Patent application number | Description | Published |
20090096645 | METHOD AND APPARATUS FOR ENTROPY CODING AND DECODING - This apparatus includes a generator which generates a reference matrix having a correlation with an information matrix to be coded from the information matrix. A classifier classifies matrix components around the ith row component of the reference matrix, and generates a set of matrix components equal in distance from the ith row component. A calculator forms a context tree including a plurality of internal nodes corresponding to the matrix components of the set, and a plurality of branches and a plurality of leaf nodes which have one-to-one correspondence with the symbols of the components, associates a sequence of the symbols with a path extending from the leaf node to the root node of the context tree, and calculates the coding probability of the ith row/jth column component of the information matrix. A coder arithmetically codes the ith row/jth column component of the information matrix in accordance with the coding probability. | 04-16-2009 |
20100118945 | METHOD AND APPARATUS FOR VIDEO ENCODING AND DECODING - An video encoding apparatus includes a dividing unit | 05-13-2010 |
20100303149 | VIDEO ENCODING/DECODING APPARATUS - An image processor to produce a local decoded image corresponding to an input image, a region partitioning module to classify the local decoded image into a plurality of regions using a given parameter, a filter designing module to design a filter coefficient for every classified region, a filter processor to filter the local decoded image according to a corresponding filter coefficient for every classified region, a frame memory to store a filtered image, a predictor to produce a prediction image using a stored image, and an encoder to output a parameter used for classification of the region and information of a filter coefficient every classified region as encoded data are provided. | 12-02-2010 |
20100329335 | VIDEO ENCODING AND DECODING APPARATUS - According to one embodiment, a video encoding apparatus includes a setting module to set a filter coefficient for use in filtering in a video decoding apparatus, and to set a rounding offset for controlling rounding of operation in the filtering, and an encoder to output the filter coefficient and information of the rounding offset as encoded data. | 12-30-2010 |
20110026595 | VIDEO ENCODING/DECODING APPARATUS - According to one embodiment, an image encoding apparatus performs encoding according to coefficient information whose probability distribution differs due to a prediction method. The image encoding apparatus includes a plurality of probability estimators provided for a plurality of prediction directions of intra-picture prediction and configured to estimate occurrence probabilities of coefficient information respectively, a switch to select a probability estimator according to information of a prediction direction used for intra-picture prediction, and a variable length encoder to encode coefficient information according to occurrence probability of coefficient information provided from a probability estimator selected by the switch. | 02-03-2011 |
20110069752 | MOVING IMAGE ENCODING/DECODING METHOD AND APPARATUS WITH FILTERING FUNCTION CONSIDERING EDGES - According to one embodiment, a moving image encoding method is disclosed. The method can generate a prediction error image based on a difference between an input moving image and a predicted image. The method can execute transform and quantization on the prediction error image to generate quantized transformation coefficients. The method can generate edge information which indicates an attribute of an edge in a local decoded image corresponding to an encoded image. The method can generate, based on the edge information, control information associated with application of a filter to a decoded image at a decoding side. The method can set filter coefficients for the filter based on the control information. In addition, the method can encode the quantized transformation coefficients and filter coefficient information indicating the filter coefficients to output encoded data. | 03-24-2011 |
20110075732 | APPARATUS AND METHOD FOR ENCODING AND DECODING MOVING IMAGES - According to an embodiment, a moving image encoding method includes generating a predicted image of an original image based on a reference image, performing transform and quantization on a prediction error between the original image and the predicted image to obtain a quantized transform coefficient, performing inverse quantization and inverse transform on the quantized transform coefficient to obtain a decoded prediction error, adding the predicted image and the decoded prediction error to generate a local decoded image, setting filter data containing time-space filter coefficients for reconstructing the original image based on the local decoded image and the reference image, performing a time-space filtering process on the local decoded image in accordance with the filter data to generate a reconstructed image, storing the reconstructed image as the reference image, and encoding the filter data and the quantized transform coefficient. | 03-31-2011 |
20110150080 | MOVING-PICTURE ENCODING/DECODING METHOD AND APPARATUS - In one embodiment, a moving-picture decoding apparatus is disclosed. A decoding unit decodes input coded data to generate a quantized transform coefficient and filter information. An inverse-transform/inverse-quantization unit executes inverse-quantization and inverse-transform on the quantized transform coefficient to generate a prediction error picture. A decoded-picture generation unit generates a decoded picture using the prediction error picture and a predicted picture. A luminance filter processing unit applies a luminance filter to the luminance signal of the decoded picture based on luminance filter information to generate the luminance signal of a restored picture. A chrominance filter processing unit applies a chrominance filter to the chrominance signal of the decoded picture based on chrominance filter information to generate the chrominance signal of the restored picture. | 06-23-2011 |
20110228844 | MOVING PICTURE ENCODING METHOD AND MOVING PICTURE DECODING METHOD - According to one embodiment, a moving picture encoding method includes deriving a target filter to be used for a decoded image of a target image to be encoded. The method includes setting a correspondence relationship between target filter coefficient in the target filter and reference filter coefficient in a reference filter in accordance with tap length of the target filter and tap length of the reference filter. The method includes deriving coefficient difference between the target filter coefficient and the reference filter coefficient in accordance with the correspondence relationship. The method includes encoding target filter information including the tap length of the target filter and the coefficient difference. | 09-22-2011 |
20120128073 | VIDEO ENCODING APPARATUS AND A VIDEO DECODING APPARATUS - According to one embodiment, a video encoding apparatus is a video encoding apparatus for subjecting a video image to motion compensated prediction coding, includes an acquisition module to acquire available blocks of blocks having motion vectors from encoded blocks adjacent to a to-be-encoded block and number of the available blocks, an acquisition/selection module to select one selection block from the encoded available blocks, a selection information encoder to encode selection information specifying the selection block using a code table corresponding to the number of available blocks, and an image encoder to subject the to-be-encoded block to motion compensated prediction coding using a motion vector of the selection block. | 05-24-2012 |
20130022109 | VIDEO ENCODING METHOD, DECODING METHOD, AND APPARATUS - According to one embodiment, a method can generate an interpolation image signal including the integer-pixel and interpolation pixel values, based on, if the interpolation pixel is not located at the integer-pixel position and in a row of an integer-pixel, and the interpolation pixel is located at a first pixel position displaced from the integer-pixel in horizontal and vertical directions by a half pixel, applying a first filter, and if the interpolation pixel is located at a second pixel position displaced from the integer-pixel in the directions by a quarter pixel, applying a second filter, and if the interpolation pixel is not located at the first and second pixel positions, applying the second and first filters. | 01-24-2013 |
20130182763 | VIDEO ENCODING APPARATUS, DECODING APPARATUS AND VIDEO ENCODING METHOD - According to one embodiment, a video encoding apparatus includes a controller, a loop filter processor, a interpolation filter, a generator, a transform unit, a quantizer, an encoder. The interpolation filter processor directly calculates, if motion compensation prediction of quarter pixel precision is performed, a sub-pixel value of a sub-pixel displaced from an integer-pixel by a quarter pixel in a horizontal direction or a vertical direction based on integer-pixel values of a reproduction image signal, and to generate a reference image including a integer-pixel and a sub-pixel. | 07-18-2013 |
20140177727 | VIDEO ENCODING APPARATUS AND VIDEO DECODING APPARATUS - A video encoding apparatus is a video encoding apparatus for subjecting a video image to motion compensated prediction coding, comprising an acquisition module to acquire available blocks of blocks having motion vectors from encoded blocks adjacent to a to-be-encoded block and number of the available blocks, an acquisition/selection module to select one selection block from the encoded available blocks, a selection information encoder to encode selection information specifying the selection block using a code table corresponding to the number of available blocks, and an image encoder to subject the to-be-encoded block to motion compensated prediction coding using a motion vector of the selection block. | 06-26-2014 |
20140185683 | VIDEO ENCODING APPARATUS AND A VIDEO DECODING APPARATUS - A video encoding apparatus is a video encoding apparatus for subjecting a video image to motion compensated prediction coding, comprising an acquisition module to acquire available blocks of blocks having motion vectors from encoded blocks adjacent to a to-be-encoded block and number of the available blocks, an acquisition/selection module to select one selection block from the encoded available blocks, a selection information encoder to encode selection information specifying the selection block using a code table corresponding to the number of available blocks, and an image encoder to subject the to-be-encoded block to motion compensated prediction coding using a motion vector of the selection block. | 07-03-2014 |
20140185684 | VIDEO ENCODING APPARATUS AND VIDEO DECODING APPARATUS - A video encoding apparatus is a video encoding apparatus for subjecting a video image to motion compensated prediction coding, comprising an acquisition module to acquire available blocks of blocks having motion vectors from encoded blocks adjacent to a to-be-encoded block and number of the available blocks, an acquisition/selection module to select one selection block from the encoded available blocks, a selection information encoder to encode selection information specifying the selection block using a code table corresponding to the number of available blocks, and an image encoder to subject the to-be-encoded block to motion compensated prediction coding using a motion vector of the selection block. | 07-03-2014 |
20140185685 | VIDEO ENCODING APPARATUS AND A VIDEO DECODING APPARATUS - A video encoding apparatus is a video encoding apparatus for subjecting a video image to motion compensated prediction coding, comprising an acquisition module to acquire available blocks of blocks having motion vectors from encoded blocks adjacent to a to-be-encoded block and number of the available blocks, an acquisition/selection module to select one selection block from the encoded available blocks, a selection information encoder to encode selection information specifying the selection block using a code table corresponding to the number of available blocks, and an image encoder to subject the to-be-encoded block to motion compensated prediction coding using a motion vector of the selection block. | 07-03-2014 |
20140192888 | VIDEO ENCODING APPARATUS AND VIDEO DECODING APPARATUS - A video encoding apparatus is a video encoding apparatus for subjecting a video image to motion compensated prediction coding, comprising an acquisition module to acquire available blocks of blocks having motion vectors from encoded blocks adjacent to a to-be-encoded block and number of the available blocks, an acquisition/selection module to select one selection block from the encoded available blocks, a selection information encoder to encode selection information specifying the selection block using a code table corresponding to the number of available blocks, and an image encoder to subject the to-be-encoded block to motion compensated prediction coding using a motion vector of the selection block. | 07-10-2014 |