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7567724 |
Image processing apparatus, image processing method, program of image processing method, and recording medium in which program of image processing method has been recorded
The present invention is applied, for example, to resolution conversion. An edge gradient direction v 1 with the largest gradient of pixel values and an edge direction v 2 orthogonal to the edge...
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7440035 |
Cable extending device
Attenuation compensation volume computing means ( 60, 61, 62, 63, 67, 68, 69, 70 ) of a signal receiver computes attenuation compensation volume of a video signal (G L , G H ) on the basis of...
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7047556 |
Method and apparatus for equalizing video transmitted over twisted pair cable
A apparatus and apparatus for compensating for video insertion loss due to transmission over long twisted pair cable lines is presented. Transmission of video over twisted pair cable is...
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6724437 |
Method and device for adding noise to a video signal for improving a display of the video signal
In a display driving method, noise is added (NG, AD) to a video signal before the video signal is subjected to a dithering operation (DC). The invention is preferably applied to render non-moving...
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6665021 |
System and process for filtering single tone signals
A signal processing system and process for digitally filtering a single tone digital signal is disclosed. The system includes a single tone signal generator, which may or may not perform frequency...
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6400415 |
System and method for predistorting signals to be amplified
A system and method for predistorting a signal which is to be amplified by a non-linear amplifier. The system and method uses additional predistortion circuits to eliminate the predistortion caused...
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6320622 |
De-emphasis filter with integrated determination of achromatic values
A digital de-emphasis filter for a SECAM decoder for converting a sequence of input image data into filtered image data includes at least one recursion register for storing an auxiliary value that...
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6298085 |
Source encoding using shuffling of data to provide robust error recovery in a burst error-environment
A system and method for source coding a signal to localize transmission errors to a set of samples is disclosed. The signal comprises a plurality of signal elements (SEs) with each SE having a...
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5929942 |
Computer system and computer implemented process for editing video fields
A computer implemented method for editing a video frame is disclosed. The video frame comprises scan lines of a first video field interlaced with scan lines of a second video field, and the scan...
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5926509 |
Twisted pair communicatons line system
A transmission system for transmitting analog color video signals wherein a cable comprising multiple twisted pairs is employed, and certain of these pairs are coupled to carry selected color...
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5757436 |
Image processor system
An image-processor system for compensating for accumulated phase-and-gain errors incurred during transmission of a video signal over a communications channel. The image-processor system comprises...
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5671066 |
Apparatus for recording and reproducing video signals with preemphasis and deemphasis processes
A video signal recording and reproducing apparatus comprises a magnetic tape (4) into which video signals are recorded. A preemphasis circuit (35) modifies the video signals prior to the recording...
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5629742 |
Compatible non linear pre-emphasis for composite video signals
When a video signal including a component modulated onto a subcarrier (such as a PAL signal) is subjected to a non-linear pre-emphasis known for MAC signals, with the object of reducing the effects...
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5598225 |
Method and apparatus for improving transmitted video signal structure
A video processor, having an input and an output, for compensating for accumulated phase and amplitude errors encountered during transmission of a video signal over a communications channel. The...
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5572249 |
Method and apparatus for optimal NTSC rejection filtering and transmitter and receiver comprising same
The invention comprises an optimal causal, monic (first coefficient of filter is 1) NTSC rejection filter for use at an ATV receiver which is designed to optimally process the interference caused...
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5563915 |
Data deinterleaver in a digital television signal decoding system
A television signal receiving system includes a deinterleaving network (18) containing first and second deinterleaving functions associated with respective memory address controllers (20, 25). One...
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5535246 |
Method of video noise reduction using non-linear pre/de-emphasis
A method of pre-emphasising a signal comprises the steps of a) receiving the signal as an input; b) applying the input signal to a processing system comprising a pair of parallel signal processing...
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5533049 |
Method, digital signal processing module and system for efficiently selecting a pre-emphasis filter during line probing
The present invention provides a pre-emphasis selection method, digital signal processing module and digital communication system that use computations based on channel spectrum measurements for...
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5526136 |
Method and apparatus for reproducing a video signal subject to pre-emphasis
An image is stably reproduced in a special reproduction mode of still, frame advance or slow motion mode without residual image and/or blur. A video signal reproducing apparatus operates to...
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5493341 |
Digital non-linear pre-emphasis/de-emphasis apparatus for video signals in a video signal recording and reproducing apparatus
A digital non-linear pre-emphasis/de-emphasis apparatus includes a first filter for multiplying an input signal by a first coefficient varying non-linearly according to the amplitude of the input...
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5438369 |
Digital data interleaving system with improved error correctability for vertically correlated interference
A digital data transmission system for signals in the areas of interference having a high degree of vertical correlation comprises a transmission frame including a plurality of vertically arranged...
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5432562 |
Television signal reception
In a television signal receiver, including an intermediate frequency (IF) filter (3) having an intermediate frequency filter group delay, and an intermediate frequency (IF) demodulator (5) coupled...
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5313298 |
Video companding method and system
A companding technique takes advantage of spatial masking in order to avoid problems from noise and/or distortion introduced when storing or transmitting video signals. A forward companding or...
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5276403 |
Nonlinear preemphasis-deemphasis system
A nonlinear preemphasis-deemphasis system of simplified circuit configuration formed of nonlinear preemphasis and deemphasis circuits. The preemphasis circuit comprises a nonlinear signal increase...
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5225910 |
Adaptive operation type low noise television system
A cooperative adaptive low noise television system provides that, prior to transmission, the composite video is separated into chroma and luminance components. The luminance signal is adaptively...
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5208707 |
Circuit for maintaining compatibility between different image systems during reproduction having an adaptive de-emphasis unit
Disclosed is a circuit for maintaining compatibility between different image signal recording/reproducing systems. An adaptive de-emphasis unit is attached to the output of the folding frequency...
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5187590 |
Luminance signal recording circuit and method for maintaining compatibility in reproducing between different video systems
An improved adaptive folding circuit for a video signal recording/reproducing system. The improved adaptive folding circuit has an adaptive emphasis circuit and an adaptive deemphasis circuit for...
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5144435 |
Noise immunity in N signals
An arrangement for a television receiver to attenuate correlated noise injected by the transmission medium. Recognizing that there is substantial line to line correlation of the transmission noise...
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5144434 |
Video signal processing device using look-up table
A video signal processing device is arranged to supply a digital video signal to an infinite impulse response digital filter, to supply the digital video signal from the filter to a look-up table...
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5126846 |
Non-linear amplifier and non-linear emphasis/deemphasis circuit using the same
A non-linear amplifier circuit comprises a low band eliminating filter for receiving an input signal from an input terminal, a logarithmic amplifier and an adder for adding the output signal of...
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5097336 |
Signal processing apparatus
A signal processing apparatus of this invention is an apparatus arranged to amplify a predetermined frequency component of an input signal on the basis of a predetermined amplification...
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5079633 |
Video signal processor for removing high frequency noise component
A video signal processor comprises a first filtering circuit, a first and a second emphasis circuits, a noise removing circuit, and a converter. The first filtering circuit filters an input video...
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5060056 |
Luminance signal/color signal separating circuit and noise reduction circuit using a comb filter
A luminance signal/color signal separating circuit comprises a comb filter for Y/C separation. The addition output of the comb filter comprises a luminance signal component, while the subtraction...
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5027210 |
Noise reduction in high definition television signals
In a high definition multiplexed analog component system, a high definition signal is processed by splitting it into high and low frequency components and pre-emphasizing the high frequency...
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5016104 |
Receiver-compatible noise reduction systems
Method and systems for combatting degradation in the transmission or storage of data signals especially useful in the field of motion picture or television signal transmission, such that an...
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5014119 |
Horizontal and vertical transition level enhancement within television system
A television signal processing system includes a source of video images for providing luminance and chrominance components of the video images by generating and putting out scan lines. The source...
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5014118 |
Luminance signal processing circuit using 3 line logical comb filter
A luminance signal processing circuit of a VCR functions as a non-correlation component enhancement circuit during recording, and as a line correlation noise reduction circuit during reproduction....
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5010410 |
Method and apparatus for signal companding
A method and apparatus for signal companding is disclosed that incorporates a log-offset companding technique to provide both a high bandwidth over the dynamic range of the signal being processed...
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5005082 |
Video signal compander adaptively responsive to predictions of the video signal processed
A video signal transmission system includes adaptive compansion circuitry to improve the signal-to-noise ratio of transmitted signals. A compandor at the transmitter, and corresponding inverse...
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4992873 |
Video signal noise reduction apparatus using amplitude companding and predictive signal processing techniques
A video signal processing system employs an amplitude compander for reducing the effects of transmission noise. The compander includes a transmitter nonlinear amplitude compressor for amplifying...
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4980767 |
Technique for determining signal dispersion characteristics in communications systems
The present invention covers the notion of determining signal dispersion characteristics, such as amplitude, phase and delay, by transmitting training sequences. More specifically, each sequence...
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4939577 |
Receiver and demodulation circuit suitable for said receiver
In a receiver for television signals which are frequency-modulated on a carrier, having a demodulation circuit provided with a frequency demodulator (19), a detector (29, 35) with a level detector...
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4918515 |
Compatible television transmission system with separate preemphasis path within single channel
A method for reducing noise and interference artifacts in a television system including a transmissiion end for transmitting a quadrature modulated color subcarrier television signal through a...
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4882618 |
FM signal demodulator for video signal reproducing apparatus
An FM demodulator for a video signal reproducing apparatus, which is responsive to an input FM luminance signal. The FM demodulator includes an FM demodulation circuit for changing the input FM...
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4864404 |
Noise reduction circuit of a video signal
A noise reduction circuit for use in a video signal recording and/or reproducing apparatus for eliminating noise components from an input luminance signal comprises a high pass filter circuit for...
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4860105 |
Noise Reducing circuit of a video signal
A noise reduction circuit for a video signal recording and/or reproducing apparatus comprises a high pass filter for extracting high frequency signal component form the input luminance signal, a...
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4849826 |
Digital non-linear pre-emphasis/de-emphasis apparatus for eliminating noise components from video signals in a video signal processing system
A digital non-linear pre-emphasis/de-emphasis apparatus is arranged such that a frequency band of a high-pass filter for extracting a high frequency component signal of an input signal is varied...
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4837611 |
Wideband NTSC-compatible transmission system with noise reduction processing
A method and apparatus for encoding and detecting a wide band quadrature modulated color television signal which is NTSC format compatible is disclosed. The encoding steps include: generating an...
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4779133 |
Low-noise television system
A low-noise televison system having means for suppressing increased noise without reduction of improved picture quality. In the television broadcast transmitter, a television video signal is...
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4750037 |
Noise reduction system for video signal
A noise reduction system for reducing noise in a video signal comprises a pre-emphasis circuit for subjecting the video signal which is supplied to a transmission system to a pre-emphasis in a...
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