摘要:
An automatic sound controlling apparatus including an electric signal/sound converter (2) outputting a compensating sound to a canceling object space to cancel a sound from a sound producing source (1) and a sound/electric converter (3) for converting a residual sound of the sound canceling with a compensating signal from the electric/sound converter (2) into an electric signal. A first adaptive filtering means (4) controls the filter coefficients based on a signal from the sound/electric converter (3) to form a compensating signal to the electric/sound converter (2) for canceling a stationary sound. A transfer characteristics stimulating means (5) stimulates transfer characteristics of the electric/sound converter (2), the sound/electric converter (3) and the sound of the canceling object space. A difference signal calculating means (6) calculates a difference signal between outputs of the sound/electric converter (3) and the transfer characteristics stimulating means (5) to supply the first adaptive filtering means (4) with a difference signal. A signal producing means (7) produces a predetermined shape signal based on a timing signal with respect to a sound producing period of the sound producing source (1). A second adaptive filtering means (8) controls filter coefficients based on a signal from the sound/electric converter (3) to form a compensating signal to the electric/sound converter (2) for canceling a fluctuating sound. And adding means (9) adds an output signal of the first adaptive filtering means (4) and an output signal of the second adaptive filtering means (8) to output the adding signal to the electric/sound converter (2) and the transfer characteristics stimulating means (5).
摘要:
A vehicle drive assist system comprising a camera (10) for picking up an image of an area existing in an advancing direction of a vehicle; display means (4) for displaying the image picked up by the camera; steering angle detecting means (12) for detecting a steering angle for steering the vehicle; traveling bath predicting means (20) for predicting a traveling path of the vehicle on the basis of the steering angle detected by the steering angle detecting means; and drive assist means for overlaying on the display means drive assist information containing the vehicle predictive traveling path predicted by the traveling path predicting means and guide lines prolonged from the lines defining the width of the vehicle body on the image of the area existing in the vehicle advancing direction.
摘要:
A speech recognizing apparatus compares a speech command from a user with one of registration patterns stored in a storage unit in turn. Then if the speech command coincides with one of the registration patterns, that controls a predetermined electronic apparatus associated with an operation related to the registration pattern. If the speech command does not coincide with any one of the registration patterns, that stores into the first storage unit the speech command as a new registration pattern in which the speech command is related to a manipulation of the electronic apparatus by the user immediately after speech command is produced.
摘要:
A noise control device which comprises a speaker (3) arranged in the exit of a tail pipe (2) through which noises of the engine of an automobile are given off, the open end of which is at a given angle with respect to the plane vertical to the ground in the vicinity of the tail pipe (2) in order to silence the noises; an enclosure (21) tightly closing the rear part of the speakers (3 and 4); and a silencing sound guiding member (22) which guides the silencing sound released from the front end of the speaker (3) to the exit of the tail pipe (2). A bumper (23) which absorbs the shock at the time of collision is formed in a closed space. This closed space is used as the back cavities of the speakers (3 and 4). A plurality of microphones (5-1, 5-2, and 5-3) are arranged at given distances from the speakers (3 and 4). Their outputs are synthesized on the basis of the degrees of contributions to deaden noises.
摘要:
In a noise controller which forms a noise cancelling sound having a phase opposite to and a sound pressure equal to those of a noise infiltrating into a closed space, any deviation in its transfer characteristics from the initial equalization is easily checked and judged owing to the provision of an adaptive filter 10 which automatically varies the filter coefficient and forms a cancelling signal for forming a cancelling sound, a coefficient updating means 11 which updates the filter coefficient based on an error signal after the noise has been cancelled, a second simulated transfer characteristics compensation means 13 which forms the initial equalization by simulating transfer characteristics of a transmission path via the space in which the noise is to be cancelled and forms a reproduced reference signal, a white noise generating means 15 which generates white noise to check the initial equalization, and an initial equalization judging means 18 which judges the accuracy of the initial equalization based on a ratio (S/N) of the reproduced reference signal obtained from white noise to the error signal. A change in the conditions for cancelling noise is detected in the closed space, and any deviation from the initial equalization is judged.
摘要:
A noise control device disposed at the outlet of a tail pipe which emits exhaust noise of an automobile to silence noise from the tail pipe comprises a speaker (3). Based on the amount of silencing noise which becomes greater as a plurality of microphones (5-1, 5-2, 5-3) are arranged to be closer to the speaker (3,4), the outputs of the plurality of microphones (5-1, 5-2, 5-3) apart a constant distance from said speaker (3) are synthesized.
摘要:
In a noise controller which forms a noise cancelling sound having a phase opposite to and a sound pressure equal to those of a noise infiltrating into a closed space, any deviation in its transfer characteristics from the initial equalization is easily checked and judged owing to the provision of an adaptive filter 10 which automatically varies the filter coefficient and forms a cancelling signal for forming a cancelling sound, a coefficient updating means 11 which updates the filter coefficient based on an error signal after the noise has been cancelled, a second simulated transfer characteristics compensation means 13 which forms the initial equalization by simulating transfer characteristics of a transmission path via the space in which the noise is to be cancelled and forms a reproduced reference signal, a white noise generating means 15 which generates white noise to check the initial equalization, and an initial equalization judging means 18 which judges the accuracy of the initial equalization based on a ratio (S/N) of the reproduced reference signal obtained from white noise to the error signal. A change in the conditions for cancelling noise is detected in the closed space, and any deviation from the initial equalization is judged.
摘要:
An automatic sound controlling apparatus including an electric signal/sound converter (2) outputting a compensating sound to a canceling object space to cancel a sound from a sound producing source (1) and a sound/electric converter (3) for converting a residual sound of the sound canceling with a compensating signal from the electric/sound converter (2) into an electric signal. A first adaptive filtering means (4) controls the filter coefficients based on a signal from the sound/electric converter (3) to form a compensating signal to the electric/sound converter (2) for canceling a stationary sound. A transfer characteristics stimulating means (5) stimulates transfer characteristics of the electric/sound converter (2), the sound/electric converter (3) and the sound of the canceling object space. A difference signal calculating means (6) calculates a difference signal between outputs of the sound/electric converter (3) and the transfer characteristics stimulating means (5) to supply the first adaptive filtering means (4) with a difference signal. A signal producing means (7) produces a predetermined shape signal based on a timing signal with respect to a sound producing period of the sound producing source (1). A second adaptive filtering means (8) controls filter coefficients based on a signal from the sound/electric converter (3) to form a compensating signal to the electric/sound converter (2) for canceling a fluctuating sound. And adding means (9) adds an output signal of the first adaptive filtering means (4) and an output signal of the second adaptive filtering means (8) to output the adding signal to the electric/sound converter (2) and the transfer characteristics stimulating means (5).
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.