EP 1342234 A1 20030910 - IMPROVED OPTICAL COMPACT DISC, OR CD
Title (en)
IMPROVED OPTICAL COMPACT DISC, OR CD
Title (de)
VERBESSERTE OPTISCHE COMPACT DISC, ODER CD
Title (fr)
DISQUE OPTIQUE COMPACT (CD) AMELIORE
Publication
Application
Priority
IT 0000519 W 20001215
Abstract (en)
[origin: WO0249021A1] The invention concerns an improved optical compact disc, or CD, on which the data, with a binary digital format, are physically memorised as pits and lands of the disc surface along a spiral-shaped track running all along the surface of the disc, said track being scanned, during the data reading phase by a reading optical apparatus, by the reading optical apparatus with a constant linear velocity (CLV), the CD being characterised in that it provides at least a first portion of the track that is scanned, during the data reading phase, with a CLV included between 0.1 m/s and 1.2 m/s, preferably included between 0,9 m/s and 1.2 m/s, and/or at least a second portion of the track wherein the consecutive involutions of the spiral are separated by a constant track pitch included between 1.3 and 1.6 mu m, preferably of 1.4 mu m.
IPC 1-7
IPC 8 full level
G11B 7/007 (2006.01)
CPC (source: EP)
G11B 7/007 (2013.01)
Citation (search report)
See references of WO 0249021A1
Citation (examination)
- EP 1132899 A2 20010912 - SONY CORP [JP]
- US 6243354 B1 20010605 - TERASAKI HITOSHI [JP], et al
- JP H10302266 A 19981113 - SANYO ELECTRIC CO
- Retrieved from the Internet <URL:www.chipchapin.com/CDMedia/cdda6.php3>
- Retrieved from the Internet <URL:www.laesieworks.com/digicom/Storage_CD.html>
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 0249021 A1 20020620; AU 2395201 A 20020624; CN 1461473 A 20031210; EP 1342234 A1 20030910
DOCDB simple family (application)
IT 0000519 W 20001215; AU 2395201 A 20001215; CN 00820075 A 20001215; EP 00987613 A 20001215