Pattern associative memory system
First Claim
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1. A pattern associative memory method for associating and storing patterns comprising the steps of:
- inputting a set of pattern signals to be learned to a group of input elements of an error correcting circuit having one group of input elements for inputting information signals, one group of output elements including the same number of elements as the number of said input elements and each having predetermined signal level conversion characteristics and a plurality of wirings arranged in the form of a neural network and for connecting said one group of input elements to said one group of output elements;
storing a pattern shown by the inputted pattern signals in said error correcting circuit while variably setting each transfer efficiency of said plurality of wirings, by using a backpropagation method so that the inputted pattern signals and a set of output signals outputted from said group of output elements have substantially the same level;
inputting at least one set of pattern signals as the basis of a recollection of said group of input elements under a condition having the same transfer efficiency as the set transfer efficiency when the recollection is performed;
feedback-inputting said set of output signals outputted from said group of output elements to said group of input elements; and
outputting a set of the outputted signals in a converged condition as a result of recollection of said set of pattern signals as the basis of the recollection.
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Abstract
In a pattern associative memory system, an error correcting circuit is constructed in the form of a neural network. A memory condition of the error correcting circuit is established according to a back propagation method. If a memory pattern is recollected, an output from the error correcting circuit is again inputted to the error correcting circuit for feedback, thereby repeatedly performing error correction calculations of a pattern as the basis of recollection.
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Citations
8 Claims
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1. A pattern associative memory method for associating and storing patterns comprising the steps of:
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inputting a set of pattern signals to be learned to a group of input elements of an error correcting circuit having one group of input elements for inputting information signals, one group of output elements including the same number of elements as the number of said input elements and each having predetermined signal level conversion characteristics and a plurality of wirings arranged in the form of a neural network and for connecting said one group of input elements to said one group of output elements; storing a pattern shown by the inputted pattern signals in said error correcting circuit while variably setting each transfer efficiency of said plurality of wirings, by using a backpropagation method so that the inputted pattern signals and a set of output signals outputted from said group of output elements have substantially the same level; inputting at least one set of pattern signals as the basis of a recollection of said group of input elements under a condition having the same transfer efficiency as the set transfer efficiency when the recollection is performed; feedback-inputting said set of output signals outputted from said group of output elements to said group of input elements; and outputting a set of the outputted signals in a converged condition as a result of recollection of said set of pattern signals as the basis of the recollection. - View Dependent Claims (2)
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3. A pattern associative memory system comprising:
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means for correcting errors, said means having a group of input elements for inputting a set of pattern signals as the basis of recollection, a group of output elements having the same number of elements as the number of said group of the input elements and each having predetermined signal level conversion characteristics and a plurality of wirings arranged in the form of a neural network and for connecting said group of input elements to said group of output elements wherein at least one set of pattern signals used as the results of recollection is stored in advance in accordance with a value of transfer efficiency of said plurality of wirings and a level of said at least one set of pattern signals as the basis of the recollection is made close to a level of a pattern signal which is most similar among said at least one set of pattern signals; and feedback signal lines for feedback-inputting said set of output signals outputted from said group of the output elements in said means for correcting errors to said group of input elements. - View Dependent Claims (4, 5, 6, 7, 8)
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Specification