Data processing and storage system using filtering and sampling techniques

Claim 1

An information signal processing system for use with a pattern recognition system which has means (1) for converting an information signal of an object to be recognized into an electrical signal (S O ), means (7) for receiving the electrical signal from said converting means and producing horizontal and vertical synchronizing signals from the electrical signal and producing a sampling signal (S P ), means (4) for sampling said electrical signal from said converting means controlled by said sampling signal and means (9) for sequentially comparing output signals from said sampling means with reference signals, said information signal processing system being characterized in that said sampling signal producing means comprises means (8) receiving the vertical synchronizing. signal (S V ) and producing a plurality of sampling signals (S P ) in one period between adjacent vertical synchronizing signals, and filtering means (3) provided which receives the electrical signal (S O ) from said converting means and produces an envelope signal (S A ) which is approximately equal to said electrical signal (S O ) from said converting means and supplies its output to said means (4) for sampling, the filtering characteristic of said filtering means (3) being selected so as to smooth said electrical signal (S A ) from said converting means during at least more than one horizontal scanning period, said signal (S A ) from said filtering means being supplied to said sampling means, and said sampling signals (S p ) from said sampling signal producing means (8) being also supplied to said sampling means to determine its sampling time within one period.