Patent US4872068A successfully refreshed from Google Patents.
US4872068A
Expired / Lapsed
US
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Disk playing method resulting in reduced start-up time
Assignee: Pioneer Corp
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Filing: 1988-01-27
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Granted: 1989-10-03
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Expires: 2008-01-27
Abstract
Abstract A method and device for playing a composite disk containing separate audio-only and video-plus-audio portions in which the time until the commencement of the playing of the video-plus-audio portion is reduced. When playing of only the video-plus-audio portion is designated, a data detection point of the pickup is immediately moved toward the lead-in area of that portion, whereupon reproduction is started immediately. In another embodiment, index data is directly read from the lead-in area of the video-plus-audio portion without reading similar data for the audio-only portion. When the playing of the video-plus-audio portion is completed, the pickup is stopped at a rest position corresponding to the lead-in area of the second region.
Inventors
- 👤 Hidehiro Ishii
- 👤 Junichi Yoshio
- 👤 Osamu Watanabe
- 👤 Takeshi Izumo
- 👤 Noriyoshi Takeya
- 👤 Kazuhiko Katakami
- 👤 Masayori Shinohara
- 👤 Masao Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:49
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/79; H04N9/80; H04N9/802; G; G11; G11B; G11B19/00; G11B19/02; G11B19/12; G11B19/20; G11B19/28; G11B20/00; G11B27/00; G11B27/002; G11B27/10; G11B27/102; G11B27/105; G11B27/19; G11B27/28; G11B2220/00; G11B2220/20; G11B2220/25; G11B2220/2537; G11B2220/2545
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
111 words
A method for playing a data recording disk having a first region in which only a digital signal is recorded and a second region in which a multiplex signal containing a frequency modulated video signal and a digital signal is recorded, said second region including a lead-in area, the improvement comprising the steps of: selecting at least one of said first and second regions for playing; determining when only said second region is selected for playing; and when only said second region is selected for playing, immediately moving a data detection point of a pickup toward said lead-in area of said second region and starting reading data from said lead-in area.
Claim 2
Independent Claim
111 words
A method for playing a data recording disk having a first region in which only a digital signal is recorded and a second region in which a multiplex signal containing a frequency modulated video signal and a digital signal is recorded, said second region including a lead-in area, the improvement comprising the steps of: selecting at least one of said first and second regions for playing; determining when only said second region is selected for playing; and when only said second region is selected for playing, immediately moving a data detection point of a pickup toward said lead-in area of said second region and starting reading data from said lead-in area.
Claim 3
Dependent Claim
63 words
The method of claim 1, further comprising the steps of: when said pickup reaches said lead-in area of said second region, reading data in an area in said lead-in region where table-of-contents information may be recorded; and, if no table-of-contents information can be read in said lead-in area, terminating playing of said second region and moving said pickup to play said first region.
Claim 4
Dependent Claim
150 words
In a playing method for a composite disk having a first region in which is recorded only a digital signal and a second region in which is recorded a multiplex signal containing a video data signal and a digital signal, each of said first and second regions having a lead-in area containing index data indicative of recording contents, the improvement comprising the steps of: detecting when playing of only said second region of said composite data recording disk is selected; when playing only said second region is selected, directly reading said index data from the lead-in area of said second region with a pickup without reading said index data from the lead-in area of said first region; detecting when playing of said second region is terminated; and when playing of said second regions is terminated, stopping said pickup at a position corresponding to the lead-in area of said second region.
Claim 5
Dependent Claim
150 words
In a playing method for a composite disk having a first region in which is recorded only a digital signal and a second region in which is recorded a multiplex signal containing a video data signal and a digital signal, each of said first and second regions having a lead-in area containing index data indicative of recording contents, the improvement comprising the steps of: detecting when playing of only said second region of said composite data recording disk is selected; when playing only said second region is selected, directly reading said index data from the lead-in area of said second region with a pickup without reading said index data from the lead-in area of said first region; detecting when playing of said second region is terminated; and when playing of said second regions is terminated, stopping said pickup at a position corresponding to the lead-in area of said second region.
Claim 6
Dependent Claim
54 words
The playing method of claim 3, further comprising the initial steps of: detecting whether or not said disk is a composite disk; when said disk is a composite disk, immediately moving said pickup to said lead-in area of said second region, an otherwise moving said pickup to said lead-in area of said first region.
Claim 7
Dependent Claim
56 words
The playing method of claim 3, further comprising the steps of: determining whether said index data of said lead-in area of said second region indicates said disk is a composite disk; and, if said disk index data indicates said disk is not a composite disk, moving said pickup to said lead-in area of said first region.
Claim 8
Dependent Claim
205 words
A reproducing method for a disk reproducing device capable of reproducing a data recording disk having a first region in which only a first digital signal is recorded and a second region in which a freguency modulated video signal and a second digital signal are recorded in a superimposed manner, said device having a plurality of accommodating positions for accommodating said disks and detection means for detecting when a data detection point of a pickup reaches a position in the vicinity of a boundary of said first and second regions and generating a detection signal at that instant, said method comprising the steps of: selecting one said plurality of data recording disks accommodated in said plurality of accommodating positions; conveying the selected disk to a reproducing position; immediately moving said data detection point of said pickup to a position on said disk corresponding to a predetermined portion within said second region in response to said detection signal; judging whether an output of said pickup contains predetermined data recorded in said predetermined portion within said second region; and after reproducing recording data from the entirety of said second region in accordance with the result of said judgment, selecting another data recording disk to be subsequently reproduced.
Claim 9
Dependent Claim
205 words
A reproducing method for a disk reproducing device capable of reproducing a data recording disk having a first region in which only a first digital signal is recorded and a second region in which a freguency modulated video signal and a second digital signal are recorded in a superimposed manner, said device having a plurality of accommodating positions for accommodating said disks and detection means for detecting when a data detection point of a pickup reaches a position in the vicinity of a boundary of said first and second regions and generating a detection signal at that instant, said method comprising the steps of: selecting one said plurality of data recording disks accommodated in said plurality of accommodating positions; conveying the selected disk to a reproducing position; immediately moving said data detection point of said pickup to a position on said disk corresponding to a predetermined portion within said second region in response to said detection signal; judging whether an output of said pickup contains predetermined data recorded in said predetermined portion within said second region; and after reproducing recording data from the entirety of said second region in accordance with the result of said judgment, selecting another data recording disk to be subsequently reproduced.
References Cited (Backward Citations)
US4660100A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-02 | 1993-04-03 | 1993-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-02 | 1997-04-03 | 1997-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-02 | 2001-04-03 | 2001-10-03 | $7700.00 | Window Closed / Lapsed |