EP0465053A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Disc recording/reproducing apparatus
Assignee: Sony Corp
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Filing: 1991-06-20
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Granted: —
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Expires: 2011-06-20
Abstract
Abstract During recording inputted data are sequentially written into a memory (14) at one transfer rate and are read out at a second, higher transfer rate for recording on a record medium (2). The reading of the memory (14) is such that data in a preset first amount are successively read from the memory (14) to always ensure a write space in the memory (14) which has a capacity which is higher than a predetermined second amount when the amount of the inputted data stored in the memory (14) exceeds the first amount. During playback, the recorded data are reproduced at a second transfer rate, which is higher than a first transfer rate required for outputting the reproduced data, and are written in a memory (22). The thus written data are successively read out of the memory (22) as reproduced output data at the first transfer rate. The writing of the reproduced data to the memory (22) is controlled so that a second amount of the reproduced data is written into the memory (22) and an amount of reproduced data, not less than a first amount, is always stored in the memory (22) when the amount of the reproduced data stored in the memory (22) becomes not higher than the first given amount.
Inventors
- 👤 Yasuaki C/O Patents Division Maeda
- 👤 Yuji c/o Patents Division Arataki
- 👤 Tadao C/O Patents Division Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 23:40
CPC Classifications
G; G11; G11B; G11B27/00; G11B27/10; G11B27/34; G11B19/00; G11B19/02; G11B19/04; G11B20/00; G11B20/10; G11B20/10527; G11B27/005; G11B27/19; G11B27/28; G11B27/30; G11B27/3027; G11B27/3036; G11B27/3063; G11B27/32; G11B27/327; G11B27/329; G11B27/36; G11B2020/10537; G11B2020/10592; G11B2020/1062; G11B2020/10824; G11B2220/00; G11B2220/20; G11B2220/25; G11B2220/2525; G11B2220/2529; G11B2220/2537; G11B2220/2545
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
197 words
A disc recording apparatus for recording inputted data on tracks on a disc recording medium, the apparatus comprising: memory means (14) into which successively inputted data are sequentially written at a first transfer rate and from which the inputted data are read out at a second, higher transfer rate; recording means (3, 4) for recording on the disc recording medium (2) the data read from the memory means (14); and control means for controlling the reading of the memory means (14) so that a first amount of data is successively read from the memory means (14) when the amount of the inputted data stored in the memory means (14) exceeds the first amount, in order always to ensure a write area for writing the data in the memory means (14), the write area having a capacity higher than a predetermined second amount of the inputted data; the control means (7) being connected to the recording means (3, 4) to control the recording position on the disc recording medium (2) so that the first amount of data which is sequentially read from the memory means (14) is successively recorded on the recording tracks of the recording medium (2).
Claim 2
Dependent Claim
23 words
Apparatus according to claim 1 wherein the first amount of data is not less than a minimum recording unit of the recording data.
Claim 3
Dependent Claim
65 words
Apparatus according to claim 2 wherein the control means (7) stops reading the data from the memory means (14) when the recording means (3, 4) becomes incapable of recording, due for example to a physical disturbance of the recording medium (2), and thereafter resumes reading the data from the memory means ( 14 ) after the recording means (3, 4), is again capable of recording.
Claim 4
Dependent Claim
41 words
Apparatus according to claim 3 wherein the second given amount of data is not less than the amount of data which is written in the memory means (14) during the time that the recording means (3, 4) is incapable of recording.
Claim 5
Dependent Claim
17 words
Apparatus according to any one of the preceding claims wherein the input data are time-axis compressed data.
Claim 6
Dependent Claim
22 words
Apparatus acccording to claim 5 wherein a key input (8) for presetting the time-axis compression ratio of the input data is provided.
Claim 7
Dependent Claim
28 words
Apparatus according to claim 5 further comprising an ADPCM encoder (13), and wherein the input data are written into the memory means (14) via the ADPCM encoder (13).
Claim 8
Dependent Claim
21 words
Apparatus according to any one of the preceding claims wherein the disc recording medium (2) is a magneto-optical recording medium (2).
Claim 9
Dependent Claim
33 words
Apparatus according to claim 1 wherein absolute time information corresponding to the recording position on the disc recording medium (2) together with the recording data are recorded on the disc recording medium (2).
Claim 10
Dependent Claim
218 words
A disc reproducing apparatus for reproducing data successively recorded on tracks on a disc recording medium (2), the apparatus comprising: reproducing means (3, 4) for successively reproducing the recorded data at a second transfer rate which is higher than a first transfer rate required for outputting the reproduced data; memory means (22) into which the reproduced data read out by the reproducing means (3, 4) are sequentially written at the second transfer rate, and from which the thus written data are successively read out as reproduced output data at the first transfer rate; and control means (7) for controlling the writing of the reproduced data into the memory means (22) so that a second amount of the reproduced data is written into the memory means (22) and an amount of reproduced data, not less than a first amount, is always stored in the memory means (22) when the amount of the reproduced data stored in the memory means (22) becomes not higher than the first given amount, the control means (7) also causing the reproducing means (3, 4) to control the reproduction position on the disc recording medium (2) so that the reproduced data sequentially written into the memory means (22) in an interrupted manner are successively read from the recording tracks on the disc recording medium (2).
Claim 11
Dependent Claim
24 words
Apparatus according to claim 10 wherein the first given amount of data is not less than a minimum recording unit of the recording data.
Claim 12
Dependent Claim
70 words
Apparatus according to claim 11 wherein the control means (7) stops writing the reproduced data into the memory means (22) when the reproducing means becomes unable to reproduce the recorded data, due for example to a physical disturbance of the disc recording medium (2), and thereafter resumes writing the reproduced data into the memory means (22) when the reproducing means (3, 4) is again capable of reproducing the recorded data.
Claim 13
Dependent Claim
41 words
Apparatus according to claim 12 wherein the first given amount of data is not less than the amount of data outputted from the memory means (22) during the time the reproducing means (3, 4) is incapable of reproducing the recorded data.
Claim 14
Dependent Claim
25 words
Apparatus according to any one of the preceding claims wherein the reproduced data read out from the disc recording medium (2) are time-axis compressed data.
Claim 15
Dependent Claim
32 words
Apparatus according to claim 10 wherein the reproduced data read out by the reproducing means (3, 4) includes absolute time information corresponding to the reproduction position on the disc recording medium (2).
Claim 16
Dependent Claim
65 words
Apparatus according to claim 15 comprising a display means (36) for displaying reproduction time information depending upon absolute time information obtained by the reproducing means (3, 4), and means (35) for multiplying the absolute time information by the ratio of the time of the actual reproduced output data to the reproduced absolute time and supplying the product of such multiplying to the display means (36).
Claim 17
Dependent Claim
224 words
Apparatus according to claim 1 comprising a disc reproducing apparatus for reproducing data successively recorded on tracks on a disc recording medium (2), the reproducing apparatus comprising: reproducing means (3, 4) for successively reproducing the recorded data at a second transfer rate which is higher than a first transfer rate required for outputting the reproduced data; memory means (22) into which the reproduced data read out by the reproducing means (3, 4) are sequentially written at the second transfer rate and from which the thus written data are successively read out as reproduced output data at the first transfer rate; and control means (7) for controlling the writing of the reproduced data in the memory means (22) so that a second amount of the reproduced data is written into the memory means (22) and an amount of reproduced data, not less than a first amount, are always stored in the memory means (22) when the amount of the reproduced data stored in the memory means (22) becomes not higher than the first amount; the control means (7) also causing the reproducing means (3, 4) to control the reproduction position on the disc recording medium (2) so that the reproduced data sequentially written into the memory means (22) in an interrupted manner are successively read from the recording tracks on the disc recording medium (2).
References Cited (Backward Citations)
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