The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 15, 2011
Filed:
Mar. 16, 2007
Michikazu Hashimoto, Tsurugashima, JP;
Kiyoshi Tateishi, Tsurugashima, JP;
Michikazu Hashimoto, Tsurugashima, JP;
Kiyoshi Tateishi, Tsurugashima, JP;
Pioneer Corporation, Tokyo, JP;
Abstract
A two-dimensional demodulation method for reproducing a data page by means of decision feedback Viterbi detection processing from a recording medium on which a data page has been recorded as a set of a plurality of two-dimensional modulation pattern symbols each of which comprises a plurality of pixels, and which have been modulated two-dimensionally, the method comprising: a step of determining a value of pixel deviation in a reproduction image obtained by receiving light from the recording medium on an image sensor; a step of splitting an output signal of the image sensor which indicates the reproduction image of the light received from the recording medium into signal symbol data by division into blocks in accordance with the two-dimensional modulation pattern symbols; and a step of carrying out decision feedback Viterbi detection for each signal symbol data in accordance with the pixel deviation value.