time 2n + 1 and gives the correct error count. These parallel algorithms are especially useful for syntactic pattern recognition |
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Beschreibung: | Date Completed 02.10.2012 Date Revised 12.11.2019 published: Print Citation Status PubMed-not-MEDLINE |
ISSN: | 1939-3539 |