Patent EP0052450A1 successfully refreshed from Google Patents.
Patent EP0580367A2 successfully refreshed from Google Patents.
EP0580367A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Video signal transmission, recording and reproduction
Assignee: Sony Corp
•
Filing: 1993-07-16
•
Granted: —
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Expires: 2013-07-16
Abstract
Abstract In a digital video tape recorder (VTR) (31, 32) which reproduces digital video and audio signals from a magnetic tape, a copy protect bit in the reproduced digital video signal is detected (6), and on the basis of the copy protect bit, a code is generated (7) and inserted (8) into the vertical blanking interval of the reproduced video signal. When a video signal (which may be in analog or digital form) having the code in the vertical blanking interval is received in a digital VTR, the code is detected (20) and recording of the video signal and an associated audio signal is inhibited (18, 21, 22, 23) if the code indicates that the received video signal is copy protected.
Inventors
- 👤 Keiji C/O Intellectual Property Div. Kanota
- 👤 Hajime C/O Intellectual Property Div. Inoue
- 👤 Yukio C/O Intellectual Property Div. Kubota
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 12:08
CPC Classifications
G; G11; G11B; G11B33/00; G11B33/12; G11B33/121; G11B15/00; G11B15/02; G11B15/05; G11B15/087; G11B17/00; G11B17/22; G11B17/28; G11B20/00; G11B20/00086; G11B20/00188; G11B20/00195; G11B20/0021; G11B20/00217; G11B20/00246; G11B20/00731; G11B20/00746; G11B20/00753; G11B20/00768; G11B27/00; G11B27/02; G11B27/031; G11B27/032; H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/913; H04N5/92; H04N5/9201; H04N5/9206; H04N7/00; H04N7/08; H04N7/087; H04N7/088; H04N7/0887; G11B2220/00; G11B2220/20; G11B2220/90; H04N2005/91307; H04N2005/91321; H04N2005/91328; H04N2005/91357; H04N2005/91364
Claims Analysis
Total Claims: 114
Claim 1
Independent Claim
75 words
A method of transmitting a video signal comprising the steps of: forming (7) a digital code that includes at least a copy protection bit and category information which identifies a type of device from which the video signal is transmitted; multiplexing (8) said digital code with a video signal having a vertical blanking interval to form a multiplexed video signal having said digital code in said vertical blanking interval; and transmitting said multiplexed video signal.
Claim 2
Dependent Claim
21 words
A method according to claim 1; wherein said multiplexed video signal is transmitted (10) in the form of an analog signal.
Claim 3
Dependent Claim
154 words
A video recording apparatus comprising: means (14, 16) for receiving a multiplexed video signal having a vertical blanking interval that includes a digital code containing at least a copy protection bit and category information for identifying a type of equipment from which the multiplexed video signal was transmitted; means (13, 15) for receiving an audio signal associated with said multiplexed video signal; means (20) for determining whether or not copying of said video signal is permitted based on said copy protection bit and said category information; means (25) for recording the received video and audio signals if it is determined by said means for determining (20) that copying of said video signal is permitted; and means (18, 21, 22, 23) for inhibiting recording of at least one of said video signal and said audio signal if it is determined by said means for determining (20) that copying of said video signal is not permitted.
Claim 4
Dependent Claim
28 words
Apparatus according to claim 3; wherein said means for recording (25) includes means (25, 26) for recording the received video and audio signals on a magnetic tape (27).
Claim 5
Dependent Claim
43 words
Apparatus according to claim 3; wherein the received video and audio signals are analog signals and further comprising means (15, 16, 19) for converting said signals to digital video and audio signals, said digital signals being recorded by said means for recording (25).
Claim 6
Dependent Claim
43 words
Apparatus according to claim 3; wherein said means for inhibiting (18, 21, 22, 23) includes means (18) for scrambling said video signal so that said means for recording (25) records a scrambled video signal from which a video picture cannot be satisfactorily displayed.
Claim 7
Dependent Claim
30 words
Apparatus according to claim 3; wherein said means for inhibiting (18, 21, 22, 23) includes means (23) for muting said audio signal so that said audio signal is not recorded.
Claim 8
Dependent Claim
88 words
Apparatus according to claim 3; further comprising: means (2, 3) for reproducing a digital video signal from a magnetic tape; means (6) for detecting a copy guard signal that is present in said reproduced digital video signal; means (7) for generating an ID signal in accordance with the detected copy guard signal; means (8) for inserting said ID signal into a vertical blanking period of said reproduced digital video signal to form a multiplexed digital video signal; and means (10, 12) for outputting said multiplexed digital video signal.
Claim 9
Dependent Claim
29 words
Apparatus according to claim 8; wherein said reproduced digital video signal is a compressed digital video signal, and further comprising means (5) for expanding said compressed digital video signal.
Claim 10
Dependent Claim
42 words
Apparatus according to claim 8; wherein said means (10, 12) for outputting said multiplexed digital video signal includes means (10) for converting said multiplexed digital video signal into an analog video signal having said ID signal in a vertical blanking interval thereof.
Claim 11
Dependent Claim
109 words
Apparatus according to claim 3; further comprising: means (2, 3) for reproducing a digital video signal from a magnetic tape (1); means (10) for converting said reproduced digital video signal into an analog video signal; means (6) for detecting a copy guard signal that is present in said reproduced digital video signal; means (7) for generating an ID signal in accordance with the detected copy guard signal; means (8) for inserting said ID signal into a vertical blanking period of said analog video signal; and means (10, 12) for outputting said analog video signal having said ID signal inserted in said vertical blanking period of said analog video signal.
Claim 12
Dependent Claim
29 words
Apparatus according to claim 11; wherein said reproduced digital video signal is a compressed digital video signal, and further comprising means (5) for expanding said compressed digital video signal.
Claim 13
Independent Claim
108 words
A method of transmitting a video signal comprising the steps of: reproducing (2, 3) a digital video signal from a magnetic tape (1); detecting (6) a copy guard signal that is present in said reproduced digital video signal; generating (7) an ID signal in accordance with the detected copy guard signal; inserting (8) said ID signal into a vertical blanking period of said reproduced digital video signal to form a multiplexed digital video signal; converting (10) said multiplexed digital video signal into an analog video signal having said ID signal in a vertical blanking interval of said analog video signal; and transmitting (10, 12) said analog video signal.
Claim 14
Dependent Claim
47 words
A method according to claim 13, wherein said reproduced digital video signal is a compressed digital video signal, and further comprising the step of expanding (5) said compressed digital video signal, said ID signal being inserted into a vertical blanking period of said expanded digital video signal.
Claim 15
Dependent Claim
29 words
A method according to claim 13; wherein said ID signal includes a copy protection bit for indicating whether said multiplexed digital video signal is to be protected from copying.
Claim 16
Dependent Claim
27 words
A method according to claim 15; wherein said ID signal includes category information for identifying a type of device from which said analog video signal is transmitted.
Claim 17
Independent Claim
101 words
A method of transmitting a video signal comprising the steps of: reproducing (2, 3) a digital video signal from a magnetic tape (1); converting (10) said reproduced digital video signal into an analog video signal; detecting (6) a copy guard signal that is present in said reproduced digital video signal; generating (7) an ID signal in accordance with the detected copy guard signal; inserting (8) said ID signal into a vertical blanking period of said analog video signal; and transmitting (10, 12) said analog video signal having said ID signal inserted in said vertical blanking period of said analog video signal.
Claim 18
Dependent Claim
41 words
A method according to claim 17, wherein said reproduced digital video signal is a compressed digital video signal, and further comprising the step of expanding (5) said compressed digital video signal before the same is converted into said analog video signal.
Claim 19
Dependent Claim
29 words
A method according to claim 17; wherein said ID signal includes a copy protection bit for indicating whether said multiplexed digital video signal is to be protected from copying.
Claim 20
Dependent Claim
27 words
A method according to claim 19; wherein said ID signal includes category information for identifying a type of device from which said analog video signal is transmitted.
Claim 21
Dependent Claim
86 words
A video reproducing apparatus comprising: means (2, 3) for reproducing a digital video signal from a magnetic tape; means (6) for detecting a copy guard signal that is present in said reproduced digital video signal; means (7) for generating an ID signal in accordance with the detected copy guard signal; means (8) for inserting said ID signal into a vertical blanking period of said reproduced digital video signal to form a multiplexed digital video signal; and means (10, 12) for outputting said multiplexed digital video signal.
Claim 22
Dependent Claim
29 words
Apparatus according to claim 21; wherein said reproduced digital video signal is a compressed digital video signal, and further comprising means (5) for expanding said compressed digital video signal.
Claim 23
Dependent Claim
41 words
Apparatus according to claim 21; wherein said means (10, 12) for outputting said multiplexed digital video signal includes means (10) for converting said multiplexed digital signal into an analog video signal having said ID signal in a vertical blanking interval thereof.
Claim 24
Dependent Claim
28 words
Apparatus according to claim 21; wherein said ID signal includes a copy protection bit for indicating whether said multiplexed digital video signal is to be protected from copying.
Claim 25
Dependent Claim
26 words
Apparatus according to claim 24; wherein said ID signal includes category information for identifying a type of device from which said analog video signal is transmitted.
Claim 26
Dependent Claim
107 words
A video reproducing apparatus comprising: means (2, 3) for reproducing a digital video signal from a magnetic tape (1); means (10) for converting said reproduced digital video signal into an analog video signal; means (6) for detecting a copy guard signal that is present in said reproduced digital video signal; means (7) for generating an ID signal in accordance with the detected copy guard signal; means (8) for inserting said ID signal into a vertical blanking period of said analog video signal; and means (10, 12) for outputting said analog video signal having said ID signal inserted in said vertical blanking period of said analog video signal.
Claim 27
Dependent Claim
29 words
Apparatus according to claim 26; wherein said reproduced digital video signal is a compressed digital video signal, and further comprising means (5) for expanding said compressed digital video signal.
Claim 28
Dependent Claim
28 words
Apparatus according to claim 26; wherein said ID signal includes a copy protection bit for indicating whether said multiplexed digital video signal is to be protected from copying.
Claim 29
Dependent Claim
26 words
Apparatus according to claim 28; wherein said ID signal includes category information for identifying a type of device from which said analog video signal is transmitted.
Claim 30
Dependent Claim
237 words
A video recording and reproducing apparatus comprising: means (14, 16) for receiving a multiplexed video signal having a vertical blanking interval that includes a digital code containing at least a copyright protection bit and category information for identifying a type of equipment from which the multiplexed video signal was transmitted; means (13, 15) for receiving an audio signal associated with said multiplexed video signal; means (20) for determining whether or not copying of said video signal is permitted based on said copyright protection bit and said category information; means (25) for recording the received video and audio signals if it is determined by said means for determining that copying of said video signal is permitted; means (18, 21, 22, 23) for inhibiting recording of at least one of said video signal and said audio signal if it is determined by said means for determining (20) that copying of said video signal is not permitted; means (2, 3) for reproducing a digital video signal from a recording medium (1) ; means (6) for detecting a copy guard signal that is present in said reproduced digital video signal; means (7) for generating an ID signal in accordance with the detected copy guard signal; means (8) for inserting said ID signal into a vertical blanking period of said reproduced digital video signal to form a multiplexed digital video signal; and means (10, 12) for outputting said multiplexed digital video signal.
Claim 31
Dependent Claim
14 words
Apparatus according to claim 30; wherein said recording medium is a magnetic tape (1).
Claim 32
Dependent Claim
47 words
Apparatus according to claim 31; wherein the received video and audio signals are analog signals and further comprising means (15, 16) for converting said signals to digital video and audio signals, said digital signals being recorded on said magnetic tape (27) by said means (25) for recording.
Claim 33
Dependent Claim
57 words
Apparatus according to claim 30; wherein said recording medium is a first magnetic tape (1) and the received video and audio signals are analog signals, and further comprising means (15, 16) for converting said signals to digital video and audio signals, said digital signals being recorded by said means for recording on a second magnetic tape (27).
Claim 34
Dependent Claim
93 words
Apparatus according to claim 33; wherein said means for outputting (10, 12) said multiplexed digital video signal includes means (10) for converting said multiplexed digital video signal into an analog video signal having said ID signal in a vertical blanking interval thereof, and further comprising means interconnecting said means for outputting and said means for receiving, said received analog video and audio signals including the analog video signal output from said means for outputting, said digital code included in said received video signal being said ID signal generated by said means for generating.
Claim 35
Dependent Claim
42 words
Apparatus according to claim 30; wherein said means (18, 21, 22, 23) for inhibiting includes means (18) for scrambling said video signal so that said means for recording records a scrambled video signal from which a video picture cannot be satisfactorily displayed.
Claim 36
Dependent Claim
30 words
Apparatus according to claim 30; wherein said means (18, 21, 22, 23) for inhibiting includes means (23) for muting said audio signal so that said audio signal is not recorded.
Claim 37
Dependent Claim
29 words
Apparatus according to claim 30; wherein said reproduced digital video signal is a compressed digital video signal, and further comprising means (5) for expanding said compressed digital video signal.
Claim 38
Dependent Claim
255 words
A video recording and reproducing apparatus comprising: means (14, 16) for receiving a multiplexed video signal having a vertical blanking interval that includes a digital code containing at least a copy protection bit and category information for identifying a type of equipment from which the multiplexed video signal was transmitted; means (13, 15) for receiving an audio signal associated with said multiplexed video signal; means (20) for determining whether or not copying of said video signal is permitted based on said copy protection bit and said category information; means (25) for recording the received video and audio signals if it is determined by said means for determining that copying of said video signal is permitted; means (18, 21, 22, 23) for inhibiting recording of at least one of said video signal and said audio signal if it is determined by said means for determining that copying of said video signal is not permitted; means (2, 3) for reproducing a digital video signal from a recording medium (1); means (10) for converting said reproduced digital video signal into an analog video signal; means (6) for detecting a copy guard signal that is present in said reproduced digital video signal; means (7) for generating an ID signal in accordance with the detected copy guard signal; means (8) for inserting said ID signal into a vertical blanking period of said analog video signal; and means (10, 12) for outputting said analog video signal having said ID signal inserted in said vertical blanking period of said analog video signal.
Claim 39
Dependent Claim
14 words
Apparatus according to claim 38; wherein said recording medium is a magnetic tape (1).
Claim 40
Dependent Claim
47 words
Apparatus according to claim 39; wherein the received video and audio signals are analog signals and further comprising means (15, 16) for converting said signals to digital video and audio signals, said digital signals being recorded on said magnetic tape (1) by said means (25) for recording.
Claim 41
Dependent Claim
57 words
Apparatus according to claim 38; wherein said recording medium is a first magnetic tape (1) and the received video and audio signals are analog signals, and further comprising means (15, 16) for converting said signals to digital video and audio signals, said digital signals being recorded by said means for recording on a second magnetic tape (27).
Claim 42
Dependent Claim
59 words
Apparatus according to claim 41; further comprising means interconnecting said means for outputting (10, 12) and said means for receiving, and wherein said received analog video and audio signals include the analog video signal output from said means for outputting, said digital code included in said received video signal being said ID signal generated by said means for generating.
Claim 43
Dependent Claim
43 words
Apparatus according to claim 38; wherein said means (18, 21, 22, 23) for inhibiting includes means (18) for scrambling said video signal so that said means for recording (25) records a scrambled video signal from which a video picture cannot be satisfactorily displayed.
Claim 44
Dependent Claim
30 words
Apparatus according to claim 38; wherein said means (18, 21, 22, 23) for inhibiting includes means (23) for muting said audio signal so that said audio signal is not recorded.
Claim 45
Dependent Claim
29 words
Apparatus according to claim 38; wherein said reproduced digital video signal is a compressed digital video signal, and further comprising means (5) for expanding said compressed digital video signal.
Claim 46
Independent Claim
148 words
A method of recording a video signal comprising the steps of: receiving (14, 16) a multiplexed video signal having a vertical blanking interval that includes a digital code containing at least a copy protection bit and category information for identifying a type of equipment from which the multiplexed video signal was transmitted; receiving (13, 15) an audio signal associated with said multiplexed video signal; determining (20) whether or not copying of said video signal is permitted based on said copy protection bit and said category information; recording (25) the received video and audio signals if it is determined by said means for determining that copying of said video signal is permitted; and inhibiting (18, 21, 22, 23) recording of at least one of said video signal and said audio signal if it is determined by said means for determining that copying of said video signal is not permitted.
Claim 47
Dependent Claim
24 words
A method according to claim 46; wherein said recording step (25) includes recording the received video and audio signals on a magnetic tape (27).
Claim 48
Dependent Claim
42 words
A method according to claim 46; wherein the received video and audio signals are analog signals and further comprising the step of converting (15, 16) said signals to digital video and audio signals, said recording step (25) including recording said digital signals.
Claim 49
Dependent Claim
40 words
A method according to claim 46; wherein said inhibiting step (18, 21, 22, 23) includes scrambling (18) said video signal so that said recorded video signal is a scrambled video signal from which a video picture cannot be satisfactorily displayed.
Claim 50
Dependent Claim
28 words
A method according to claim 46; wherein said inhibiting step (18, 21, 22, 23) includes muting (23) said audio signal so that said audio signal is not recorded.
Claim 51
Independent Claim
83 words
A method of reproducing a video signal comprising the steps of: reproducing (2, 3) a digital video signal from a magnetic tape (1); detecting (6) a copy guard signal that is present in said reproduced digital video signal; generating (7) an ID signal in accordance with the detected copy guard signal; inserting (8) said ID signal into a vertical blanking period of said reproduced digital video signal to form a multiplexed digital video signal; and outputting (10, 12) said multiplexed digital video signal.
Claim 52
Dependent Claim
31 words
A method according to claim 51, wherein said reproduced digital video signal is a compressed digital video signal, and further comprising the step of expanding (5) said compressed digital video signal.
Claim 53
Dependent Claim
32 words
A method according to claim 51, wherein said outputting step includes converting (10) said multiplexed digital signal into an analog video signal having said ID signal in a vertical blanking interval thereof.
Claim 54
Dependent Claim
29 words
A method according to claim 51, wherein said ID signal includes a copy protection bit for indicating whether said multiplexed digital video signal is to be protected from copying.
Claim 55
Dependent Claim
27 words
A method according to claim 54; wherein said ID signal includes category information for identifying a type of device from which said analog video signal is transmitted.
Claim 56
Independent Claim
87 words
A method of reproducing a video signal comprising the steps of: reproducing (2, 3) a digital video signal from a magnetic tape (1) ; converting (10) said reproduced digital video signal into an analog video signal; generating (7) an ID signal in accordance with the detected copy guard signal; inserting (8) said ID signal into a vertical blanking period of said analog video signal; and outputting (10, 12) said analog video signal having said ID signal inserted in said vertical blanking period of said analog video signal.
Claim 57
Dependent Claim
31 words
A method according to claim 56, wherein said reproduced digital video signal is a compressed digital video signal, and further comprising the step of expanding (5) said compressed digital video signal.
Claim 58
Dependent Claim
29 words
A method according to claim 56, wherein said ID signal includes a copy protection bit for indicating whether said multiplexed digital video signal is to be protected from copying.
Claim 59
Dependent Claim
27 words
A method according to claim 58; wherein said ID signal includes category information for identifying a type of device from which said analog video signal is transmitted.
Claim 60
Independent Claim
237 words
A method of recording and reproducing a video signal, comprising the steps of: receiving (14, 16) a multiplexed video signal having a vertical blanking interval that includes a digital code containing at least a copy protection bit and category information for identifying a type of equipment from which the multiplexed video signal was transmitted; receiving (13, 15) an audio signal associated with said multiplexed video signal; determining (20) whether or not copying of said video signal is permitted based on said copy protection bit and said category information; if it is determined by said means for determining that copying of said video signal is permitted, recording (25) the received video and audio signals in digital form on a recording medium (27), said digital form including a copy guard signal; inhibiting (18, 21, 22, 23) recording of at least one of said video signal and said audio signal if it is determined by said means for determining that copying of said video signal is not permitted; reproducing (23) said digital video signal from said recording medium (1) ; detecting (6) said copy guard signal that is present in said reproduced digital video signal; generating (7) an ID signal in accordance with the detected copy guard signal; inserting (8) said ID signal into a vertical blanking period of said reproduced digital video signal to form a multiplexed digital video signal; and outputting (10, 12) said multiplexed digital video signal.
Claim 61
Dependent Claim
14 words
A method according to claim 60; wherein said recording medium is a magnetic tape.
Claim 62
Dependent Claim
33 words
A method according to claim 60; wherein the received video and audio signals are analog signals and further comprising the step of converting (15, 16) said signals to digital video and audio signals.
Claim 63
Dependent Claim
40 words
A method according to claim 60; wherein said inhibiting step (18, 21, 22, 23) includes scrambling (18) said video signal so that said recorded video signal is a scrambled video signal from which a video picture cannot be satisfactorily displayed.
Claim 64
Dependent Claim
28 words
A method according to claim 60; wherein said inhibiting step (18, 21, 22, 23) includes muting (23) said audio signal so that said audio signal is not recorded.
Claim 65
Dependent Claim
41 words
A method according to claim 60; wherein said digital video signal that is recorded on and reproduced from said recording medium is a compressed digital video signal, and further comprising the step of expanding (5) said reproduced compressed digital video signal.
Claim 66
Dependent Claim
32 words
A method according to claim 60; wherein said outputting step includes converting (10) said multiplexed digital signal into an analog video signal having said ID signal in a vertical blanking interval thereof.
Claim 67
Dependent Claim
29 words
A method according to claim 60; wherein said ID signal includes a copy protection bit for indicating whether said multiplexed digital video signal is to be protected from copying.
Claim 68
Dependent Claim
27 words
A method according to claim 67; wherein said ID signal includes category information for identifying a type of device from which said analog video signal is transmitted.
Claim 69
Independent Claim
254 words
A method of recording and reproducing a video signal, comprising the steps of: receiving (14, 16) a multiplexed video signal having a vertical blanking interval that includes a digital code containing at least a copy protection bit and category information for identifying a type of equipment from which the multiplexed video signal was transmitted; receiving (13, 15) an audio signal associated with said multiplexed video signal; determining (20) whether or not copying of said video signal is permitted based on said copy protection bit and said category information; if it is determined by said means for determining that copying of said video signal is permitted, recording (25) the received video and audio signals in digital form on a recording medium, said digital form including a copy guard signal; inhibiting (18, 21, 22, 23) recording of at least one of said video signal and said audio signal if it is determined by said means for determining that copying of said video signal is not permitted; reproducing (2, 3) said digital video signal from said recording medium (1); converting (10) said reproduced digital video signal into an analog video signal; detecting (6) said copy guard signal that is present in said reproduced digital video signal; generating (7) an ID signal in accordance with the detected copy guard signal; inserting (8) said ID signal into a vertical blanking period of said analog video signal; and outputting (10, 12) said analog video signal having said ID signal inserted in said vertical blanking period of said analog video signal.
Claim 70
Dependent Claim
14 words
A method according to claim 69; wherein said recording medium is a magnetic tape.
Claim 71
Dependent Claim
33 words
A method according to claim 69; wherein the received video and audio signals are analog signals and further comprising the step of converting (15, 16) said signals to digital video and audio signals.
Claim 72
Dependent Claim
40 words
A method according to claim 69; wherein said inhibiting step (18, 21, 22, 23) includes scrambling (18) said video signal so that said recorded video signal is a scrambled video signal from which a video picture cannot be satisfactorily displayed.
Claim 73
Dependent Claim
28 words
A method according to claim 69; wherein said inhibiting step (18, 21, 22, 23) includes muting (23) said audio signal so that said audio signal is not recorded.
Claim 74
Dependent Claim
41 words
A method according to claim 69; wherein said digital video signal that is recorded on and reproduced from said recording medium is a compressed digital video signal, and further comprising the step of expanding (5) said reproduced compressed digital video signal.
Claim 75
Dependent Claim
29 words
A method according to claim 69; wherein said ID signal includes a copy protection bit for indicating whether said multiplexed digital video signal is to be protected from copying
Claim 76
Dependent Claim
27 words
A method according to claim 75; wherein said ID signal includes category information for identifying a type of device from which said analog video signal is transmitted.
Claim 77
Independent Claim
78 words
An apparatus for transmitting a video signal, comprising: means (7) for forming a digital code that includes at least a copy protection bit and category information which identifies a type of device from which the video signal is transmitted; means (8) for multiplexing said digital code with a video signal having a vertical blanking interval to form a multiplexed video signal having said digital code in said vertical blanking interval; and means for transmitting said multiplexed video signal.
Claim 78
Dependent Claim
20 words
An apparatus according to claim 77; wherein said multiplexed video signal is transmitted in the form of an analog signal.
Claim 79
Independent Claim
91 words
An apparatus for transmitting a video signal, comprising: means (2, 3) for reproducing a digital video signal from a magnetic tape (1) ; means (6) for detecting a copy guard signal that is present in said reproduced digital video signal; means (7) for generating an ID signal in accordance with the detected copy guard signal; means (10) for converting said multiplexed digital video signal into an analog video signal having said ID signal in a vertical blanking interval of said analog video signal; and means for transmitting said analog video signal.
Claim 80
Dependent Claim
46 words
An apparatus according to claim 79; wherein said reproduced digital video signal is a compressed digital video signal, and further comprising means (5) for expanding said compressed digital video signal, said ID signal being inserted into a vertical blanking period of said expanded digital video signal.
Claim 81
Dependent Claim
29 words
An apparatus according to claim 79; wherein said ID signal includes a copy protection bit for indicating whether said multiplexed digital video signal is to be protected from copying.
Claim 82
Dependent Claim
27 words
An apparatus according to claim 81; wherein said ID signal includes category information for identifying a type of device from which said analog video signal is transmitted.
Claim 83
Independent Claim
108 words
An apparatus for transmitting a video signal, comprising: means (2, 3) for reproducing a digital video signal from a magnetic tape (1); means (10) for converting said reproduced digital video signal into an analog video signal; means (6) for detecting a copy guard signal that is present in said reproduced digital video signal; means (7) for generating an ID signal in accordance with the detected copy guard signal; means (8) for inserting said ID signal into a vertical blanking period of said analog video signal; and means for transmitting said analog video signal having said ID signal inserted in said vertical blanking period of said analog video signal.
Claim 84
Dependent Claim
40 words
An apparatus according to claim 83; wherein said reproduced digital video signal is a compressed digital video signal, and further comprising means (5) for expanding said compressed digital video signal before the same is converted into said analog video signal.
Claim 85
Dependent Claim
29 words
An apparatus according to claim 83; wherein said ID signal includes a copy protection bit for indicating whether said multiplexed digital video signal is to be protected from copying.
Claim 86
Dependent Claim
27 words
An apparatus according to claim 85; wherein said ID signal includes category information for identifying a type of device from which said analog video signal is transmitted.
Claim 87
Independent Claim
76 words
An apparatus for receiving a video signal, comprising: means (14, 16) for receiving a multiplexed video signal having a vertical blanking interval that includes a digital code containing at least a copy protection bit and category information for identifying a type of equipment from which the multiplexed video signal was transmitted; and means (20) for determining whether or not copying of said video signal is permitted based on said copy protection bit and said category information.
Claim 88
Dependent Claim
15 words
An apparatus to claim 87; wherein the received multiplexed video signal is an analog signal.
Claim 89
Independent Claim
82 words
An apparatus for receiving a video signal, comprising: means for receiving a video signal that includes a copy guard signal; means (6) for detecting said copy guard signal included in said received video signal; means (7) for generating an ID signal in accordance with the detected copy guard signal; means (8) for inserting said ID signal into a vertical blanking period of said received video signal to form a multiplexed video signal; and means (10, 12) for outputting said multiplexed video signal.
Claim 90
Dependent Claim
16 words
An apparatus according to claim 89; wherein said received video signal is a digital video signal.
Claim 91
Dependent Claim
25 words
An apparatus according to claim 89; wherein said means for receiving includes means (2, 3) for reproducing said video signal from a recording medium (1).
Claim 92
Dependent Claim
15 words
An apparatus according to claim 91; wherein said recording medium is a magnetic tape (1).
Claim 93
Dependent Claim
14 words
An apparatus according to claim 91; wherein said recording medium is an optical disk.
Claim 94
Dependent Claim
14 words
An apparatus according to claim 91; wherein said recording medium is a magneto-optical disk.
Claim 95
Dependent Claim
19 words
An apparatus according to claim 89; wherein said means for receiving includes means for decoding a cable television signal.
Claim 96
Dependent Claim
20 words
An apparatus according to claim 89; wherein said means for receiving includes means for decoding a satellite broadcast television signal.
Claim 97
Dependent Claim
20 words
An apparatus according to claim 89; wherein said means for receiving includes means for receiving an over-the-air broadcast television signal.
Claim 98
Dependent Claim
19 words
An apparatus according to claim 89; wherein said means for outputting outputs said multiplexed video signal in analog form.
Claim 99
Independent Claim
131 words
An apparatus for transmitting and receiving a video signal, comprising: means (7) for forming a digital code that includes at least a copy protection bit and category information which identifies a type of device from which the video signal is transmitted; means (8) for multiplexing said digital code with a video signal having a vertical blanking interval to form a multiplexed video signal having said digital code in said vertical blanking interval; means for transmitting said multiplexed video signal; means for receiving said multiplexed video signal which was transmitted by said means for transmitting; and means (20) for determining whether or not copying of said received video signal is permitted based on said copy protection bit and said category information contained in said vertical blanking interval of said received video signal.
Claim 100
Dependent Claim
22 words
An apparatus according to claim 99; wherein said multiplexed video signal is transmitted and received in the form of an analog signal.
Claim 101
Independent Claim
75 words
A method of receiving a video signal comprising the steps of: receiving (14, 16) a multiplexed video signal having a vertical blanking interval that includes a digital code containing at least a copy protection bit and category information for identifying a type of equipment from which the multiplexed video signal was transmitted; and determining (20) whether or not copying of said video signal is permitted based on said copy protection bit and said category information.
Claim 102
Dependent Claim
16 words
A method according to claim 101; wherein the received multiplexed video signal is an analog signal.
Claim 103
Independent Claim
75 words
A method of receiving a video signal comprising the steps of: receiving a video signal that includes a copy guard signal; detecting (6) said copy guard signal included in said received video signal; generating (7) an ID signal in accordance with the detected copy guard signal; inserting (8) said ID signal into a vertical blanking period of said received video signal to form a multiplexed video signal; and outputting (10, 12) said multiplexed video signal.
Claim 104
Dependent Claim
16 words
A method according to claim 103; wherein said received video signal is a digital video signal.
Claim 105
Dependent Claim
22 words
A method according to claim 103; wherein said receiving step includes reproducing (2, 3) said video signal from a recording medium (1).
Claim 106
Dependent Claim
15 words
A method according to claim 105; wherein said recording medium is a magnetic tape (1).
Claim 107
Dependent Claim
14 words
A method according to claim 105; wherein said recording medium is an optical disk.
Claim 108
Dependent Claim
14 words
A method according to claim 105; wherein said recording medium is a magneto-optical disk.
Claim 109
Dependent Claim
16 words
A method according to claim 103; wherein said receiving step includes decoding a cable television signal.
Claim 110
Dependent Claim
17 words
A method according to claim 103; wherein said receiving step includes decoding a satellite broadcast television signal.
Claim 111
Dependent Claim
17 words
A method according to claim 103; wherein said receiving step includes receiving an over-the-air broadcast television signal.
Claim 112
Dependent Claim
16 words
A method according to claim 103; wherein said output multiplexed video signal is an analog signal.
Claim 113
Independent Claim
116 words
A method of transmitting and receiving a video signal comprising the steps of: forming (7) a digital code that includes at least a copy protection bit and category information which identifies a type of device from which the video signal is transmitted; multiplexing (8) said digital code with a video signal having a vertical blanking interval to form multiplexed video signal having said digital code in said vertical blanking interval; transmitting said multiplexed video signal; receiving said transmitted multiplexed video signal; and determining (10) whether or not copying of said received video signal is permitted based on said copy protection bit and said category information contained in said vertical blanking interval of said received video signal.
Claim 114
Dependent Claim
22 words
A method according to claim 113; wherein said multiplexed video signal is transmitted and received in the form of an analog signal.
References Cited (Backward Citations)
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