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Title of Journal: J Supercomput

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Abbravation: The Journal of Supercomputing

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Springer US

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10.1007/bf01420882

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1573-0484

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Highefficient video compression for social multim

Authors: Xiangyang Ji Sam Kwong BoWei Chen Seungmin Rho
Publish Date: 2014/11/29
Volume: 71, Issue: 6, Pages: 2138-2152
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Abstract

To reduce data transmission bandwidth and storage space the compression of original video is a prerequisite for social multimedia content uploading and distribution The paper proposes an efficient early detection algorithm of allzero blocks to eliminate redundant computations in H264/AVC video encoding First for DCTlike integer transforms a general sufficient condition of early detection of allzero blocks is given based on the sum of absolute differences of the prediction error block which is a direct derivation of Sousa’s method Then by analyzing the dynamic ranges of different frequency components we further refine the sufficient condition of early detection of allzero blocks for DCTlike integer transforms and apply it to 4times 4 and 8times 8 DCTlike integer transforms in H264/AVC Experimental results show that the proposed algorithm for early detection of allzero blocks outperforms Sousa’s method in complexity reduction where computations in transform quantization inverse quantization and inverse transform are significantly reduced In addition the proposed general sufficient condition of early detection of allzero blocks for H264/AVC can also be easily extended to other forms of DCTlike integer transforms As a result better audience experience and more efficient analysis can be provided for social multimedia applications

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