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Proceedings Paper

Efficient rate-control algorithm for fast transcoding
Author(s): Kwang-deok Seo; SangHee Lee; Jae-Kyoon Kim; Jong-Seong Koh
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Paper Abstract

In this paper, a new rate control algorithm is introduced for a fast rate control requirement in transcoding. The specific transcoding issue mentioned in this paper is referred to as bit-rate conversion. For video services in heterogeneous network environments, it is necessary to convert the bit-rate of compressed video to match it to given transmission channels of lower capacity. the transcoding of coded video streams by requantization in the DCT domain is considered as a promising technique for its low complexity and acceptable picture quality. We carried out experiments for various video sequences to validate the existence of a novel R-Q model in the requantization process and found a piecewise linearly decreasing model. Based on this model, we present an efficient rate control algorithm for transcoding, that requires much lower complexity than conventional one. Simulation results show that the proposed algorithm provides a significant advantage over conventional method in both picture quality and bit-rate deviation.

Paper Details

Date Published: 22 January 1999
PDF: 12 pages
Proc. SPIE 3528, Multimedia Systems and Applications, (22 January 1999); doi: 10.1117/12.337414
Show Author Affiliations
Kwang-deok Seo, Korea Advanced Institute of Science and Technology (South Korea)
SangHee Lee, Korea Advanced Institute of Science and Technology (South Korea)
Jae-Kyoon Kim, Korea Advanced Institute of Science and Technology (South Korea)
Jong-Seong Koh, Korea Telecom (South Korea)

Published in SPIE Proceedings Vol. 3528:
Multimedia Systems and Applications
Andrew G. Tescher; Bhaskaran Vasudev; V. Michael Bove; Barbara Derryberry, Editor(s)

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