Intra-frame Coding with Recursive Intra Prediction and Adapted Block Transforms

Date

2014-12-10

Author

Tekeli, Nihat
Kamışlı, Fatih

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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Conventional intra-frame coding is performed in two steps. First, a block of pixels are predicted by copying previously reconstructed neighbor pixels of the block along an angular direction inside the block. Then, the prediction residual block is transform-coded with the well-known 2-D Discrete Cosine Transform (DCT). Recently, it has been shown that transforming the intra prediction residuals with the odd type-3 Discrete Sine Transform (ODST-3) along the prediction direction and the DCT along the perpendicular direction improves the compression performance. More recently, a recursive prediction approach has been proposed for intra prediction. In this paper, we show that combining the recursive intra prediction approach and the ODST-3/DCT transform improves overall intra-frame compression performance relative to using only one of these methods. We also show that this performance can be improved further by developing transforms specifically adapted to the prediction residuals of the recursive intra prediction approach.

Subject Keywords

Video coding, Discrete cosine transforms, Intra prediction, Markov processes

URI

https://hdl.handle.net/11511/54764

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Department of Electrical and Electronics Engineering, Conference / Seminar