Method of reading optical information in super-resolution

Details Method of reading optical information in super-resolution Method of reading optical information in super-resolution

2011-06-07

2011-06-07

Haley, Joseph (Department: 2627)

Dynamic information storage or retrieval

Binary pulse train information signal

Including sampling or a/d converting

C369S272100, C369S275100, C369S275200, C369S124110, C369S124150, C369S100000

Reexamination Certificate

active

07957244

ABSTRACT:
The invention relates to the reading of digital optical recordings at very high density (CD, DVD, etc.). Reading is done by a PRML (“Partial Response Maximum Likelihood”) technique which uses a model of analog response to the recording of an isolated information bit. Customarily, the response model is represented by four or five signal samples having standardized levels 1 or 2. To take account of particular phenomena of super-resolution reading, the invention proposes the use of a model having 6 to 10 samples that can take 4 or 5 standardized levels. This model can result from the superposition of two simpler models having only two possible levels of samples taken from 1, 2 and 3.

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