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Inter-prediction methods based on linear embedding for video compression
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DOI：10.1016/j.image.2015.07.011.png)
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Abstract
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This paper considers the problem of temporal prediction for inter-frame coding of video sequences using locally linear embedding (LLE). LLE-based prediction, first considered for intra-frame prediction, computes the predictor as a linear combination of K nearest neighbors (K-NN) searched within one or several reference frames. The paper explores different K-NN search strategies in the context of temporal prediction, leading to several temporal predictor variants. The proposed methods are tested as extra inter-frame prediction modes in an H.264 codec, but the proposed concepts are still valid in HEVC. The results show that significant rate-distortion performance gains are obtained with respect to H.264 (up to 15.31% bit-rate saving). (C) 2015 Elsevier B.V. All rights reserved.
Keywords:
Locally linear embedding
Temporal prediction
Video compression
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