| Presentation | 2003/5/9 Chroma Vector Adjustment for H.264/MPEG-4 AVC in Field Coding Mode Akira NAKAGAWA, Hidenobu MIYOSHI, Kiyoshi SAKAI, Kiichi MATSUDA, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In H.264/AVC, the basic strategy of chroma motion vector is to introduce the exact parallel motion vector with luma vector. For this reason, the resolution of the chroma motion vector is just half of the luma vector, which is, 1/8 pel resolution. However, in the past H.264 Final Committee Draft(FCD) published in July 2002, if the reference field has a different parity from the current field in the field coding mode, chroma motion vector is always shifted by 1/4 pel from the ideal exact parallel motion vector. This means that the 1/8 pel accuracy prediction doesn't operate correctly. From these reason, this unintended chroma motion vector mismatch is inconsistent with the concept to define the exact parallel chroma motion vector by introducing the highly accurate resolution. By modifying the definition of chroma motion vector in order to form to be parallel to luma motion vector, BDSNR gain in chroma (up to 1 dB gain at the first bottom field of GOP) can be observed. In this papaer, we propose to modify the semantics of chroma motion vector calculation in order to improve the coding efficiency of chroma in the field coding mode. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Windows / Word / Technical Report / Template |
| Paper # | MoMuC2003-3 |
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| Conference Information | |
| Committee | MoMuC |
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| Conference Date | 2003/5/9(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
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| Vice Chair | |
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| Paper Information | |
| Registration To | Mobile Multimedia Communications(MoMuC) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Chroma Vector Adjustment for H.264/MPEG-4 AVC in Field Coding Mode |
| Sub Title (in English) | |
| Keyword(1) | Windows |
| Keyword(2) | Word |
| Keyword(3) | Technical Report |
| Keyword(4) | Template |
| 1st Author's Name | Akira NAKAGAWA |
| 1st Author's Affiliation | FUJITSU LABORATORIES LTD.() |
| 2nd Author's Name | Hidenobu MIYOSHI |
| 2nd Author's Affiliation | FUJITSU LABORATORIES LTD. |
| 3rd Author's Name | Kiyoshi SAKAI |
| 3rd Author's Affiliation | FUJITSU LABORATORIES LTD. |
| 4th Author's Name | Kiichi MATSUDA |
| 4th Author's Affiliation | FUJITSU LABORATORIES LTD. |
| Date | 2003/5/9 |
| Paper # | MoMuC2003-3 |
| Volume (vol) | vol.103 |
| Number (no) | 57 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |