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:
Apr. 28, 2009
Filed:
Jun. 21, 2004
Youichi Ogura, Saijo, JP;
Toshihiko Takahashi, Kawachinagano, JP;
Kazutoshi Aida, Hirakata, JP;
Kouji Okamoto, Ikeda, JP;
Youichi Ogura, Saijo, JP;
Toshihiko Takahashi, Kawachinagano, JP;
Kazutoshi Aida, Hirakata, JP;
Kouji Okamoto, Ikeda, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
When generating a sampling clock of an A/D converter for digitizing a playback signal from an optical disc, an over sampling clock generated by a PLL is used. Further, zerocross position information and reference information of a playback digital signal that is obtained by A/D conversion using the over sampling clock are converted into those synchronized with the channel bit clock by an operation cycle conversion unit, and then supplied to a PRML signal processing unit and a level judgement binarization unit.