| Presentation | 2001/6/28 Analysis and Re-encoding of MPEG Coded Bitstream Sadaharu Shimamura, Kazuo Ohzeki, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Picture coding is divided into several components, such as motion compensation, inter/intra-mode switching, DCT, VLC etc. Each component has been improved with only the component. There arises a problem that an interaction with other components or a total optimization is not be considered. Two components at distant location are especially difficult to be treated and the relation between them is not shown. In this report, from an analysis of coded bitstream, redundancy of coded bitstream is evaluated. The analysis gives some policies to improve coding performance of each component and to clarify coding relation between components. A method of random number analysis is proposed. Entropy, Markov entropy, sampled calculation, auto-correlation are used for measuring redundancy of coded bitstream. To clarify the measured results, a precision criterion is derived, which gives the necessary data amount for valid measuring. Examples show the entropy values are at least 0.9-0.85. This results indicates that re-encoding is possible. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | MPEG-2 / Coding / Analysis / Bitstream / Entropy |
| Paper # | CQ2001-35 |
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| Conference Information | |
| Committee | CQ |
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| Conference Date | 2001/6/28(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Communication Quality (CQ) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Analysis and Re-encoding of MPEG Coded Bitstream |
| Sub Title (in English) | |
| Keyword(1) | MPEG-2 |
| Keyword(2) | Coding |
| Keyword(3) | Analysis |
| Keyword(4) | Bitstream |
| Keyword(5) | Entropy |
| 1st Author's Name | Sadaharu Shimamura |
| 1st Author's Affiliation | Graduate School of Engineering, Shibaura Institute of Technology() |
| 2nd Author's Name | Kazuo Ohzeki |
| 2nd Author's Affiliation | Graduate School of Engineering, Shibaura Institute of Technology |
| Date | 2001/6/28 |
| Paper # | CQ2001-35 |
| Volume (vol) | vol.101 |
| Number (no) | 166 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |