Patent application number | Description | Published |
20090016621 | MOVING-PICTURE CODING DEVICE AND MOVING-PICTURE CODING METHOD - A moving-picture coding device that performs inter-field motion compensation prediction, includes a reference limit area determining unit that determines to select, for each reference picture, with respect to reference pictures used for coding, a luminance or chrominance reference limit area putting a limit to a reference picture used for generating a prediction picture of a luminance or chrominance of a coding target block belonging to the coding target picture limit area of the case upon each reference picture being previously coded; a selecting inhibit vector determining unit that determines, in a case of coding the coding block belonging to the coding target picture limit area, a selecting inhibit vector that inhibits selecting a luminance and the chrominance are comprised only of pixels of the luminance reference limit area and the chrominance reference limit area. | 01-15-2009 |
20090028246 | MOVING-PICTURE CODING DEVICE AND MOVING-PICTURE CODING METHOD - A moving-picture coding device that divides a moving-picture signal comprised of a plurality of fields into a plurality of blocks and that can select coded area prediction in a current field and inter-field motion compensation prediction by block units, the moving-picture coding device comprises a forced intra block line determining unit, an intra selecting unit, a vector limit block line determining unit, a vector limit unit, a slice division unit a deblocking filter inhibit unit. | 01-29-2009 |
20090185623 | MOTION PICTURE ENCODING DEVICE AND MOTION PICTURE DECODING DEVICE - When a prediction is made between fields with different parity, the predicative efficiency of a chrominance vector is improved by adaptively switching the generation of a chrominance motion vector depending on a encoding/decoding field parity (top/bottom) and a reference field parity (top/bottom), and the coding efficiency is improved accordingly. | 07-23-2009 |
20090190663 | MOTION PICTURE ENCODING DEVICE AND MOTION PICTURE DECODING DEVICE - When a prediction is made between fields with different parity, the predicative efficiency of a chrominance vector is improved by adaptively switching the generation of a chrominance motion vector depending on a encoding/decoding field parity (top/bottom) and a reference field parity (top/bottom), and the coding efficiency is improved accordingly. | 07-30-2009 |
20090316051 | MOVING PICTURE DISTRIBUTION APPARATUS - To provide a moving picture distribution apparatus for realizing the distribution of moving pictures whose main contents cannot be viewed without viewing a CM, the moving picture distribution apparatus ( | 12-24-2009 |
20100054337 | VIDEO TRANSMITTING APPARATUS AND VIDEO TRANSMITTING METHOD - A video transmitting apparatus has a moving image encoding unit performing an encoding process using an intra-slice scheme; and a transmission monitoring unit detecting disconnection and recovery of a line between the moving image encoding unit and a video receiving apparatus. At a time of line disconnection, the moving image encoding unit performs an encoding process on a picture by putting reference restrictions on a motion vector so that a transmission error falls within a pixel macroblock line. | 03-04-2010 |
20100208816 | MOTION PICTURE ENCODING DEVICE AND MOTION PICTURE DECODING DEVICE - When a prediction is made between fields with different parity, the predicative efficiency of a chrominance vector is improved by adaptively switching the generation of a chrominance motion vector depending on a encoding/decoding field parity (top/bottom) and a reference field parity (top/bottom), and the coding efficiency is improved accordingly. | 08-19-2010 |
20100208823 | MOTION PICTURE ENCODING DEVICE AND MOTION PICTURE DECODING DEVICE - When a prediction is made between fields with different parity, the predicative efficiency of a chrominance vector is improved by adaptively switching the generation of a chrominance motion vector depending on a encoding/decoding field parity (top/bottom) and a reference field parity (top/bottom), and the coding efficiency is improved accordingly. | 08-19-2010 |
20100208824 | MOTION PICTURE ENCODING DEVICE AND MOTION PICTURE DECODING DEVICE - When a prediction is made between fields with different parity, the predicative efficiency of a chrominance vector is improved by adaptively switching the generation of a chrominance motion vector depending on a encoding/decoding field parity (top/bottom) and a reference field parity (top/bottom), and the coding efficiency is improved accordingly. | 08-19-2010 |
20100226433 | MOVING IMAGE CODING APPARATUS AND MOVING IMAGE CODING METHOD - A moving image coding apparatus is provided. The moving image coding apparatus includes a processing unit having an information amount control processor determining a quantization parameter in such a manner that while a lead-in of the set of the pictures is set as a reference, upon a position of the inter-coded picture being after a predetermined position corresponds to a first position at a predetermined cycle shorter than the number of pictures included in the set of the pictures, the number of coding bits allocated to the inter-coded picture is a value obtained by adding a first predetermined amount to a predetermined reference value, and upon the position of the inter-coded picture being after the predetermined position and also at a second position different from the first position, the number of coding bits is a value obtained by subtracting a second predetermined amount from the reference value. | 09-09-2010 |
20110164681 | MOTION PICTURE ENCODING DEVICE AND MOTION PICTURE DECODING DEVICE - When a prediction is made between fields with different parity, the predicative efficiency of a chrominance vector is improved by adaptively switching the generation of a chrominance motion vector depending on a encoding/decoding field parity (top/bottom) and a reference field parity (top/bottom), and the coding efficiency is improved accordingly. | 07-07-2011 |
20120263238 | VIDEO ENCODER AND VIDEO DECODER - A video encoder includes: a motion compensation picture signal generator to generate a plurality of motion compensation picture signals in accordance with an encoding target signal and a plurality of reference pictures; a prediction signal generator to generate a prediction signal of the encoding target signal by utilizing the plurality of motion compensation picture signals; a prediction error signal generator to generate a prediction error signal; a selector to select, from among a plurality of scan patterns prepared for generating encoded information from the prediction error signal, a scan pattern that is expected to minimize an information amount of an encoded state of the prediction error signal, in accordance with the plurality of motion compensation picture signals; and a zigzag scanner to generate encoded information from the prediction error signal by using the scan pattern selected by the selector. | 10-18-2012 |
20130010870 | VIDEO ENCODER AND VIDEO DECODER - A video encoder includes: a motion compensation picture signal generator that generates a plurality of motion compensation picture signals in accordance with an encoding target signal and a plurality of reference pictures; a prediction signal generator that generates a prediction signal of the encoding target signal using the motion compensation picture signals; a prediction error signal generator that generates a prediction error signal representing a difference between the encoding target signal and the prediction signal; a selector that selects an entropy code assignment rule that is expected to minimize an information amount of an encoded state of the prediction error signal from a plurality of entropy code assignment rules for encoding the prediction error signal in accordance with the motion compensation picture signals; and an entropy encoder that generates encoded information from the prediction error signal in accordance with the selected entropy code assignment rule. | 01-10-2013 |
20130011072 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - Whether a processing target block belongs to a quiescence area is determined based on a motion vector of an adjacent block whose encoding mode is determined to not be the intra-encoding mode and a reference index indicating a reference image of the adjacent block, whereby a reference index indicating a reference image of the processing target block is determined. If all the encoding modes of the adjacent blocks are the intra-encoding mode, an index number assigned to an image temporally closest and in a field different from a field to which the processing target block belongs is selected. If the processing target block belongs to a quiescence area, an index number assigned to an image temporally closest and in a same field as the processing target block is selected. If the processing target block belongs to a moving area, an index number of a reference image temporally closest is selected. | 01-10-2013 |
20130028323 | MOTION PICTURE CODING APPARATUS, MOTION PICTURE CODING METHOD AND COMPUTER READABLE INFORMATION RECORDING MEDIUM - A motion picture coding apparatus divides an image into plural blocks and codes the image; determines a coding mode to be used for each of the blocks; determines, for coefficients of each of the plural blocks coded in the determined coding mode, a position for which coefficients in the block are replaced by “0” based on rate information; determines whether a to-be-processed block is a first block for which referring to pixel values of an upward adjacent block is not allowed; changes, for coefficients of a block of DC components after orthogonal transformation or quantization in the block determined as the first block, the determined position to a position at which the number of coefficients to be replaced by “0” is reduced; and replaces coefficients of the block of DC components after orthogonal transformation or quantization in the block determined as the first block based on the changed position. | 01-31-2013 |
20130044808 | IMAGE ENCODING DEVICE AND IMAGE DECODING DEVICE - A encoding device includes a boundary pixel prediction value generation unit, boundary pixel prediction error estimation unit, and a quantized coefficient encoding unit. The boundary pixel prediction value generation unit generates a boundary pixel prediction value as a prediction value of a boundary pixel adjacent to an encoded block in the encoding block from a locally decoded image of a plurality of encoded blocks adjacent to the encoding block. The boundary pixel prediction error estimation unit generates boundary pixel prediction error estimation information from the boundary pixel prediction value and the encoding block prediction image with respect to the boundary pixel. The quantized coefficient encoding unit generates encoding block entropy encoded data from the quantized coefficients and the boundary pixel prediction error estimation information. | 02-21-2013 |
20130128981 | MOVING IMAGE DECODING APPARATUS, MOVING IMAGE DECODING METHOD AND MOVING IMAGE ENCODING APPARATUS, AND MOVING IMAGE ENCODING METHOD - A moving image decoding apparatus includes a region boundary position information extracting unit which extracts region boundary position information between a clean region including at least one block encoded such that a pixel value is guaranteed to be decoded correctly, and a non-clean region, a region classification unit which specifies the clean region and the non-clean region in each picture based on the region boundary position information, a referenceability determining unit which, when a decoding target block belongs to the clean region, determines that blocks in the clean region in the decoding target picture and blocks in the clean region in the reference picture are referenceable, and, when the decoding target block belongs to the non-clean region, determines that all of blocks of the decoding target picture and the reference picture are referenceable, and a decoding unit which decodes the decoding target block with reference to only the referenceable blocks. | 05-23-2013 |
20130156107 | ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD, AND DECODING METHOD - An encoding device includes a determination unit configured to determine, when performing detection of a motion vector using the decoded image of a frame image encoded in increments of blocks prior to the frame image to be encoded regarding an encoded block to be encoded of a plurality of blocks included in this frame image to be encoded at the time of encoding a frame image included in a moving image where a first image and a second image are arrayed using inter-image prediction encoding processing, correlation height as to the image of the encoded block regarding each of the image of a first area corresponding to the first image and the image of a second area corresponding to the second image included in a boundary block straddling a boundary between the first image and the second image of a block included in the decoded image. | 06-20-2013 |
20130208793 | MOTION VIDEO ENCODING APPARATUS, MOTION VIDEO ENCODING METHOD, AND MOTION VIDEO ENCODING COMPUTER PROGRAM - A motion video encoding apparatus includes: a group determining unit which determines to which of a plurality of groups each block belongs; a group decode time information computing unit which computes a decode time for each of the groups; a group information appending unit which appends group information identifying the group to which each block belongs to data to be output; a code amount control unit which controls an amount of code for each block contained in the group so that data needed for decoding all the blocks contained in the group will arrive at a stream receive buffer provided in a motion video decoding apparatus by the decode time of the group when the data is transmitted to the motion video decoding apparatus at a prescribed transmission rate; and an encode processing unit which encodes each block, based on control information concerning the amount of code. | 08-15-2013 |
20130215961 | MOTION VIDEO ENCODING APPARATUS, MOTION VIDEO ENCODING METHOD, MOTION VIDEO ENCODING COMPUTER PROGRAM, MOTION VIDEO DECODING APPARATUS, MOTION VIDEO DECODING METHOD, AND MOTION VIDEO DECODING COMPUTER PROGRAM - A motion video encoding apparatus includes: a prediction error image generating unit which computes a difference between a block being encoded and a predicted image for the block being encoded and thereby generates a prediction error image; a prediction error orthogonal-transforming unit which computes a plurality of first frequency coefficients by orthogonal-transforming the prediction error image; a predicted image orthogonal-transforming unit which computes a plurality of second frequency coefficients by orthogonal-transforming the predicted image; a sign judging unit which judges the positive/negative sign of each one of the plurality of second frequency coefficients; and an adaptive encoding unit which encodes each given one of the plurality of first frequency coefficients by using sign match/mismatch information that indicates a match or mismatch between the sign of the given first frequency coefficient and the sign of a corresponding one of the plurality of second frequency coefficients. | 08-22-2013 |
20130215966 | IMAGE ENCODING METHOD, IMAGE DECODING METHOD, IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE - A method including acquiring decode information of a decoded block in a decode target image from a storage unit; selecting an decoded image such that the decode target image is situated between the decoded image and a reference image of the decoded image; acquiring, from the storage unit, decode information of a predetermined block in the selected decoded image; predicting a reference mode indicating a prediction direction of a decode target block that refers to decoded images in plural directions, by using the acquired decode information of the decoded block and decode information of the predetermined block; decoding reference mode information for determining the reference mode of the decode target block from encode data; and determining the reference mode of the decode target block from the predicted reference mode and the decoded reference mode information. | 08-22-2013 |
20130223526 | IMAGE DECODING METHOD, IMAGE CODING METHOD, IMAGE DECODING DEVICE, IMAGE CODING DEVICE, AND RECORDING MEDIUM - A method for decoding an image divided into plural blocks includes acquiring decoding information of a decoded block in a decoding target image from a storage unit that stores the decoding information of the decoded block and decoding information of blocks in plural decoded images; selecting a decoded image from the plural decoded images; acquiring decoding information of a corresponding block in the selected decoded image from the storage unit; predicting a division mode, which indicates a division shape of a decoding target block, by using the acquired decoding information of the decoded block and the acquired decoding information of the corresponding block; decoding division mode information, which indicates the division mode of the decoding target block based on coded data, and determining the division mode of the decoding target block based on the predicted division mode and the decoded division mode information. | 08-29-2013 |
20130294502 | MOTION VIDEO ENCODING APPARATUS, MOTION VIDEO ENCODING METHOD, AND MOTION VIDEO ENCODING COMPUTER PROGRAM - A motion video encoding apparatus includes: a group determining unit which determines, for each block, a group to which the block belongs; a group decode time information computing unit which computes a decode time for each group; a code amount control unit which controls, for each group, an amount of code resulting from entropy encoding each block in the group so that data needed for decoding all of the blocks in the group arrives at a stream receive buffer by a decode time of the group when the data is transmitted at a prescribed transmission rate; a compression unit which compresses the data of each block based on the amount of code of the block; an entropy encoding unit which entropy-encodes the compressed data of each block; and a decode information appending unit which appends, to data to be output, correction information for the decode time of each group. | 11-07-2013 |
20130322540 | MOVING IMAGE DECODING METHOD, MOVING IMAGE ENCODING METHOD, AND MOVING IMAGE DECODING APPARATUS - A moving image decoding method for decoding encoded data of an image partitioned into a plurality of blocks includes determining a predicted motion vector corresponding to a motion vector of a block to be decoded by using motion vector information, the motion vector information including a motion vector of an already-decoded block and reference destination information designating a reference destination of the motion vector of the already-decoded block; controlling a decoding process of the motion vector of the block to be decoded using the predicted motion vector depending on whether the reference destination information designating the reference destination of the motion vector designates an inter-view reference image; and decoding the motion vector of the block to be decoded with the controlled decoding process. | 12-05-2013 |
20130343458 | DEVICE AND METHOD FOR MOVING IMAGE ENCODING - A moving image encoding device includes a processor; and a memory which stores a plurality of instructions, which when executed by the processor, cause the processor to execute, obtaining a region motion vector that represents a motion of a region including a block in a first slice, in a case where an encoding object block is included in a block line in a second slice, the block line contacting with a boundary between the first slice and the second slice in an encoding object picture, the encoding object picture being divided into a plurality of slices each of which includes a plurality of blocks; obtaining a motion vector of the encoding object block by using the region motion vector as a first prediction vector of the encoding object block; obtaining a second prediction vector from a motion vector of one or more encoded blocks; and obtaining an encoding result. | 12-26-2013 |
20140211845 | MOVING IMAGE ENCODING APPARATUS - A moving image encoding apparatus configured to use an image one frame before a target image for encoding to calculate a filtering coefficient for each intra prediction mode of a decoded image from the decoded image and the original image, extracts a filtering coefficient to perform a filtering process to a reference pixel for intra prediction mode determination of a peripheral block of the target block for encoding according to the intra prediction mode of the peripheral block and to generate a reference image for intra prediction mode determination, uses the reference image for intra prediction mode determination to select an intra prediction mode for the target block for encoding, and generates an intra prediction image of the target block for encoding. | 07-31-2014 |
20140211851 | VIDEO ENCODER AND VIDEO ENCODING METHOD AS WELL AS VIDEO DECODER AND VIDEO DECODING METHOD - A video encoder includes: a predictive vector selecting unit that selects candidates for a first predictive vector for predicting a motion vector in a first direction, and candidates for a second predictive vector for predicting a motion vector for a second direction; a selection information setting unit that sets first selection information for identifying the first predictive vector from among the first predictive vector candidates, and second selection information for identifying the second predictive vector from among the second predictive vector candidates; and a variable length coding unit that performs variable length coding on the first and second selection information. The video encoder applies predetermined code to the second selection information indicating that the second predictive vector candidate obtained from a motion vector in the second direction, for an encoded block corresponding to the first predictive vector is the second predictive vector. | 07-31-2014 |
20140286422 | VIDEO CODING APPARATUS AND METHOD - A video coding apparatus includes a processor that executes a procedure. The procedure includes: (c) classifying each of a plurality of groups into either a full evaluation group or into a partial evaluation group; (d) determining the prediction mode to use as generating the predicted image of a coding target block by evaluating coding costs of all the prediction modes belonging to each of the groups for a group classified at (c) into the full evaluation group, and evaluating coding costs of a portion of prediction modes out of the prediction modes belonging to each of the groups for a group classified at (c) into the partial evaluation group; and (e) generating a predicted image of the coding target block using the prediction mode determined at (d). | 09-25-2014 |
20140369418 | MOTION PICTURE ENCODING DEVICE AND MOTION PICTURE DECODING DEVICE - When a prediction is made between fields with different parity, the predicative efficiency of a chrominance vector is improved by adaptively switching the generation of a chrominance motion vector depending on encoding/decoding field parity (top/bottom) and a reference field parity (top/bottom), and the coding efficiency is improved accordingly. | 12-18-2014 |