Optimal post-filter design in oversampled lapped transforms

Time domain oversampled lapped transforms (TDOLTs) with lattice structure can guarantee linear phase and perfect reconstruction and have the advantage of improving coding efficiency and reducing blocking effects which usually exist in DCT transforms. The post-filter is not unique in TDOLTs for a fix...

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Bibliographic Details
Published inProceedings of the 31st Chinese Control Conference pp. 3798 - 3802
Main Authors Yuxia Sheng, Yu Pan
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.07.2012
Subjects
Bit rate
Discrete cosine transforms
Image reconstruction
Lapped transforms
Linear phase
Oversample
Post-filter
PSNR
Transform coding
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Summary:Time domain oversampled lapped transforms (TDOLTs) with lattice structure can guarantee linear phase and perfect reconstruction and have the advantage of improving coding efficiency and reducing blocking effects which usually exist in DCT transforms. The post-filter is not unique in TDOLTs for a fixed pre-filter. In this paper, we propose a method to design optimal post-filter for TDOLTs with known noise spectrums. The performance of reducing the blocking artifacts and effectiveness of proposed approach are demonstrated by two examples.
ISBN:1467325813
9781467325813
ISSN:1934-1768
2161-2927