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Authors: R. Marques 1 ; V. Silva 2 ; S. Faria 3 ; A. Navarro 4 and P. Assuncao 3

Affiliations: 1 Instituto de Telecomunicações, Portugal ; 2 Instituto de Telecomunicações; Universidade de Coimbra - DEEC, Portugal ; 3 Instituto de Telecomunicações; Instituto Politécnico de Leiria- ESTG, Portugal ; 4 Instituto de Telecomunicações; Universidade de Aveiro – DET, Portugal

Keyword(s): Transform conversion, video transcoding.

Related Ontology Subjects/Areas/Topics: Layered Coding and Transcoding ; MPEG Standards and Related Issues ; Multimedia ; Multimedia and Communications ; Multimedia Signal Processing ; Telecommunications ; Universal Multimedia Adaptation

Abstract: In this paper we propose a fast method to convert H.264/AVC 4x4 Integer Transform (IT) to standard Discrete Cosine Transform (DCT for video transcoding applications. We derive the transcoding matrix for converting, simultaneously, in the transform domain, four IT 4x4 blocks into one 8 x 8 DCT block of coefficients. By exploiting the symmetry properties of the matrix, we show that the proposed conversion method requires fewer operations than its equivalent in the pixel domain. An integer matrix approximation is also proposed. The experimental results show that a negligible error is introduced, while the computational complexity can be significantly reduced.

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Paper citation in several formats:
Marques, R.; Silva, V.; Faria, S.; Navarro, A. and Assuncao, P. (2006). FAST CONVERSION OF H.264/AVC INTEGER TRANSFORM COEFFICIENTS INTO DCT COEFFICIENTS. In Proceedings of the International Conference on Signal Processing and Multimedia Applications (ICETE 2006) - SIGMAP; ISBN 978-972-8865-64-1, SciTePress, pages 5-8. DOI: 10.5220/0001572500050008

@conference{sigmap06,
author={R. Marques. and V. Silva. and S. Faria. and A. Navarro. and P. Assuncao.},
title={FAST CONVERSION OF H.264/AVC INTEGER TRANSFORM COEFFICIENTS INTO DCT COEFFICIENTS},
booktitle={Proceedings of the International Conference on Signal Processing and Multimedia Applications (ICETE 2006) - SIGMAP},
year={2006},
pages={5-8},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0001572500050008},
isbn={978-972-8865-64-1},
}

TY - CONF

JO - Proceedings of the International Conference on Signal Processing and Multimedia Applications (ICETE 2006) - SIGMAP
TI - FAST CONVERSION OF H.264/AVC INTEGER TRANSFORM COEFFICIENTS INTO DCT COEFFICIENTS
SN - 978-972-8865-64-1
AU - Marques, R.
AU - Silva, V.
AU - Faria, S.
AU - Navarro, A.
AU - Assuncao, P.
PY - 2006
SP - 5
EP - 8
DO - 10.5220/0001572500050008
PB - SciTePress

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