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IEICE TRANSACTIONS on Fundamentals

Hierarchical Transmission of DCT Coefficients Using Multi-Code DS/SS Modulation

Masaru HONJO, Satoshi MAKIDO, Takaya YAMAZATO, Hiraku OKADA, Masaaki KATAYAMA, Akira OGAWA

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Summary :

We propose a novel hierarchical transmission method of DCT coefficients using multi-code DS/SS modulation. For low resolution image transmission over noisy channel, an error resilient and graceful degradation technique is necessary. Here, the DCT coefficients are divided into each stratum (a branch of multi-code DS/SS) and transmitted simultaneously through a noisy channel. By assigning an appropriate transmission energy that corresponds to their source energy variances, energy assignment, it is possible to maintain picture quality effectively even in a noisy channel. Analysis of this method was performed using an image data model, 2-D Gauss-Markov random field, which showed that picture quality is maintained even in the noisy channel condition.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E87-A No.11 pp.3001-3007
Publication Date
2004/11/01
Publicized
Online ISSN
DOI
Type of Manuscript
PAPER
Category
Communication Theory and Signals

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