Patent AU-2019210523-B2 (AU)
Title: Predictive encoding method, predictive encoding device, and predictive encoding program of motion vector, and, predictive decoding method, predictive decoding device, and predictive decoding program of motion vector
Inventor: FUJIBAYASHI AKIRA
IPC: H04N19/52
Filed: 2019-07-30
Granted: 2020-12-10
Abstract: PREDICTIVE ENCODING METHOD, PREDICTIVE ENCODING DEVICE, AND 
PREDICTIVE ENCODING PROGRAM OF MOTION VECTOR, AND, PREDICTIVE 
DECODING METHOD, PREDICTIVE DECODING DEVICE, AND PREDICTIVE 
DECODING PROGRAM OF MOTION VECTOR 
ABSTRACT 
Amethod for predictively encoding amotionvectorused in motion compensated prediction ofa video sequence 
consisting of a temporal sequence of frame pictures, comprising: a step of determining a motion vector of a 
target partition (BT) in a frame picture of an encoding target in the video sequence; a step of determining a first 
motion vector predictor candidate that satisfies a predetermined criterion used in determination ofmotionvector 
predictor candidates, the first motion vector predictor candidate determined from a motion vector or motion 
vectors of more partitions belonging to a left-neighboring region located on the left side of the target partition 
(BT); a step of determining a second motion vector predictor candidate that satisfies a predetermined criterion 
used for determination of motion vector predictor candidates, the second motion vector predictor candidate 
determined from a motion vector or motion vectors of more partitions belonging to an above-neighboring 
region located above the target partition (BT); a step of selecting an optimum motion vector predictor and 
outputting motion vector predictor indication information to specify the selected optimum motion vector 
predictor, wherein the optimum motion vector predictor is selected based on comparison between one or more 
motion vector predictor candidates including the first motion vector predictor candidate and the second motion 
vector predictor candidate, and the motion vector ofthe target partition (BT); and a step of encoding the motion 
vector predictor indication information, wherein the left-neighboring region includes a neighboring partition 
located below and on the left side (BD) of the target partition (BT), wherein the above-neighboring region 
includes a neighboring partition located above and on the right side (BRA) ofthe target partition (BT), wherein 
the above-neighboring region includes a neighboring partition located above and on the left side (BE) of the 
target partition (BT), wherein the step of determining the first motion vector predictor candidate comprises 
scanning more partitions included in the left-neighboring region, in an upward direction from a bottom of the 
left-neighboring region, and thereby determining, as the first motion vector predictor candidate, a motion vector 
satisfying the predetermined criterion used for determination of motion vector predictor candidates, from the 
motion vector or motion vectors of the more partitions belonging to the left-neighboring region, and wherein 
the step of determining the second motion vector predictor candidate comprises scanning more partitions 
included in the above-neighboring region, in a direction from right to left, and thereby determining, as the 
second motion vector predictor candidate, a motion vector satisfying the predetermined criterion used for 
determination of motion vector predictor candidate, from the motion vector or motion vectors of the more 
partitions belonging to the above-neighboring region.