发明名称 |
Hologram recording and reproduction method, hologram recording and reproduction apparatus, and hologram recording medium |
摘要 |
A method and apparatus is disclosed which can reproduce multi-value data with high reproducibility from a hologram recording medium having data recorded in multi-values therein and can reduce the error rate of reproduction data. A reference gradation pattern is recorded in a medium, and luminance unevenness of a gradation pattern obtained by reproducing the gradation pattern is corrected. A gamma characteristic of the medium is determined based on the reproduction gradation pattern, and a modulation pattern produced using easily separable luminance values determined based on the gamma characteristic is displayed on a spatial light modulator to record data in multi-values into the medium. Thereupon, the data are oversampled and recorded, and a block of the reproduced data is decoded depending upon a sequence of relative luminance levels of pixels in the block to decode the entire reproduced multi-value data.
|
申请公布号 |
US2005185233(A1) |
申请公布日期 |
2005.08.25 |
申请号 |
US20050049725 |
申请日期 |
2005.02.04 |
申请人 |
SONY CORPORATION |
发明人 |
BABA SHIGEYUKI;KIHARA NOBUHIRO |
分类号 |
G03H1/04;G03H1/08;G03H1/22;G11B7/004;G11B7/0065;G11B7/013;G11B20/14;(IPC1-7):G03H1/08 |
主分类号 |
G03H1/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|