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:
Sep. 23, 2003
Filed:
Oct. 19, 2000
Toshihiko Yasuma, Fujisawa, JP;
Mitsumi Electric Co., Ltd., Tokyo, JP;
Abstract
A simplified optical disc writing apparatus that is connectable to a host system is provided in which at least one part of a digital signal processing portion ( ) is carried out in the host system ( ) by using software ( ). Picked up from a first optical disc ( ) by a pickup ( ), amplified by an RF amplifier ( ), and binary coded by a binary coding circuit ( ), a binary coded signal is supplied to the host system ( ) through a host interface ( ). The software ( ) carries out a processing for EFM demodulating the binary coded signal, a processing for decoding the EFM demodulated signal, a processing for encoding user data, and a processing for EFM modulating the encoding processed signal. The EFM modulated signal is added with a strategy in a strategy adding circuit ( ), and is converted into a laser driving signal in a laser driver ( ). Responsive to the laser driving signal, the pickup ( ) writes data in a second optical disc ( ).