Prediction image generation device, moving image decoding device, and moving image coding device
AssigneeGuangdong Oppo Mobile Telecommunications Corp., Ltd.
InventorTomohiro Ikai
Life of this patent
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Abstract
Coding efficiency is improved. A motion compensation filter unit acts on a motion vector applied image obtained by acting a motion vector on a reference image. The motion compensation filter unit causes filter coefficients mcFilter[i][k] designated by a phase i and a filter coefficient position k to act on the motion vector applied image. The filter coefficients mcFilter[i][k] includes filter coefficients calculated by using filter coefficients mcFilter[p][k] (p≠i) and filter coefficients mcFilter[q][k] (q≠i).
Claims3
A prediction image generation device for generating a prediction image, the prediction image generation device comprising:
- an inter-prediction parameter decoding control circuitry that derives a modified difference motion vector by using a motion vector difference value and that decodes a flag, from a coded data, specifying an accuracy of a motion vector, in a case that the motion vector difference value is not equal to zero;
- and
- a prediction image generation circuitry that generates a prediction image by using a motion vector based on the modified difference motion vector,
- wherein
- the inter-prediction parameter decoding control circuitry determines a shift value used for a modifying process of the motion vector difference value by using the flag.
Dependencies are inferred from the claim text.