Source: http://www.google.com/patents/US7724628?dq=7181427
Timestamp: 2013-12-07 06:36:45
Document Index: 96390516

Matched Legal Cases: ['Application No. 60', 'Application No. 2002', 'Application No. 60', 'Application No. 2002', 'Application No. 2', 'Application No. 2', 'Application No. 02258466', 'Application No. 2006', 'Application No. 2002', 'Application No. 2004', 'Application No. 02258466', 'Application No. 200206662']

Patent US7724628 - Method and apparatus for recording data on optical recording medium - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Advanced Patent Search | Sign inAdvanced Patent SearchPatentsA method and apparatus to record data on an optical recording medium include generating a recording waveform having an erase pattern comprising a predetermined pulse having a high level which is higher than an erase power level and having a low level which is lower than the erase power level....http://www.google.com/patents/US7724628?utm_source=gb-gplus-sharePatent US7724628 - Method and apparatus for recording data on optical recording mediumPublication numberUS7724628 B2Publication typeGrantApplication numberUS 11/933,026Publication dateMay 25, 2010Filing dateOct 31, 2007Priority dateFeb 25, 2002Also published asUS7342860, US7376064, US7693023, US20030218954, US20040218498, US20060245328, US20080123489Publication number11933026, 933026, US 7724628 B2, US 7724628B2, US-B2-7724628, US7724628 B2, US7724628B2InventorsYong-jin Ahn, In-sik Park, Kyung-geun Lee, Chang-jin Yang, Tatsuhiro Otsuka, Seong-Sue Kim, Jung-Wan Ko, Du-seop YoonOriginal AssigneeSamsung Electronics Co., Ltd.Patent Citations (49), Non-Patent Citations (14), Referenced by (1), Classifications (9) External Links: USPTO, USPTO Assignment, EspacenetMethod and apparatus for recording data on optical recording mediumUS 7724628 B2Abstract A method and apparatus to record data on an optical recording medium include generating a recording waveform having an erase pattern comprising a predetermined pulse having a high level which is higher than an erase power level and having a low level which is lower than the erase power level.
CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of application Ser. No. 10/860,570 filed on Jun. 4, 2004, now U.S. Pat. No. 7,342,860, which is a continuation of application Ser. No. 10/372,675 filed on Feb. 25, 2003, now U.S. Pat. No. 7,376,064, and claims the benefit of Provisional Application No. 60/373,378 filed on Apr. 18, 2002, now expired, and Korean Patent Application No. 2002-9999 filed on Feb. 25, 2002, in the Korean Intellectual Property Office. The disclosures of application Ser. No. 10/860,570, application Ser. No. 10/372,675, Provisional Application No. 60/373,378, and Korean Patent Application No. 2002-9999 are incorporated herein by reference in their entirety.
FIG. 1A(a) shows a waveform of Non Return to Zero Inverted (NRZI) data, and FIGS. 1A(b) through 1A(d) show recording waveforms according to the conventional recording method. Referring to FIGS. 1A(b) through 1A(d), there are shown various recording waveforms to record the NRZI data shown in FIG. 1A(a). A first recording waveform of FIG. 1A(b) is for a DVD-RAM. Recording waveforms FIG. 1A(c) and FIG. 1A(d) are for a DVD-RW. T represents a cycle of a reference clock signal. According to the mark edge recording method, a high level of the NRZI data is recorded using marks and a low level of the NRZI data is recorded using spaces. A recording waveform used to record the mark is called �a recording pattern,� and the recording waveform used to form the space (erasing the mark) is called �an erase pattern.� Conventional recording waveforms FIG. 1A(b), FIG. 1A(c), and FIG. 1A(d) are each made of multiple pulses. A power level of each pulse is controlled to have one of four levels: Ppeak, Pb1, Pb2, and Pb3. As shown in section E, the power of the erase pattern is maintained to be a uniform predetermined DC level.
Referring to FIG. 4A(b), the NRZI data varies depending on a modulation method of the channel modulator 3. In other words, in a case where the NRZI data is modulated to Run Length Limited (RLL) (2, 10) data, i.e., a minimum length of the mark is 3T and a maximum length of the mark is 11T according to Eight to Fourteen Modulation (EFM), Eight to Fourteen Modulation Plus (EFM+), D(8-15), and Dual Modulation. Here, D(8-15) is a modulation method published in �Optical Disk Recording System of 25 GB Capacity� by S. Furumiya et al. in Optical Data Storage (ODS) 2001. Dual Modulation is disclosed in U.S. Pat. No. 6,281,815 to Shim et al. entitled �Method of Allocating RLL Code Having Enhanced DC Suppression Capability, Modulation Method, Demodulation Method, and Demodulation Apparatus Therefor� which is incorporated herein by reference. The minimum recording mark is 2T and the maximum recording mark is 8T when using RLL(1,7).
The recording waveform, according to an aspect of the present invention, has the erase pattern including the erase multi-pulse with the low and high levels Pb1 and Pb2 so as to reduce distortion of the trailing edge of the mark and improve the reproduction characteristic of the mark. In particular, the recording waveforms previously described are formed by controlling the times for which the low level Pb1 and the high level Pb2 of the erase multi-pulse last, i.e., the �lasting times,� to be within a range of 0.25-0.75T of the clock period T to select a lasting time suitable for thermal characteristics of the disc 200. Thus, the recording waveforms greatly reduce distortion of the trailing edge of the mark and improve the reproduction characteristic of the mark.
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No. 10/372,675, filed Feb. 25, 2003, Yong-jin Ahn et al., Samsung Electronics Co., Ltd.13U.S. Appl. No. 10/860,570, filed Jun. 4, 2004, Yong-jin Ahn et al., Samsung Electronics Co., Ltd.14U.S. Appl. No. 11/430,165, filed May 9, 2006, Yong-jin Ahn et al., Samsung Electronics Co., Ltd.Referenced byCiting PatentFiling datePublication dateApplicantTitleUS8416665 *Oct 30, 2008Apr 9, 2013Samsung Electronics Co., Ltd.Method of and apparatus for recording data on optical recording medium* Cited by examinerClassifications U.S. Classification369/59.11, 369/47.5International ClassificationG11B7/0055, G11B7/0045, G11B7/00Cooperative ClassificationG11B7/00557, G11B7/00456, G11B7/00454European ClassificationG11B7/0045SRotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google