Abstract: A signal processing circuit includes a delaying unit that is configured to carry out delay processing on the basis of periodicity information synchronized with the periodicity of a periodic noise included in an input signal and a filter unit that is configured to receive the input signal and has a notch characteristic at a frequency f. The frequency f satisfies f=N/T, where N represents an integer equal to or greater than one and T represents a delaying time applied by the delaying unit.

Abstract: An adaptive noise reduction method and apparatus capable of reducing efficiently variable period noise from a main input is provided. A variable period pulse signal and a sampling clock are supplied to a counter 32 within an adaptive signal processor 30, where an input period is counted by the sampling clock and the counted value is supplied to a timing generator 34. From the timing pulse, a variable read-address generator 33 generates in turn Xv addresses 0 to M and a write-address generator 35 generates in turn Xk?1 addresses 0 to M, respectively, and the results are input to an accumulator 36 as the read address and write address. A product 2?Ek of an error signal Ek multiplied by a step gain ? and data Wk read from the address Xk are input to an adder 38, whose output signal is delayed by a unit sample time 37 and is written into Xk?1 address. An adaptive coefficient Wv is read from Xv address and input to a (?) terminal of an adder 9 through a data interpolation means 39.

Abstract: The present invention provides a sound generating method of generating sound signals related to a video signal, which comprises a step of generating independently each of the sound signals matched to a horizontal direction and a vertical direction of a video, and a step of allowing the horizontal and the vertical sound signals that have been generated to be reproduced independently with horizontal sound output means and vertical sound output means, respectively.

Abstract: An object is to provide an automatic wind noise reducing circuit and an automatic wind noise reducing method, which are capable of coping with a multichanneling trend of audio signals, and improving performance as well as the degree of freedom in system design. Arithmetic units (26, 27, 28) obtain added signals of audio signals of audio channels excluding respective selected audio channels, which are selected so as to be different from each other. Arithmetic units (29, 30, 31) subtract respective added signals of the arithmetic units (26, 27, 28) from corresponding audio signals of the selected audio channels. The subtraction signals from the arithmetic units (29, 30, 31) are subjected to a band limit control and limited to a frequency band of a wind noise signal by LPFs (21, 23, 25).

Abstract: An apparatus for reducing noise includes a comparator for generating a noise timing signal corresponding to a noise producing period of noise introduced from a noise source and contained in an audio signal, a gap time generator for generating a gap period in which to remove noise from the audio signal, a selector switch for selectively outputting the audio signal and a noise-removed signal, a level detector for detecting a signal level of the audio signal, and a masking degree determining unit for determining from the signal level detected by the level detector a gap period for which the audio signal is masked by the human auditory system. The selector switch outputs the noise-removed signal in a period corresponding to the gap period within the noise producing period of the noise timing signal, and outputs the audio signal in other than the gap period.

Abstract: A microphone apparatus of the present invention is applied to a camera including a panel type view finder for displaying a picture taken by the camera, a touch panel for pointing a desired position of the picture displayed on the view finder, determining circuit for determining a direction of the real picture in accordance with the position pointed by the touch panel, a microphone device having a plurality of microphone units for collecting a sound that comes from the picture taken by the camera; and directivity generating circuit for generating a sound directivity signal with which the microphone device collects the sound coming from the direction determined by the determining circuit.

Abstract: To achieve vibration-dependent noise reduction by the use of a microphone to pick up an audio signal and a vibration sensor. The microphone apparatus according to a preferred embodiment of the present invention is one having one or more microphone, one or more sensor, noise extraction means for extracting the noise bandwidth section from the output signal of the sensor, an adaptive filter coordinated with the microphone for receiving the output signal of the noise extraction means as the reference input signal, and an adder for subtracting the output signal of the adaptive filter from the output signal of the microphone, wherein the vibration detection directions of the microphone and the sensor match, and so do the output polarities of the vibration signal.

Abstract: A method and apparatus for determining an interpolated value for an audio data error sample included within a plurality of audio data samples. The audio data error sample may be replaced with the determined interpolated value so as to conceal the error sample. Such method and apparatus involves detecting an error pattern which corresponds to the presence or absence of errors of a number of data samples before and after the error sample to be concealed, obtaining coefficients based upon the detected error pattern, and processing the audio data samples and coefficients in a manner corresponding to an interpolating equation of an nth degree (where n=1, 2, 3 . . . ) so as to obtain the interpolated value. Such interpolating equation may correspond to a Lagrange polynomial equation.

Abstract: An electronic apparatus for providing indications on a display device representative of respective ones of a plurality of abnormal states of the apparatus. The apparatus includes a detection device for detecting a state of the electronic apparatus from among a plurality of states; a judgment device for judging whether the detected state is one of a plurality of predetermined abnormal states and for providing therefrom an output signal representative of the detected state; and a display controller device responsive to the output signal for controlling the display device so as to cause a respective indication to be displayed on the display device in a predetermined color.

Abstract: This invention relates to a highly corrosion-resistant, multi-layer coated steel sheet, and includes an undercoat film obtained by galvanization or zinc-alloy plating and a chromate coated film thereon, on which a resin-composition film is further applied, comprising an organic high-molecular weight resin having a glass transision temperature of 343.degree. to 423.degree. K. and soluble in organic solvent and hydrophobic silica.For the purpose of improvement of corrosion preventiveness, a sparingly water soluble Cr compound may be contained in this resin composition film. Together with this sparingly water soluble Cr compound, a di- or tri-alkoxysilane compound may be also contained in the resin composition film.

Abstract: The present invention relates to a highly corrosion-resistant surface-treated steel plate. The steel plate of the present invention comprises a zinc deposition or zinc alloy deposition film as the undercoat deposition layer, a chromate film formed on the undercoat deposition layer and a film of a resin composition formed on the chromate film. This resin composition comprises a base resin formed by adding at least one basic nitrogen atom and at least two primary hydroxyl groups to terminals of an epoxy resin. The resin composition may comprise a polyisocyanate compound as the curing agent. Furthermore, the resin composition may comprise silica or a hardly soluble chromium compound as the additive for improving the corrosion resistance. Moreover, the resin composition may comprise a silane compound as the crosslinking agent for the base resin and silica.