IEEE Trans Image Process - Content-adaptive motion estimation algorithm for coarse-grain SVC.

Tópicos

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Resumo

A joint model of scalable video coding (SVC) uses exhaustive mode and motion searches to select the best prediction mode and motion vector for each macroblock (MB) with high coding efficiency at the cost of computational complexity. If major characteristics of a coding MB such as the complexity of the prediction mode and the motion property can be identified and used in adjusting motion estimation (ME), one can design an algorithm that can adapt coding parameters to the video content. This way, unnecessary mode and motion searches can be avoided. In this paper, we propose a content-adaptive ME for SVC, including analyses of mode complexity and motion property to assist mode and motion searches. An experimental analysis is performed to study interlayer and spatial correlations in the coding information. Based on the correlations, the motion and mode characteristics of the current MB are identified and utilized to adjust each step of ME at the enhancement layer including mode decision, search-range selection, and prediction direction selection. Experimental results show that the proposed algorithm can significantly reduce the computational complexity of SVC while maintaining nearly the same rate distortion performance as the original encoder.

Resumo Limpo

joint model scalabl video code svc use exhaust mode motion search select best predict mode motion vector macroblock mb high code effici cost comput complex major characterist code mb complex predict mode motion properti can identifi use adjust motion estim one can design algorithm can adapt code paramet video content way unnecessari mode motion search can avoid paper propos contentadapt svc includ analys mode complex motion properti assist mode motion search experiment analysi perform studi interlay spatial correl code inform base correl motion mode characterist current mb identifi util adjust step enhanc layer includ mode decis searchrang select predict direct select experiment result show propos algorithm can signific reduc comput complex svc maintain near rate distort perform origin encod

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