System which extracts feature from fuzzy information and semiconductor integrated circuit device having the system

A feature extraction system comprising:

• a sensor which receives fuzzy information inputs and converts the fuzzy information inputs into a plurality of measurable input physical quantities,
• a converter which receives the input physical quantities and converts the input physical quantities into pulses having pulse widths corresponding to magnitudes of the input physical quantities, and
• a feature extraction circuit which receives the pulses which are divided into plural groups, selects the plural groups of pulses by using a set pulse width as a reference, and extracts feature information expressing features of the fuzzy information inputs from the fuzzy information inputs according to the number of selected pulses.

A semiconductor integrated circuit device comprising:

• a converter circuit which receives fuzzy information inputs containing a plurality of measurable components and converts the plurality of components into a plurality of pulses having pulse widths corresponding to the magnitudes thereof, and
• a feature extraction circuit which receives the plurality of pulses, selects the plurality of pulses by using a set pulse width as a reference, and extracts feature information expressing features of the fuzzy information inputs from the fuzzy information inputs according to the number of selected pulses.

A semiconductor integrated circuit device comprising:

• a converter circuit which receives fuzzy information inputs containing measurable components and converts the components into pulses having pulse widths corresponding to the magnitudes thereof, and
• a feature extraction circuit which receives the pulses which are divided into plural groups, selects the plural groups of pulses by using a set pulse width as a reference, and extracts feature information expressing features of the fuzzy information inputs from the fuzzy information inputs according to the number of selected pulses.

A semiconductor integrated circuit device comprising:

• a plurality of pulse-width reduction circuits which receive the same input and on which different pulse-width reduction rates are set,
• a plurality of presence-of-pulse determination circuits which respectively receive outputs of said plurality of pulse-width reduction circuits and determine whether pulses exist or not, and
• a signal selection circuit which selects one of said plurality of presence-of-pulse determination circuits which is to be used and determines whether the input is a signal or noise based on the pulse existence judgment of the selected one of said presence-of-pulse determination circuits.

A semiconductor integrated circuit device comprising:

• a plurality of pulse-width reduction circuits which receive the same input and on which different pulse-width reduction rates are set,
• a plurality of presence-of-pulse determination circuits which respectively receive outputs of said plurality of pulse-width reduction circuits and determine whether pulses exist or not, and
• a majority decision circuit which receives outputs of said plurality of presence-of-pulse determination circuits, makes a majority decision to determine whether the presence or absence of the pulses has a majority, and determines whether the input is regarded as a signal or noise based on the result of the majority decision.