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Class 348/623 - Coring type


Subclass of Class 348 - Television
Definition: Subject matter including a circuit element (e.g., diode)
No. of patents: 57
Last issue date: 07/08/2008


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NumberTitleIssue Date
7397497Display device capable of reducing burn-in on display panel
A display device having a prolonged lifetime by preventing deterioration of image quality by reducing a burn-in is provided. A display device includes a still image region detecting unit for detecting still image data from video data, a detecting unit for detecting,...
07/08/2008
7307657Video signal processing method and device for processing luminance signal
In a video signal processing method of processing a luminance signal of a video signal generated by causing a CCD to receive light transmitted through color filters, a control signal yf1 is generated by calculating Cy/Y using a complementary color signal Cy a...
12/11/2007
7280161Noise reduction circuit and method
A noise reduction circuit and method effectively reduce noise with a simple structure regardless of the partial content of an image while suppressing an increase in the capacity of the image memory used and process delays. The present invention forms noise-reduced d...
10/09/2007
7190841Image noise reduction circuit
An image noise reduction circuit includes an image correction portion which is responsive to a timing pulse signal to reduce a noise in an input image signal based on a difference data and to generate a corresponding output image signal, a difference detecting porti...
03/13/2007
7119774Reducing sparkle artifacts with low brightness filtering
A video signal is decomposed into a higher brightness level signal and a lower brightness level signal. The threshold between higher and lower brightness levels is adjustable and related to the transition between lower and higher gain portions of the gamma table for...
10/10/2006
7071909Reducing sparkle artifacts with low brightness processing
A method for reducing sparkle artifacts in a liquid crystal imager, comprises the steps of: low pass filtering only a first lower brightness level signal component of a video signal; and, slew rate limiting only a second lower brightness level signal component of th...
07/04/2006
7064793Method and apparatus for measuring the noise contained in a picture
To determine the noise contained in a picture, it is proposed first to determine homogeneous picture regions of the picture (100-102) and then to measure the high-frequency signal component in these homogeneous picture regions (BR). The measurement of the hig...
06/20/2006
7034892Spatio-temporal filter unit and image display apparatus comprising such a spatio-temporal filter unit
Noise reduction is an important feature in consumer television. This is realized by spatial, temporal or spatio-temporal filters. Spatial filters require pixels from within one image, while temporal filters require samples from two or more successive images. The spa...
04/25/2006
6947060Image forming apparatus, electron beam apparatus, modulation circuit, and image-forming apparatus driving method
An image forming apparatus which performs pulsewidth modulation with a pulsewidth set by counting a clock. Especially, for grayscale level correction by setting the frequency of the clock, the periodic clock is counted, and an output pattern is changed in accordance...
09/20/2005
6947099Automatic chroma control circuit with controlled saturation reduction
An ACC system includes a controllable amplifier having an input coupled to receive a chroma input signal and an output for providing an chroma output signal of controllable amplitude. A first feedback path, including a cascade connection of means for providing a sig...
09/20/2005
6930729Apparatus and method for deleting sawtooth wave
An apparatus and method for processing a video signal, and particularly, an apparatus and method for deleting a sawtooth wave are provided in which a sawtooth wave component is detected and with consideration of direction the sawtooth wave is deleted. The sawtooth w...
08/16/2005
RE38771Exposure controller having coring value adapted to the discharge pulse count
An exposure controller comprises a discharge pulse calculation circuit for calculating a discharge pulse count to be output to a solid-state image pickup device within one field period, and a coring circuit for defining the quotient obtained from the discharge pulse...
08/09/2005
6148116Method and circuit for adaptively enhancing contour components of a luminance signal
A contour enhancement method and circuit for adaptively enhancing a contour component of a luminance signal. In the method, a coring operation is performed with respect to the contour component. For the coring operation, a coring value is used which is ad...
11/14/2000
6122016Video signal processing
In a method of processing a video signal, including the step furnishing (11) a filtered signal in response to the video signal, the filtering is adapted (22) in dependence upon a statistical property (AC) of a modification effected by the filtering in a p...
09/19/2000
6115071Video signal compression apparatus using noise reduction
Noise reduction circuitry, in a video signal compression apparatus of the predictive DPCM compression type includes a simple nonlinear processing element within the DPCM loop to eliminate residues between predicted and real image signals, which are smalle...
09/05/2000
5956095Noise suppression apparatus
A noise suppression apparatus suppresses noise of a luminance signal, for example, at a fringe of area of reception in a television receiver. The noise suppression apparatus includes a tuner circuit, an intermediate frequency amplification circuit, a vide...
09/21/1999
5815011Circuit for adjusting the coring threshold of a signal
A circuit provides an output signal having a portion with a constant maximum amplitude, followed by a portion decreasing down to a constant zero value when an input voltage increases from zero. The circuit includes an asymmetrical differential stage havin...
09/29/1998
5790205Method of increase sharpness in digital displays
A method for processing video data for increased sharpness. The data undergoes a process by which it is filtered in two dimensions. Using separable, one-dimensional filters, the process cores the data to prevent noise enhancement and applies gain to the r...
08/04/1998
5745188Apparatus for suppressing interference in television video signal
An apparatus for suppressing interference in a television video signal comprises series connected a high-pass filter (1), an electronic switch (2) and a low-pass filter (4), and a video signal front detector (3) having its input connected to the output of...
04/28/1998
5657097Method and apparatus for generating a peaking signal
A coring circuit for an input signal in the form of a differential input current having two components in phase opposition. A first pair of cascode transistors biased by a first reference voltage applies a first fraction of each of the components of the d...
08/12/1997
5606375Method for enhancing detail in color signals and circuitry for implementing that method in color video equipment
In video signal processing circuitry detail enhancement is done on each of three color channels in response to the detail information, the enhancement of the detail in each color channel being done in reliance on separated high-spatial-frequency informati...
02/25/1997
5479215Circuit arrangement for improving the quality of a video signal by adding a filtered video signal to a delayed video signal and by using a coring stage for suppressing low level signal components
A circuit arrangement for improving the quality of video signals read out from a storage medium by isolating and processing a radio-frequency component which is added to a delayed video signal. An improvement can be achieved in particular in the signal de...
12/26/1995
5389978Noise eliminative circuit employing a coring circuit
A noise eliminative circuit for eliminating noise components contained in an input image signal in which a high-frequency noise component is eliminated through a coring circuit, and a low-frequency noise component is selectively eliminated by horizontal a...
02/14/1995
5260791Method and apparatus for the spatio-temporal coring of images
A spatio-temporally oriented coring method and apparatus for reducing noise in a sequence of images is disclosed. The method comprises the steps of decomposing each image into low-pass and a prefiltered sub-images, decomposing each prefiltered sub-image i...
11/09/1993
5255078Impulse noise detector for a video signal receiver
An impulse noise detector for detecting impulse noise in video signal includes a band pass filter for passing a band of video signal frequencies centered in the spectral region of video signals which exhibit a relative energy minimum. The band pass filter...
10/19/1993
5159450Noise reduction circuit and compatable plural-unit display
A video image displaying system comprises first video equipment for converting a HDTV video signal to a plurality of video signals of a second format for display on a plurality of television receivers responsive to signals of the second format and second ...
10/27/1992
5155580Side panel signal processor for a widescreen television system
In a television signal processing system of the type which encodes an auxiliary carrier modulated with auxiliary image information in line format, which carrier is placed within the spectral band of standard television signal components, and wherein the m...
10/13/1992
5130798Dual band progressive television system with noise reduction
An input filter separates a luminance input signal into a high frequency component that is noise reduced by coring and a low frequency component that is noise reduced by a frame recursive filter preceded by sub-sampling and followed by sample rate restora...
07/14/1992
5119195Video noise reduction system employing plural frequency bands
An input filter separates a luminance input signal into a high frequency component that is noise reduced by coring and a low frequency component that is noise reduced by a frame recursive filter preceded by sub-sampling and followed by sample rate restora...
06/02/1992
5043802Frame still pictures with no double images
An image pickup apparatus is provided with a first adder which outputs a sum signal by adding a first luminance signal produced from the signals of odd-numbered lines of a solid-state image sensor and a second luminance signal produced from the signals of...
08/27/1991
5031042Noise coring and peaking circuit
A video system includes a scan converter for developing a progressively scanned display of video lines from a two field interlaced line system. A spatial array of six pixels convering two successive video lines is developed and gradients are determined be...
07/09/1991
5025312Motion-adaptive video noise reduction system using recirculation and coring
A method and apparatus are provided for reducing transmission path noise within a video signal so as to provide a noise reduced picture image upon a display. The method comprises the steps of: a. extracting low level picture details and the transmission path n...
06/18/1991
4984074Motion vector detector
A motion vector detector includes a motion vector computing circuit for achieving a computation of a motion vector associated with an input image signal, an integrator circuit for integrating the motion vector, a coring value decision circuit for deciding...
01/08/1991
4962426Dynamic noise reduction circuit for image luminance signal
A noise reduction circuit comprising: a high-pass filter for extracting the high-frequency component of an image signal; a coring circuit for extracting a faint signal component included in the extracted high-frequency component as noise; a low-pass filte...
10/09/1990
4961113Noise reduction circuit
A noise reduction circuit in which a video signal (SI) is divided into a first signal (SL) having low frequency component and a second signal (SH1) having high frequency component, the above second signal (SH1) ...
10/02/1990
4899221Television signal processing apparatus including rise time normalization and noise reduction
The coring circuit in a luminance processor has a characteristic which starts at the O input/O output point and extends linearly in both a positive and negative direction. The characteristic is implemented by a linear amplifier from which the input lumina...
02/06/1990
4766487Chrominance signal processing circuit
A chrominance signal processing circuit having N (Nࣙ2) band-pass filters for dividing a chrominance signal into N regions and N signal processing circuits respectively having different noise eliminating characteristics from each other and each being con...
08/23/1988
4695877Video signal processing apparatus for compensating for time differences between luminance and chrominance signals of a PAL system
A video signal processing apparatus for use in a video tape recorder of the PAL system obtains a composite video signal without causing a vertical color shift on a display screen which would normally be caused by a time difference between a chrominance si...
09/22/1987
4573075Digital signal coring apparatus with controllable coring threshold level
A digital signal processing apparatus includes a digital coring circuit removing samples of digital input signals in a range determined by a digital threshold level signal. The threshold level signal developed by a coring control device is controllable ac...
02/25/1986
4571511Noise reduction system
A noise reduction circuit which operates on the principle of coring includes a variable offset potential source in series with one diode which is connected antiparallel with a second diode. The output terminal of the parallel circuit is connected to an in...
02/18/1986
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