Spracherkennungseinrichtung für ein Fahrzeug mit einer Mikrophonanordnung zur Lokalisierung des Sitzes, von welchem ein Befehl kommt.

摘要

This invention relates to a speech recognition apparatus used in a vehicle. The speech recognition apparatus includes microphones (1), and a speech recognition means (3) for recognising a voice command from the microphones. An in-phase component detecting means (4) detects an in-phase component of voice signals from the microphones (1) positioned symmetrically with respect to a driving seat, to obtain a command generated at the driving seat. A phase shift and in-phase component detecting means (5) detects an in-phase component after shifting a certain amount of a voice signal phase from the microphones positioned asymmetrically with respect to passenger seats, to thereby obtain the same phase shifts and a command generated at the passenger seats. A command seat discriminating means (6) compares an output level of the in-phase component detecting means (4) and the phase shift and in-phase component detecting means (5) to discriminate at which seat a command is generated among several seats. A detecting means (7) detects a validity and invalidity of commands resulting from speech obtained from outputs of the speech recognition means and command seat discriminating means to thereby control various equipment.