| Presentation | 1999/3/8 Realization of LOT with Unequal Length Basis Functions and Its Application in Subband Image Coding Takayuki Nagai, Masaaki Ikehara, Masahide Kaneko, Akira Kurematsu, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this paper,the Lapped Orthogonal Transform (LOT) with unequal length basis function is considered. The proposed unequal length LOT (ULLOT) has both long basis of length 2M (M denotes number of channels) and short basis of length M, while the lengths of all bases of the conventional LOT are 2M. The fast algorithm for the Discrete Cosine Transform (DCT) facilitates the computation of the ULLOT. Although the computational complexity of the ULLOT is always lower than that of the LOT, there exist some cases where the coding gain of the ULLOT becomes slightly higher than that of the LOT. Its ability to reduce ringing artifacts is an attractive feature as well. The size-limited structure for the finite length signal is investigated and the ULLOTs are tested on image codung application. We also extend the ULLOT to the GenLOT with unequal length basis functions (GenULLOT). |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | LOT / GenLOT / Unequal Length Basis Functions / Subband Image Coding |
| Paper # | DSP98-182 |
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| Conference Information | |
| Committee | DSP |
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| Conference Date | 1999/3/8(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Digital Signal Processing (DSP) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Realization of LOT with Unequal Length Basis Functions and Its Application in Subband Image Coding |
| Sub Title (in English) | |
| Keyword(1) | LOT |
| Keyword(2) | GenLOT |
| Keyword(3) | Unequal Length Basis Functions |
| Keyword(4) | Subband Image Coding |
| 1st Author's Name | Takayuki Nagai |
| 1st Author's Affiliation | Graduate school of Electronic Engineering, University of Electro-Communications() |
| 2nd Author's Name | Masaaki Ikehara |
| 2nd Author's Affiliation | Department of Electronics and Electrical Engineering, Keio University |
| 3rd Author's Name | Masahide Kaneko |
| 3rd Author's Affiliation | Graduate school of Electronic Engineering, University of Electro-Communications |
| 4th Author's Name | Akira Kurematsu |
| 4th Author's Affiliation | Graduate school of Electronic Engineering, University of Electro-Communications |
| Date | 1999/3/8 |
| Paper # | DSP98-182 |
| Volume (vol) | vol.98 |
| Number (no) | 648 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |