Patent EP0424138A2 successfully refreshed from Google Patents.
EP0424138A2
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EP
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Video signal recording-reproduction device
Assignee: Sharp Corp
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Filing: 1990-10-18
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Granted: —
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Expires: 2010-10-18
Abstract
Abstract A recording-reproduction device is provided with at least one pair of recording-reproduction heads and a plurality of pairs of variable speed reproduction heads, which divides up and records onto a plurality of tracks video signals for one field and conducts reproduction of the video signals recorded on the tracks. The height disparities between the paired heads of the variable speed reproduction heads are set to three times the height disparities of the recording- reproduction heads so that image signals corresponding to horizontal scanning lines appearing at nearly regular line intervals on a reproduction screen can be reproduced from the tracks. The device comprises a reproduction processing circuit which obtains video signals for a variable speed reproduction whose video signal band is compressed by causing at least one of those setting conditions of the field frequency, the number of horizontal scanning lines and the horizontal scanning frequency for video signals to be reproduced to vary with the setting conditions relating to the video signals recorded on the tracks. Accordingly, it is possible to form a pictorial image possessing a picture quality sufficient for the performing of search using only a part of the recorded video signals. The device is further provided with a simplified monitor for displaying a pictorial image based on the video signals for the variable speed reproduction at the tide of variable speed reproduction.
Inventors
- 👤 Hironobu Katayama
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 05:55
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/93; H04N5/937; H04N5/78; H04N5/782; H04N5/7824; H04N5/7826; H04N5/78263; H04N5/78266; H04N5/783
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
103 words
A recording-reproduction device which divides up and records video signals for one field onto a plurality of tracks and reproduces the video signals recorded onto the tracks, comprising: variable speed reproduction means with which are formed video signals for variable speed reproduction whose video signal band-width is compressed using a part of the video signals of the tracks, by means of varying at least one of those setting conditions of a field frequency, number of horizontal scanning lines per frame and a horizontal scanning frequency of video signals to be reproduced with setting conditions relating to the video signals recorded onto the tracks.
Claim 2
Dependent Claim
103 words
A recording-reproduction device which divides up and records video signals for one field onto a plurality of tracks and reproduces the video signals recorded onto the tracks, comprising: variable speed reproduction means with which are formed video signals for variable speed reproduction whose video signal band-width is compressed using a part of the video signals of the tracks, by means of varying at least one of those setting conditions of a field frequency, number of horizontal scanning lines per frame and a horizontal scanning frequency of video signals to be reproduced with setting conditions relating to the video signals recorded onto the tracks.
Claim 3
Dependent Claim
34 words
A recording-reproduction device according to claim 1, further comprising display means for variable speed reproduction which displays a pictorial image based on the video signals for variable speed reproduction during a variable speed reproduction.
Claim 4
Dependent Claim
29 words
A recording-reproduction device according to claim 2, wherein said display means for variable speed reproduction may be a simplified monitor comprising a small-sized CRT or liquid crystal display elements.
Claim 5
Dependent Claim
54 words
A recording-reproduction device according to claim 1, further comprising a plurality of paired variable speed reproduction heads, wherein height disparities of said paired heads are respectively set in such a manner that video signals corresponding to horizontal scanning lines appearing at nearly regular intervals on a reproduction screen may be reproduced from the tracks.
Claim 6
Dependent Claim
47 words
A recording-reproduction device according to claim 4, wherein said variable speed reproduction means comprises a reproduction processing circuit for performing ordered rearrangement from a low line number of signals reproduced by said variable speed reproduction heads so as to form the video signals for variable speed reproduction.
Claim 7
Dependent Claim
90 words
A recording-reproduction device according to claim 5, wherein said reproduction processing circuit comprises: a pair number computation circuit which computates a pair number showing in what number order was reproduced a given signal among signals reproduced by the variable speed reproduction heads; a track number discrimination circuit which discriminates track numbers based on track discrimination numbers appended to the reproduced video signals; and a memory in which reproduction video signals are stored and from which the stored reproduction video signals are read-out in order from a low line number thereof.
Claim 8
Dependent Claim
89 words
A recording-reproduction device provided with at least one pair of recording-reproduction heads, which divides up and records onto a plurality of tracks video signals for one field and reproduces the video signals recorded onto the tracks, comprising: a plurality of paired variable speed reproduction heads, wherein height disparities of each of the paired heads of said variable speed reproduction heads are set in such a manner that video signals corresponding to horizontal scanning lines appearing at nearly regular line intervals on reproduction screen may be reproduced from the tracks.
Claim 9
Dependent Claim
89 words
A recording-reproduction device provided with at least one pair of recording-reproduction heads, which divides up and records onto a plurality of tracks video signals for one field and reproduces the video signals recorded onto the tracks, comprising: a plurality of paired variable speed reproduction heads, wherein height disparities of each of the paired heads of said variable speed reproduction heads are set in such a manner that video signals corresponding to horizontal scanning lines appearing at nearly regular line intervals on reproduction screen may be reproduced from the tracks.
Claim 10
Dependent Claim
29 words
A recording-reproduction device according to claim 7, wherein the height disparities of said variable speed reproduction heads are set to three times the height disparities of the recording-reproduction heads.
Claim 11
Dependent Claim
77 words
A variable speed reproduction method for video signals divided up and recorded onto tracks comprising the steps of: reproducing signals on a plurality of tracks at a speed varying from an ordinary reproduction speed by means of one pair of variable speed reproduction heads; rearranging the reproduced signals in order from a low line number thereof and forming variable speed reproduction video signals; and displaying a pictorial image based on video signals for a variable speed reproduction.
Claim 12
Dependent Claim
77 words
A variable speed reproduction method for video signals divided up and recorded onto tracks comprising the steps of: reproducing signals on a plurality of tracks at a speed varying from an ordinary reproduction speed by means of one pair of variable speed reproduction heads; rearranging the reproduced signals in order from a low line number thereof and forming variable speed reproduction video signals; and displaying a pictorial image based on video signals for a variable speed reproduction.
Claim 13
Dependent Claim
59 words
A variable speed reproduction method according to claim 9, further comprising the steps of: reproducing signals of a plurality of tracks by means of another pair of variable speed reproduction heads; and composing each of specified parts relating to the signals reproduced by the two pairs of variable speed reproduction heads and forming video signals for variable speed reproduction.
Claim 14
Dependent Claim
150 words
Apparatus for reproducing video signals which are recorded on a tape in such a way that the video signal for a picture field is spread over a predetermined plurality of adiacent tracks extending across the tape and such that each scan line group comprising a said predetermined plurality of successive scan lines of the field (0 to 5, 6 to 11, 12 to 17 etc) occupies a group of corresponding portions of said plurality of tracks, the apparatus being adapted for reproduction not only in a normal speed mode but also in at least one higher speed mode in which the tape is simultaneously scanned along first and second retrace paths which extend across the tape and which each cross over from an initial track (T0/T3, T4/T1′) to another track (T2/T5, T0′/T3′) wherein the spacing of said retrace paths along the tape is three times the spacing of the tracks.
Claim 15
Dependent Claim
150 words
Apparatus for reproducing video signals which are recorded on a tape in such a way that the video signal for a picture field is spread over a predetermined plurality of adiacent tracks extending across the tape and such that each scan line group comprising a said predetermined plurality of successive scan lines of the field (0 to 5, 6 to 11, 12 to 17 etc) occupies a group of corresponding portions of said plurality of tracks, the apparatus being adapted for reproduction not only in a normal speed mode but also in at least one higher speed mode in which the tape is simultaneously scanned along first and second retrace paths which extend across the tape and which each cross over from an initial track (T0/T3, T4/T1′) to another track (T2/T5, T0′/T3′) wherein the spacing of said retrace paths along the tape is three times the spacing of the tracks.
Claim 16
Dependent Claim
121 words
Apparatus for reproducing video signals which are recorded on a tape in such a way that the video signal for a picture field is spread over a predetermined plurality of adjacent tracks extending across the tape and such that each scan line group comprising a said predetermined plurality of successive scan lines of the field (0 to 5, 6 to 11, 12 to 17 etc) occupies a group of corresponding portions of said plurality of tracks, the apparatus being adapted for reproduction not only in a normal speed mode but also in at least one higher speed mode, the apparatus having an integral display screen (9) for displaying a picture based on the video signal reproduced in said higher speed mode.
Claim 17
Dependent Claim
121 words
Apparatus for reproducing video signals which are recorded on a tape in such a way that the video signal for a picture field is spread over a predetermined plurality of adjacent tracks extending across the tape and such that each scan line group comprising a said predetermined plurality of successive scan lines of the field (0 to 5, 6 to 11, 12 to 17 etc) occupies a group of corresponding portions of said plurality of tracks, the apparatus being adapted for reproduction not only in a normal speed mode but also in at least one higher speed mode, the apparatus having an integral display screen (9) for displaying a picture based on the video signal reproduced in said higher speed mode.
References Cited (Backward Citations)
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