| Presentation | 2002/1/3 A word length allocation method for multipliers in Lossless DCT Osamu NISHIDA, Masahiro IWAHASHI, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Recently, the lossless DCT (LDCT), which has the lifting structure and the rounding operations, is attracting many researchers' attention as an effective method for DCT based lossy / lossless unified coding. So far, previous reports regarding the LDCT focused to a few topics such as how to reduce the number of multipliers with the four point lossless Hadamard transform and the non-separable two dimensional LDCT. However, it is not analyzed enough how to express multiplier's word length as short as possible for attaining low computational load. This report, therefore, defines a new "image sensitivity" as an indicator of how the word length truncation of each coefficient affects quality of the decoded image. In addition, this report proposes a new word length allocation method based on the "image sensitivity". As a result, 2 [bit] in average shorter word length is attained maintaining decoded image quality compared to the case of using the same word length. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Lossless / DCT / sensitivity / word length / rounding |
| Paper # | 2001-DSP-145,2001-SAT-103,2001-RCS-203 |
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| Conference Information | |
| Committee | SAT |
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| Conference Date | 2002/1/3(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Satellite Telecommunications (SAT) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A word length allocation method for multipliers in Lossless DCT |
| Sub Title (in English) | |
| Keyword(1) | Lossless |
| Keyword(2) | DCT |
| Keyword(3) | sensitivity |
| Keyword(4) | word length |
| Keyword(5) | rounding |
| 1st Author's Name | Osamu NISHIDA |
| 1st Author's Affiliation | Department of Electrical Engineering, Nagaoka University of Technology() |
| 2nd Author's Name | Masahiro IWAHASHI |
| 2nd Author's Affiliation | Department of Electrical Engineering, Nagaoka University of Technology |
| Date | 2002/1/3 |
| Paper # | 2001-DSP-145,2001-SAT-103,2001-RCS-203 |
| Volume (vol) | vol.101 |
| Number (no) | 541 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |