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US5815478A
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Method of driving a CD-ROM drive
Assignee: Ts Optics Corp
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Filing: 1997-04-21
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Granted: 1998-09-29
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Expires: 2017-04-21
Abstract
Abstract A method of driving a CD-ROM drive is provided which includes the steps of setting an initial driving speed of a disk to a predetermined N× speed, and measuring a length of time t required for generating a correction error signal (CES) of a digital signal processor (DSP) while playing the disk at the predetermined N× speed. If it is determined that the measured CES generation time t is smaller than a first reference time t 1 , then the disk is played at N× speed. If it is determined that the CES generation time t is equal to or greater than the first reference time t 1 , and smaller than a second reference time t 2 , the disk is played at (N-2)×speed. If it is determined that the CES generation time t is equal to or greater than an (n-1)th reference time t n-1 and smaller than an nth reference time t n after the algorithm is sequentially repeated for all reference times between t 1 and t n , the disk is played at 2× speed. If the CES generation time t is equal to or greater than the nth reference time t n , the playing of the disk is stopped.
Inventors
- 👤 Hong-Jang Kim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:58
CPC Classifications
G; G11; G11B; G11B19/00; G11B19/02; G11B19/04; G11B19/20; G11B19/26; G11B7/00; G11B7/002; G11B7/0037
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
289 words
A method of driving a CD-ROM drive for playing a disk, comprising the steps of: (a) setting an initial driving speed of the disk to N× speed, where N=2n and n is a positive integer; (b) measuring a length of time t required to generate a correction error signal (CES) of a digital signal processor (DSP) while playing the disk at N× speed; (c) determining whether the measured CES generation time t is smaller than a first reference time t 1 ; (d) playing the disk at N× speed if it is determined in step (c) that the CES generation time t is smaller than the first reference time t 1 ; (e) determining whether the CES generation time t is equal to or greater than the first reference time t 1 and smaller than a second reference time t 2 if it is determined in step (c) that the CES generation time t is equal to or greater than the first reference time t 1 ; (f) determining whether the CES generation time t is equal to or greater than an (n-1)th reference time t 1 and smaller than an nth reference time t n after an algorithm is sequentially repeated for all reference times between t 1 and t n ; (g) playing the disk at 2× speed if it is determined in step (f) that the CES generation time t is equal to or greater than the (n-1)th reference time t n-1 and smaller than the nth reference time t n ; and (h) stopping the playing of the disk if it is determined in step (f) that the CES generation time t is equal to or greater than the nth reference time t n .
Claim 2
Independent Claim
289 words
A method of driving a CD-ROM drive for playing a disk, comprising the steps of: (a) setting an initial driving speed of the disk to N× speed, where N=2n and n is a positive integer; (b) measuring a length of time t required to generate a correction error signal (CES) of a digital signal processor (DSP) while playing the disk at N× speed; (c) determining whether the measured CES generation time t is smaller than a first reference time t 1 ; (d) playing the disk at N× speed if it is determined in step (c) that the CES generation time t is smaller than the first reference time t 1 ; (e) determining whether the CES generation time t is equal to or greater than the first reference time t 1 and smaller than a second reference time t 2 if it is determined in step (c) that the CES generation time t is equal to or greater than the first reference time t 1 ; (f) determining whether the CES generation time t is equal to or greater than an (n-1)th reference time t 1 and smaller than an nth reference time t n after an algorithm is sequentially repeated for all reference times between t 1 and t n ; (g) playing the disk at 2× speed if it is determined in step (f) that the CES generation time t is equal to or greater than the (n-1)th reference time t n-1 and smaller than the nth reference time t n ; and (h) stopping the playing of the disk if it is determined in step (f) that the CES generation time t is equal to or greater than the nth reference time t n .
Claim 3
Dependent Claim
27 words
A method of driving a CD-ROM drive as claimed in claim 1, wherein N=4 such that the disk is played at 4× speed in said step (b).
Claim 4
Dependent Claim
42 words
A method of driving a CD-ROM drive as claimed in claim 1, further comprising the step of pre-storing a program for setting the initial speed for respective disks to be inserted into the disk drive to N× speed, before said step (a).
Claim 5
Independent Claim
148 words
A method of driving a CD-ROM drive for playing a disk, comprising the steps of: (a) setting an initial driving speed of the disk to N× speed, where N=2n and n is a positive integer; (b) measuring a length of time t required to generate a correction error signal (CES) of a digital signal processor (DSP) while playing the disk at N× speed; (c) playing the disk at N× speed if the CES generation time t is smaller than a first reference time t 1 ; (d) playing the disk at 2× speed if the CES generation time t is equal to or greater than an (n-1)th reference time t n-1 and smaller than an nth reference time t n ; and (e) stopping the playing of the disk if the CES generation time t is equal to or greater than the nth reference time t n .
Claim 6
Independent Claim
148 words
A method of driving a CD-ROM drive for playing a disk, comprising the steps of: (a) setting an initial driving speed of the disk to N× speed, where N=2n and n is a positive integer; (b) measuring a length of time t required to generate a correction error signal (CES) of a digital signal processor (DSP) while playing the disk at N× speed; (c) playing the disk at N× speed if the CES generation time t is smaller than a first reference time t 1 ; (d) playing the disk at 2× speed if the CES generation time t is equal to or greater than an (n-1)th reference time t n-1 and smaller than an nth reference time t n ; and (e) stopping the playing of the disk if the CES generation time t is equal to or greater than the nth reference time t n .
Claim 7
Dependent Claim
27 words
A method of driving a CD-ROM drive as claimed in claim 4, wherein N=4 such that the disk is played at 4× speed in said step (b).
Claim 8
Dependent Claim
42 words
A method of driving a CD-ROM drive as claimed in claim 4, further comprising the step of pre-storing a program for setting the initial speed for respective disks to be inserted into the disk drive to N× speed, before said step (a).
Claim 9
Independent Claim
218 words
A method of driving a CD-ROM drive for playing a disk, comprising the steps of: (a) setting an initial driving speed of the disk to N× speed, where N=2n and n is a positive integer; (b) measuring a length of time t required to generate a correction error signal (CES) of a digital signal processor (DSP) while playing the disk at N× speed; (c) playing the disk at N× speed if the CES generation time t is smaller than a first reference time t 1 ; (d) playing the disk at (N-2)× speed if the CES generation time t is equal to or greater than the first reference time t 2 and smaller than a second reference time t 3 ; (e) playing the disk at (N-4)× speed if the CES generation time t is equal to or greater than the second reference time t 2 and smaller than a third reference time t 3 ; (f) playing the disk at 2× speed if the CES generation time t is equal to or greater than an (n-1)th reference time t n-1 and smaller than an nth reference time t n ; and (g) stopping the playing of the disk if the CES generation time t is equal to or greater than the nth reference time t n .
Claim 10
Independent Claim
218 words
A method of driving a CD-ROM drive for playing a disk, comprising the steps of: (a) setting an initial driving speed of the disk to N× speed, where N=2n and n is a positive integer; (b) measuring a length of time t required to generate a correction error signal (CES) of a digital signal processor (DSP) while playing the disk at N× speed; (c) playing the disk at N× speed if the CES generation time t is smaller than a first reference time t 1 ; (d) playing the disk at (N-2)× speed if the CES generation time t is equal to or greater than the first reference time t 2 and smaller than a second reference time t 3 ; (e) playing the disk at (N-4)× speed if the CES generation time t is equal to or greater than the second reference time t 2 and smaller than a third reference time t 3 ; (f) playing the disk at 2× speed if the CES generation time t is equal to or greater than an (n-1)th reference time t n-1 and smaller than an nth reference time t n ; and (g) stopping the playing of the disk if the CES generation time t is equal to or greater than the nth reference time t n .
Claim 11
Dependent Claim
27 words
A method of driving a CD-ROM drive as claimed in claim 7, wherein N=8 such that the disk is played at 8× speed in said step (b).
Claim 12
Dependent Claim
42 words
A method of driving a CD-ROM drive as claimed in claim 7, further comprising the step of pre-storing a program for setting the initial speed for respective disks to be inserted into the disk drive to N× speed, before said step (a).
Claim 13
Independent Claim
183 words
A method of driving a CD-ROM drive for playing a disk, comprising the steps of: (a) setting an initial driving speed of the disk to N× speed, where N=2n and n is a positive integer; (b) measuring a length of time t required to generate a correction error signal (CES) of a digital signal processor (DSP) while playing the disk at N× speed; (c) playing the disk at N× speed if the CES generation time t is smaller than a first reference time t 1 ; (d) playing the disk at (N-2)× speed if the CES generation time t is equal to or greater than the first reference time t 1 and smaller than a second reference time t 2 ; (e) playing the disk at 2× speed if the CES generation time t is equal to or greater than an (n-1)th reference time t n-1 and smaller than an nth reference time t n ; and (f) stopping the playing of the disk if the CES generation time t is equal to or greater than the nth reference time t n .
Claim 14
Independent Claim
183 words
A method of driving a CD-ROM drive for playing a disk, comprising the steps of: (a) setting an initial driving speed of the disk to N× speed, where N=2n and n is a positive integer; (b) measuring a length of time t required to generate a correction error signal (CES) of a digital signal processor (DSP) while playing the disk at N× speed; (c) playing the disk at N× speed if the CES generation time t is smaller than a first reference time t 1 ; (d) playing the disk at (N-2)× speed if the CES generation time t is equal to or greater than the first reference time t 1 and smaller than a second reference time t 2 ; (e) playing the disk at 2× speed if the CES generation time t is equal to or greater than an (n-1)th reference time t n-1 and smaller than an nth reference time t n ; and (f) stopping the playing of the disk if the CES generation time t is equal to or greater than the nth reference time t n .
Claim 15
Dependent Claim
27 words
A method of driving a CD-ROM drive as claimed in claim 10, wherein N=6 such that the disk is played at 6× speed in said step (b).
Claim 16
Dependent Claim
42 words
A method of driving a CD-ROM drive as claimed in claim 10, further comprising the step of pre-storing a program for setting the initial speed for respective disks to be inserted into the disk drive to N× speed, before said step (a).
Claim 17
Independent Claim
125 words
A method of driving a CD-ROM drive for playing a disk, comprising the steps of: (a) setting an initial driving speed of the disk to N× speed, where N=2n and n is a positive integer; (b) measuring a length of time t required to generate a correction error signal (CES) of a digital signal processor (DSP) while playing the disk at N× speed; (c) playing the disk at 2× speed if the CES generation time t is equal to or greater than an (n-1)th reference time t n-1 and smaller than an nth reference time t n ; and (d) stopping the playing of the disk if the CES generation time t is equal to or greater than the nth reference time t n .
Claim 18
Independent Claim
125 words
A method of driving a CD-ROM drive for playing a disk, comprising the steps of: (a) setting an initial driving speed of the disk to N× speed, where N=2n and n is a positive integer; (b) measuring a length of time t required to generate a correction error signal (CES) of a digital signal processor (DSP) while playing the disk at N× speed; (c) playing the disk at 2× speed if the CES generation time t is equal to or greater than an (n-1)th reference time t n-1 and smaller than an nth reference time t n ; and (d) stopping the playing of the disk if the CES generation time t is equal to or greater than the nth reference time t n .
Claim 19
Dependent Claim
27 words
A method of driving a CD-ROM drive as claimed in claim 13, wherein N=2 such that the disk is played at 2× speed in said step (b).
Claim 20
Dependent Claim
42 words
A method of driving a CD-ROM drive as claimed in claim 13, further comprising the step of pre-storing a program for setting the initial speed for respective disks to be inserted into the disk drive to N× speed, before said step (a).
Claim 21
Independent Claim
209 words
A method of driving a CD-ROM drive for playing a disk, comprising the steps of: (a) setting an initial driving speed of the disk to N× speed, where N=2n and n is a positive integer; (b) measuring a length of time t required to generate a correction error signal (CES) of a digital signal processor (DSP) while playing the disk at N× speed; (c) setting a counting value (CV) to a value of 1; (d) playing the disk at N× speed if the CES generation time t is smaller than reference time t CV , and if N is greater than 2; (e) adding a value of 1 to the CV; (f) playing the disk at (N-2(CV)+2)× speed if the CES generation time t is equal to or greater than reference time t CV-1 and smaller than reference time t CV , and if N is greater than 4; (g) repeating steps (e) and (f) if CV<(n-1) (h) playing the disk at 2× speed if the CES generation time t is equal to or greater than reference time t n-1 and smaller than reference time t n ; (i) stopping the playing of the disk if the CES generation time t is equal to or greater than reference time.
Claim 22
Independent Claim
209 words
A method of driving a CD-ROM drive for playing a disk, comprising the steps of: (a) setting an initial driving speed of the disk to N× speed, where N=2n and n is a positive integer; (b) measuring a length of time t required to generate a correction error signal (CES) of a digital signal processor (DSP) while playing the disk at N× speed; (c) setting a counting value (CV) to a value of 1; (d) playing the disk at N× speed if the CES generation time t is smaller than reference time t CV , and if N is greater than 2; (e) adding a value of 1 to the CV; (f) playing the disk at (N-2(CV)+2)× speed if the CES generation time t is equal to or greater than reference time t CV-1 and smaller than reference time t CV , and if N is greater than 4; (g) repeating steps (e) and (f) if CV<(n-1) (h) playing the disk at 2× speed if the CES generation time t is equal to or greater than reference time t n-1 and smaller than reference time t n ; (i) stopping the playing of the disk if the CES generation time t is equal to or greater than reference time.
Claim 23
Dependent Claim
42 words
A method of driving a CD-ROM drive as claimed in claim 16, further comprising the step of pre-storing a program for setting the initial speed for respective disks to be inserted into the disk drive to N× speed, before said step (a).
References Cited (Backward Citations)
US5528574A
Cited
US5636192A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-09-28 | 2002-03-30 | 2002-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-09-28 | 2006-03-30 | 2006-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-09-28 | 2010-03-30 | 2010-09-29 | $7700.00 | Window Closed / Lapsed |