Variable block-based deblocking filter for H.264/AVC on low-end and low-bit rates terminals / Seung-Ho Shin in Signal processing. Image communication, Vol. 25 N° 4 (Avril 2010)  

Public ISBD [article]  inSignal processing. Image communication > Vol. 25 N° 4 (Avril 2010) . - pp. 255–267 Titre : Variable block-based deblocking filter for H.264/AVC on low-end and low-bit rates terminals Type de document : texte imprimé Auteurs : Seung-Ho Shin, Auteur ; Kyu-Ho Park, Auteur ; Young-Joon Chai, Auteur Année de publication : 2012 Article en page(s) : pp. 255–267 Note générale : Electronique Langues : Anglais (eng) Mots-clés : H.264 AVC Deblocking filter Motion compensation Variable blocks Résumé : H.264/AVC supports variable block motion compensation, multiple reference frames, 1/4-pixel motion vector accuracy, and in-loop deblocking filter, compared with previous video coding standards. While these coding techniques are major functions for video compression improvement, they lead to high computational complexity at the same time. For the H.264 video coding techniques to be actually applied on low-end/low-bit rates terminals more extensively, it is essential to improve the coding efficiency. Currently the H.264 deblocking filter, which can improve the subjective quality of video, is hardly used on low-end terminals due to computational complexity. In this paper, we propose an enhanced method of deblocking filter that efficiently reduces the blocking artifacts occurring during the low-bit rates video coding. In the ‘variable block-based deblocking filter (VBDF)’ proposed in this paper, the temporal and spatial characteristics of moving pictures are extracted using the variable block-size information of motion compensation, the filter mode is classified into four different modes according to the moving-picture characteristics, and the adaptive filtering is executed in the separate modes. The proposed VBDF can reduce the blocking artifacts, prevent excessive blurring effects, and achieve about 30–40% computational speedup at about the same PSNR compared with the existing methods. ISSN : 0923-5965 En ligne : http://www.sciencedirect.com/science/article/pii/S0923596510000068 [article] Variable block-based deblocking filter for H.264/AVC on low-end and low-bit rates terminals [texte imprimé] / Seung-Ho Shin, Auteur ; Kyu-Ho Park, Auteur ; Young-Joon Chai, Auteur . - 2012 . - pp. 255–267. Electronique Langues : Anglais (eng) in Signal processing. Image communication > Vol. 25 N° 4 (Avril 2010) . - pp. 255–267 Mots-clés : H.264 AVC Deblocking filter Motion compensation Variable blocks Résumé : H.264/AVC supports variable block motion compensation, multiple reference frames, 1/4-pixel motion vector accuracy, and in-loop deblocking filter, compared with previous video coding standards. While these coding techniques are major functions for video compression improvement, they lead to high computational complexity at the same time. For the H.264 video coding techniques to be actually applied on low-end/low-bit rates terminals more extensively, it is essential to improve the coding efficiency. Currently the H.264 deblocking filter, which can improve the subjective quality of video, is hardly used on low-end terminals due to computational complexity. In this paper, we propose an enhanced method of deblocking filter that efficiently reduces the blocking artifacts occurring during the low-bit rates video coding. In the ‘variable block-based deblocking filter (VBDF)’ proposed in this paper, the temporal and spatial characteristics of moving pictures are extracted using the variable block-size information of motion compensation, the filter mode is classified into four different modes according to the moving-picture characteristics, and the adaptive filtering is executed in the separate modes. The proposed VBDF can reduce the blocking artifacts, prevent excessive blurring effects, and achieve about 30–40% computational speedup at about the same PSNR compared with the existing methods. ISSN : 0923-5965 En ligne : http://www.sciencedirect.com/science/article/pii/S0923596510000068

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