Patent EP0546691A2 successfully refreshed from Google Patents.
EP0546691A2
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EP
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Digital recording and reproduction
Assignee: Samsung Electronics Co Ltd
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Filing: 1992-11-12
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Granted: —
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Expires: 2012-11-12
Abstract
Abstract Disclosed is a recording and reproducing method for use in a digital magnetic tape recording and/or reproducing apparatus for facilitating a variable speed reproduction. A variable length codified result of a DCT block is divided into first data having a predetermined length and including DC and low frequency components, and second data of a variable length having a high frequency component. The first and second data are edited and recorded on a particular block. During a normal reproduction, the first data and the second data both are used, thereby regenerating the original picture. During a variable speed reproduction, the first data only is used, thereby regenerating the original picture.
Inventors
- 👤 Jong-Kyung Yun
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 19:57
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/92; H04N5/926; H04N5/9261; H04N5/9264; H04N5/93; H04N5/94; H04N5/945; H04N5/78; H04N5/782; H04N5/783
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
156 words
A digital magnetic tape recording and reproducing method which uses a discrete cosine transform coding method and a variable length coding method, and comprises the steps of: dividing a variable length codified result of a DCT block into first data having a predetermined length and including DC and low frequency components, and second data having a remaining code excluding said first data from said variable length codified result; and recording low frequency blocks which include said first data on respective tracks of said magnetic tape in sequence, and recording high frequency blocks which include said second data having a relationship of duality with said first data including a high frequency component at the end of the track: wherein, during normal reproduction, said low frequency blocks and said high frequency blocks are all used, thereby reproducing an original picture, and during a variable speed reproduction, said low frequency blocks only are used, thereby reproducing the original picture.
Claim 2
Dependent Claim
23 words
A digital magnetic tape recording and reproducing method as claimed in claim 1, wherein said low frequency blocks are of the same length.
Claim 3
Dependent Claim
27 words
A digital magnetic tape recording and reproducing method as claimed in claim 1 or 2, wherein said low frequency blocks comprise a plurality of said first data.
Claim 4
Dependent Claim
74 words
A digital magnetic tape recording and reproducing method for use in a digital magnetic tape recording and reproducing apparatus, said method comprising the steps of: dividing one frame of video data into a plurality of macro blocks having smaller sizes; and adding the respective divided macro blocks with sync data and a block address for recording: wherein, during a variable speed reproduction, a data reproduction rate by means of a reproduction head is enhanced.
Claim 5
Dependent Claim
31 words
A digital magnetic tape recording and reproducing method as claimed in claim 4, wherein each said macro block comprises an error correction code including an inner code and an outer code.
Claim 6
Dependent Claim
61 words
A digital magnetic tape recording and reproducing method including an error correction code having an inner code and an outer code, said method comprising the steps of: performing an error correction by means of an inner code and an outer code during normal reproduction; and performing an error correction by means of only said inner code during a variable speed reproduction.
Claim 7
Independent Claim
47 words
A method of recording a signal in digital form on a recording medium, comprising those steps of a method according to any of the preceding claims that are necessary to record a signal suitable to be reproduced by a method according to the or each such claim.
Claim 8
Independent Claim
47 words
A method of reproducing a signal which has been recorded in digital form on a recording medium by a method according to any of the preceding claims, comprising those steps of the method according to the or each such claim that are necessary to reproduce a signal.
Claim 9
Dependent Claim
11 words
Recording apparatus adapted to perform a method according to claim 7.
Claim 10
Dependent Claim
18 words
Reproducing or recording/reproducing apparatus adapted to perform a method according to claim 8 or claims 7 and 8.
References Cited (Backward Citations)
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