IP Library Granted Patent US 7,116,621
Granted Patent B2
US 7,116,621 · App. 09/951,931 · Granted Oct 3, 2006

System and method for handling commands in an optical disc drive

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Quick Facts
Patent No.
US 7,116,621
App. No.
09/951,931
Granted
Oct 3, 2006
Kind
B2
Abstract

An optical disc drive waits to receive a command to perform a function on optical media in the disc drive. The optical media includes a pitted premastered area that cannot be overwritten and a grooved user-writeable area that can be overwritten. Once a command is received, one portion of the disc drive processes the command while another portion of the disc drive monitors the processing of the command and waits until the command is processed. If an error condition is detected while processing the command, the disc drive generates an event request such as a notify event request, a focus event request, a spin event request, and a tracking event request. When an event issues, the disc drive interrupts processing of the command and attempts to recover from the error condition. The state of the disc drive when the requested event was received is saved before attempting to recover from the error condition. If the recovery attempt is successful, the saved state of the disc drive is restored, and the interrupted command continues to be processed at the point where the interruption occurred. A command finished event is issued when the command is complete. If the recovery attempt was not successful, the interrupted command is replaced with a servo abort command to terminate the interrupted command.

Claims (5)

1. An optical disk drive, comprising:

an optical pickup unit configured to provide a plurality of optical sensor signals

a digital signal processor configured to receive digitized versions of the plurality of optical sensor signals and calculate a focus error signal (FES) and a tracking error signal (TES) from the digitized versions, the digital signal process processing the error signals in focus and track servo algorithm loops for controlling focus and tracking; and

a processor configured to monitor the processing of the servo algorithms in the digital signal processor, the processor being configured to command the digital signal processor to control whether the tracking and focus servo algorithms are closed.

2. The optical disk drive of claim 1 , wherein the processor is configured to generate a command finished event when a command is complete.

Assignments (9)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 10, 2018
From: OPTICAL DEVICES, LLC
To: RPX CORPORATION
Reel/Frame 045759/0582 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 28, 2013
From: OD SERVO TECHNOLOGIES, LLC
To: OPTICAL DEVICES, LLC
Reel/Frame 030302/0260 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 12, 2012
From: OD TECHNOLOGIES, LLC
To: OD SERVO TECHNOLOGIES, LLC
Reel/Frame 028941/0175 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 10, 2012
From: DPHI, INC.
To: OD TECHNOLOGIES, LLC
Reel/Frame 027507/0517 →
ADDITION OF THE MISSING TEXT FOR EXHIBITS A-C FOR THE PREVIOUSLY RECORDED ASSIGNMENT AT REEL/FRAME NO. 017653/0566. Recorded Dec 16, 2011
From: SILICON VALLEY BANK; GATX VENTURES, INC.; SEQUEL ENTREPRENEURS' FUND II, L.P.
To: DPHI ACQUISITIONS, INC.
Reel/Frame 027398/0274 →
VOLUNTARY SURRENDER AGREEMENT Recorded Dec 12, 2011
From: DATAPLAY, INC.
To: SILICON VALLEY BANK; GATX VENTURES, INC.; SEQUEL ENTREPRENEURS' FUND II, L.P.
Reel/Frame 027365/0518 →
CHANGE OF NAME Recorded Dec 12, 2011
From: DPHI ACQUISITIONS, INC.
To: DPHI, INC.
Reel/Frame 027362/0458 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 22, 2006
From: SILICON VALLEY BANK; GATX VENTURES, INC.; SEQUEL ENTREPRENEURS' FUND II, L.P.
To: DPHI ACQUISITIONS, INC.
Reel/Frame 017653/0566 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 10, 2001
From: TURNER, CHRISTOPHER J.; PROPPS, MICHAEL B.
To: DATAPLAY, INC.
Reel/Frame 012176/0996 →