METHOD AND APPARATUS FOR EXTRACTING INFORMATION-BEARING PORTIONS OF A SIGNAL FOR RECOGNIZING VARYING INSTANCES OF SIMILAR PATTERNS

A method and apparatus for extracting information-bearing portions of an input signal from which is calculated a sliding average magnitude difference function (SAMDF). The signal is coupled to three separate data channels. Each channel is logarithmically spaced from the adjacent channel and time and...

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Bibliographische Detailangaben
Hauptverfasser:	LIN, LISAN S, SMITH, LLOYD A, BALENTINE, BRUCE E, SCOTT, BRIAN L, NEWELL, JOHN M
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ACOUSTICS ANALOGOUS ARRANGEMENTS USING OTHER WAVES DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING MUSICAL INSTRUMENTS PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION SPEECH ANALYSIS OR SYNTHESIS SPEECH OR AUDIO CODING OR DECODING SPEECH OR VOICE PROCESSING SPEECH RECOGNITION TESTING
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Beschreibung
Zusammenfassung:	A method and apparatus for extracting information-bearing portions of an input signal from which is calculated a sliding average magnitude difference function (SAMDF). The signal is coupled to three separate data channels. Each channel is logarithmically spaced from the adjacent channel and time and amplitude normalized to generate a data template containing the information-bearing portions of the signal. In addition, a fourth channel is derived from the first three. Sixteen data measurements are taken, four from each of the four channels with three additional data measurements being derived from the energy envelope of the information-bearing portion of the input signal. The 19 total data measurements represent the amplitude normalized envelope of the signal. 7301f