Study on a Motion Vector Prediction Method Using Weighted Reference Vectors

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  • 動画像符号化における動きベクトル予測に関する検討
  • ドウガゾウ フゴウカ ニ オケル ウゴキ ベクトル ヨソク ニ カンスル ケントウ

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This paper presents a motion vector (MV) prediction method for efficient video coding. In the state-of-the-art video coding standard, H.264/MPEG-4 AVC, the predicted MV of the current macro block (MB) is calculated from neighboring MVs in previously determined MBs. Then, residual between the predicted and the accurate (block-matched) MVs is encoded. However, the residual would increase when the correlations among neighboring MVs are low. This paper discusses a new motion vector prediction method that eliminates unreliable reference MVs in neighboring MBs and calculates a predicted MV using adaptively weighted reliable reference MVs. The experimental result shows the capability to improve the coding performance.

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