EP0627855A2
Expired / Lapsed
EP
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Digital video signal recording and/or reproduction
Assignee: Sony Corp
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Filing: 1994-05-24
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Granted: —
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Expires: 2014-05-24
Abstract
Abstract When an advanced television (ATV) signal is recorded by a digital VCR (3) in the conventional television signal recording mode, variable speed reproduction data composed of high priority (HP) data containing an in-frame encoded frame (I frame) is redundantly recorded in a surplus record area that is formed by the difference between the transmission rate of the ATV signal and the transmission rate of the conventional compressed digital video signal. When variable speed reproduction is performed, the variable speed reproduction data can be successfully reproduced. <IMAGE>
Inventors
- 👤 Ching Fang C/O Int. Property Division Chang
- 👤 Naofumi C/O Int. Property Division Yanagihara
- 👤 Jun C/O Int. Property Division Yonemitsu
- 👤 Katsumi C/O Int. Property Division Tahara
- 👤 Yoichi C/O Int. Property Division Yagasaki
- 👤 Teruhiko C/O Int. Property Division Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 19:59
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; H; H04; H04N; H04N9/00; H04N9/79; H04N9/80; H04N9/804; H04N9/8042; H04N5/00; H04N5/76; H04N5/78; H04N5/782; H04N5/7824; H04N5/7826; H04N5/78263; H04N5/78266; H04N5/783; H04N9/87; H04N9/89
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
122 words
A digital video signal recording apparatus for directly recording a compressed transmission image signal on a magnetic tape, the image signal being divided into an in-frame encoded frame and a forward or bi-directional predict encoded frame that are categorized as a high priority packet and a standard priority packet, data of the in-frame encoded frame being contained in the high priority packet, comprising: surplus record area forming means for causing the transmission rate of the high priority data to be lower than the transmission rate of the conventional compressed digital video signal so as to form a surplus record area; and recording means for redundantly recording the high priority data in the surplus area formed by said surplus record area forming means.
Claim 2
Dependent Claim
32 words
The digital video signal recording apparatus as set forth in claim 1, wherein the surplus record area is formed in a reproduction valid area that is fixed in a variable speed reproduction.
Claim 3
Dependent Claim
42 words
The digital video signal recording apparatus as set forth in claim 1, wherein the high priority packet data is redundantly recorded in the surplus record area for successive n tracks when the variable speed reproduction is performed at n times higher speed.
Claim 4
Dependent Claim
36 words
The digital video signal recording apparatus as set force in claim 1, wherein the position of the high priority packet data recorded in the surplus record area is shifted whenever the in-frame encoded frame is received.
Claim 5
Dependent Claim
93 words
A digital video signal recording apparatus for directly recording a compressed transmission image signal on a magnetic tape, comprising: dividing means for dividing the image signal into high priority data and standard priority data; a surplus record area forming means for causing the transmission rate of the high priority data to be lower than the transmission rate of the conventional compressed digital video signal so as to form a surplus record area; and recording means for recording the high priority data in the surplus area formed by said surplus record area forming means.
Claim 6
Dependent Claim
75 words
A digital video signal reproducing apparatus for reproducing a digital video signal from a magnetic tape, high priority packet data and standard priority packet data being recorded on the magnetic tape, each track of the magnetic tape having a surplus record area, the high priority packet data being recorded in the surplus record area, comprising: reproducing means for reproducing the high priority packet data recorded in the surplus record area in a variable speed reproduction.
Claim 7
Dependent Claim
116 words
A digital video signal recording method for directly recording a compressed transmission image signal on a magnetic tape, the image signal being divided into an in-frame encoded frame and a forward or bi-directional predict encoded frame that are categorized as a high priority packet and a standard priority packet, data of the in-frame encoded frame being contained in the high priority packet, comprising the steps of: causing the transmission rate of the high priority data to be lower than the transmission rate of the conventional compressed digital video signal so as to form a surplus record area; and redundantly recording the high priority data in the surplus area formed by said surplus record area forming means.
Claim 8
Dependent Claim
83 words
A digital video signal recording method for directly recording a compressed transmission image signal on a magnetic tape, comprising the steps of: dividing the image signal into high priority data and standard priority data; causing the transmission rate of the high priority data to be lower than the transmission rate of the conventional compressed digital video signal so as to form a surplus record area; and recording the high priority data in the surplus area formed by said surplus record area forming means.
Claim 9
Dependent Claim
75 words
A digital video signal reproducing method for reproducing a digital video signal from a magnetic tape, high priority packet data and standard priority packet data being recorded on the magnetic tape, each track of the magnetic tape having a surplus record area, the high priority packet data being recorded in the surplus record area, comprising the steps of: reproducing the high priority packet data recorded in the surplus record area in a variable speed reproduction.
Claim 10
Dependent Claim
101 words
A digital video signal recording method for redundantly recording high priority packet data of a compressed transmission image signal to a surplus record area, the surplus record area being formed by the difference between the transmission rate of the compressed transmission image signal and the transmission rate of a conventional compressed digital video signal, comprising the steps of: recording one of two high priority packet data sets to 2n (where n is a magnification of variable speed reproduction) tracks with a first azimuth angle; and recording the other high priority packet data set to 2n tracks with a second azimuth angle.
Claim 11
Dependent Claim
37 words
The digital video signal recording method as set forth in claim 10, wherein the magnification of the variable speed reproduction is 17, the number of tracks on which the two high priority packet data sets being 36.
Claim 12
Dependent Claim
123 words
A digital video signal recording apparatus for directly recording a compressed transmission image signal on a magnetic tape, comprising: surplus record area forming means for causing the transmission rate of the high priority data to be lower than the transmission rate of the conventional compressed digital video signal so as to form a surplus record area; means for redundantly recording the high priority data in the surplus area formed by said surplus record area forming means; means for recording one of two high priority packet data sets to 2n (where n is a magnification of variable speed reproduction) tracks with a first azimuth angle; and means for recording the other high priority packet data set to 2n tracks with a second azimuth angle.
Claim 13
Dependent Claim
37 words
The digital video signal recording apparatus as set forth in claim 12, wherein the magnification of the variable speed reproduction is 17, the number of tracks on which the two high priority packet data sets being 36.
References Cited (Backward Citations)
No citation records indexed.
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