Data recognition apparatus includes a temporary storage to hold three data bits, a readable storage to store eight different sequences which are expected to occur, and a comparison means to find the closest match of the contents of the temporary storage with the readable storage at each bit time. Error detection and error correction are realized as each bit is recognized three times sequentially. The apparatus may use surface acoustic wave and charge coupled device filter banks, and analog to di...

Video informatin obtained in real time is clocked and digitized according to light intensity. Changing light intensities are adaptively determined to vary the threshold level for determining black and white signals. The scene to be used as a reference is first recorded in a fine format and then in a coarse format. In the search mode the coarse stored information is compared in real time with coarse information from the field of view and convolved to generate a correlation number indicating the p...

A speech recognition method for detecting and recognizing one or more keywords in a continuous audio signal is disclosed. Each keyword is represented by a keyword template representing a plurality of target patterns, and each target pattern comprises statistics of each of a plurality of spectra selected from plural short-term spectra generated according to a predetermined system for processing of the incoming audio. The spectra are processed to enhance the separation between the spectral pattern...

A system and method for speech recognition provides a means of printing phonemes in response to received speech signals utilizing inexpensive components. The speech signals are inputted into an amplifier which provides negative feedback to normalize the amplitude of the speech signals. The normalized speech signals are delta modulated at a first sampling rate to produce a corresponding first sequence of digital pulses. The negative feedback signal of the amplifier is delta modulated at a second ...

An input signal recognition circuit for a control system having an array of momentary switching elements (hereinafter referred to as "keys") whose number is larger than that of the array input terminals, which prevents erroneous control system operation which may occur upon simultaneous actuation of a plurality of keys. The control system with the input signal recognition circuit stably operates against key chattering and noise. The input signal recognition circuit comprises a keyboard including...

Recognition apparatus is disclosed for recognizing multiple valued documents and for providing signals indicative of the value of each such document where the number of such signals is provided in a ratio of the value of the document to a base value.

An optical character recognition device including means to define a scanning area which includes portions of a printed character to be scanned by a television camera, said camera scanning discrete points of said area arranged in spaced vertical paths, and including means to measure the optical density of the character portion encountered at each point and to assign a binary-coded numerical value to each point and to store each of said numerical values in a matrix-like fashion corresponding to th...

An apparatus for separating the signals of an internal shape from the signals of an external shape for use in a shape recognition system.

In the speech recognition apparatus disclosed herein, an audio signal is digitized and a succession of short-term power spectra are generated over a time interval corresponding to a spoken word. The short-term power spectra are frequency band equalized as a function of the peak amplitude occurring in each frequency band over the word interval. The changes in amplitude in each frequency band subjective time and then a limited number of frequency band equalized spectra are selected as representing...

In order to recognize confusable characters exactly, a pattern recognition system is described wherein, when more than two reference patterns having a similarity to the input unknown pattern larger than a predetermined threshold level are detected by a first discriminating circuit, one or more suitable feature comparators are selected from a plurality of feature comparators by the control signals corresponding to the reference patterns or the category thereof detected by the first discriminating...