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

Date

2014-12-10

Author

Tekeli, Nihat
Kamışlı, Fatih

Metadata

Show full item record

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

Item Usage Stats

285
views

0
downloads

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

Conference Name

IEEE Visual Communications and Image Processing Conference

Collections

Department of Electrical and Electronics Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Block-Based Spatial Prediction and Transforms Based on 2D Markov Processes for Image and Video Compression Kamışlı, Fatih (2015-04-01) Conventional intraframe 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 2D discrete cosine transform (DCT). Recently, it has been shown that transforming the intraprediction residuals with the odd type-3 discrete sine transform along the prediction direction and the DCT along the perpendicular directi...
Lossless Image and Intra-Frame Compression With Integer-to-Integer DST Kamışlı, Fatih (2019-02-01) Video coding standards are primarily designed for efficient lossy compression, but it is also desirable to support efficient lossless compression within video coding standards using small modifications to the lossy coding architecture. A simple approach is to skip transform and quantization, and simply entropy code the prediction residual. However, this approach is inefficient at compression. A more efficient and popular approach is to skip transform and quantization but also process the residual block in s...
Improvement of Transform-Skip Mode in Lossy Intra Coding with 3-Tap Filters Alvar, Saeed Ranjbar; Kamışlı, Fatih (2016-08-05) Using transforms in video coding is an effective method in reducing the spatial redundancy. However, for some cases applying transforms does not reduce the spatial redundancy. For these cases, transforms are skipped and the prediction error is directly quantized and then entropy coded. To further reduce the spatial redundancy in the transform skipped blocks, a pixel-by-pixel lossy intra prediction method based on a two dimensional correlation model is proposed in this paper. In the proposed method, three re...
LOSSLESS COMPRESSION IN HEVC WITH INTEGER-TO-INTEGER TRANSFORMS Kamışlı, Fatih (2016-09-23) Many approaches have been proposed to support lossless coding within video coding standards that are primarily designed for lossy coding. The simplest approach is to just skip transform and quantization and directly entropy code the prediction residual, which is used in HEVC version 1. However, this simple approach is inefficient for compression. More efficient approaches include processing the residual with DPCM prior to entropy coding. This paper explores an alternative approach based on processing the re...
Intra prediction with 3-tap filters for lossless and lossy video coding Ranjbar Alvar, Saeed; Kamışlı, Fatih; Department of Electrical and Electronics Engineering (2016) Video coders are primarily designed for lossy compression. The basic steps in modern lossy video compression are block-based spatial or temporal prediction, transformation of the prediction error block, quantization of the transform coefficients and entropy coding of the quantized coefficients together with other side information. In some cases, this lossy coding architecture may not be efficient for compression. For example, when lossless video compression is desirable, the transform and quantization steps...

Citation Formats

N. Tekeli and F. Kamışlı, “Intra-frame Coding with Recursive Intra Prediction and Adapted Block Transforms,” presented at the IEEE Visual Communications and Image Processing Conference, Valletta, MALTA, 2014, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/54764.