Abstract: An apparatus for motion compensated noise reduction for input images is provided. The motion estimation and motion compensation circuit performs a motion estimation operation and a motion compensation operation on a current image and a previous image to obtain a first patch. The block matching operation circuit performs a block matching operation on the current image and the previous image to obtain a second patch. The motion detection circuit performs a motion detection operation on a target patch according to the first patch and the second patch to output a set of third patches. The current image includes the target patch. The noise reduction circuit performs a noise reduction operation on the set of third patches according to a threshold curve, so as to generate the target patch that the noise is reduced. A method for motion compensated noise reduction for input images is also provided.

Abstract: An apparatus for motion compensated noise reduction for input images is provided. The motion estimation and motion compensation circuit performs a motion estimation operation and a motion compensation operation on a current image and a previous image to obtain a first patch. The block matching operation circuit performs a block matching operation on the current image and the previous image to obtain a second patch. The motion detection circuit performs a motion detection operation on a target patch according to the first patch and the second patch to output a set of third patches. The current image includes the target patch. The noise reduction circuit performs a noise reduction operation on the set of third patches according to a threshold curve, so as to generate the target patch that the noise is reduced. A method for motion compensated noise reduction for input images is also provided.

Abstract: An image processing circuit and a ringing artifact removing method thereof are provided. The image processing circuit includes a deRing detection unit and a deRing filtering unit. The deRing detection unit receives a plurality of display data of an input frame and calculates a regulating reference value corresponding to each display data according to the display data and the display data at adjacent display positions. The deRing filtering unit is coupled to the deRing detection unit. The deRing filtering unit receives the display data and regulates the display data according the regulating reference values respectively corresponding to the display data to output a plurality of regulated display data.

Abstract: An image processing circuit and a ringing artefact removing method thereof are provided. The image processing circuit includes a deRing detection unit and a deRing filtering unit. The deRing detection unit receives a plurality of display data of an input frame and calculates a regulating reference value corresponding to each display data according to the display data and the display data at adjacent display positions. The deRing filtering unit is coupled to the deRing detection unit. The deRing filtering unit receives the display data and regulates the display data according the regulating reference values respectively corresponding to the display data to output a plurality of regulated display data.

Abstract: An apparatus for detecting video film with mix mode is provided. The apparatus includes: a field motion detection unit receiving the field motion value of a current field image or a fed back last field image to detect out at least a motion block; an expanding block unit expanding the motion block into an expanded motion block; a delay unit delaying the received current field image by a predetermined time; an AND processing unit performing an AND processing on the current field image and the last expanded motion block to obtain a confirmed motion block; an inverse telecine (IVTC) unit excluding the confirmed motion block to decide an IVTC mode; a deinterlace unit recovering the continuously input current field image into a video image according to the IVTC mode, wherein the motion block is further recovered with weighted inverse IVTC mode according to a motion intensity value.

Abstract: A flexible video cadence detecting apparatus includes a motion detecting unit, a cycle detecting unit, a film detecting unit, and a de-interlacing unit. The motion detecting unit receives a plurality of continuous field images and determines whether or not there is motion in each field image. The motion detecting unit assigns a first or a second value according to whether or not there is motion in the field image, so as to obtain a value stream. The cycle detecting unit receives the value stream and detects whether or not the first or the second value has a cycle, so as to output a cycle determinant. The film detecting unit receives the value stream and the cycle determinant and determines whether or not the field images are a film, to output a cadence pattern. The de-interlacing unit restores the field images into an original film according to the cadence pattern.

Abstract: A flexible video cadence detecting apparatus includes a motion detecting unit, a cycle detecting unit, a film detecting unit, and a de-interlacing unit. The motion detecting unit receives a plurality of continuous field images and determines whether or not there is motion in each field image. The motion detecting unit assigns a first or a second value according to whether or not there is motion in the field image, so as to obtain a value stream. The cycle detecting unit receives the value stream and detects whether or not the first or the second value has a cycle, so as to output a cycle determinant. The film detecting unit receives the value stream and the cycle determinant and determines whether or not the field images are a film, to output a cadence pattern. The de-interlacing unit restores the field images into an original film according to the cadence pattern.

Abstract: An apparatus for detecting video film with mix mode is provided. The apparatus includes: a field motion detection unit receiving the field motion value of a current field image or a fed back last field image to detect out at least a motion block; an expanding block unit expanding the motion block into an expanded motion block; a delay unit delaying the received current field image by a predetermined time; an AND processing unit performing an AND processing on the current field image and the last expanded motion block to obtain a confirmed motion block; an inverse telecine (IVTC) unit excluding the confirmed motion block to decide an IVTC mode; a deinterlace unit recovering the continuously input current field image into a video image according to the IVTC mode, wherein the motion block is further recovered with weighted inverse IVTC mode according to a motion intensity value.

Abstract: A filter for reducing image noise including a sum of absolute difference (SAD) unit and a weighting unit is provided. The SAD unit receives pixels of a target window and receives multiple pixels of multiple peripheral windows, which are neighboring to a target pixel of the target window. Each of the peripheral windows has a peripheral pixel neighboring to the target pixel. The SAD unit calculates absolute differences for each of the pixels corresponding to the target window and the peripheral window. The absolute differences are calculated by a difference calculation to obtain a difference analyzed value. The weighting unit receives each of the difference analyzed values and assigns multiple weights respectively to the peripheral pixels according to a data table.

Abstract: A motion detection method includes steps of receiving a previous frame and a current frame, calculating a pixel value difference of a target pixel between the previous frame and the current frame to determine a temporal pixel difference, calculating pixel value differences between the target pixel and surrounding pixels of the target pixel in the previous frame and the current frame, respectively, to determine a spatial pixel difference, and dividing the temporal pixel difference by the spatial pixel difference to determine a motion value of the target pixel.

Abstract: A video de-interlace apparatus and a method thereof are disclosed. The apparatus includes a combing detection apparatus and a de-interlace format determining apparatus. The combing detection apparatus receives a plurality of successive fields, performs combing detection to the fields, and outputs a combing detection result. The de-interlace format determining apparatus receives the combing detection result and compares the combing detection result with a plurality of models. When the combing detection result is conform to a specific model among the models, the de-interlace format determining apparatus determines a specific de-interlace format corresponding to the specific model to de-interlace the foregoing fields.

Abstract: A multi-source filter based on H.264 de-blocking includes the following units. A quantization parameter (qP) calculation unit receives an image data and calculates a qP. A boundary strength (bS) calculation unit receive the image data and calculates a bS. A block detector receives the image data and determines whether the image data falls in the block boundary. An image edge detector receives the image data and determines whether it is not belonged to an image edge region. An enabling unit receives the qP to determine whether to enable a de-blocking filtering operation. A determining unit filters the image data to output a new image data when determines that the image edge is not at the block boundary and the filtering operation is required.

Abstract: A video de-interlace apparatus and a method thereof are disclosed. The apparatus includes a combing detection apparatus and a de-interlace format determining apparatus. The combing detection apparatus receives a plurality of successive fields, performs combing detection to the fields, and outputs a combing detection result. The de-interlace format determining apparatus receives the combing detection result and compares the combing detection result with a plurality of models. When the combing detection result is conform to a specific model among the models, the de-interlace format determining apparatus determines a specific de-interlace format corresponding to the specific model to de-interlace the foregoing fields.