Document Detail


Additive vector decoding of transform coded images.
MedLine Citation:
PMID:  18276293     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
In a standard transform coding scheme of images or video, the decoder can be implemented by a table-lookup technique without the explicit use of an inverse transformation, In this new decoding method, each received code index of a transform coefficient addresses a particular codebook to fetch a component code vector that resembles the basis vector of the linear transformation. The output image is then reconstructed by summing a small number of nonzero component code vectors. With a set of well-designed codebooks, this new decoder can exploit the correlation among the quantized transform coefficients to achieve better rate-distortion performance than the conventional decoding method. An iterative algorithm for designing a set of locally optimal codebooks from a training set of images is presented. We demonstrate that this new idea can be applied to decode improved quality pictures from the bitstream generated from a standard encoding scheme of still images or video, while the complexity is low enough to justify practical implementation.
Authors:
S W Wu; A Gersho
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  IEEE transactions on image processing : a publication of the IEEE Signal Processing Society     Volume:  7     ISSN:  1057-7149     ISO Abbreviation:  IEEE Trans Image Process     Publication Date:  1998  
Date Detail:
Created Date:  2008-02-15     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9886191     Medline TA:  IEEE Trans Image Process     Country:  United States    
Other Details:
Languages:  eng     Pagination:  794-803     Citation Subset:  -    
Affiliation:
Dept. of Electr. and Comput. Eng., California Univ., Santa Barbara, CA.
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