EP0495480A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Video tape recorder for multi-channel recording
Assignee: Panasonic Holdings Corp
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Filing: 1992-01-15
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Granted: —
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Expires: 2012-01-15
Abstract
Abstract 5 n7 A video tape recorder in which video and audio signals of a plurality of channels are simultaneously recorded onto the same tape by using the same tape running mechanism and the signals of a plurality of channels are simultaneously reproduced from the tape is disclosed. The video tape recorder of the invention comprises a recording system and a playback system. The recording system includes recording processing means (2, 8) for converting the plurality of video signals into recordable signals, respectively, first and second rotary head pairs (3, 4; 9, 10) which are oppositely arranged to a cylinder and each head has a track width narrower than a recording track pitch and which have gap azimuth angles in an opposite relation, and records the signals onto the tape and reads out the signals from the tape, and means (16, 18) for recording a control signal synchronous with a vertical sync signal included in one video signal onto a control track. The playback system includes a playback processing means (12, 49) for reconstructing reproduced signals from the rotary head pairs into video signals and servo means (19, 20) for reproducing the control signal to control the rotary head pair and the tape run.
Inventors
- 👤 Masao Tomita
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 13:35
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; G; G11; G11B; G11B5/00; G11B5/008; G11B5/00813; G11B5/00847; G11B5/0086; G11B5/00865; G11B5/00873; G11B15/00; G11B15/02; G11B15/12; G11B15/125; G11B15/18; G11B15/46; G11B15/467; G11B15/4673; G11B15/4675; G11B15/4676; G11B15/4677; G11B5/00878; H04N5/78; H04N5/782; H04N5/7824; H04N5/7826; H04N5/78263; H04N5/91; H04N5/92; H04N5/9201; H04N5/9205; H04N9/00; H04N9/79; H04N9/80; H04N9/802
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
323 words
A recording and reproducing apparatus for recording and reproducing a plurality of video signals having a vertical sync signal onto and from a video tape running relatively to a rotary clinder by rotary head pairs mounted on the rotary cylinder, the video tape having a control track and a recording track and tracks with a predetermined recording track pitch, the apparatus comprising (A) a recording system including: recording processing means (2, 8) for converting said video signals into recordable signals, respectively; a first pair of rotary heads (3, 4), each head having a track width narrower than said recording track pitch and a gap azimuth angle having a reverse direction to each other and being located at an opposite position on the cylinder, the pair recording a first one of the recordable signals onto the video tape and reading out the same signal form the video tape; a second pair of rotary heads (9, 10), each head having a track width narrower than said recording track pitch and a gap azimuth angel having a reverse direction to each other and being located at an opposite position on the cylinder, the pair recording a second one of the recordable signals onto the video tape and reading out the same signal from the video tape; and means (16, 18) for generating a control signal synchronously with the vertical sync signal included in any one of the video signals and for recording said control signal to the control track, and (B) a playback system used with said first and second pairs of rotary heads, the playback system including: playback processing means (12, 49) for reconstructing signals read out and reproduced through one of said first and second pairs of the rotary heads into video signals; and servo means (19, 20) for reproducing the control signal and for controlling operation of the rotary heads and running of the video tape in accordance with the reproduced control signal.
Claim 2
Dependent Claim
323 words
A recording and reproducing apparatus for recording and reproducing a plurality of video signals having a vertical sync signal onto and from a video tape running relatively to a rotary clinder by rotary head pairs mounted on the rotary cylinder, the video tape having a control track and a recording track and tracks with a predetermined recording track pitch, the apparatus comprising (A) a recording system including: recording processing means (2, 8) for converting said video signals into recordable signals, respectively; a first pair of rotary heads (3, 4), each head having a track width narrower than said recording track pitch and a gap azimuth angle having a reverse direction to each other and being located at an opposite position on the cylinder, the pair recording a first one of the recordable signals onto the video tape and reading out the same signal form the video tape; a second pair of rotary heads (9, 10), each head having a track width narrower than said recording track pitch and a gap azimuth angel having a reverse direction to each other and being located at an opposite position on the cylinder, the pair recording a second one of the recordable signals onto the video tape and reading out the same signal from the video tape; and means (16, 18) for generating a control signal synchronously with the vertical sync signal included in any one of the video signals and for recording said control signal to the control track, and (B) a playback system used with said first and second pairs of rotary heads, the playback system including: playback processing means (12, 49) for reconstructing signals read out and reproduced through one of said first and second pairs of the rotary heads into video signals; and servo means (19, 20) for reproducing the control signal and for controlling operation of the rotary heads and running of the video tape in accordance with the reproduced control signal.
Claim 3
Dependent Claim
348 words
A recording and reproducing apparatus for recording and reproducing a plurality of video signals having a vertical sync signal onto and from a video tape running relatively to a rotary cylinder by rotary head pairs mounted on the rotary cylinder, the video tape having a control track and a recording track and tracks with a predetermined recording track pitch, the apparatus comprising (A) a recording system including: synchronization processing means (42) for controlling phases of the vertical sync signal of said video signals so as to be synchronized with each other; recording processing means (2, 8) for converting said video signals into recordable signals, respectively; a first pair of rotary heads (3, 4), each head having a track width narrower than said recording track pitch and a gap azimuth angle having a reverse direction to each other and being located at an opposite position on the cylinder, the pair recording a first one of the recordable signals onto the video tape and reading out the same signal from the video tape; a second pair of rotary heads (9, 10), each head having a track width narrower than said recording track pitch and a gap azimuth angle having a reverse direction to each other and being located at an opposite position on the cylinder, the pair recording a second one of the recordable signals onto the video tape and reading out the same signal from the video tape; and means (16, 18) for generating a control signal synchronously with the vertical sync signal included in any one of the video signals and for recording said control signal to the control track, and (B) a playback system used with said first and second pairs of rotary heads, the playback system including: playback processing means (12, 49) for reconstructing signals read out and reproduced thorugh one of said frist and second pairs of the rotary heads into video signals; and servo means (19, 20) for reproducing the control signal and for controlling oper- tion of the rotary heads and running of the video tape in accordance with the reproduced control signal.
Claim 4
Dependent Claim
348 words
A recording and reproducing apparatus for recording and reproducing a plurality of video signals having a vertical sync signal onto and from a video tape running relatively to a rotary cylinder by rotary head pairs mounted on the rotary cylinder, the video tape having a control track and a recording track and tracks with a predetermined recording track pitch, the apparatus comprising (A) a recording system including: synchronization processing means (42) for controlling phases of the vertical sync signal of said video signals so as to be synchronized with each other; recording processing means (2, 8) for converting said video signals into recordable signals, respectively; a first pair of rotary heads (3, 4), each head having a track width narrower than said recording track pitch and a gap azimuth angle having a reverse direction to each other and being located at an opposite position on the cylinder, the pair recording a first one of the recordable signals onto the video tape and reading out the same signal from the video tape; a second pair of rotary heads (9, 10), each head having a track width narrower than said recording track pitch and a gap azimuth angle having a reverse direction to each other and being located at an opposite position on the cylinder, the pair recording a second one of the recordable signals onto the video tape and reading out the same signal from the video tape; and means (16, 18) for generating a control signal synchronously with the vertical sync signal included in any one of the video signals and for recording said control signal to the control track, and (B) a playback system used with said first and second pairs of rotary heads, the playback system including: playback processing means (12, 49) for reconstructing signals read out and reproduced thorugh one of said frist and second pairs of the rotary heads into video signals; and servo means (19, 20) for reproducing the control signal and for controlling oper- tion of the rotary heads and running of the video tape in accordance with the reproduced control signal.
Claim 5
Dependent Claim
65 words
An apparatus according to claim 1 or 2, wherein the servo means (20) controls the video tape to run in a standard mode, the first pair of the rotary heads (3, 4) is a type for a long time mode and the second pair of the rotary heads (9, 10) comprises rotary heads having same azimuth angle to the first pair of the rotary heads.
Claim 6
Independent Claim
51 words
An apparatus according to any preceding claim, the apparatus having a standard recording mode (SP) and a long time recording mode (EP) to record a single video signal in addition to a mode to simultaneously record the plurality of video signals, and either one of said modes is selectable upon recording.
Claim 7
Independent Claim
98 words
An apparatus according to any preceding claim used with a video tape accommodated with a linear audio track, the apparatus further comprising a first audio signal recording means (51, 52) for recording audio signal onto the linear audio track of the video tape corresponding to the first one of the recordable video signal, and a second audio signal recording means (60) including rotary heads (61, 62) for recording frequency modulated audio signals by the rotary heads in accordance with the second one of the recordable video signals in the mode to simultaneously record the plurality of video signals.
Claim 8
Independent Claim
55 words
An apparatus according to any preceding claim, wherein the playback processing means comprises a selecting circuit (15) for selecting and switching one of the reproduced signals derived from the first (3, 4) and second (9, 10) pair of the rotary heads and a reproduction circuit (12) for regenerating video signal from the selected reproduced signal.
Claim 9
Independent Claim
44 words
An apparatus according to any preceding claim, the apparatus comprising a plurality of playback processing means (12, 49) for regenerating a plurality of video signals from the reproduced signals derived from the first (3, 4) and second (9, 10) pair of the rotary heads.
Claim 10
Independent Claim
45 words
An apparatus according to any preceding claim, wherein said synchronization processing means (42) delays the vertical sync signal of the second one of the video signals by a predetermined period to synchronize with the vergical sync signal of the first one of the video signals.
References Cited (Backward Citations)
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