Content-adaptive mode-dependent filtering algorithm for H.264/advanced video coding intra prediction

Kibaek Kim; Gwanggil Jeon; Jechang Jeong

doi:10.1117/1.OE.51.11.117402

14 November 2012 Content-adaptive mode-dependent filtering algorithm for H.264/advanced video coding intra prediction

Kibaek Kim, Gwanggil Jeon, Jechang Jeong

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Optical Engineering, Vol. 51, Issue 11, 117402 (November 2012). https://doi.org/10.1117/1.OE.51.11.117402

Abstract

In H.264/advanced video coding (AVC), low-pass filtering is performed on neighboring coded pixels before intra prediction is applied to reduce the effect of quantization errors. However, reducing the effect of quantization errors by conventional methods is difficult in some areas, depending on the image characteristics. To alleviate this issue, we need to consider the prediction direction. We propose a mode-dependent filtering technique to reduce the effect of quantization errors. Our method has a threshold to adaptively choose between the conventional and proposed methods to reduce the number of flag bits that are sent to the decoder. The method is compared with other benchmark methods in terms of their average bit-saving and peak signal-to-noise ratio. Simulation results show that the average bit-rate reduction is about 1.222% in test sequences.

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Kibaek Kim, Gwanggil Jeon, and Jechang Jeong "Content-adaptive mode-dependent filtering algorithm for H.264/advanced video coding intra prediction," Optical Engineering 51(11), 117402 (14 November 2012). https://doi.org/10.1117/1.OE.51.11.117402

Published: 14 November 2012

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KEYWORDS

Linear filtering

Quantization

Video coding

Digital filtering

Optical engineering

Optical filters

Filtering (signal processing)

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