Advances in Multimedia

Advances in Multimedia / 2007 / Article
Special Issue

Multimedia Transmission over Emerging Wireless Technologies

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Research Article | Open Access

Volume 2007 |Article ID 024758 | https://doi.org/10.1155/2007/24758

Hannes Persson, Anna Brunstrom, Tony Ottosson, "Utilizing Cross-Layer Information to Improve Performance in JPEG2000 Decoding", Advances in Multimedia, vol. 2007, Article ID 024758, 10 pages, 2007. https://doi.org/10.1155/2007/24758

Utilizing Cross-Layer Information to Improve Performance in JPEG2000 Decoding

Academic Editor: Stavros Kotsopoulos
Received01 May 2007
Accepted28 Jul 2007
Published01 Oct 2007

Abstract

We focus on wireless multimedia communication and investigate how cross-layer information can be used to improve performance at the application layer, using JPEG2000 as an example. The cross-layer information is in the form of soft information from the physical layer. The soft information, which is supplied by a soft decision demodulator, yields reliability measures for the received bits and is fed into two soft input iterative JPEG2000 image decoders. When errors are detected with the error detecting mechanisms in JPEG2000, the decoders utilize the soft information to point out likely transmission errors. Hence, the decoders can correct errors and increase the image quality without making time-consuming retransmissions. We believe that the proposed decoding method utilizing soft information is suitable for a general IP-based network and that it keeps the principles of a layered structure of the protocol stack intact. Further, experimental results with images transmitted over a simulated wireless channel show that a simple decoding algorithm that utilizes soft information can give high gains in image quality compared to the standard hard-decision decoding.

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Copyright © 2007 Hannes Persson et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


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