A Framework for Linear Transform Approximation Using Orthogonal Basis Projection
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| Title | A Framework for Linear Transform Approximation Using Orthogonal Basis Projection |
| Authors | |
| Abstract | This paper aims to develop a novel framework to systematically trade-off computational complexity with output distortion in linear multimedia transforms, in an optimal manner. The problem is important in real-time systems where the computational resources available are time-dependent. We solve the real-time adaptation problem by developing an approximate transform framework. There are three key contributions of this paper – (a) a fast basis projection approximation framework that allows us to store signal independent partial transform results to be used in real-time, (b) estimating the complexity distortion curve for the linear transform approximation using a given basis projection approximation set and searching for optimal transform approximation which satisfies the complexity constraint with minimum distortion and (c) determining optimal operating points on complexity distortion function and a meta-data embedding algorithm for images that allows for real- time adaptation. We have applied this approach on the FFT approximation for images with excellent results. |
| Publisher | ACADEMY PUBLISHER |
| Date | 2007-06-01 |
| Source | Journal of Multimedia Vol 2, No 3 (2007) |
| Rights | Copyright © ACADEMY PUBLISHER - All Rights Reserved.To request permission, please check out URL: http://www.academypublisher.com/copyrightpermission.html. |