EP0440224A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Data playback apparatus for realizing high transfer rate
Assignee: Panasonic Holdings Corp
•
Filing: 1991-01-31
•
Granted: —
•
Expires: 2011-01-31
Abstract
Abstract A data playback apparatus for reproduction of data from a recording medium in which digital data are serially and successively recorded. The data playback apparatus is equipped with a control unit which controls a reproduction unit for reproducing data from the recording medium. The control unit determines a predetermined condition such as presence or absence of requirement of a real-time data reproduction on the basis of control information which is recorded together with the data in the recording medium. In accordance with the predetermined condition, the control unit controls the reproduction unit so as to change the reproduction speed of the data from the recording medium, thereby realizing a high transfer rate in reproduction.
Inventors
- 👤 Hiroyuki Iitsuka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 16:12
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B19/00; G11B19/02; G11B19/12; G11B19/20; G11B19/26; G11B20/12; G11B20/1217; G11B20/1254; G11B27/00; G11B27/005; G11B27/10; G11B27/102; G11B27/105; G11B27/19; G11B27/28; G11B27/30; G11B27/3027; G11B27/3063; G11B27/32; G11B27/327; G11B27/329; G11B27/36; G11B2020/1087; G11B2020/10888; G11B2220/00; G11B2220/20; G11B2220/21; G11B2220/213; G11B2220/25; G11B2220/2525; G11B2220/2537; G11B2220/2545
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
201 words
A data playback apparatus for reproduction of at least data and control information recorded in a recording medium, comprising: reproduction means for reproducing said data and control information from said recording medium so as to output a reproduction signal containing said data and control information; separation means coupled to said reproduction means so as to be responsive to said reproduction signal therefrom to separately output said control information and said data; processing and outputting means coupled to said separation means for processing and outputting said data outputted from said separation means; and control means coupled to said separation means to be responsive to said control information therefrom so as to determine, on the basis of said control information, whether the reproduction of said data recorded in said recording medium is required to be effected on the basis of the real time, said control means being coupled to said reproduction means so as to perform the reproduction of said data from said recording medium at a higher speed when the reproduction is not required to be effected on the basis of the real time as compared with the case of being required to be effected on the basis of the real time.
Claim 2
Dependent Claim
71 words
A data playback apparatus as claimed in claim 1, wherein said recording medium has a disc-like configuration and has thereon coaxial or spiral tracks in which said control information and said data are recorded under the conditions of a constant angular velocity or constant linear velocity, and said reproduction means reproduces said data from said recording medium at the higher speed by increasing the reproduction angular velocity or reproduction linear velocity.
Claim 3
Dependent Claim
54 words
A data playback apparatus as claimed in claim 1, wherein, in the case that the reproduction of said data is not required to be effected on the basis of the real time, said control means controls said reproduction means to reproduce said data at a reproduction speed designated by said processing and outputting means.
Claim 4
Dependent Claim
87 words
A data playback apparatus as claimed in claim 1, further comprising mode-changing switch means switchable from an external for performing a switching operation between a normal mode and a high-speed mode, and wherein said control means controls said reproduction means to reproduce the data of said recording medium at the higher speed only in the case that said mode-changing switch means is directed to said high-speed mode and that the reproduction of said data is not required to be effected on the basis of the real time.
Claim 5
Dependent Claim
271 words
A data playback apparatus for reproduction of data recorded in a recording medium, comprising: reproduction means for reproducing said data from said recording medium and outputting the reproduced data; selection means coupled to said reproduction means for selectively distributing said data outputted from said reproduction means; processing means coupled to said selection means to be responsive to the data distributed by said selection means, said processing means once storing therein the distributed data so as to process the stored data and output the processed data after completion of the reproduction to be effected by said reproduction means; output means coupled to said selection means and said processing means to be allowed to be responsive to the data distributed by said selection means and the data outputted from said processing means so as to convert the data into a signal to be outputted to an external; and control means coupled to said processing means and said reproduction means so as to control said reproduction means to reproduce said data at a first reproduction speed and further to control said selection means to supply the data from said reproduction means to said output means when said processing means causes the data of said recording medium to be supplied to said output means, and control said reproduction means to reproduce the data from said recording medium at a second reproduction speed higher than said first reproduction speed and further to control said selection means to supply the data from said reproduction means to said processing means when said processing means causes the data of said recording medium to be supplied to said processing means.
Claim 6
Dependent Claim
86 words
A data playback apparatus as claimed in claim 5, wherein said recording medium has a disc-like configuration and has thereon coaxial or spiral tracks in which said data are recorded under the conditions of a constant angular velocity or constant linear velocity, and wherein, in the case of reproducing the data from said recording medium at said second reproduction speed, the reproduction angular velocity or reproduction linear velocity is more increased as compared with the case of reproducing the data therefrom at said first reproduction speed.
Claim 7
Dependent Claim
84 words
A data playback apparatus as claimed in claim 5, wherein an application program is recorded in said recording medium, and said processing means is equipped with a read-only memory in which a basic program is stored, microprocessor means, and a write-allowable memory, whereby said application program is stored in said write-allowable memory and said microprocessor executs said basic program and said application program to instruct said control means to supply the data in said recording medium to said output means or said processing means.
Claim 8
Dependent Claim
40 words
A data playback apparatus as claimed in claim 5, wherein, when supplying the data reproduced from said recording medium to said processing means, said processing means instructs said control means in terms of the reproduction speed for said recording medium.
Claim 9
Dependent Claim
79 words
A data playback apparatus as claimed in claim 5, wherein further comprising mode-changing switch means switchable from an external for performing a switching operation between a normal mode and a high-speed mode, and wherein said control means controls said reproduction means to reproduce the data from said recording medium at said second reproduction speed only in the case that said mode-changing switch means is directed to said high-speed mode and that the data are supplied to said processing means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.