Pattern recognition apparatus and pattern learning apparatus employing neural net including excitatory element-inhibitory element pair couplings
First Claim
1. A pattern recognition apparatus for recognizing an applied input pattern, said input pattern including a plurality of input signals for defining said input pattern, said apparatus comprising:
- a neural net including a plurality of excitatory element-inhibitory element pairs which are mutually coupled with each other in accordance with a predetermined relation,each said element pair having a corresponding excitatory element and a corresponding inhibitory element coupled in opposite directions through a first pair coupling coefficient for the excitatory coupling and a second pair coupling coefficient for the inhibitory coupling, respectively,said plurality of excitatory elements each receiving said plurality of input signals,any two of said plurality of excitatory elements being coupled in opposite directions through excitatory element coupling coefficients;
teacher signal generating means for generating a teacher signal in accordance with a learning pattern to be learned;
coupling coefficient updating means responsive to a teacher signal for updating said first and second pair coupling coefficients and said excitatory element coupling coefficients in said neural net,after updating by said coupling coefficient updating means, said neural net receiving said plurality of input signals and outputting an activation signal through said plurality of excitatory elements; and
classification determining means responsive to said activation signal for determining classification of said input pattern.
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Abstract
Disclosed in a pattern recognition apparatus including a neural net including a plurality of mutually coupled excitatory element-inhibitory element paris. The elements in the neural net are coupled through pair coupling coefficients and an excitatory element coupling coefficient. A teacher signal generator outputs a successive teacher signal Q (t) and its infinitesimal variation ΔQ (t) in accordance with a learning pattern, to apply the output teacher signal and the output small variation to a coupling coefficient controller. The coupling coefficient controller carries out a learning processing in accordance with the teacher signal, so that the coupling coefficients in the neural net are updated. An operation time necessary for a pattern recognition is shortened. In addition, since the learning processing is carried out by only a forward processing on time base, a learning time is also decrease.
31 Citations
14 Claims
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1. A pattern recognition apparatus for recognizing an applied input pattern, said input pattern including a plurality of input signals for defining said input pattern, said apparatus comprising:
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a neural net including a plurality of excitatory element-inhibitory element pairs which are mutually coupled with each other in accordance with a predetermined relation, each said element pair having a corresponding excitatory element and a corresponding inhibitory element coupled in opposite directions through a first pair coupling coefficient for the excitatory coupling and a second pair coupling coefficient for the inhibitory coupling, respectively, said plurality of excitatory elements each receiving said plurality of input signals, any two of said plurality of excitatory elements being coupled in opposite directions through excitatory element coupling coefficients; teacher signal generating means for generating a teacher signal in accordance with a learning pattern to be learned; coupling coefficient updating means responsive to a teacher signal for updating said first and second pair coupling coefficients and said excitatory element coupling coefficients in said neural net, after updating by said coupling coefficient updating means, said neural net receiving said plurality of input signals and outputting an activation signal through said plurality of excitatory elements; and classification determining means responsive to said activation signal for determining classification of said input pattern. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13)
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12. A pattern learning apparatus, comprising:
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a neural net including a plurality of excitatory element-inhibitory element pairs which are mutually coupled with each other in accordance with a predetermined relation, each said element pair having corresponding one of said excitatory elements and corresponding one of said inhibitory elements coupled with each other in opposite directions through first and second pair coupling coefficients, any two of said plurality of excitatory elements being coupled in opposite directions through an excitatory element coupling coefficient; teacher signal generating means for generating a teacher signal in accordance with a learning pattern to be learned; and sequential-time learning processing means for updating said second pair coupling coefficient and said excitatory element coupling coefficient in said neural net by carrying out only a forward processing on a time base with respect to the teacher signal.
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14. A pattern recognition apparatus for recognizing an applied input pattern, said input pattern including a plurality of input signals for defining said input pattern, said apparatus comprising:
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a neural net including a plurality of excitatory element-inhibitory elements pairs which are mutually coupled through with each other in accordance with a predetermined relation, each of said element pair having a corresponding excitatory element and a corresponding inhibitory element coupled in opposite directions through a first pair coupling coefficient for the excitatory coupling and a second pair coupling coefficient for the inhibitory coupling, respectively, said plurality of excitatory elements each receiving said plurality of input signals, any two of said plurality of excitatory elements being coupled in opposite directions through excitatory element coupling coefficients; said neural net receiving said plurality of input signals and outputting an activation signal through said plurality of excitatory elements; and classification determining means responsive to said activation signal for determining classification of said input pattern.
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Specification