Fast thumbnail generation in integer DCT domain for H.264/AVC

Myounghoon Kim; Hoonjae Lee; Sanghoon Sull

doi:10.1109/TCE.2011.5955196

Fast thumbnail generation in integer DCT domain for H.264/AVC

Myounghoon Kim, Hoonjae Lee, Sanghoon Sull

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

In this paper, we propose a simple and efficient method for generating a thumbnail or 1/4 reduced-size image in integer Discrete Cosine Transform (DCT) domain for H.264/AVC video streams. To accomplish this, we first obtain the integer DCT coefficients of a prediction residual using a newly-defined re-scaling operation of inverse quantization, and then perform a transform domain intra prediction in integer DCT domain through simplified matrix multiplication by using only shift operation and integer addition. Finally, we generate a thumbnail directly from a H.264/AVC intra frame. Experimental results demonstrate that the proposed algorithm can reduce the total computational complexity about 16% on average, while maintaining almost the same image quality as compared to the existing method.

Original language	English
Article number	5955196
Pages (from-to)	589-596
Number of pages	8
Journal	IEEE Transactions on Consumer Electronics
Volume	57
Issue number	2
DOIs	https://doi.org/10.1109/TCE.2011.5955196
Publication status	Published - 2011 May

Bibliographical note

Funding Information:
1This research was supported by the MKE (The Ministry of Knowledge Economy), Korea, under the ITRC (Information Technology Research Center) support program supervised by the NIPA (National IT Industry Promotion Agency), (NIPA-2010-( C1090-1011-0003)).

Keywords

1/4 reduced-size image
H.264/AVC
intra frame
thumbnail
transform domain intra prediction

ASJC Scopus subject areas

Media Technology
Electrical and Electronic Engineering

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10.1109/TCE.2011.5955196

Cite this

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title = "Fast thumbnail generation in integer DCT domain for H.264/AVC",

abstract = "In this paper, we propose a simple and efficient method for generating a thumbnail or 1/4 reduced-size image in integer Discrete Cosine Transform (DCT) domain for H.264/AVC video streams. To accomplish this, we first obtain the integer DCT coefficients of a prediction residual using a newly-defined re-scaling operation of inverse quantization, and then perform a transform domain intra prediction in integer DCT domain through simplified matrix multiplication by using only shift operation and integer addition. Finally, we generate a thumbnail directly from a H.264/AVC intra frame. Experimental results demonstrate that the proposed algorithm can reduce the total computational complexity about 16% on average, while maintaining almost the same image quality as compared to the existing method.",

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AU - Sull, Sanghoon

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Fast thumbnail generation in integer DCT domain for H.264/AVC

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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