Sharp Kabushiki Kaisha Corporation

Seiichi Gohshi

Takaji Numao

Takashi Mine

A signal processing device that processes sharpening of an image with respect to an input signal (SR) that represents the image and outputs an output signal (SO) that represents the sharpened image includes an oversampler that generates an oversampled signal by interpolating a signal in order to increase a sampling frequency with respect to an input signal (SR), and a sharpening processing unit to which the oversampled signal is inputted and which generates a sharpened signal in which high frequency band components in the oversampled signal are nonlinearly monotonically increased in a broad sense, and the sharpened signal is outputted as the output signal (SO).

Signal processing device, control program and integrated circuit

A signal processing device subjects a signal indicating a moving image constituted by frames to a sharpening process for the moving image, to output a signal indicating the sharpened moving image, and includes: a motion detection section for detecting motion between the frames for each block region including one or a plurality of adjacent pixels constituting each frame; a sharpening process section for subjecting a signal indicating an image of a block region from which motion has been detected to a nonlinear process by a nonlinear process section and sharpening the signal to generate a harmonic; and a signal output section for outputting, for the block region from which motion was detected, the harmonic produced by sharpening a signal indicating a moving image of the block region, while outputting, for a block region from which motion was not detected, a signal indicating a moving image of the block region.

Signal processing device and control program for sharpening images

Disclosed is a decoding device (a) that outputs an output signal by receiving, as an input, an encoded signal including a signal in which an original signal is encoded, the original signal being indicative of contents of at least one of image and audio, and the output signal being indicative of the contents, which decoding device includes a decoding process section () that generates a decoded signal be decoding the encoded signal, and a nonlinear process section () that generates a nonlinear process signal (i) in which positive and negative signs of a low-frequency-free signal are retained, which low-frequency-free signal is obtained by removing from the input signal at least a direct current of frequency components included in the decoded signal, and (ii) which broadly monotonically increases nonlinearly with respect to the low-frequency-free signal when values of the low-frequency-free signal are at least in the vicinity of 0; the nonlinear process signal is added to the decoded signal, to generate the output signal.

Decoding device with nonlinear process section, control method for the decoding device, transmission system, and computer-readable recording medium having a control program recorded thereon

Disclosed is an encoding device, which is an encoding device that outputs an encoded signal including a signal in which an original signal is encoded, the original signal indicative of at least one of image and audio, which encoding device includes a frequency component extraction section that extracts a part of frequency components of the original signal from the original signal to generate a frequency component extraction signal and an encoding process section that encodes the frequency component extraction signal and the original signal while switching between the frequency component extraction signal and the original signal, and making the signal thus encoded be included in the encoded signal.

Encoding device configured to generate a frequency component extraction signal, control method for an encoding device using the frequency component extraction signal, transmission system, and computer-readable recording medium having a control program recorded thereon

A signal processing device () subjects an input signal indicating an image to a process of sharpening the image and outputs a signal indicating the sharpened image, and includes: a two-dimensional filter () for removing, from the input signal, a high frequency component of frequency components in directions other than horizontal/vertical directions of the image indicated by the input signal, to generate an obliquely reduced signal; a sharpening process section (A) for generating a sharpened signal (S) by a nonlinear process section () performing a nonlinear process on a signal indicating pixels adjacently aligned in a horizontal direction of an image indicated by the obliquely reduced signal; and a sharpening process section (B) for generating a sharpened signal (S) by a nonlinear process section () performing a nonlinear process on a signal indicating pixels adjacently aligned in a vertical direction of an image indicated by the sharpened signal (S).

Signal processing device, and integrated circuit including oblique lowpass filtering and multiple sharpening components

An image processing system for processing a target pixel to be processed, which target pixel corresponds to inputted image data, a plurality of pixels including the target pixel being arranged in a matrix manner, includes an NR circuit (). The NR circuit () includes a signal processing process circuit () for carrying out subtraction or addition, with respect to a pixel value Aij of the target pixel, of a value equivalent to a noise quantity Er calculated in advance, in a case where the pixel value Aij of the target pixel is larger or smaller, respectively, than a first couple of estimated values Bij and Cij for the pixel value Aij of the target pixel, the first couple of estimated values Bij and Cij being estimated from pixel values of respective pixels adjacent to the target pixel, centered at the target pixel, in a temporal axis or in a spatial axis. It is therefore possible to provide an image processing system which further reduces noise and is less likely to blur a video as compared with a conventional noise reduction process.

Image processing system and display device for carrying out subtraction or addition of a pixel value of a target pixel in accordance with a value equivalent to a noise quantity

A motion detection device () receives a signal indicative of a moving image and detects motion between frames with respect to each block region consisting of one or a plurality of adjacent pixels constituting each frame constituting the moving image, and includes: a difference calculation section () for obtaining a difference signal (S) indicative of a difference between adjacent two frames; a first edge detection section () for obtaining, with respect to each block region, a first edge signal (S) included in one of the two frames; a second edge detection section () for obtaining, with respect to each block region, a second edge signal (S) included in the other of the two frames; an edge calculation section () for obtaining, with respect to each block region, an edge signal (S) by adding a product of the first edge signal (S) and a first coefficient to a product of the second edge signal (S) and a second coefficient; and a division section () for obtaining, with respect to each block region, a motion signal (S) by dividing the difference signal (S) by the edge signal (S).

Motion detection device, control program, and integrated circuit

A signal processing device () includes noise reduction units (), cascade-connected to each other, each of which includes: a signal selection section () for selecting a representative value from sampled signals obtained from an input signal by sampling a target signal and signals which are away from the target signal by given intervals; a voltage determination section () for determining which of a determined representative value and a voltage of the target signal is larger; and a signal output section () for increasing or decreasing the voltage of the target signal depending on a result of the determining and outputs the target signal as the output signal. A combination of intervals between the target signal and the signals excluding the target signal vary from noise reduction unit () to noise reduction unit (). A noise reduction unit on a more upstream side has a larger maximum value of the intervals.

Signal processing device, integrated circuit, control program, and computer readable recording medium

A liquid crystal display device () of the present invention includes an NR circuit () for carrying out a signal processing process in which a predetermined noise amount is added to or subtracted from data of a target pixel in accordance with a result of a comparison of signal levels between the target pixel and at least two surrounding pixels which are beside the target pixel, the NR circuit () adding or subtracting the predetermined noise amount to or from data of respective pixels adjacent to each other temporally or positionally in respective different signal processing processes. This allows providing a liquid crystal display device having a noise reduction effect. It is thus possible to provide a liquid crystal display device enabling less blur of an image after a noise reduction process.

Image processing system and display device

A signal processing device first decomposes an input signal into a plurality of frequency components in different frequency ranges, then causes a higher harmonic wave generating section to generate a higher harmonic for each of a part or all of frequency components obtained by removing a frequency component in the lowest frequency range from frequency components obtained by the decomposition, and finally composes (i) the higher harmonic thus generated and (ii) a frequency component for which no higher harmonic has been generated. The higher harmonic wave generating section adds the frequency component and a nonlinear process signal (i) in which positive and negative signs of a frequency component for which the higher harmonic is to be generated are retained and (ii) which broadly monotonically increases nonlinearly with respect to the frequency component when the frequency component is located at least in the vicinity of zero.

Signal processing device, control method for signal processing device, control program, and computer-readable storage medium having the control program recorded therein

A waveform shaping device shapes a waveform of an externally input signal and outputs the input signal with the shaped waveform as an output signal to an equalizer for compensating a distortion of a signal, and includes a nonlinear process section for generating a nonlinear process signal (i) in which positive and negative signs of a low-frequency-free signal obtained by removing at least a direct current component from frequency components of the externally input signal are retained and (ii) which broadly monotonically increases nonlinearly with respect to the low-frequency-free signal when values of the low-frequency-free signal are at least in the vicinity of 0, the nonlinear process signal being added to the low-frequency-free signal so as to generate the input signal.

Waveform shaping device, equalizer, receiving system, method of controlling waveform shaping device, control program, and computer-readable medium in which control program is recorded

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Osaka, Japan

Seiichi Gohshi