OPTICAL DISC CONTROL APPARATUS AND OPTICAL DISC CONTROL METHOD

WIPO Patent Application WO/2008/044503

A1

In a case of using an external device to measure jitters of reproduced signals in an optical disc drive apparatus, not only no highly precise measurement can be achieved due to entering noise but also the cost of preparing the measuring device is required. There are included a jitter determining circuit (211) that determines the jitters of reproduced information signals from an optical disc; a buffer circuit (208) that stores jitter data; and a jitter data forwarding circuit (207) that forwards a jitter value determined by the jitter determining circuit (211) to the buffer circuit (208). A CPU (206) is used to control the jitter determining circuit (211) and jitter data forwarding circuit (207). Thus, a jitter measuring system for acquiring the jitters of the reproduced information signals from the optical disc can be realized in the optical disc control apparatus, so that no measuring device is required and a highly precise jitter measurement with no noise entering the measurement can be achieved.

TAKAO YORIKAZU
OGURA YOUICHI
SENOO DAIGO
TOMIDA YASUYUKI
TAKADA KEITA
KIYOMURA ATSUSHI

PCT/JP2007/069072

April 17, 2008

September 28, 2007

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MATSUSHITA ELECTRIC IND CO LTD (JP)
TAKAO YORIKAZU
OGURA YOUICHI
SENOO DAIGO
TOMIDA YASUYUKI
TAKADA KEITA
KIYOMURA ATSUSHI

G11B7/005; G11B7/004

JP2006196099A	2006-07-27
JP2002074668A	2002-03-15
JP2000149282A	2000-05-30
JP2006120208A	2006-05-11
JP2002133685A	2002-05-10

HAYASE, Kenichi (4F The Sumitomo Building No.2,4-7-28, Kitahama,Chuo-ku, Osaka-shi, Osaka, JP)

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