11 results about "Motion vector" patented technology

A plurality of motion vector candidates is extracted, which includes motion vectors of a first set of blocks and a second set of blocks each adjacent to an object block. The first set of blocks has the same size as the object block. The second set of blocks has a smaller size than the object block. A first predicted motion vector of the object block is selected from the plurality of motion vector candidates. A residual cost of each neighboring motion vector is calculated. Each neighboring motion vector points a point within a predetermined range from a point pointed by the first predicted motion vector. A second predicted motion vector having the minimum residual cost is selected from the plurality of neighboring motion vectors. If the first predicted motion vector is equal to the second predicted motion vector, the first predicted motion vector is set as the motion vector of the object block. If the first predicted motion vector is not equal to the second predicted motion vector, a search region pointed by the first predicted motion vector is searched by block matching.

A decoding section generates a decoded image and a coding parameter set from a first video coded video sequence. A coding parameter set conversion section first sets the coding structure for a pair of upper and lower macro blocks based on the coding structures of the corresponding macro blocks and converts the remaining parameters such as a motion vector based on the coding structure. A coding parameter set generation section generates coding parameters of an intraframe coding parameter, etc., a coding parameter set selection section selects an optimum parameter set, and a coding section performs recoding processing.

A method for calculating a direct mode motion vector for a bi-directionally predictive-picture includes: calculating S based on TRB, TRD, and N; calculating Tx based on MVx, the S, and the N; calculating Ty based on MVy, the S, and the N; obtaining a sum of the Tx, MVDx and δ1x, and using the obtained sum as MVFx; obtaining a sum of the Ty, MVDy and δ1y, and using the obtained sum as MVFy; obtaining a sum of the MVFx, δ2x, and a minus value of the MVx, and using the obtained sum as MVBx; and, obtaining a sum of the MVFy, δ2y, and minus value of the MVy, and using the obtained sum as MVBy.

An imaging apparatus includes: an imaging unit that captures an image by photoelectrically converting a subject image; a feature calculating unit that calculates, per region included in the image, a feature value related to suitability for motion detection; a region-motion detecting unit that detects a motion vector per the region; and a whole-motion calculating unit that calculates a motion quantity of a whole image from the feature value and the motion vector.

The invention discloses a motion compensation reference block data reading device and a motion compensation reference block data reading method for embedded video decoding. The device and the method are used for reading the reference block data of a current decoding macro block from an off-chip reference frame buffer into an on-chip memory space in the embedded video decoding. In the device and the method, inter-frame macro blocks are classified according to types and motion vectors of the macro blocks, different reference block data ranges are determined respectively, and the reference block data is read into the on-chip memory space once. Simultaneously, boundary extension is performed on data out of a reference frame range, so the reference block data is not required to be judged whether to exceed a reference frame boundary or not in subsequent sub-pixel interpolation. By the device and the method, on-chip and off-chip data interaction times can be remarkably decreased, the overlapped part of data of adjacent 4*4 reference blocks can be reduced, and an on-chip and off-chip interactive data volume can be decreased.

The present disclosure relates to a method and apparatus for improving the encoding efficiency by adaptively changing the resolution of the motion vector in the inter prediction encoding and inter prediction decoding of a video. The apparatus includes: a predicted motion vector calculator for calculating a predicted motion vector of a current block to be encoded using motion vectors of one or more surrounding blocks; and a skip mode encoder for encoding a result of performing a prediction of the current block and information indicating that the current block is a skip block when the predicted motion vector satisfies a skip condition, wherein at least one motion vector among the motion vectors of the surrounding blocks and the motion vector of the current block has a resolution different from resolutions of the other motion vectors.

A video processing method and device, and a storage medium, the method comprising: acquiring an initial motion information candidate list of an image block of a current frame; according to an ultimatemotion vector expression MMVD method, obtaining a target motion information candidate list based on the initial motion information candidate list; when the target motion information candidate list comprises the double-motion information, determining whether the double-motion information meets a first preset condition or not based on the precision of a motion vector included in the double-motion information; if the double-motion information meets a first preset condition, correcting the double-motion information according to a decoding end motion vector correction DMVR method to obtain corrected double-motion information; and encoding or decoding the image block based on the corrected dual motion information. Through the implementation mode, the MMVD technology and the DMVR technology arefused, the coding performance is improved, and the coding and decoding efficiency is effectively improved.