A hetero-associative memory using phase-coding technology

Mei Li Hsieh, Shiuan-Huei Lin, Ken-Yuh Hsu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The most impressive abilities of associative memory are its capability of fault tolerance and associated retrieval. In an ordinary memory of a conventional computer, every piece of the stored information has a specific address. One must know the complete address to retrieve particular information. By contrast, in an associative memory one needs to know only partial information relative to the contents for accomplishing a complete recall. In a hetero-associative memory, by inputing a partial pattern of one category, an associated pattern of another category can be obtained. It is well known that this can be achieved by an optical holographical method, in which two associated patterns are utilized to the record interconnection weights at the Fourier plane. However, due to the grating degeneracy, the number of the associated pairs is limited because of the serious cross-talk between different pairs. In the paper, we present our studies on the properties of a hetero-associative memory of multiple-pairs. We use a phase modulated liquid crystal television (LCTV) as the reference pattern to record holographic memories and we propose a novel technique applied to generate phase only interconnection weights. The results show that the cross-talk between different pairs of memories can be significantly reduced by the phase only filter technique.

Original languageEnglish
Title of host publicationCLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1183-1184
Number of pages2
ISBN (Electronic)0780356616, 9780780356610
DOIs
StatePublished - 1 Jan 1999
Event1999 Pacific Rim Conference on Lasers and Electro-Optics, CLEO/Pacific Rim 1999 - Seoul, Korea, Republic of
Duration: 30 Aug 19993 Sep 1999

Publication series

NameCLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics
Volume4

Conference

Conference1999 Pacific Rim Conference on Lasers and Electro-Optics, CLEO/Pacific Rim 1999
CountryKorea, Republic of
CitySeoul
Period30/08/993/09/99

Fingerprint Dive into the research topics of 'A hetero-associative memory using phase-coding technology'. Together they form a unique fingerprint.

  • Cite this

    Hsieh, M. L., Lin, S-H., & Hsu, K-Y. (1999). A hetero-associative memory using phase-coding technology. In CLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics (pp. 1183-1184). [814725] (CLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics; Vol. 4). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/CLEOPR.1999.814725