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Block-Adaptive Selection of Recursive and Non-Recursive Type Intra Prediction Modes for Image Coding
Yuta ISHIDA Yusuke KAMEDA Tomokazu ISHIKAWA Ichiro MATSUDA Susumu ITOH
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2018/06/01
Online ISSN: 1745-1337
Type of Manuscript: LETTER
still image coding, recursive type intra prediction, non-recursive type intra prediction, prediction mode,
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This paper proposes a lossy image coding method for still images. In this method, recursive and non-recursive type intra prediction techniques are adaptively selected on a block-by-block basis. The recursive-type intra prediction technique applies a linear predictor to each pel within a prediction block in a recursive manner, and thus typically produces smooth image values. In this paper, the non-recursive type intra prediction technique is extended from the angular prediction technique adopted in the H.265/HEVC video coding standard to enable interpolative prediction to the maximum possible extent. The experimental results indicate that the proposed method achieves better coding performance than the conventional method that only uses the recursive-type prediction technique.