MENU-DRIVEN VOICE (SPEECH) RECOGNITION AND OPERATION SYSTEM BASED ON BAR-CODE LIKE MULTIPLE LEVEL PATTERNS OF PRE-DEFINED SPEECH DATA

摘要

A system for recognizing and operating a menu-driven voice based on a barcode type multi-level digital pattern of predefined voice data is provided to reduce a memory space for maintaining voice data information by using an effective vector arrangement management. A circle(10), a front interface of a voice input signal, matches a noise reference input to its maximum level and transfers a signal to a block(20) selectively filtered to extract noise or an interference from a primary input(signal plus noise). The block removes an audio feedback generated due to coupling between a speaker and a microphone. An in-band filter(30) transfers a valid input voice signal of a limited range of attenuating a signal from a voice frequency. A waveform converter and pulse generator(40) converts a minus signal of a sine wave input into a plus signal and processes a uni-polar signal with respect to a plus side. A level normalizer(50) receives a basic input digital code having a multi-level code pattern from the waveform converter and pulse generator, and determines whether an input signal is valid at its end until time of a timer is terminated. A time window normalizer(60) receives a time length of a normalization input code having a multi-level code pattern and normalizes it with an input code level. A pattern generator(70) restores a code pattern generated from an input code to an arrangement of a fixed size. A pattern DB(80) maintains a previously generated reference command code pattern. A pattern comparator(90) maintains a counter allocated to each reference command and compares the reference command code pattern and an input command code pattern. When the pattern comparator obtains a reference command pattern, a code confirmer(100) checks whether the corresponding command/data is accurate. When the corresponding command/data is accurate, a CMD Out(110) transmits the command to a target unit.