&lt;title&gt;Coding tradeoffs for high-density holographic data storage&lt;/title&gt;

Burr, Geoffrey W.; Marcus, Brian

doi:10.1117/12.370244

Cited by 20 publications

(7 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In HDS systems, there are various modulation codes that have a specific constraint. CW codes 18) include a constant number of ON pixels in a modulation-coded block. The CW codes are classified as the CW sparse code 18) and CW balanced code.…”

Section: Proposed Id Scheme Using the Spbmentioning

confidence: 99%

“…CW codes 18) include a constant number of ON pixels in a modulation-coded block. The CW codes are classified as the CW sparse code 18) and CW balanced code. 18) The CW sparse codes contain fewer ON pixels than OFF pixels, and the CW balanced codes contain the same number of ON and OFF pixels.…”

Section: Proposed Id Scheme Using the Spbmentioning

confidence: 99%

“…In general, modulation codes have a specific constraint in a modulation-coded block. For example, a constant-weight (CW) code 18) always has a constant number of ON pixels in a modulation-coded block and the conventional 4:6 modulation code 11) always has an even number of ON pixels in a modulation-coded block. These inherent constraints can be regarded as a kind of parity bit in the ID-MC.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Two-Dimensional Iterative Decoding Schemes for Holographic Data Storage Systems

Kim

Kong

Choi³

2012

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

Two iterative decoding (ID) schemes, which are the ID using a single parity bit (ID-SPB) and ID using a modulation code (ID-MC), are proposed for holographic data storage systems. In the ID-SPB, a single two-dimensional parity bit is employed to conduct ID, whereas in the ID-MC, the inherent constraint of the modulation code is utilized to conduct ID. In both schemes, a data page is iteratively decoded by exchanging extrinsic information between the horizontal and vertical data bits in the page. In particular, in the ID-SPB, by adding more parity bits to each row and column of the interleaved page, we can conduct the ID within a page as well as between the original and interleaved pages. Thus, additional performance gain can be achieved in the ID-SPB. On the other hand, the ID-MC has a performance gain without loss of data rate since parity bits are not required for ID. The simulation results show that the proposed ID-SPB and ID-MC have about 2-4 and 1-2 dB performance gains in terms of bit error rate compared with the system without ID, respectively. #

show abstract

Section: Proposed Id Scheme Using the Spbmentioning

confidence: 99%

Section: Proposed Id Scheme Using the Spbmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Two-Dimensional Iterative Decoding Schemes for Holographic Data Storage Systems

Kim

Kong

Choi³

2012

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…[1][2][3][4] The data reproduction is executed by two-dimensional signal processing, and various two-dimensional recording schemes have been proposed. [5][6][7][8] A pixel-matching type of recording code, in which the centers of reproduced bright spots always coincide with the centers of image sensor pixels, is advantageous for achieving high recording densities. However, realization of such a code is challenged by the requirement of precise alignment to correct translation and rotation of a reproduced image, and it is not robust against image distortions.…”

Section: Introductionmentioning

confidence: 99%

Tolerance for translation disturbances of template-matching two-dimensional modulation code for holographic memories

Senda

2010

Opt. Eng

View full text Add to dashboard Cite

The decoding performance of the 4 / 9 code, which depends on the accuracies of similarity comparisons for the code and the positional marker, was computationally evaluated in response to translation disturbances. The reproduction bright spot size ͑͒ was constrained to be smaller than the image-sensor pixel pitch ͑p͒ for the code, and Ͼ p was necessary for the marker. These contradictory requirements were solved by a reproduction method in which a large numerical aperture ͑NA͒ was set for the code and a small NA was set for the marker. A bit error rate of 10 −4 and a position detection resolution of ϳp / 10 were confirmed in the read-only-type holographic memory where the above method using two different NAs was applied.

show abstract

“…With a constant-weight page, low-complexity correlation detection can be efficiently implemented (Coufal et al, 2000;Burr & Marcus, 1999;Burr et al, 1997). Two kinds of weight distribution garner interests of researchers.…”

Section: Constant-weight Constraintmentioning

confidence: 99%