TWO DIMENSIONAL ENCODING METHOD, HOLOGRAPHIC REPRODUCTION DEVICE, AND HOLOGRAPHIC RECORDING/REPRODUCTION DEVICE

WIPO Patent Application WO/2011/077552

A1

A two dimensional encoding method wherein, with respect to a pixel set wherein pixels are arranged in square with n-pieces (n is an integer of at least 4) in the row direction and n-pieces in the column direction, two-dimensional code words are expressed by combinations of K-pieces (K is an integer of at least n) of ON-pixels and (n×n-K)-pieces of OFF-pixels; a code word group is selected from the two-dimensional code words, so that the group satisfies the conditions that (a) at least one ON-pixel is present within (2n-1)-pieces of pixels in the upper edge row and the right edge column, (b) at least one ON-pixel is present within (2n-1)-pieces of pixels in the right edge column and the lower edge row, (c) at least one ON-pixel is present within (2n-1)-pieces of pixels in the lower edge row and the left edge column, and (d) at least one ON-pixel is present within (2n-1)-pieces of pixels in the left edge column and the upper edge row (S401); and only the code words included in the code word group are allocated to user data (S402).

OGAWA AKIHITO (JP)
DOI KAZUAKI (JP)
KASHIHARA YUTAKA (JP)

PCT/JP2009/071615

June 30, 2011

December 25, 2009

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TOSHIBA KK (JP)
OGAWA AKIHITO (JP)
DOI KAZUAKI (JP)
KASHIHARA YUTAKA (JP)

G11B20/14; G03H1/26; G11B7/0065; G11B20/10

WO2009047832A1

2009-04-16

JP2007066377A	2007-03-15
JP2008112559A	2008-05-15
JP2009163842A	2009-07-23
JP2007156801A	2007-06-21

SUZUYE, Takehiko et al. (JP)
Takehiko Suzue (JP)

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