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 |
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Article number | 5955196 |
Pages (from-to) | 589-596 |
Number of pages | 8 |
Journal | IEEE Transactions on Consumer Electronics |
Volume | 57 |
Issue number | 2 |
DOIs | |
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