Abstract: An image processing device has a communication module which performs information communication with a color gamut information providing device for providing color gamut information concerning a color gamut of video data of a received broadcast program, a controller which acquires the color gamut information of the video data from the color gamut information providing device through the communication module, and an image quality corrector which restores the color gamut of the video data of the broadcast program, based on the color gamut information acquired by the controller.

Abstract: According to one embodiment, there is provided an image signal processing apparatus includes an interlace-to-progressive conversion circuit and a resolution enhancement circuit. The interlace-to-progressive conversion circuit outputs first signals by performing an interlace-to-progressive conversion process on image signals. The resolution enhancement circuit outputs second signals by performing a resolution enhancement process on the first signals. The resolution enhancement circuit performs the resolution enhancement process not on the first signals on which an interpolation process for dynamic images have been performed.

Abstract: According to one embodiment, a frame interpolation device includes a detecting section which receives a frame signal of 60 Hz and outputs a pull-down detection signal when determining that the frame signal is a pull-down signal, a generation section which generates a first frame signal of 120 Hz by use of a first insertion pattern based on the frame signal of 60 Hz and a second frame signal of 120 Hz by use of a second insertion pattern, and a selecting section which outputs the first frame signal by the first insertion pattern when the pull-down detection signal is not received and outputs the second frame signal of 120 Hz of the second insertion pattern when the pull-down detection signal is received.

Abstract: According to one embodiment, an IP converter converts an interlaced color difference signal, in which the number of pixels in a vertical direction of a color difference signal is half that of a luminance signal, into a progressive color difference signal. A diagonal correlation detector detects a diagonal correlation of the progressive color difference signal, and obtains a correlative direction detected signal. A controller outputs a field selection signal to determine whether the progressive color difference signal is a signal in a top or bottom field. And a pixel generator changes a ratio between pixels of an nth and an n+1th line of the progressive color difference signal according to the field selection signal, when generating a new pixel by using corresponding pixels of the nth and n+1th lines based on the correlative direction detected signal.

Abstract: According to one embodiment, an IP converter converts an interlaced color difference signal, in which the number of pixels in a vertical direction of a color difference signal is half that of a luminance signal, into a progressive color difference signal. A diagonal correlation detector detects a diagonal correlation of the progressive color difference signal, and obtains a correlative direction detected signal. A controller outputs a field selection signal to determine whether the progressive color difference signal is a signal in a top or bottom field. And a pixel generator changes a ratio between pixels of an nth and an n+1th line of the progressive color difference signal according to the field selection signal, when generating a new pixel by using corresponding pixels of the nth and n+1th lines based on the correlative direction detected signal.

Abstract: According to one embodiment, an image processor includes: a luminance calculator configured to calculate a luminance of an illumination light based on an image signal, the illumination light illuminating a display screen displaying the image signal; a gradation corrector configured to correct a first gradation of the image signal to a second gradation, based on the luminance; a parameter determining module configured to determine a parameter of gradation smoothing process to be performed on an amplitude of the image signal based on the luminance; and a processing module configured to perform the gradation smoothing process on the image signal with the second gradation, by using the parameter.

Abstract: According to one embodiment, a video signal sharpening apparatus includes a video signal sharpening module and a sharpening parameter controller. The video signal sharpening module performs a sharpening process on a decoded video signal based on a sharpening parameter. In the sharpening process, the video signal sharpening module estimates an original pixel value from the decoded video signal and increases the pixels to obtain a high-resolution video signal. The decoded video signal is obtained by a decoder decoding an encoded video signal. The sharpening parameter controller determines the amount of variation in noise and detail component that varies by an I-frame period in a group of pictures (GOP) period of the decoded video signal, and controls the sharpening parameter for the video signal sharpening module.

Abstract: A data interpolation apparatus at intermediate pixels between upper and lower pixels. An upper oblique correlation is calculated between data of an immediate upper pixel and a corresponding lower pixel positioned downward in a maximum correlation direction with respect to the immediate upper pixel. A lower oblique correlation is similarly calculated between data of an immediate lower pixel and a corresponding upper pixel. An interpolation signal is obtained by mixing an oblique pixel sum and a vertical pixel sum, while changing mixing ratio based on a comparison of a vertical correlation, and the upper and lower oblique correlation. When the interpolation signal is constituted without the vertical pixel sum, an interpolation signal with respect to intermediate pixels immediate upward/downward of the corresponding lower/upper pixel is generated by excluding a vertical sum that includes data of the corresponding upper and/or lower pixels.

Abstract: According to one embodiment, a video signal interpolation apparatus has: a correlation calculating unit calculating correlation calculation values by correlating each of a plurality of peripheral pixels with another plurality of peripheral pixels existing in a periphery of an object interpolation pixel; a sub-pixel estimation unit estimating a position of sub-pixel having an equivalent luminance value to that of the respective peripheral pixel based on the plurality of correlation calculation values calculated for each of the plurality of peripheral pixels; and a weighted average calculating unit calculating a weighted average of a pixel value in accordance with distances between each of the sub-pixel and the object interpolation pixel to determine a pixel value of the object interpolation pixel.

Abstract: According to one embodiment, a video signal processing apparatus has a scaling processing unit configured to perform scaling processing on a video signal, an expansion processing unit configured to perform expansion processing on a video signal, and a switching unit configured to switch whether the scaling processing unit uses a video signal after being expanded by the expansion processing unit or uses the video signal before being expanded by the expansion processing unit according to a resolution of the video signal inputted to the expansion processing unit.

Abstract: According to one embodiment, there is provided an image signal processing apparatus includes an interlace-to-progressive conversion circuit and a resolution enhancement circuit. The interlace-to-progressive conversion circuit outputs first signals by performing an interlace-to-progressive conversion process on image signals. The resolution enhancement circuit outputs second signals by performing a resolution enhancement process on the first signals. The resolution enhancement circuit performs the resolution enhancement process not on the first signals on which an interpolation process for dynamic images have been performed.

Abstract: According to one embodiment, a frame interpolation device includes a detecting section which receives a frame signal of 60 Hz and outputs a pull-down detection signal when determining that the frame signal is a pull-down signal, a generation section which generates a first frame signal of 120 Hz by use of a first insertion pattern based on the frame signal of 60 Hz and a second frame signal of 120 Hz by use of a second insertion pattern, and a selecting section which outputs the first frame signal by the first insertion pattern when the pull-down detection signal is not received and outputs the second frame signal of 120 Hz of the second insertion pattern when the pull-down detection signal is received.

Abstract: According to one embodiment, a video signal scaling apparatus converts an input video signal and outputs as a scaling video signal while enlarging or reducing the number of pixels. The video signal scaling apparatus includes an adaptive interpolation circuit converting the input video signal and outputting as an interpolation video signal of which pixels are interpolated, and a scaling circuit converting the inputted video signal and enlarging or reducing the number of pixels with an arbitrary scale. Further, the video signal scaling apparatus includes a selection circuit selectively inputting either of the interpolation video signal outputted from the adaptive interpolation circuit or the input video signal to the scaling circuit based on a selection control signal inputted from external, and a scaling control circuit switching a parameter relating to the conversion at the scaling circuit based on the selection control signal.

Abstract: According to one embodiment, a video signal diagonal interpolation apparatus performs a diagonal interpolation in a high correlation diagonal direction having the highest correlation in a video signal and a delay signal in which the video signal is delayed. The video signal diagonal interpolation apparatus has a longitudinal-diagonal correlations detection device respectively detecting an upper side diagonal correlation along the high correlation diagonal direction of an upper side pixel positioning at an upper side of an interpolation pixel, and a lower side diagonal correlation along the high correlation diagonal direction of a lower side pixel positioning at a lower side of the interpolation pixel, as for the interpolation pixel disposed at an interpolation position in the high correlation diagonal direction.

Abstract: According to one embodiment, a horizontal noise reduction circuit is supplied with an input video signal and the filter characteristic thereof is controlled by a noise reduction level setting value. A frame delay circuit delays the input video signal by a period of one frame. An inter-frame difference amount information counting circuit outputs a count value obtained by counting a preset logical value of a binary-coded output derived based on a difference between a frame delay video signal and the input video signal for one screen. A noise reduction level generator generates a noise reduction level setting value corresponding to the count value and supplies the same to the horizontal noise reduction circuit and vertical noise reduction circuit as a control signal.

Abstract: An apparatus for processing a video signal comprises a circuit for performing a first order differentiation processing to a received video signal, a circuit for adjusting a level of a video signal with the first order differentiation processed thereto, a circuit for generating a pixel position signal indicating an output pixel position on the basis of a scaling coefficient to acquire an output video signal from the received video signal, a circuit for adding an output signal from the circuit to the generated pixel position signal and acquiring a corrected pixel position signal, and a circuit for performing a scaling calculation processing to the received video signal and acquiring a scaled video signal, on the basis the corrected pixel position signal.

Abstract: A method for applying a corrosion-protective coating, with a heat-shrinkable tube, to a joint between welded end portions of corrosion-protectively coated steel pipes, has a configuration comprising the steps of: preparing a coating implement having a releasant layer formed on the outer circumferential portion of the heat-shrinkable tube, and a heating layer formed on the outer circumferential portion of the releasant layer; positioning the coating implement so as to cover the welded portion of the joint and its adjacent portions; thermally shrinking the coating implement in a state in which the gap between the coating implement and the aforementioned portions is kept in a vacuum; and removing the releasant layer and the heating layer, whereby the aforementioned portions are corrosion-protectively coated by the heat shrinkage of the tube.

Abstract: In a joint between welded end portions of corrosion-protectively coated steel pipes, a heat-shrinkable tube is positioned so as to cover the outer circumference of a welded portion and the outer circumferences of its adjacent portions, and the heat-shrinkable tube is thermally shrunk in a state in which a gap between the heat-shrinkable tube and the aforementioned portions is kept in a vacuum so that the aforementioned portions are corrosion-protectively coated with the heat-shrinkable outer layer of the heat-shrinkable tube thus thermally shrunk.