摘要:
A vehicle-carried sound reproduction system which reproduces a sound image forwardly of a passenger of a vehicle in which it is incorporated. The vehicle-carried sound reproduction apparatus includes a correction filter circuit for converting input digital audio signals XL(Z) and XR(Z) for left and right channels into digital audio signals YL(Z) and YR(Z) represented respectively by YL ( Z ) · GLL ( Z ) + YR ( Z ) · GLR ( Z ) = XL ( Z ) · FLL ( Z ) + XR ( Z ) · FLR ( Z ) YR ( Z ) · GLL ( Z ) + YL ( Z ) · GLR ( Z ) = XR ( Z ) · FLL ( Z ) + XL ( Z ) · FLR ( Z ) where FLL(Z), FLR(Z), GLL(Z), and GLR(Z) represent head transfer functions. The vehicle-carried sound reproduction system further includes a digital to analog converter circuit for converting the digital audio signals YL(Z) and YR(Z) outputted from the correction filter circuit into analog audio signals. The analog audio signals outputted from the digital to analog converter circuit are supplied to a pair of speakers for the left and right channels.
摘要:
An automotive audio reproducing apparatus according to the present invention comprises: a sound image position correction circuit 52 for converting a left-channel input digital audio signal XL(Z) and a right-channel input digital audio signal XR(Z) into a digital audio signal YL(Z) and a digital audio signal YR(Z), respectively, for output expressed by: YL(Z)·GLL(Z)+YR(Z)·GLR(Z)=XL(Z)·FLL(Z)+XR(Z)·FLR(Z) YR(Z)·GLL(Z)+YL(Z)·GLR(Z)=XR(Z)·FLL(Z)+XL(Z)·FLR(Z) where FLL(Z) to GLR(Z) are given head related transfer functions; a depth correction circuit 53 for adding reflected sound signals to the signals YL(Z) and YR(Z), respectively; a D/A converter circuit 6 for subjecting output signals of the correction circuit 53 to D/A conversion; and a level control circuit 522 for controlling level of a difference signal in the sound image position correction circuit 52; whereby analog audio signals outputted from the D/A converter circuit 6 are supplied to a left-channel speaker and a right-channel speaker, respectively.
摘要:
An acoustic apparatus comprises an attenuator for attenuating a first audio signal to produce a second audio signal, a low pass filter for reducing high frequency components of the second audio signal to produce a third audio signal, a differential amplifier operative to produce a fourth audio signal corresponding to a difference between the first and third audio signals, and a speaker supplied with the fourth audio signal obtained from the differential amplifier, wherein a cutoff frequency of the low pass filter is selected to be not lower than 2 kHz and not higher than 6 kHz and attenuation of the first audio signal in the attenuator is so selected that a listener is able to recognize a virtual sound source position in front of and at a level higher than an actual position of the speaker.
摘要:
An apparatus discriminates a color format. The signal processing paths separate a luminance signal and a color signal from a broadcasting signal based on a plurality of color formats. The direct signal path provides a direct output of the broadcasting signal without separating the luminance signal and the color signal therefrom. The relay device selectively relays the broadcasting signal as input to any one of the respective signal processing paths and the direct signal path. The detection device detects color format variation of the broadcasting signal based on an output signal from the signal processing paths. The discrimination device discriminates the color format of the broadcasting signal based on the broadcasting signal as input through the direct signal path. The control device controls the relay device to relay the broadcasting signal to the direct signal path when color format variation is detected by the detection device.
摘要:
A display panel drive method performs image display at a good brightness level regardless the pattern of the image while decreasing power consumption. In this drive method, the number of emission of pixel cells assigned to each subfield is changed based on the peak brightness level of the input video signal.
摘要:
A display device displays an image according to an input image signal on a display panel. The display device includes a plurality of display cells for creating the image from pixel signals with different emission colors according to the signal levels thereof. The display cells are arrayed in a matrix. The display device includes a brightness level calculation circuit for calculating emission brightness of the displayed image, and generating a brightness level signal that indicates the level of the emission brightness. The display device also includes an emission level correction circuit for correcting the signal levels of pixel signals included in the image signal for respective emission colors according to the brightness level signal.
摘要:
A door assembling apparatus for use in automobile assembly having a door transport unit for conveying a door and for maintaining a hinge member of a vehicle body and a corresponding hinge member of a door loosely engaged with each other, a hinge-pin attaching unit for inserting a gib-headed hinge pin through the engaged hinge members, and a stopper for receiving a leading end of the hinge pin as being projected from and through the engaged hinge members. The leading end of the hinge pin increases in diameter through plastic deformation thereof by the contact with the stopper, and this increased diameter effectively prevents disengagement of the pin from the hinge members. With these features, the anti-disengagement operation can be effected very efficiently and conveniently through the plastic deformation of the leading end of the pin which is realized by effectively utilizing the original function of the hinge-pin attaching means, i.e. the function for causing the hinge pin to enter the hinge members. Thus, construction can be formed very simply and economically without requiring special parts.
摘要:
A video signal processing circuit in which nearly 100% of a largest possible dynamic range can be used, desired contrast is obtained, and desired brightness characteristics are obtained by an increasing in luminance of a screen. The circuit has an RGB amplifier which amplifies three primary color video signals R, G, and B by a predetermined gain and in which the gain is controlled by a gain control signal, A/D converters for converting analog three primary color video signals which are generated from the RGB amplifier into digital signals respectively, inverse gamma correcting circuits for effecting an inverse gamma correction to the three primary color digital video signals respectively, an OR circuit and a peak holding circuit for detecting peak levels of the analog three primary color signals, and a gain control signal generator for generating a gain control signal in accordance with the peak levels. When the peak levels are equal to or larger than a predetermined value, the gain control signal generator supplies the gain control signal to control the RGB amplifier so as to set the level of each of the three primary color digital video signals generated by the A/D converters at a peak value.
摘要:
An automobile assembling apparatus is provided to provisionally assemble a set of front and rear drive system assemblies, each having at least a suspension system with a damper unit dangling thereon, to a vehicle body prior to rigidly securing, and thereby setting up, the front and rear drive system assemblies and vehicle body into one unit with fasteners in an automobile assembling line and comprises a carrier pallet for carrying the set of front and rear drive system assemblies placed thereon in position, a conveyor for conveying the front and rear drive system assemblies on the carrier pallet to a provisional assembling station wherre front and rear drive system assemblies are provisionally assembled to vehicle bodies, an overhead conveyor for conveying the vehicle body above the provisional assembling station and lowering it on the front and rear drive system assemblies to provisionally assemble the front and rear drive system assemblies to the vehicle body, and a holding device installed at the provisional assembling station for releasably holding the suspension damper unit of at least one of said front and rear drive system assemblies still in a setting position relative to the vehicle body.
摘要:
An apparatus for assembling a wheel attaching unit for use in a vehicle assembly line having a pallet capable of mounting at predetermined positions thereof a front assembly including a front wheel attaching unit and a rear assembly including a rear wheel attaching unit; a pallet conveyor for conveying the pallet through a setting area and a securing area of the front and rear units and a body; and a body conveyor for conveying the body to a position above the setting area and for lowering the body to set the front and rear assemblies to the body. The pallet includes a holding portion for the front assembly and/or a holding portion for the rear assembly with the holding portion being position adjustable in forward and rearward directions thereof.