Intra prediction using weighted average of pixel values according to prediction direction

Kibaek Kim, Dongjin Jung, Jinik Jang, Jechang Jeong

Research output: Contribution to journalArticle

Abstract

In this paper, we proposed a method to reduce quantization error. In order to reduce quantization error, low pass filtering is applied on neighboring samples of current block in H.264/AVC. However, it has a weak point that low pass filtering is performed regardless of prediction direction. Since it doesn't consider prediction direction, it may not reduce quantization error effectively. Proposed method considers prediction direction for low pass filtering and uses a threshold condition for reducing flag bit. We compare our experimental result with conventional method in H.264/AVC and we can achieve the average bit-rate reduction of 1.534% by applying the proposed method. Bit-rate reduction between 0.580% and 3.567% are shown for experimental results.

Original languageEnglish
Pages (from-to)380-383
Number of pages4
JournalWorld Academy of Science, Engineering and Technology
Volume79
Publication statusPublished - 2011 Jul 1

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Keywords

  • Coding efficiency
  • H.264/AVC
  • Intra prediction
  • Low pass filter

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