JP2587962B2 - Pattern judgment device - Google Patents

Description

Description: TECHNICAL FIELD [0001] The present invention relates to a pattern determination device, and more particularly to a pattern determination device effective for associative pattern determination.

[Background of the invention and its problems]

Conventionally, in character recognition and voice recognition, pattern matching is generally performed in which a pattern of an input signal or a signal pattern obtained by applying some processing to the input signal is compared with a registered pattern. Unless the degree of coincidence is high, accurate judgment was impossible.

On the other hand, as a method for performing associative pattern determination, a brain cell model based on a nerve cell model as shown in FIG. 1 has been proposed. The neuron model shown in Fig. 1 was created in 1943 by the Massachusetts Institute of Technology, WSMcCa
Published by lloch and WHPitts, and demonstrated by F. Rosenblatt that associative pattern matching is possible with brain cell models.

However, if a brain cell model is to be realized by an integrated circuit, a huge number of output pins are required to output an associative pattern, and it is impossible to implement a circuit having practical capabilities with current semiconductor technology. It is possible.

For example when entering a single character as a binary pattern of 32 × 32 dots, in order to process it as completely orthogonal data are required (32 ²⁾ 2 ^{= 106} neurons,
In order to output the firing state of all these neurons, 10 ⁶
Requires three output pins.

On the other hand, attempts have been made to realize a brain cell model by software, but it consumes a huge amount of memory and its processing speed is not sufficient.

[Object of the invention]

The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide a pattern judging device which enables integration of a so-called brain cell model into an integrated circuit.

[Summary of the Invention]

The pattern determination apparatus according to the present invention provides an element having a function of a nerve cell to have a property of optically changing according to an output state, for example, providing a window for detecting the change in an IC package, and providing the window from outside. The ignition pattern is detected by the detector through the detector.

(Example of the invention)

Next, an embodiment of a pattern determining apparatus according to the present invention will be described with reference to the drawings.

Here, the nerve cell model of FIG. 1 will be described. Weights (efficiencies) w _{1 to} w _k are set for inputs x _{1 to} x _k , and a value x ₁ w obtained by multiplying each input by a weight is set. _{when 1 + x 2 w 2 + ...} x k w k exceeds the threshold value H, so that the output z occurs. The weights w ₁ to w _k is changed by the teacher signal y, the weight is increased corresponding to the input at that time (the portion of the x ₁ ~x _k or all) when the output to the input were adequate On the other hand, when it is inappropriate, it is decreased.

FIG. 2 shows an integrated circuit in which a plurality of elements E functionally equivalent to the model of FIG. 1 are interconnected. The input of each element E is connected to the output of all other elements E. I have. Here, depending on the connection capacitance of each element, a configuration in which another element is connected to each element may be adopted. In the circuit of FIG. 2, elements E arranged at one end are used for input (for example, elements arranged horizontally at the upper end of FIG. 2), and an input signal is given to these elements E. At least a part of each element is formed of a light emitting semiconductor such as GaAs, and the element emits light in a state where an output is generated, that is, in a so-called ignition state.

The circuit shown in FIG. 2 is housed in a package P as shown in FIG. 3, and the package P is provided with a window W made of a transparent material. The size and position of the window W are set so that all the elements can be seen from the outside, and the light emitting state of each element can be detected from the outside. That is, the ignition state of the circuit shown in FIG. 2 does not need to be electrically led out of the package, and processing of an enormous number of wires or output pins is unnecessary.
Detection of the state inside the package can be done by using an image pickup tube or CC including an optical system.
The detection is performed by a detector having a light receiving function such as D. For example, a configuration as shown in FIG. 4 is employed.

In FIG. 4, a detector 1 is arranged to face a window W of a package P, and an output of the detector 1 is input to a comparator 2. After temporarily holding the output of the detector 1, the comparator 2
The pattern is compared with the pattern registered in the register 3. For example, firing patterns corresponding to all character patterns are registered in the register 3, and the comparator 2 sequentially calls the registered patterns and compares them with the firing pattern at that time. The comparison result is output to the output device 4 as, for example, the number of the registered pattern that matches the most, and the output device displays the output result on the CRT 5 or the like.

An input device 6 is connected to the circuit of FIG. 2 via pins provided on the package P, and an input pattern and a teacher signal are given from the input device.

〔The invention's effect〕

As described above, the pattern determination device according to the present invention includes:
A device that has the function of a nerve cell is given a property that changes optically depending on the output state.For example, a window for detecting this change is provided on the IC package, and the firing pattern is detected by a detector through this window from outside. Therefore, there is an excellent effect that an integrated circuit of a so-called brain cell model can be realized.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing a nerve cell model, FIG. 2 is a conceptual diagram showing a circuit connecting the nerve cell models to each other, FIG. 3 is an external view of an integrated circuit having the circuit of FIG. 2, and FIG. FIG. 3 is a block diagram showing an embodiment of a pattern discriminating apparatus. E: element, P: package, w: window. 1 Detector, 2 Comparator, 3 Register, 4
Output device, 5 CRT, 6 Input device.

Claims (1)

(57) [Claims] A plurality of elements each generating an output when a sum of a plurality of inputs each having an efficiency set exceeds a threshold value;
The elements are connected so that the output of at least some of the elements becomes the input of other elements, and the elements change optically when the elements generate outputs, and a detector for detecting this optical change is provided. The provided pattern determination device.