Moving picture encoding apparatus, moving picture decoding apparatus, moving picture encoding method, moving picture decoding method, moving picture encoding program, and moving picture decoding program

摘要

A moving picture encoding apparatus for dividing a frame image as a coding target in a moving picture signal into plural target regions, detecting motion vectors for the respective target regions, and thereby performing coding based on motion compensation. The moving picture encoding apparatus comprises motion vector prediction means for performing a correction of scaling the motion vector of an adjacent region adjacent to the target region on the basis of the target reference frame image. The motion vector predicting means also performing a determination of an optimum predicted motion vector based on the motion vector of the adjacent region adjacent to the target region and thereby predicting the optimum predicted motion vector after the correction.

主权项

1. A moving picture encoding apparatus for dividing a frame image as an encoding target in a moving picture signal consisting of a temporal series of frame image signals, into a plurality of target regions, detecting motion vectors for the respective target regions with reference to a plurality of frame images different from the frame image as the encoding target, and thereby performing encoding based on motion compensation, the moving picture encoding apparatus comprising:
circuitry configured to
select one predicted motion vector from among motion vectors of adjacent regions adjacent to a target region;determine whether the selected predicted motion vector meets predetermined criteria including a criterion that the selected predicted motion vector corresponds to a same reference frame image as a target reference frame image used for detection of the motion vector of the target region; andafter selecting the one predicted motion vector, correct a scale of the selected predicted motion vector based on the target reference frame image when the selected predicted motion vector does not meet the criteria based on a temporal relation among an adjacent reference frame image referred for detecting a motion vector of the adjacent region, the target reference frame image, and a target frame image being the frame image as the encoding target, or based on time information thereof, wherein at least two of the adjacent regions adjacent to the target region refer respectively to two different reference frame images for detecting the motion vectors of the adjacent regions.