EP0146773A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Apparatus for recording a digital data
Assignee: Sony Corp
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Filing: 1984-11-16
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Granted: —
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Expires: 2004-11-16
Abstract
Abstract A digital data recording device is disclosed which can record data with varying frequency on a tape using a rotating drum. The data are written into a memory (32 or 33) with an external clock signal (CKW). On recording, the data are read out using an internal clock (CKS). If the memory is completely filled, the data will occupy exactly one scan on the tape. If it is only partly filled, as monitored by the data size detector (43). the data are read out cyclically as many times as needed.
Inventors
- 👤 Kaichi C/O Sony Corporation Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 18:39
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/10527; G11B20/12; G11B20/1201; G11B20/1207; G11B20/1209; G11B20/18; G11B20/1806; G11B20/1809; G11B27/00; G11B27/005; G11B27/10; G11B27/19; G11B27/28; G11B27/30; G11B27/3027; G11B27/32; G11B27/322; G11B5/00; G11B5/008; G11B5/00813; G11B5/00847; G11B5/0086; G11B5/00865; G11B5/00873; G11B5/00878; G11B20/1211; G11B2020/10537; G11B2020/10546; G11B2220/00; G11B2220/90
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
126 words
An apparatus for recording a digital data on a slant track (10A, 10B, 10C, 10D) of recording medium (9) by a rotary head (8A, 8B, 8C, 8D), a sampling frequency of said digital data being able to be changed in accordance with the nature of said digital data, comprising memory means (2) for writing said digital data in response to an input clock signal (CKW) which is synchronized with sampling frequency and reading said digital data therefrom in response to a system clock signal (CKS); and means (4) for converting said digital data read out from said memory means (2) into a data block having such a capacity that said data block can be recorded during one scan of said rotary head (8A, 8B, 8C, 8D).
Claim 2
Independent Claim
126 words
An apparatus for recording a digital data on a slant track (10A, 10B, 10C, 10D) of recording medium (9) by a rotary head (8A, 8B, 8C, 8D), a sampling frequency of said digital data being able to be changed in accordance with the nature of said digital data, comprising memory means (2) for writing said digital data in response to an input clock signal (CKW) which is synchronized with sampling frequency and reading said digital data therefrom in response to a system clock signal (CKS); and means (4) for converting said digital data read out from said memory means (2) into a data block having such a capacity that said data block can be recorded during one scan of said rotary head (8A, 8B, 8C, 8D).
Claim 3
Dependent Claim
48 words
An apparatus according to claim 1, wherein said memory means (2) comprises a pair of memory banks (32, 33) each having such a capacity that said data block can be recorded, said pair of memory banks (32, 33) being alternately used for writing and reading said digital data.
Claim 4
Dependent Claim
112 words
An apparatus according to claim 2, wherein said memory means (2)further comprises means (36) for generating a read address and a write address to said memory banks (32, 33) and means (43) for detecting an amount of digital data which is stored in said memory banks (32, 33) during one scan of said rotary head (8A, 8B, 8C, 8D), and said generating means (36) cyclically generates the read address to said memory bank (32 or 33) to repeatedly record said digital data on the track (10A, 10B, 10C 10D) when said detecting means (43) detects that said digital data is not written in the whole of said memory bank (32 or 33).
Claim 5
Dependent Claim
37 words
An apparatus according to claim 3, wherein said detecting means (43) generates a data indicating said amount of digital data and said data is recorded on said track (10A, 10B, 10C, 10D) together with said digital data.
Claim 6
Dependent Claim
31 words
An apparatus according to claim 1, further comprising auxiliary means (41) interconnected with said memory means (2) for transferring said digital data between said memory means (2) and an external device.
Claim 7
Dependent Claim
38 words
An apparatus according to claim 5, wherein said auxiliary memory means (41) has at least such a capacity as to store said digital data of sub-block, said data block being divided into a predetermined number of said sub-blocks.
References Cited (Backward Citations)
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